Bradford White LAARS OmniTherm ONH1250 Installation And Operation Instructions Manual Download Page 51

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Page 51

The

MNI

HERM

TB1-27

HIGH VOLTAGE PANEL

ENCLOSURE FAN

LOW VOLTAGE PANEL

ENCLOSURE FAN

TB1-36

TB1-38

TB1-40

TT-1

TT-2

DHW

TB1-35 TT-1

TB1-37 TT-2

TB1-39 DHW

(24VDC)

HEAT DEMANDS

TB1-54 Common

DRY CONTACTS

ALARM RELAY

TB1-59 GND

TB1-59
TB1-60

TB1-60

TB1-62

TB1-61

GND

B
A

TB1-56

TB1-55

TB1-58

TB1-57
TB1-58 A

N.O.

N.C.

RS485
BMS

CASCADE

RS485

DRY CONTACTS

TB1-33 DHW

INPUTS

BMS (-)
0-10V (+)

Common

Pump(-)
0-10V(+)

Spare 1

Spare 2

TB1-50

TB1-49

TB1-52

TB1-51

TB1-53

N.C.
N.O.

TB1-44

TB1-46

TB1-45

TB1-48

TB1-47

OUTPUT

ANALOG

RUN RELAY

SPARE
INPUTS

ANALOG
INPUT

Outdoor
Outdoor

TT-2

Spare 1

TB1-38 TT-1

TB1-40

TB1-39

TB1-42

TB1-41

TB1-43

DHW

TB1-34

TB1-36

TB1-35

TB1-37 TT-1

DHW

DEMANDS

HEAT

Spare 1

Spare 2

Supply

System

Return

System

Spare 1

ALARM
BELL

TB1-28
TB1-29
TB1-30

TB1-32

TB1-31

TB1-23
TB1-24
TB1-25
TB1-26

CONTACTS

DRY

SENSOR

(OUTPUTS)

Boiler (N)
Pump (L)

Pump

Pump
System

TB1-17

TB1-21
TB1-22

TB1-18
TB1-19
TB1-20

DHW

POWER
OUTPUTS

Outlet

Sensor

X1-1

X1-13

2
1

Inlet

FACTORY
INSTALLED

Dual Element

10k

20k

10k

20k

X1-1

X1-3

X1-15

X1-1

X1-14

X1-2

Dual Element

Flue

HIGH GAS PRESSURE

CONDENSATE

IGNITOR

SPARK

X15-4

GENERATOR

RELAY INTERLOCK

GAS VALVE

(OPTIONAL)

X4-4

X4-7

X12-3

SPARK

ARHL

X14-8

TB1-21

TB1-19

X4-1

X14-3

FLOW

X14-4

TB1-18

X4-17

X12-4

X4-14

X4-8

X9-3

X4-5

X4-11

X4-2

FLAME

ROD

TB1-17

TB1-22

TB1-20

X4-3

X4-6

X4-9

(OPTIONAL)

MAIN VALVE

X4-18

TB1-7

X4-15

LWCO

X14-10

X4-12

X14-1

X14-11

LOW GAS PRESSURE

SPARE

X4-16

X4-19

(OPTIONAL)

DHW PUMP
DRY CONTACT

MRHL

BOILER PUMP

SYSTEM PUMP
DRY CONTACT

(NOT INCLUDED)

X4-13

24V

120L

BOILER/HEATER

CONTROLLER

LWCO

BOILER/HEATER

CONTROLLER

GAS VALVE

24N

120N

SAFETY CHAIN

(24VDC)

TB 24VAC

TB 120VAC

24VAC TRANSFORMER

208/220/240VAC (1PH/60Hz)

BLOWER MOTOR

120L

120N

TB 120VAC

120VAC TRANSFORMER

BLOWER CONTACTOR

POWER SWITCH

POWER INDICATOR

OFF

L1 L2

NOTES:

1. FOR SOURCE FILE, REFERENCE SOLIDWORKS ELECTRICAL PROJECT 34,

DRAWING NUMBER E23842.

0060

PROJECT #

SOFTWARE DWG. NO:

INTENDED SIZE:

BY LAARS HEATING SYSTEMS CO.

UPDATED TO ADD FAN TO CONTROL PANEL

CHECK

DRAFT

ECN

ENGR APPR

APPR

CHANGE:

17-152N-03

REV.

DG 3/7/19 RR 3/7/19

SH 3/7/19

SCALE: NONE

PURPOSE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING

TITLE:

E23842

LOGIC DIAGRAM, 220V 1 PHASE,

1/8"

OMT 1.5 - 2.5

DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY OTHER

TOLERANCES ARE:

REPRODUCED, TRANSFERRED TO OTHER DOCUMENTS, USED OR

FRACTIONS

.010

DECIMALS .XXX

SH 7MAY18

REVISIONS

JM 7MAY18

N/A

FINISH

MATERIAL:

DECIMALS .XX .03

DECIMALS .X

DIMENSIONS ARE IN INCHES.

UNLESS OTHERWISE SPECIFIED:

APPR

ENGR

DRAFT

APPROVALS

REV.

SHEET 1 OF 1

THIS DOCUMENT AND THE INFORMATION CONTAINED HEREIN ARE

PROPRIETARY TO LAARS HEATING SYSTEMS CO.AND SHALL NOT BE

ANGLES

DO NOT SCALE DRAWING.

THIRD ANGLE PROJECTION.

N/A

Figure 23. Logic Diagram 220V 1 Phase 1500 to 2500

Summary of Contents for LAARS OmniTherm ONH1250

Page 1: ...VERTISSEMENT Assurez vous de bien suivres les instructions données dans cette notice pour réduire au minimum le risque d incendie ou d explosion ou pour éviter tout dommage matériel toute blessure ou la mort Ne pas entreposer ni utiliser d essence ni d autres vapeurs ou liquides inflammables dans le voisinage de cet appareil ou de tout autre appareil QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ Ne pa...

Page 2: ... Water Flow and Headloss Data 4 A General Water Flow Information 24 4 B Boiler Water Flow Headloss Data 25 4 C Water Heater Flow and Headloss Data 25 4 D Recovery Data 26 SECTION 5 Piping 5 A Boiler Water Piping 27 5 A 1 Boiler Water Connections 27 5 A 2 Cold Water Make Up 27 5 A 3 Freeze Protection 27 5 A 4 Suggested Boiler Piping Schematics 28 5 B Water Heaters 32 5 B 1 Water Quality 32 5 B 2 He...

Page 3: ...8 E 11 About the Firmware of the touchscreen 86 8 E 12 Dev Fan 86 8 E 13 Fan Settings 86 8 F Messages and USB 87 8 F 1 Messages 87 8 F 2 USB Functionality 87 8 G Active Demands 88 SECTION 9 Gas Valve Touchscreen Menus and Descriptions 9 A About the Gas Valve 89 9 B Menu Structure Example 90 9 C Gas Valve Display Navigation and Menus 90 9 D Fuel Air Ratio Ignition Menus 93 9 D 1 OEM 93 9 D 2 Igniti...

Page 4: ...LAARS Heating Systems ...

Page 5: ...amp 150psi PRV D Auto manual K Gateway LONworks E ONH 125psi PRV 2 Flange kit ONV w H Stamp 30psi PRV high limits alarm bell F 150psi PRV 3 Flange kit ONV w H Stamp 50psi PRV E Gateway BACnet IP high limits G Flange kit 30psi PRV 4 Flange kit ONV w H Stamp 60psi PRV alarm bell L Alarm high limits H Flange kit 50psi PRV 5 Flange kit ONV w H Stamp 75psi PRV F Gateway BACnet IP J Flange kit 60psi PRV...

Page 6: ...omestic hot water use adjust the outlet control limit or use temperature limiting valves to obtain a maximum water temperature of 125 F 52 C WARNING The inlet gas pressure to the unit must not exceed 13 W C 3 2kPa WARNING Fire or Explosion Hazard Improper conﬁguration can cause fuel buildup and explosion Improper user operation may result in property loss severe physical injury or death Any change...

