IBC SFC-125 Installation And Operating Instructions Manual Download Page 46

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INSTALLATION AND OPERATION INSTRUCTIONS

1-38

SFC COMBI BOILERS SFC-99, SFC-125

Remarks:

Number:

Material:

ojectnr:

Author:

Date:

Name:

ojection:

Size:

Units:

Scale:

17/02/15

HBs

16-121

Zie opmerkingen

Intergas V

erwarming B

Coevorden - The Netherlands

Rev:

This document r

emains our pr

oper

. Without r

estricted appr

oval fr

om the owner it is not allowed to copy or show this document to

a thir

d par

unless

otherwise

mentioned

±0.10

±0.20

±0.50

±0.20

±0.50

±0.80

±0.30

±0.80

±1.00

±0.50

±1.20

±2.00

±1.00

±2.00

±3.00

±1.50

±3.00

±5.00

0..5

5..30

30..100

100..500

500..1300

1300..>

Dimensions

Tolerances

Sticker L

adder Wiring Superflow Combi IBC

860004

1:1

jj/mm/dd

High Voltage

Control Module

Low Voltage

Control Module

SFC series Schematic Wiring Diagram

SFC series Ladder Wiring Diagram

Options

Blower

Motor

Boiler

Pump

Boiler

120V

Power Plug

Ignition

BMM

Gasvalve

DHW Flow Sensor

CH Supply NTC

DHW Hot NTC

DHW Hot Sensor

Space Heating

Presure Sensor

Space Heating

Pressure Sensor

Heat ex. Sensor

Flue Sensor

X14

Power Plug

120V

X15

Blower

300,0 mm

95,0 mm

Notes:

- Original wiring as supplied with the appliance must be replaced with type T wire or

its equivalent.

- The wiring for the 120V field connections to the appliance shall have a minimum

size of 14 AWG and a temperature rating of at least 194 °F (90°C).

Wire Color Code Key:

BK - Black

W - White

G - Green

BL - Blue

R - Red

O- Orange

V - Violet

Y - Yellow

BR - Brown

GY - Gray

860004.01

G W

R R

GY BK

1110 9

7 6 5 4

O G/Y

GY BK

G/Y

19/05/13

HBs

16-121

add color code key and changed material

Aquastat or

DHW Sensor
Outdoor Sensor
Thermostat

(by others)

Aquastat or

DWH Senor
Outdoor Sensor

Thermostat

(by others)

4 3

Figure 39: Electrical Wiring Connections (full page ladder diagram at back of this manual)

Summary of Contents for SFC-125

Page 1: ...he vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Immediately call your gas supplier from a nearby phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified install...

Page 2: ...sure Relief valve NPT 30psi 1 x Outdoor Temperature Sensor IBC part P 732 1 x SFC Installation Operating Instructions 1 x SFC SFB Controller Manual 1 x Propane Conversion Kit P 804 SFC 99 or P 806 SFC 125 WARNING If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or loss of life WARNING Points out a potentially hazardous...

Page 3: ...eating Coil psig 43 5 Max Operating Pressure Domestic Hot Water Coil psig 150 Minimum water pressure psig 8 Approved installation altitude ASL 10 000 ft Ambient Temperature Low F C 32 0 Ambient Temperature High F C 122 50 Max relative humidity non condensing 90 Min water Temperature Space Heating F C 50 10 Max water Temperature Space Heating F C 194 90 Min water Temperature Domestic Hot Water F C ...

Page 4: ...NSI Z223 1 NFPA 54 or the Natural Gas and Propane Installation Code CAN CSA B149 1 as applicable Failure to correctly install and operate this appliance can result in severe personal injury or death The unit shall have a pressure relief valve installed within 6 152mm of the DHW HOT outlet connection Refer to the unit s User Manual before operating the relief valve The unit requires a pressure reli...