Page 7: ...attempt any service or repair work involving RCF without wearing the following protective gear 1 A National Institute for Occupational Safety and Health NIOSH approved respirator 2 Long sleeved loose ﬁtting clothing 3 Gloves 4 Eye Protection NOTE All installations must be made in accordance with 1 American National Standard Z223 1 NFPA54 Latest Edition National Fuel Gas Code or 2 CSA B149 1 Natura...

Page 8: ...and Components 1 E 1 Model 1250 1500 OMT 1 5 1 25 5 20 5 48 4 11 5 12 17 7 58 6 2 39 12 62 26 7 24 24 5 66 10 3 21 6 Electrical Connections Air Inlet Vent 2 1 2 Inlet Cond Trap 2 1 2 Outlet Dims are in Inches 2 NPT Gas PRV Gas Valve Reset Sight Glass ...

Page 9: ... Valve Touchscreen Control Panel Power Pack Air Filter Box Manual gas valve Water Outlet Water Inlet Vent Condensate Trap Heat Exchanger Blower Gas Valve System Controls Touchscreen Power Connections Power Connections Conduit ...

Page 10: ...stems 1 E 2 Model 1750 OMT 1 75 65 8 0 44 20 2 16 55 6 20 1 31 6 32 0 69 43 53 29 8 14 25 8 5 7 25 8 Electrical Connections Air Inlet Vent Cond Trap 3 Outlet 3 Inlet Dims are in Inches 2 NPT Gas PRV Gas Valve Reset Sight Glass ...

Page 11: ...nd Top Panel Manual gas valve Manual Gas Valve Power Pack Control Panel Air Filter Box Gas Inlet Blower Gas Valve Water Outlet Water Inlet Vent Condensate Trap PRV Heat Exchanger System Controls Touchscreen Power Connections Power Connections Conduit ...

Page 12: ...ere for size reference only 1 E 3 Models 2000 2500 OMT 2 0 2 5 60 32 0 78 0 42 8 53 DIMS ARE IN INCHES INLET O T 60 8 0 54 3 20 2 15 9 5 8 20 1 0 78 0 42 8 53 PRV 2 NPT Electrical Connections COND TRAP OUTLET 1 8 OR FLANGE INLET 3 GROOVE LOCK N INCHES 8 AIR INLET VENT 14 16 26 8 60 2500 2000 5 7 65 6 ...

Page 13: ...RM Gas Valve Touchscreen Heat Exchanger Power Pack Air Filter Box Power Connections Manual gas valve System Controls Touchscreen Blower Water Outlet Water Inlet Vent Condensate Trap PRV Gas Valve Power Connections Conduit ...

Page 14: ...nd there is potential for snow accumulation in the local area both terminals should be installed at an appropriate level above grade or the maximum expected snow line The dimensions and requirements that are shown in Table 1 should be met when choosing the location for the unit Ensure the location takes into account the maximum allowable vent length shown in SECTION 2 of this manual NOTE The unit ...

Page 15: ...ncing within 12 inches 30 cm of the top of the enclosure shall be permitted The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that directly communicate with the outdoors and shall have a minimum free area of 1 square inch per 3000 Btu hr 7 square cm kW of the total input rating of all equipment located in t...

Page 16: ... 41 8 20 100 30 5 Equivalent Feet To calculate measure the linear feet of the pipe and add 5 ft 1 5m for each elbow used Category I vent must be sized in the U S per the National Fuel Gas Code ANSI Z223 1 or in Canada per CSA B149 1 as a fan assisted Category I appliance Pipe sizes shown are typical but may not meet the requirements of every system Notes 1 Category III vent pipe must be stainless ...

Page 17: ...ucts to infiltrate occupied spaces If the appliances are allowed to operate in this condition serious injury or death may occur It is for this reason that in addition to following proper vent sizing construction and safety requirements from WARNING Operationofapplianceswithablockedcommonventmay lead to serious injury or death Safety devices must be implementedtopreventblockedcommonventoperation If...

Page 18: ...erture de décharge Utiliser la flamme d une allumette ou d une chandelle ou la fumée d une the National Fuel Gas Code ANSI Z223 1 or in Canada from CSA B149 1 as well as all applicable local codes it is required that installers provide some means to prevent operation with a blocked common vent It is suggested that a blocked vent safety system be employed such that all appliances attached to the ve...

Page 19: ...a méthode indiquée ci dessus que chaque appareil raccordé au système d évacuation est mis à l air libre de façon adéquate Remettre les portes et les fenêtres les ventilateurs les registres de cheminées et les appareils au gaz à leur position originale 7 Tout mauvais fonctionnement du système d évacuation commun devrait être corrigé de façon que l installation soit conforme au National Fuel Gas Cod...

Page 20: ...emical fumes e g cleaning fluid chlorine compounds etc 2 Locate the terminal so that it will not be subject to damage by accident or vandalism It must be at least 7 feet 2 1 m above a public walkway 3 Locate the combustion air terminal so that it cannot be blocked by snow The National Fuel Gas Code requires that it be at least 12 inches 30 cm above grade but the installer may determine it should b...

Page 21: ...nlet Other than Direct vent 4 ft 1 2m below 36 inches 91 cm to any other unit or to side of opening 1 ft 30 cm above opening K Clearance to a mechanical air supply inlet 3 feet 91 cm above if within 10 feet 3 m 6 feet 1 83 m horizontally L Clearance above paved sidewalk or paved Vent termination not allowed in this location 7 ft 2 1 m driveway located on public property for category IV units See n...

Page 22: ... be installed in such a way as to reduce the risk of burns from contact with the vent terminal must be equipped with the inlet air and exhaust terminal kits listed in Table 9 Additional instructions are supplied with the terminal kits WARNING If installing outdoors in a location that may experience freezing temperatures provisions must be made to protect the unit from freeze damage Manufacturer do...

Page 23: ...han one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRUCTIONS 4 Inspection The state or local gas inspector of the side wall horizontally vented gas fueled unit shall not approve the installation unless upon inspection the inspector observes carbon monoxide detectors and signage installed in accordance with the provisions of 248 CMR 5 08 2 a 1 4 NOTE This unit and all other ...

Page 24: ...0 6 630 400 560 1 080 350 587 935 1 650 3 370 6 100 Notes 400 546 870 1 540 3 140 5 680 1 Inlet pressure 11 0 in w c Notes 2 Pressure drop 0 5 in w c 1 Inlet pressure Less than 2 psi 3 Specific gravity 1 50 2 Pressure drop 0 5 in w c 4 Schedule 40 metallic pipe 3 Specific gravity 0 60 5 Intended use Pipe sizing betwe Capacity in Cubic Feet of Gas per Hour Pipe Size in Natural Gas Undi Pip Capacity...

Page 25: ...oss Data See Table 11 for water flow and boiler headloss based on heat exchanger temperature rise 4 C Water Heater Water Flow and Headloss Data Water flow and headloss for water heaters is based on the water s hardness to help minimize scale mineral buildup inside the heater s water tubes Table 12 shows water flow and headloss based on the hardness of the system s water Temperature rise is shown f...

Page 26: ...983 1785 2000 5160 4128 3440 2948 2580 2293 2064 2500 6450 5160 4300 3686 3225 2867 2580 22 C 28 C 33 C 39 C 44 C 50 C 56 C L h L h L h L h L h L h L h 1250 12049 9639 8033 6885 6024 5355 4820 1500 14288 11431 9526 8165 7144 6350 5715 1750 16868 13495 11246 9639 8434 7497 6747 2000 19504 15603 13003 11145 9752 8668 7802 2500 24380 19504 16253 13931 12190 10836 9752 Temperature Rise Temperature Ris...

Page 27: ...ical Company Dow Chemical Company The boiler control offers some assistance with freeze protection as long as the boiler is energized and able to fire 5 A 1 Boiler Water Connections NOTE This unit must be installed in a closed pressure system with a minimum of 12 psi 82 7 kPa static pressure at the boiler The water piping should be supported by suitable hangers or floor stands Do not support the p...

Page 28: ... as a working installation drawing Local code requirements must be met 5 A 4 Suggested Boiler Piping Schematics Figure 4 on page 28 through Figure 7 on page 31 show suggested piping configurations for boilers These diagrams are only meant as guides All components or piping required by local code must be installed 1 If the outlet sensor detects less than 45 F the control energizes the boiler pump 2...

Page 29: ...p radiant zone Low temp radiant zone Air vent Water feed controls Expansion tank 4 pipe dia max Note This drawing is a schematic representation of a piping style and is not intended to be used as a working installation drawing Local code requirements must be met 4 pipe Dia Max Indirect DHW tank Anti scald mixing valve Domestic hot water out Cold water ...

Page 30: ...r feed controls Expansion tank 4 pipe dia max 4 pipe dia max 4 pipe dia max Note This drawing is a schematic representation of a piping style and is not intended to be used as a working installation drawing Local code requirements must be met Common piping must be sized for the combined water flow of all the boilers Indirect DHW tank Anti scald mixing valve Domestic hot water out Cold water Note I...

Page 31: ...ng zone circuits Space heating zone circuit Air vent Water feed controls Expansion tank Common piping must be sized for the combined water flow of all the boilers High temp space heating zone circuit 4 pipe dia max 4 pipe dia max 4 pipe dia max 4 pipe Dia Max Note This drawing is a schematic representation of a piping style and is not intended to be used as a working installation drawing Local cod...

Page 32: ...nfigurations for water heaters These diagrams are only meant as guides All components or piping required by local code must be installed Figure 8 DHW Piping One Heater One Vertical Tank NOTES 1 Locate DHW sensor or remote aquastat well in lower 1 3 of tank 2 Backflow preventer may be required check local codes 3 Thermal expansion tank may be required check local codes 4 Caution Pump sizing must be...

Page 33: ...hardness at job site 5 If the tank does not have a tapping for the cold water supply the supply may be run to the pipe between the tank and boiler inlet Figure 10 DHW Piping Two Heaters Two Vertical Tanks NOTES 1 Optional CWMU recirculation line location 2 Locate NTV DHW sensor or remote aquastat well in lower 1 3 of tank 3 Back Flow Preventer may be required Check local codes 4 Thermal expansion ...

Page 34: ...e manufacturer s responsibility CAUTION Label all wires prior to disconnection when servicing controls Wiringerrorscancauseimproperanddangerous operation Verifyproperoperationafteroperationservicing ATTENTION Au moment de l entretien des commandes étiquetez tous les fils avant de les débrancher Les erreurs de câblage peuvent nuire au bon fonctionnement et être dangereuses S assurer que l appareil ...

Page 35: ... of the high voltage box The 24 volt transformer is also redundantly protected by its integrated 4 amp resettable fuse All power connections must be run through the back panel as shown in Figure 12 Table 14 Electrical Data Single Phase Three Phase 120 240 208 600 480 208 L1 Blk Blk Blk L1 P BR Blk L2 N Wht Red Red L2 V O Red L3 T Y BL Table 15 Phase Voltage Color Identification Caution The supply ...

Page 36: ... DHW1 CH1 DHW1 CH2 DHW2 CH2 DHW2 DHW DHW3 DHW DHW3 SPARE 1 SPARE 1 SPARE 2 SPARE 2 BAS 0 10VDC BAS 0 10VDC PUMP 0 10VDC PUMP 0 10VDC RUN C RUN N C RUN N O ALARM C ALARM N C ALARM N O CASCADE B CASCADE A CASCADE GND BMS B BMS A BMS GND RS485 RS485 SENSORS HEAT DEMANDS SPARE INPUTS IN OUT DRY CONTACTS 27 28 7 E Field Connections Wiring for all field connections must be run through the available elec...

Page 37: ...is a dry contact the system pump supply voltage or system pump relay coil voltage would be applied at terminal 21 and when the system pump is activated power will be available at terminal 22 Contact ratings are 250VAC 1 5A maximum System pump functionality is configured using the touch screen Spare 1 and Spare 2 no functionality available on this unit 7 E 4 Alarm Bell If connecting an alarm bell u...

Page 38: ...mally open set of contacts whenever the unit is running Contact ratings are 250VAC 0 6A maximum Alarm when used is connected to terminals 54 common 55 normally closed and 56 normally open The controller closes the normally open set of contacts whenever the unit is locked out Contact ratings are 250VAC 0 6A maximum 7 E 11 RS 485 for Cascade Lead Lag This commercial unit can be connected in Lead Lag...

Page 39: ... DHW PUMP DHW PUMP SYSTEM PUMP SYSTEM PUMP SPARE 1 SPARE 1 SPARE 2 SPARE 2 24 DRY CONTACTS ALARM BELL ALARM BELL SYSTEM SUPPLY SYSTEM SUPPLY SYSTEM RETURN SYSTEM RETURN DHW DHW OUTDOOR OUTDOOR CH1 DHW1 CH1 DHW1 CH2 DHW2 CH2 DHW2 DHW DHW3 DHW DHW3 SPARE 1 SPARE 1 SPARE 2 SPARE 2 BAS 0 10VDC BAS 0 10VDC PUMP 0 10VDC PUMP 0 10VDC RUN C RUN N C RUN N O ALARM C ALARM N C ALARM N O CASCADE B CASCADE A C...

Page 40: ...7 Boiler Pump bit8 Aux Powered Contact bit 0 N A bit 1 Burner 1 Gas valve 1 23 Read 0 10VDC 4 20mA Output for Pump Spee AI 23 Read mV 27 Read Modulating Fan 1 Speed AI 27 Read RPM 33 Read Modulating Burner1 Firing rate AI 33 Read LOW FLOW ERROR 0 LOW WATER CUT OFF ERROR 1 MANUAL RESET HIGH LIMIT ERROR 2 BLOCKED FLUE ERROR 3 HIGH GAS PRESSURE ERROR 4 LOW GAS PRESSURE ERROR 5 AUTO RESET HIGH LIMIT E...

Page 41: ...ad F 52 Read History Maximum Boiler Outlet Temperatu AI 52 Read F 53 Read History Minimum Boiler Outlet Temperatu AI 53 Read F 54 Read History Boiler Average Firing Temperatur AI 54 Read F 55 Read History Boiler Maximum Firing Time AI 55 Read Hours 56 Read History Boiler Minimum Firing Time AI 56 Read Hours 64 Read Modulation Sensor AI 64 Read 0 None 1 Outlet 2 DHW 3 System 4 Inlet 5 Flue 6 System...

Page 42: ...2 Read Current firing rate of the Cascade Lead 0 100 83 Read Active CH Setpoint AI 83 Read 0 None 5 Start 24 Error Block 160 Standby 165 Check Safety Swtich 166 Run 177 Prepurge Open 181 Parameter Block 183 Lockout 188 Testmode 194 Prepurge Closed 195 Wait for HIS Free 196 HIS Preheat Prespark 200 Verify Primary SF 217 interpurge 241 Postpurge 245 Trial for Ignition 250 Trial for Ignition Main 52 ...

Page 43: ...te Cascade CH P AV 28 Read Write 157 Read Write Cascade CH I AV 29 Read Write 158 Read Write Cascade CH D AV 30 Read Write 163 Read Write Hybrid Set Point AV 35 Read Write 164 Read Write Hybrid Differential Temperature AV 36 Read Write 165 Read Write Vari Prime P Proportional Term AV 37 Read Write 166 Read Write Vari Prime I Integral Term AV 38 Read Write 167 Read Write Vari Prime D Derivative Ter...

Page 44: ...O BL O OUTDOOR RETURN SUPPLY SYSTEM SYSTEM DHW 29 30 27 28 32 31 33 DHW SYSTEM PUMP PUMP 21 22 20 19 BL W W BL R G BR BR Y BR G BR V O V MAIN POWER SWITCH 3 BK O 1 2 BK 4 BL Y W BK O G 120N GND GND 24V 24V 24V 24N 24N 24N 120L 120L 120L 120N 120N N 10 17 13 14 11 12 16 15 BOILER W 4 3 7 8 6 5 9 BR R W BL Y Flame Rod GND GND 1 2 2 TB1 1 G X5 1 X5 7 X5 2 X5 6 X8 9 X8 7 P G R W R BK V X8 1 X8 3 X8 5 ...