Page 5: ...1 18 1 5 4 Further Installation Details 1 18 1 6 Water Piping SPACE HEATING 1 20 1 6 1 General Piping Considerations 1 20 1 6 2 Basic Heating Piping Arrangements 1 24 1 7 Domestic Hot Water System 1 29 1 7 1 Domestic Hot Water System 1 30 1 7 2 Domestic Hot Water Piping 1 30 1 8 Gas Piping 1 33 Removing the cover 1 34 1 9 Electrical Connections 1 34 1 9 1 120VAC Line Voltage Hook up 1 34 1 9 2 Pow...

Page 6: ...1 5 Burner 4 1 4 1 6 Heat Exchanger 4 2 4 1 7 Pump 4 2 4 1 8 Gas Piping 4 2 4 1 9 Control Module 4 2 4 1 10 Water Heating System 4 2 4 1 11 Freeze Protection 4 2 4 1 12 System Treatment 4 3 4 1 13 Relief Valve Maintenance and Testing 4 3 4 1 14 Domestic Hot Water System 4 3 4 1 15 Fan and gas valve removal instructions 4 4 4 1 16 Fan and gas valve re assembly instructions 4 4 5 0 TROUBLESHOOTING 5...

Page 7: ...eating does not reach the correct temperature 5 8 5 4 3 Central heating system remains too warm 5 9 5 4 4 No domestic hot water DHW 5 9 5 4 5 Domestic hot tap water does not reach the correct temperature 5 9 5 4 6 Burner ignites loudly 5 10 5 4 7 Burner resonates 5 10 6 0 DIAGRAMS 6 1 6 1 PARTS DIAGRAMS 6 2 6 2 WIRING DIAGRAMS 6 5 INSTALLATION COMMISSIONING REPORT 6 6 SERVICE RECORD 6 7 REVISION H...

Page 8: ... including those of neighbouring properties Place the exhaust outlet so it to reaches 12 minimum above the down turned intake Avoid exhaust re ingestion For sidewall venting options Both the inlet and exhaust terminations should be located on the same side of the building You can elevate both pipes in periscope style after passing them through the wall to gain required clearance above grade and sn...

Page 9: ...as usage of 4000 m3 for natural gas or 1500 m3 for propane The units are approved as Category IV vented appliances using Direct Vent sealed combustion Figures 1a and 1b show outer case dimensions and piping Use this diagram to find a suitable location for the unit See also Section 1 3 Location Figure 1a Dimensions Connections for SFC Series NOTE When using the SFC units for non domestic purposes t...

Page 10: ...xhaust Outlet 3 Schedule 40 B Combustion Air 3 Schedule 40 C Cold Domestic Water Connection 1 2 Male NPT D Hot Domestic Water Connection 1 2 Male NPT E Heating Water Inlet Return 3 4 Male NPT F Heating Water Outlet Supply 3 4 Male NPT G Gas Inlet 1 2 Male NPT H Condensate Outlet 3 4 Hose I Control Wiring Passage 7 16 Rubber Plug Table 1 Connections Bracket ...

Page 11: ...so avoid airborne chlorides such as those released with the use of laundry detergents Avoid installing the unit where water leakage may damage the area for example above carpeting If a location such as this cannot be found a suitable drain pan should be installed under the appliance Unit fastening Approximate weight for the unit is 85 lbs 39 kg For support fasteners use the two of the four supplie...

Page 12: ... two lower screws washers and anchors are field supplied 1 3 1 Mobile Home Installations Units installed in a mobile or manufactured home must conform to the local building codes WARNINGS Exposed water piping and associated components relief valves circulators etc should not be in contact with combustible materials Check local codes for required clearances and or provide adequate insulation DO NOT...

Page 13: ...l Gas and Propane Installation Code CAN CSA B149 1 or applicable provisions of the local building codes IMPORTANT When an existing unit is removed from a common venting system the common venting system is likely to be too large for proper venting of the appliances remaining connected to it When re sizing any portion of the common venting system the common venting system should be re sized to appro...