Page 45: ...UE B 100K t t t t FLUE A 100K RS485 BMS RS485 60 58 57 56 59 B A A W G V W BK 1 5 3 6 W V 7 4 8 Y R BR G W G Y G W G 8 PIN CONNECTOR C N C N O N C N O CONTACTS RUN RELAY ALARM RELAY CONTACTS 54 53 52 55 C B 50 49 51 C 47 48 BR R W R BR Inputs Analog 0 10VDC BAS 46 45 X9 2 9 TB1 16 1 24L TB1 12 1 24N TB1 2 2 GND X4 7 X4 17 X4 2 X4 12 X4 13 X4 3 X9 11 X4 8 X4 18 X4 19 X4 9 X4 6 X4 16 X4 5 X4 15 X4 1...

Page 46: ...ALL NOT BE 1 8 DECIMALS XX 3 2 RS HEATING SYSTEMS DWG NO E23819 SH FINISH 1 REV SH 3 8 19 DG 3 8 19 REVISIONS REV CHANGE APPR ENGR APPR ECN 010 SE EXCEPT AS SPECIFICALLY AUTHORIZED IN WRITING B 17 152N 03 RR 3 8 19 INTENDED SIZE SOFTWARE DWG NO C REV APPROVALS DRAFT ENGR B TITLE DUCED TRANSFERRED TO OTHER DOCUMENTS USED OR SED TO OTHERS FOR MANUFACTURING OR ANY OTHER DIMENSIONS ARE IN INCHES TOLER...

Page 47: ... AUTHORIZED IN WRITING 17 152N 03 RR 3 7 19 SCALE NONE INTENDED SIZE SOFTWARE DWG NO C SHEET 1 OF 1 REV APPROVALS DRAFT ENGR APPR CHECK REPRODUCED TRANSFERRED TO OTHER DOCUMENTS USED OR DISCLOSED TO OTHERS FOR MANUFACTURING OR ANY OTHER DIMENSIONS ARE IN INCHES TOLERANCES ARE ONE JUMPER 010 S NA MATERIAL JM 2 22 18 SH 2 22 18 UNLESS OTHERWISE SPECIFIED ADDED ENCLOSURE FAN ONE TERMINAL BLOCK THIRD ...

Page 48: ... BK O 1 DECIMALS XX E23824 A PROJECT D C B 1 FINISH NA 4 480 575 600V 3Ø OMT 2 5 Y LAARS HEATING SYSTEMS FMA56A REV DWG NO CHECK ECN SH A SH 3 7 19 DG 3 7 19 REVISIONS REV CHANGE DRAFT 2 3 E23824 1 ADDED ENCLOSURE FAN A 17 152N 03 RR 3 7 19 SCALE NONE INTENDED SIZE SOFTWARE DWG NO C SHEET 1 OF 1 REV APPROVALS DECIMALS XXX TITLE EPRODUCED TRANSFERRED TO OTHER DOCUMENTS USED OR APPR MATERIAL ENGR AP...

Page 49: ...ELAY INTERLOCK GENERATOR X15 4 SPARK IGNITOR CONDENSATE HIGH GAS PRESSURE GND X1 2 X1 14 X1 1 X1 15 X1 3 X1 1 INSTALLED FACTORY X1 13 X1 1 TB1 20 TB1 19 TB1 18 TB1 22 TB1 21 TB1 17 TB1 27 TB1 26 TB1 25 TB1 24 TB1 23 TB1 32 TB1 30 TB1 29 TB1 28 TB1 37 TB1 35 TB1 36 TB1 34 TB1 43 TB1 41 TB1 42 TB1 39 TB1 40 TB1 38 TB1 47 TB1 48 TB1 45 TB1 46 TB1 44 TB1 53 TB1 51 TB1 52 TB1 49 TB1 50 TB1 33 TB1 58 TB...

Page 50: ...ALARM BELL CONTACTS SENSOR INPUTS OUTPUTS Boiler N Pump L TB1 18 TB1 21 TB1 22 TB1 19 TB1 20 Pump System Pump DHW TB1 17 POWER OUTPUTS HIGH GAS PRESSURE CONDENSATE IGNITOR SPARK X15 4 GENERATOR RELAY INTERLOCK GAS VALVE OPTIONAL X4 4 X4 7 X12 3 SPARK ARHL X14 8 TB1 21 TB1 19 X4 1 X14 3 FLOW X14 4 TB1 18 X4 17 X12 4 X4 14 X4 8 X9 3 X4 5 X4 11 X4 2 P1 FLAME ROD TB1 17 TB1 22 TB1 20 X4 3 X4 6 X4 9 OP...

Page 51: ...1 1 X1 3 X1 15 X1 1 X1 14 X1 2 Dual Element 4 3 2 1 Flue 1 2 3 4 HIGH GAS PRESSURE CONDENSATE IGNITOR SPARK X15 4 GENERATOR RELAY INTERLOCK GAS VALVE OPTIONAL X4 4 X4 7 X12 3 SPARK ARHL X14 8 TB1 21 TB1 19 X4 1 X14 3 FLOW X14 4 TB1 18 X4 17 X12 4 X4 14 X4 8 X9 3 X4 5 X4 11 X4 2 P1 FLAME ROD TB1 17 TB1 22 TB1 20 X4 3 X4 6 X4 9 OPTIONAL MAIN VALVE X4 18 TB1 7 X4 15 LWCO X14 10 X4 12 X14 1 X14 11 LOW...

Page 52: ... Pump L TB1 18 TB1 21 TB1 22 TB1 19 TB1 20 Pump System Pump DHW TB1 17 POWER OUTPUTS HIGH GAS PRESSURE CONDENSATE IGNITOR SPARK X15 4 GENERATOR RELAY INTERLOCK GAS VALVE OPTIONAL X4 4 X4 7 X12 3 SPARK ARHL X14 8 TB1 21 TB1 19 X4 1 X14 3 FLOW X14 4 TB1 18 X4 17 X12 4 X4 14 X4 8 X9 3 X4 5 X4 11 X4 2 P1 FLAME ROD TB1 17 TB1 22 TB1 20 X4 3 X4 6 X4 9 OPTIONAL MAIN VALVE X4 18 TB1 7 X4 15 LWCO X14 10 X4...

Page 53: ...Page 53 The OMNITHERM This page intentionally left blank ...

Page 54: ...ion 8 E on page 82 Messages Will show an Exclamation Point when there is a message Clicking onto the Message icon will take you to the message itself The USB functionality will show the USB Icon at this location if being used See Section 8 F on page 87 Active Demands Will show icons that indicate the active parameters that are currently in demand See Section 8 G on page 88 Navigation Bar Top left ...

Page 55: ...screens may only allow you to set one or the other while some other screens example pump selection will allow you to select any or all of the options These windows will reflect the allowable ranges of the parameter Shows the current setting of the Parameter In this example you are in Home Configure Central Heat Central Heat One Up and Down arrows are used to increment the setting accordingly NOTE ...

Page 56: ... changes made during the initial setup and commissioning Be aware that in this level of password protection changes to the configuration setup may result in lock outs or conflicts with your system setup resulting in technical issues When unlocked in the Installer mode the icon will change to 3 OEM Configuration and parameter changes available only to the factory When unlocked in the OEM mode the i...

Page 57: ...hutdown Anti short Cycle and Time Date 8 C 1 CH Central Heat CH stands for central heat It is used for space heating demands On the Quick Start Screen touch the CH thermometer icon to navigate to the CH Selection Screen There are two identical heat demands CH1 and CH2 each with independent control algorithms and independent inputs on the input terminal strip see 8 D Configuration on page 61 Touchi...

Page 58: ...entral Heat Two 2 To navigate to the CH2 Quick Start Screen touch the CH2 Icon on the CH Quick Start Selection Screen The CH2 screen will have the same look and functionality as the CH1 Screen 8 C 2 DHW Domestic Hot Water DHW stands for domestic hot water To navigate to the DHW DHW3 Quick Start Screen touch the DHW icon on the Quick Start Screen The DHW DHW3 Quick Start Screen allows adjustment of...

Page 59: ...ature CH2 Minimum Water Temperature The minimum boiler CH2 outlet temperature based on the Maximum Outdoor Temperature 8 C 4 Warm Weather Shut Down Warm weather shut down allows the user to disable the heating system based on outside air temperature It is used for boilers only To navigate to the Warm Weather Quick Start Screen touch the Warm Weather Icon on the Quick Start Screen The Warm Weather ...

Page 60: ...ime after a heat demand is satisfied that the unit will wait to satisfy the next active heat demand NOTE Anti Short Cycle Time does not apply to DHW DHW3 heat demands 8 C 6 Time Date To navigate to the Time Date Quick Start Screen touch the Time Date area on any screen NOTE The Time is set in a 24 hour parameter but displays only as a 12 hour clock with the AM PM automatically added The Time Date ...

Page 61: ...the controller allows access to all parameters available based on the access level that is unlocked To navigate to the Configuration Screen touch the Configure Icon in the lower left portion of the Home Screen The Configuration Screen shows all configurable parameters ...

Page 62: ...wing parameters Ena ble Disable This allows CH1 to be enabled or disabled The default setting is Enabled Set Point This is the temperature set point for CH1 On Hysteresis The temperature at which the hysteresis will turn on Off Hysteresis The temperature at which the hysteresis will turn off PID Low controls the firing rate whenever the temperature is below the set point Lower values in P and I wi...

Page 63: ...n This value is the corrective action that is proportional to the error set point control temperature Integral Time This value is applied to the sum of the error over a period of time Derivative Time This value is applied to the rate of change of the error 8 D 1 a 2 PID High Active from Setpoint to Off Hysteresis of demand 8 D 1 b CH2 Central Heat Two Additional heat demand CH2 is available and is...

Page 64: ...dditional parameter for adjustment DHW Offset Upon a DHW DHW3 heat demand the unit will control the outlet temperature to the DHW Set Point plus the DHW Offset set point DHW Offset For example with a DHW DHW3 Set Point of 140 F and a DHW Offset of 40 F the unit will control the boiler heater outlet temperature to 180 F 140 F 40 F to satisfy the heat demand NOTE Only a DHW DHW3 heat demand can be i...

Page 65: ...s the adjustment of the following parameters Enable Disable Enables and disables the outdoor reset functionality Maximum Outdoor Temperature The outdoor temperature at which the unit will use the minimum water temperature as the set point Minimum Outdoor Temperature The outdoor temperature at which the unit will use the maximum water temperature as the set point CH1 Minimum Water Temperature The m...

Page 66: ...ation Screen The Cascade Screen provides four navigation icons to configure the system for cascade operations These navigation icons are Cascade This icon navigates to the Cascade Parameters screen Rotation This icon navigates to the cascade rotation screen Redundancy This icon navigates to the setup screen for cascade leader redundancy options CONFIGURATION NOTE Cascading Category l III OmniTherm...

Page 67: ...e Redundancy Boiler Internal Set Point this parameter is the maximum outlet temperature the local boiler heater is allowed to supply the system Lag On Hysteresis The value below the Max Lag Temp Max Lag Temp Lag On Hysteresis that the boiler heater will turn on to satisfy an active cascade demand based on the local boiler heater outlet water temperature Max Lag Temp is set at the Lead boiler heate...

Page 68: ...de For Recurrence Mode there are two parameters 1 Time of Day You can adjust the hour and minute of the day for rotation 2 Every X Days You can select how many days you want to wait until rotation and then it will rotate at the hour and minute of the day previously selected There are two options for cascade Rotation Setup Rotation Mode 1 Run Time 2 Recurrence The red circle with the exclamation ma...

Page 69: ...t demand it will continue to satisfy the heat demand upon loss of communication with the Leader Redundant Lead In a cascade configuration upon loss of communication with the lead unit a second unit will assume lead responsibilities This requires the 2nd lead to have a manual address of 2 and a 2nd system sensor installed at that unit Disable Redundancy In a cascade configuration upon loss of commu...

Page 70: ...Auto the pump will turn on automatically upon a call for heat Always On the pump will run continuously Disable the pump will not turn on upon a DHW heat demand DHW Pump Post Circulation This parameter is the amount of time the DHW pump will continue to run after a heat demand has been satisfied or after a lock out condition has occurred System Pump Control This parameter provides the ability to se...

Page 71: ...ime Derivative Time This value is applied to the rate of change of the error Minimum Speed This is the minimum speed to which the Vari Prime will control the pump Changes to min max speed require cycling power to accept the changes similar to changing communication protocols see Section 8 D 10 d on page 79 Maximum Speed The is the maximum speed to which the Vari Prime will control the pump Off Del...

Page 72: ...your system will fire Flue Limitation Sets the flue temp limitations Outlet Limitation Parameters Allows for the adjustment of Min and Max Outlet Temps 8 D 6 Manual Firing Rate To navigate to the Manual Firing Rate Screen touch the Manual Firing Rate Icon on the Configuration Screen The Manual Firing Rate Control Screen allows the adjustment of the following parameters Enable Disable Enables and d...

Page 73: ...mits Parameters Screen The Flue Limitation Parameters Screen allows adjustment of the following parameters Manual Reset Flue The temperature at which the unit will shut down due to exceeding a flue temperature manual reset condition Flue Temp MIN The flue temperature at which the unit will begin to de rate in an attempt to prevent a manual reset high flue temperature condition Flue Temp Max The fl...

Page 74: ...it of this parameter is so if the value of this parameter is 10000 or 100 00 this equates to 10 0VDC or 20mA ONH ONV models are on off units therefore firing rate is always 100 Demand Min This is the minimum value that corresponds to the control mode selected With Firing Rate control mode selected this is the minimum rate at which the boiler heater will run The unit of this parameter is so if the ...

Page 75: ...nput signal must be lower than Demand Off to remove the heat demand With an active demand the unit will locate the set point according to the analog input signal Using the default values for Boiler Max Set Point 180 F Boiler Min Set Point 140 F Demand Minimum 2 5VDC Demand Maximum 10 0VDC the unit will linearize the set point as shown in Figure 28 CONFIGURATION 8 D 9 Time Date To navigate to the T...

Page 76: ...r all configured CHW or DHW heating demands Anti short Cycle To navigate to the Anti short Cycle Configuration Screen The higher the number the higher the priority it is assigned Warm Weather To navigate to the Warm Weather Configuration Screen COM Port To navigate to the Communication Port Modbus BACnet MSTP Configuration Screen Temperature Conversion To navigate to the Temperature Conversion Con...

Page 77: ...iguration Screen touch the Miscellaneous Features Icon on the Configuration Screen then touch the Anti Short Cycle Icon on the Miscellaneous Features screen The Anti Short Cycle Configuration Screen allows adjustment of the following parameter Cycle Time The amount of time after a heat demand is satisfied that the unit will wait to initiate the next active heat demand NOTE Anti Short Cycle Time do...

Page 78: ...f time Summer Kick Period The duration of time between heat demands that the boiler will wait before exercising the boiler DHW and system pumps There are three options for Warm Weather Shutdown WWSD WWSD is only applicable to boilers It is not mandatory so it can be enabled disabled on the WWSD configuration screen 1 WWSD Shutdown Immediately When the outdoor sensor measures an outdoor air tempera...

Page 79: ...ess of the unit on the Modbus network Timeout Upon loss of communication this is the duration of time in which the unit will wait prior to timeout conditions occurring With BACnet protocol selected the following parameters are adjustable on this screen Baudrate BACnet can be configured for the following standard baudrates 9600 19200 38400 and 76800 Address The address of the unit on the BACnet net...