Page 14: ...rs and any other gas burning appliance to their previous conditions of use Correct any improper operation of the common venting system to ensure that the installation conforms to the National Fuel Gas Code ANSI Z223 1 latest edition In Canada all installations must conform to the current CAN CGA B149 1 Installation Code and or local codes 1 4 1 Applications All SFC series models must be installed ...

Page 15: ...option that enables units to be vented up to 120 equivalent feet from the vent termination using 3 The actual vent travel allowance is reduced for fittings in accordance with Table 3 Example For the models listed above using 6 x 90º CPVC elbows the maximum lineal measure of pipe allowed using 3 pipe is 72 feet 120 6 x 8 48 72 For 3 Flexible PPs up to 35 actual lineal feet are allowed in a nominall...

Page 16: ... bird screen of 1 4 stainless steel or plastic mesh e g IPEX System 636 drain grate for CPVC systems to guard against foreign objects Figure 4 Secure joints using appropriate solvent cement to bond the respective pipe material Canada PVC CPVC cement approved under ULC S636 in accordance with its manufacturer instructions USA PVC ASTM D2564 or PVC D2235 Use transition glue anywhere that PVC and CPV...

Page 17: ...d and hold in place with a short nipple to allow easy access for cleaning For roof top venting of multiple unit sets group all intake terminals together for a common penetration through a custom cap Alternatively place in the closest proximity achievable using commonly available pipe flashing Similarly group the exhaust pipes and place the 2 separate groups of pipes at least 3 apart the closest in...

Page 18: ...op Concentric Termination kits are approved for use with this unit For vertical roof top concentric terminations you must follow the installation instructions supplied with the venting material manufacturer Care must be taken to install the termination kit a minimum horizontal distance of 10 305cm away from any portion of the building and a minimum of 18 46cm above the roof line plus the anticipat...

Page 19: ...ination piping configuration Figure 9 Top view minimum distance of exhaust vent to inside and outside corners DIRECT VENT SIDE WALL TERMINATION KITS The Side Wall Termination kits approved for use with the SFC series units are subject to restrictions NOTE Some jurisdictions may not allow this type of side wall termination due to close proximity to the neighboring properties See Figures 10 11a and ...

Page 20: ...file termination kit Ipex 196985 3 PVC low profile termination kit Figure 10 Non Concentric kits Ipex 196984 2 PVC and 196985 3 PVC Figure 11a Horizontal Concentric Termination Two Kits Figure 11b Horizontal Concentric Termination Single Kit WARNING The vent for this appliance must not terminate 1 Over public walkways 2 Near soffit vents or crawl space vents or other areas where condensate or vapo...

Page 21: ... Side Wall Termination kits On the same horizontal line not stacked With a minimum vertical separation of 12 center to center Use caution when installing Concentric Side Wall Termination kits when the outdoor design temperature is below 5 F 15 C Possible blockage of the combustion air intake increases when the outdoor temperature drops below this temperature Approved Concentric Side Wall Terminati...

Page 22: ... combustion air inlet to any other appliance 6 in 15 cm for appliances 10 000 Btuh 3 kW 12 in 30 cm for appliances 10 000 Btuh 3 kW and 100 000 Btuh 30 kW 36 in 91 cm for appliances 100 000 Btuh 30 kW 6 in 15 cm for appliances 10 000 Btuh 3 kW 9 in 23 cm for appliances 10 000 Btuh 3 kW and 50 000 Btuh 15 kW 12 in 30 cm for appliances 50 000 Btuh 15 kW K Clearance to a mechanical air supply inlet 6...

Page 23: ...se 8 2 8 3 or 8 4 of Natural Gas and Propane Installation Code CAN CSA B149 1 or applicable provisions of the local building codes Figure 16 Direct vent combustion air intake V V V V V V V V V X X F C B D E B K M G A INSIDE CORNER DETAIL H FIXED CLOSED OPERABLE OPERABLE CLOSED FIXED B J A B B B V VENT TERMINAL X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED I L Figure 15 Vent Terminal Clea...