Page 80: ...t mode when the unit s inlet sensor reads the set point minus the hysteresis value It will leave anti frost mode at the set point plus the hysteresis value Hysteresis This parameter is a offset of the Anti Frost Set Point used to turn on off the Anti Frost mode Pump Control This parameter provides the ability to select which pump s are used in Anti Frost Mode The Set Point parameter is the tempera...

Page 81: ... Login Screen touch the Lock Icon on any screen The Login Screen allows the operator to make parameter adjustments based on the level of the login credentials See Section 8 B on page 56 Table 17 on page 101 indicates which parameters are available with each login level ...

Page 82: ...s 8 E Service Screens To navigate to the Service Screen touch the Service Icon in the lower left portion of the Home Screen SERVICE 8 E 1 Burner Enable Disable Available only to the factory or technician qualified at the OEM level ...

Page 83: ...ut indicator light is green The indicator light associated with the input is red when the input is not satisfied For example if the blower is off the air proving switch is not satisfied and the air proving switch digital input indicator light is red Digital I O Outputs The output is on the indicator light associated with that output is green For example if the boiler pump is running the boiler pum...

Page 84: ...ice Screen There are two screens associated with the Analog I O Analog I O Inputs Analog I O Outputs Analog I O Input There are three types of analog inputs temperature sensors flame signal and voltage current VDC mA Wiring of these inputs are covered in SECTION 7 NOTE If the input is not attached the value will be zero Inputs Outputs ...

Page 85: ...er user interaction has ceased AutoLock Timeout allows the user to adjust the amount of time the touch screen will remain unlocked with no user interaction 8 E 5 History Navigate to the History Screen by touching the History Button on the Service Screen The History Screen provides information on boiler operations and cycle counts The control accumulates and displays the number of heat demand cycle...

Page 86: ...calibration procedure as shown on the touch screen 8 E 7 Factory Reset Touching the Factory Reset Button on the Service Screen resets all touch screen adjustable parameters back to the factory default setting 8 E 8 HMI Model OEM only 8 E 9 BIC Model OEM only 8 E 10 Both Model OEM only 8 E 11 About About the Firmware version of the touchscreen 8 E 12 Dev Fan OEM only 8 E 13 Fan Settings OEM only SE...

Page 87: ...ameters and settings into a thumb drive for documentation purposes or copies these settings from unit to unit Upload Data from the boiler This is used to retrieve runtime data and history It captures all settings in a tab delimited text file for use with spreadsheet programs 8 F Messages and USB 8 F 1 Messages The Messages icon at the bottom of the home screen displays an Exclamation Point when me...

Page 88: ...indicates the status of active heat demands A black heat demand icon indicates the heat demand that is currently being satisfied A greyed out heat demand icon is either lower in priority than the heat demand that is currently being satisfied or the heat demand has reached set point but remains active ...

Page 89: ...s Valve Touchscreen Menus and Descriptions 9 A About the Gas Valve This unit utiizes a Honeywell Gas Valve with a touchscreen display Gas Valve Reset Sight Glass Gas Valve Reset Models 1250 and 1500 Sight Glass Models 1750 2000 and 2500 ...

Page 90: ...the system memory from a USB device File types that can be saved or loaded include A F curve valve configuration data and log files Search for Valves If for some reason Valve 1 doesn t appear on the display may need to search for the valve by pressing search for Valve Display Setup Allows the date and time to be set volume and brightness adjustments screen calibration modbus address settings and d...

Page 91: ...quence Not available Hi Gas Lo Gas Pressure Not available Fuel Air Ratio Ignition The sub menus found in Fuel Air Ratio Ignition allow for combustion setup ignition characteristics modification loading and saving A F curves and valve configurations Note your location Selections Valve Status This section gives general information about valve operation and hours and cycles Setup Tests Allows for val...

Page 92: ...on speed of the Modbus network Security This menu allows the installer and OEM passwords to be reset if needed If the passwords are changed the installer building owner is responsible for remembering the password to gain access to the system Laars doesn t have access to the installer password once changed Access Levels Controls the password level access to the settings of the gas valve This menu l...

Page 93: ...ned Pos 2 values can be used for troubleshooting From Setup Tests select Fuel Air Ratio Ignition MENU TABS Click back to Setup Tests 9 D Fuel Air Ratio Ignition Menus Fuel Air Ratio Ignition has several menus that allow for combustion setup Ignition characteristics modification Loading and saving A F curves and valve configurations 9 D 1 OEM ...

Page 94: ...condition the valve will lockout When first installing the boiler and getting the boiler setup the record ign air level button should be selected so that the proper air level can be recorded for the application The settings in the ignition tab allow the ignition characteristics of the boiler to be customized to fit the boiler application if needed In most cases customization will not be necessary ...

Page 95: ...yzer 3 Start point commissioning 4 Adjust CO2 levels Touch the lean arrows to decrease CO2 Touch Rich arrows to increase CO2 Double arrows move the CO2 richer or leaner faster than single arrows In most cases touching the double arrows is acceptable when adjusting the CO2 5 When the CO2 level is set correctly press set min if setting the min modulation point press set max if setting the maximum po...

Page 96: ... 9 D 6 Load Save Menu Allows for valve configurations A F curves and log files to be saved or loaded from system memory Saving the original A F curves to memory before starting to make adjustments will allow the installer to revert back to previous A F curves without having to make manual adjustments When loading valve configurations or A F curves the correction curve will be cleared so the correc...

Page 97: ...h to create a trend The time scale and variables to monitor can be selected from pulldown menus Reports creates a report of all of the gas valve settings A F curves faults ignition settings and OEM settings that can be used when trouble shooting the boiler This report is something that you may be asked to collect when requesting application support so settings and adjustments can be confirmed Data...

Page 98: ...m of the screen Press the Verify Safety Parameters button to proceed to the verification process 2 Select begin to start the verification process 3 Select yes if the parameter change is correct Select No if the parameter change is incorrect If No is selected the parameter must be changed to the correct setting and the verification process started again 4 If yes is selected press the reset button o...

Page 99: ...Page 99 The OMNITHERM ...

Page 100: ...es to a password protected parameter The login screen can also be accessed by pressing the login icon at the top of the gas valve display When entering a password select the installer tab and then enter the password LaarsOmt2018 Passwords are case sensitive 9 G Gas Valve Password Login Menu ...

Page 101: ...oint x x Lag On Hysteresis x x Lag Off Hysteresis x x Maximum Lag Temperature x x Backup Mode Max Lag Power x x Rotation Mode x x Run Time Hours x x Time of Day Hour x x Time of Day Minutes x x Every X Day x x Loss of Lead Setup x x Hybrid Enable Disable x x Hybrid Lag Mode x x Hybrid Setpoint x x x Hybrid Differential x x Hybrid Delay x x Boiler Pump Control x x Boiler Pump Post Circulation x x 1...

Page 102: ...ce Object Name x x Object Instance x x Timeout x x Burner Enable Disable x x Light Timeout x x x AutoLock Timeout x x x Disable Auto Always On Auto 0 secs 600 secs 60 secs 0 secs 600 secs 60 secs Disable Auto Always On Off During DHW Auto 2000 mV 10000 mV 10000 mV 0 secs 600 secs 60 secs 0 secs 120 secs 60 secs 0 10 0 0 mV 10000 mV 2000 mV 0 10 5 0 10 2 Minimum 0 100 100 0 F 60 F 20 F Firing Rate ...

Page 103: ... x x Minimum Off Time x x Lost Lead Backup Setpoint x x Lag On Hysteresis x x Lag Off Hysteresis x x Maximum Lag Temperature x x Rotation Mode x x Run Time Hours x x Time of Day Hour x x Time of Day Minutes x x Every X Day x x Loss of Lead Setup x x Hybrid Enable Disable x x Hybrid Lag Mode x x Hybrid Setpoint x x x Hybrid Differential x x Hybrid Delay x x 0 59 0 1 365 1 Disable Boiler Internal Se...

Page 104: ...ght Timeout x x x AutoLock Timeout x x x 5 5 Demand Priorities Disable Auto Always On Auto 0 secs 600 secs 60 secs Disable Auto Always On Off During DHW Auto Off When Temperature Reached Auto 0 secs 600 secs 60 secs Variprime NOT Available on Volume Water Units Firing Rate Disable Enable Disable Minimum Maximum Minimum Disable Auto Always On Off During DHW Auto 0 secs 600 secs 60 secs Temperature ...

Page 105: ...unit if any part has been under water Immediately call a qualified service technician to inspect the unit and to replace any part of the control system and any gas control that may have been under water SECTION 11 Initial startup Instructions 11 A Filling the Boiler System 1 Ensure the system is fully connected Close all bleeding devices and open the make up water valve Allow the system to fill sl...

Page 106: ... will not occur because the gas is turned off The ignition control will lockout c Open the gas shutoff valve Reset the boiler control by pressing the Reset button on the control Restart the unit The ignition sequence will start again and the burner will start The unit will return to its previous mode of operation WARNING If any odor of gas is detected or if the gas burner does not appear to be fun...

Page 107: ...e allowable range adjustments made To make adjustments to the gas air ratio use the Gas valve display inside the boiler jacket and follow the process below 1 Boiler display Configure Firing rate Force the fan speed to the desired RPM by navigating through the boiler display and setting the Fan RPM Enable fan speed and set the fan speed to desired RPM Use the following RPMs to set combustion 1000 1...

Page 108: ...2 richer or leaner faster than single arrows In most cases touching the double arrows is acceptable when adjusting the CO2 e When the CO2 level is set correctly press set min if setting the min modulation point press set max if setting the maximum point or Add Generic if setting a point between min and max If the point added or modified is close to another point on the correction curve the system ...

Page 109: ...wires before disconnecting them Wiring errors can cause improper and dangerous operation Verify proper operation after servicing WARNING Disconnect all power to the unit before attempting any service procedures Contact with electricity can result in severe injury or death NOTE The Warranty does not cover damage caused by lack of required maintenance lack of water flow or improper operating practic...

Page 110: ...the front door of the boiler to gain access to the top portion of the unit Remove the high tension ignition wire from the spark electrode Remove the flame sensor wire Remove the two 2 nuts and spacers holding the spark electrode assembly in place Pull the spark ignition electrodes out of the boiler slowly making sure to move the assembly as needed so the electrodes are not bent as they are being r...

Page 111: ...flue collector and into the longer condensate trap line which is being diverted into a separate container WARNING Failure to rinse the debris from the heat exchanger and temporary drain line may lead to clogged condensate lines traps and neutralizers Condensate pumps if used may also be damaged from the debris left behind possibly causing property damage 8 To place the unit back in operation insta...

Page 112: ...Check the manual reset high limit set point Auto Reset High Limit Outlet water temperature has exceeded the auto reset high limit setting Auto reset Condition Annunciation Warning High limit auto error on Message Screen Verify the system is full of water and all air has been purged from the system Verify the boiler heater is piped properly into the heating system Check for proper pump operations C...

Page 113: ...he resistance of each element of the sensor and compare to the resistance table below Replace if necessary Temp F 10K 20K Resistance Ω Resistance Ω 68 12555 25099 86 8025 16057 104 5279 10569 122 3563 7139 140 2463 4937 158 1739 3489 176 1253 2514 194 919 1845 212 685 1376 Outlet Sensor Drift Dual element sensor readings do not agree Manual reset Condition Annunciation on Navigation Bar Check the ...

Page 114: ...inuity Replace if necessary Burner Max Trials The maximum attempts for ignition has occurred without sensing flame Manual reset Condition Annunciation on Navigation Bar Verify supply and manifold gas pressures satisfy installation requirements Verify the proper intake and venting Inspect the burner Check pilot and main valve wiring and operation Check ignition transformer electrode flame detector ...

Page 115: ...2590 122 50 35270 140 60 24160 158 70 16870 176 80 12000 194 90 8674 212 100 6369 248 120 3581 284 140 2117 320 160 1307 356 180 839 392 200 558 428 220 382 464 240 269 500 260 194 536 280 143 Flow Switch Auto reset condition Annunciation Flow switch error on Message Screen Verify the system is full of water and all air has been purged from the system Verify the boiler heater is piped properly int...

Page 116: ...RMod Tubes R2084500 R2084500 R2084600 R2084600 R2084600 4 Condensate Switch 40N2008 40N2008 40N2008 40N2008 40N2008 5 FARMod Filter R2084700 R2084700 R2084700 R2084700 R2084700 6 FARMod R2084800 R2084800 R2084800 R2084800 R2084800 Final Assembly Part Numbers Part Number BACK VIEW 4 6 3 FARMOD FILTER 5 Final Assembly Models 1250 1500 1750 2000 and 2500 1 6 5 2 3 Item No Description 1250 1500 1750 2...

Page 117: ... 3 FILTER ASSY AIR INTAKE 150S2610 1 4 PANEL JACKET RIGHT 150S3006 1 5 PANEL JACKET LEFT 150S3007 1 6 PANEL JACKET TOP 150S3008 1 7 ACCESS PANEL 150S3013 1 8 DOOR ASSY LOWER 150S3024 1 9 DISPLAY PANEL R2083400 1 10 DISPLAY CONTROL R2082800 1 11 POWER SWITCH R2083200 1 12 FILTER AIR REPLACEMENT A2121700 1 Jacket Assembly Models 1250 and 1500 11 2 4 5 8 9 10 3 6 7 1 12 ...

Page 118: ...R 1 175S3002 5 PANEL JACKET LEFT LOWER 1 175S3018 6 PANEL JACKET RIGHT UPPER 1 175S3004 7 PANEL JACKET LEFT UPPER 1 175S3016 8 PANEL JACKET TOP 1 300S3005 9 ACCESS PANEL 1 300S3013 10 PANEL JACKET REAR 1 175S300100 11 PANEL ACCESS FLUE TOP 1 175S3024 12 PANEL ACCESS FLUE BOTTOM 1 175S302500 13 SWITCH POWER 1 R2083200 14 DISPLAY TOUCHSCREEN SIT 1 R2082800 15 FILTER AIR REPLACEMENT 1 A2121700 14 7 1...

Page 119: ...023 4 FILTER ASSY AIR INTAKE 1 250S2500 5 PANEL JACKET LEFT LOWER 1 300S3018 6 PANEL SIDE UPPER LEFT 1 250S3021 7 PANEL JACKET RIGHT LOWER 1 300S3002 8 PANEL SIDE UPPER RIGHT 1 250S3004 9 PANEL JACKET TOP 1 300S3005 10 PANEL JACKET REAR 1 250S300100 11 PANEL ACCESS FLUE TOP 1 250S3024 12 PANEL ACCESS FLUE BOTTOM 1 250S3025 13 ACCESS PANEL 1 300S3013 14 DISPLAY SIT 1 R2082800 15 SWITCH POWER 1 R208...

Page 120: ...SFORMER ASSY 120 24V 75 VA 150S7019 4 FAN COMPACT AC AXIAL E2392600 5 RELAY REPLACEMENT 110V SLIM E2385500 5 1 4 2 3 Control Panel Assembly Models 1250 1500 1750 2000 and 2500 PARTS LIST ITEM NO DESCRIPTION PART NO 1 SWITCH CUTOFF LOW WATER E2387600 2 BOARD CONTROL R2082700 3 TRANSFORMER ASSY 120 24V 75 VA 150S7019 4 FAN COMPACT AC AXIAL E2392600 5 RELAY REPLACEMENT 110V SLIM E2385500 5 1 4 2 3 ...

Page 121: ...OUD ASSEMBLY 1 1 R2082900 2 HEAT EXCHANGER 1 125S2141 1 150S2141 3 BLANKET INSULATION 1 1 150S2182 4 TEMPERATURE SENSOR 1 1 E2387700 5 VITAULIC COUPLING 2 2 P2101300 6 RFC TILE ASSY TOP 1 1 R2085600 7 RFC TILE ASSY BOTTOM 1 1 R2085700 Heat Exchanger Assembly Models 1250 and 1500 Heat Exchanger Assembly Models 1250 and 1500 ...

Page 122: ...PERATURE SENSOR 1 E2387700 1750 2500 5 VITAULIC COUPLING 2 P2109800 1750 2500 6 PRV 30 PSI 1 A2124000 1750 2500 PRV 50 PSI 1 A2124005 PRV 60 PSI 1 A2124004 PRV 75 PSI 1 A2124009 PRV 125 PSI 1 A2124013 PRV 150 PSI 1 A2124014 7 RFC TILE ASSY TOP 1 R2085800 1750 2500 8 RFC TILE ASSY BOTTOM 1 R2085900 1750 2500 Heat Exchanger Assembly Models 1750 2000 and 2500 Heat Exchanger Assembly Models 1750 2000 ...

Page 123: ...0 and 1500 Parts List QTY PART NO DESCRIPTION ITEM NO 1 R2004000 SWITCH HIGH GAS PRESSURE 1 1 V2028100 GAS VALVE 2 2 R2085100 O RING 3 1 R2004100 SWITCH LOW GAS PRESSURE 4 1 P2112100 FITTING ADAPTER 8mm TUBE TO 1 8 NPT 316 SST 5 1 KM008800 REGULATOR GAS 210E 2 X 2 MAXITROL 6 NOTES APPLY THREAD SEALANT TO ALL MALE 1 NPT THREADS BEFORE ASSEMBLY O RINGS INCLUDED WITH GAS VALVE 2 ITEM 6 FOR USE IN MAS...

Page 124: ... 2500 CSD 1 Version PARTS LIST QTY PART NO DESCRIPTION ITEM NO 1 R2004000 SWITCH HIGH GAS PRESSURE 1 1 V2026300 GAS VALVE 2 2 R2085200 O RING 3 1 R2004100 SWITCH LOWGAS PRESSURE 4 1 P2112100 FITTING ADAPTER 8mm TUBE TO 1 8 NPT 316 SST 5 1 KM008800 REGULATOR GAS 210E 2 X 2 MAXITROL 6 NOTES APPLY THREAD SEALANT TO ALL MALE 1 NPT THREADS BEFORE ASSEMBLY O RINGS INCLUDED WITH GAS VALVE 2 ITEM 6 FOR US...

Page 125: ...gaskets and hardware R2083000 6 SCREW 10 32 x 1 2 SHCS ZINC F2057200 7 GASKET BURNER S2131100 8 O RING 3 16 5 7 8 ID EPDM 150S5010 9 BLOWER 120V MODELS A2124400 BLOWER 208 220 240V MODELS A2134400 10 O RING BLOWER OMT 300S5039 11A MIXER ASSEMBLY FRONT R2084301 11B MIXER ASSEMBLY REAR R2084400 12 FITTING ADAPTER 8mm TUBE TO 1 8 NPT 316 SST P2112100 13 GASKET GAS MIXER S2132800 14 ORIFICE INSERT GAS...

Page 126: ...375 SHCS ZINC 6 GASKET BLOWER OUTLET FLANGE BLOWER 120V MODELS A2134500 A2134500 N A BLOWER 208 600V MODELS 8 O RING BLOWER 9A MIXER ASSY FRONT 9B MIXER ASSY REAR 10 FITTING ADAPTER 8mm TUBE TO 1 8 NPT 11 GASKET GAS MIXER 12 ORIFICE INSERT GAS INCLUDES GASKETS R2084002 R2084003 R2084004 13 ORIFICE INSERT AIR INCLUDES GASKETS R2084102 R2084103 R2084104 14 AIR STRAIGHTENER PART NUMBERS 7 R2084400 R2...

Page 127: ...ANSFORMER 208 X 416 PRIM 120 X 240 SEC 500 VA 50 60HZ E2385300 1 TRANSFORMER 240 X 480 PRIM 120 X 240 SEC 500 VA 50 60HZ E2384000 1 4 CIRCUIT BREAKER 2 POLE 3 0A DIN RAIL MNT E2355100 1 1 5 POWER RELAY COMBO FLANGE DIN RAIL MOUNT E2367900 1 1 6 WIRE HARNESS ASSY 208 220 240V 1Ø not shown 150S7402 1 1 AC Distribution Box Models 1250 and 1500 220 240V 4 3 H1 H4 SECONDARY 2 1 PRIMARY X1 X4 5 3 208V ...

Page 128: ... 50 60HZ 1 E2384000 2 CIRCUIT BREAKER 7 AMP PANEL MOUNT 1 1 E2378600 3 FAN AXIAL 4 11 16 SQUARE 1 1 12 DEEP 115VAC 1 1 E2376300 4 DIN RAIL ASSY 208 220 240V 1Ø 1 1 300S731702 5 CIRCUIT BREAKER 2 POLE 3 0 A DIN RAIL MNT 1 1 E2355100 6 POWER RELAY COMBO FLANGE DIN RAIL MOUNT 1 1 E2367900 7 CORD SET AXIAL FAN 90 DEG HEAD 24 LEAD not shown 1 1 E2376500 8 WIRE HARNESS ASSY 120V 1Ø not shown 1 250S7401 ...

Page 129: ...R 12 APM PANEL MOUNT 1 1 E2383400 5 CIRCUIT BREAKER 7 AMP PANEL MOUNT 1 1 1 E2378600 6 DIN RAIL ASSY 208V 3Ø 1 300S731703 DIN RAIL ASSY 480V 3Ø 1 300S731704 DIN RAIL ASSY 575 600V 3Ø 1 300S731705 7 POWER RELAY COMBO FLANGE DIN RAIL MOUNT 1 1 1 E2367900 8 CIRCUIT BREAKER 2 POLE 3 0A DIN RAIL MNT 1 E2355100 CIRCUIT BREAKER 2 POLE 1 6A DIN RAIL MNT 1 E2382700 CIRCUIT BRKR 2 POLE 600Y 277VAC 1 1 5A DI...

Page 130: ...79000 GAUGE TEMP PRESSURE 70 F MAX LO 320 F MIN HI 0 90 PSI 1 1 75 125 150 psi R0060600 9 BUSHING 1 1 4 NPT X 3 4 316 SS 1 1 P2072200 BUSHING 1 1 4 NPT X 1 NPT 316 SS 1 1 P2069000 10 NIPPLE PIPE 3 4 NPT CLOSE 316 SS 1 1 P2070700 NIPPLE 1 NPT X CLOSE SS 1 1 P2081500 NIPPLE 1 1 4 NPT X 1 5 8 CLOSE 316 SS 1 1 P2069202 11 VALVE PRV APOLLO 10 604 34 150 PSI 3 4 X 3 4 NPT 3 116 KBTU HR 1 1 A2124014 VALV...

Page 131: ...F MIN HI 0 230 PSI 1 1 30 50 60 psi RA0079000 GAUGE TEMP PRESSURE 70 F MAX LO 320 F MIN HI 0 90 PSI 1 1 75 125 150 psi R0060600 PARTS LIST ITEM NO DESCRIPTION HYDRONIC QTY VOL WAT QTY PART NO 1 VALVE SHUT OFF 3 4 NPT BRASS 1 1 R10 143 2 FLOW SWITCH KIT 1 1 250S4030 3 WELL IMMERSION 1 2 NPT 1 1 RE2058300 4 SENSOR TEMPERATURE 1 1 E2371200 5 NIPPLE CLOSE BLK 3 4 NPT 1 P0014100 NIPPLE 3 4 NPT CLOSE 31...

Page 132: ...the wh H2376700 Customer Service and Product Support 800 900 9276 Fax 800 559 1583 Headquarters 20 Industrial Way Rochester NH USA 03867 603 335 6300 Fax 603 335 3355 9 Brigden Gate Halton Hills Ontario Canada L7G 0A3 905 203 0600 Fax 905 636 0666 www Laars com Litho in U S A Laars 20 01 Document 1353 Dimensions and specifications subject to change without notice in accordance with our policy of c...

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