Page 24: ...se Schedule 40 PVC CPVC ABS or PPs piping of any type Use the same diameter as vent piping Insert combustion air piping directly into the 3 female plastic fitting on the top of the unit and run it horizontally or vertically to the outdoors We recommend using a bird screen of 1 4 stainless steel or plastic mesh eg IPEX System 636 drain grate for CPVC systems to guard against foreign objects Care mu...

Page 25: ...Condensate Trap The condensate trap cup must be installed on the drain connection at the base of the unit 1 5 2 Installing the Condensate Trap 1 Fill the condensate trap cup with water 2 Place the condensate trap cup into the condensate trap base and twist toward the right 3 Attach the drain hose to the condensate trap outlet located to the left of the condensate trap Figure 17 Condensate trap ins...

Page 26: ... and refill with water Inspect the trap and clean the interior portion of the trap attached to the unit 4 Re install the condensate trap cup and twist to the right 1 5 4 Further Installation Details Pipe the condensate drain tube to within 1 of a drain or connect it to a condensate pump Slope the drainage line down to the drain at a pitch of 1 4 per foot so that the condensate runs towards the dra...

Page 27: ... corrosion you must use a neutralization package CAUTION When a condensate neutralization package is installed the pH of the condensate discharge must be measured on a regular schedule to ensure the neutralizing agent is active and effective DANGER The water in the condensate neutralizer can cause severe burns to the skin Use extreme caution when servicing the condensate neutralizer Wear protectiv...

Page 28: ...ulti zone load applications Piping loads in parallel is only acceptable in systems where the minimum flow rate is guaranteed to be higher than the minimum for the unit and where the unit s pump is adequate to provide the required flow rate and pump head for the system Table 5 Boiler pressure drop Pump runs between 50 to 100 capacity to establish pressure difference across boiler circuit A boiler p...

Page 29: ...for closed loop hydronic systems When water quality is unknown or when chemical treatment or glycol is required you should consider other options Follow applicable Codes and good piping practice Other feed and pressurization devices on the market today may be a better choice than a raw water fill from the mains When regular maintenance requires relief valve blow off the discharge may be directed b...

Page 30: ...discharge 2 Allows complete drainage of both the valve and the discharge line 3 Is independently supported and securely anchored to avoid applied stress on the valve 4 Is as short and straight as possible 5 Terminates freely to atmosphere where any discharge is clearly visible and is at no risk of freezing 6 Terminates with a plain end which is not threaded 7 Is constructed of a material suitable ...

Page 31: ...rs The installer designer must ensure that if the integral pump is used for the space heating emitters it is powerful enough for system distribution Avoid D where an external pump is placed in series with the integral pump because the external pump runs when the SFC is serving DHW It will strongly compromise DHW response The SFC Series modulating units are designed to supply the heating load with ...

Page 32: ...on the supply side of secondary loops to facilitate air evacuation Use pumps with internal check valves to avoid ghost flows and thermal siphoning The SFC series units are designed to be piped in a primary secondary piping arrangement In some cases the unit can be piped in series with the heating load if the pump is capable of providing the flow and head the system requires For example an SFC unit...

Page 33: ...r types of automotive glycol antifreeze or undiluted antifreeze of any kind This may result in severe unit damage It is the responsibility of the Installer to ensure that glycol solutions are formulated to inhibit corrosion in hydronic heating systems of mixed materials Improper mixtures and chemical additives may cause damage to ferrous and non ferrous components as well as non metallic wetted co...

Page 34: ...ILERS SFC 99 SFC 125 Figure 27 Space heating piping concept with closely spaced tees on secondary loop Figure 26 Typical one temperature space heating piping concept with direct domestic hot water concept drawing This drawing is only a simple schematic guide ...

Page 35: ...erature space heating piping concept with domestic hot water concept drawing This drawing is only a simple schematic guide Figure 29 Air handler and direct domestic hot water parallel piping for low loss heat emitter concept drawing This drawing is only a simple schematic guide ...

Page 36: ...ALLATION AND OPERATION INSTRUCTIONS 1 28 SFC COMBI BOILERS SFC 99 SFC 125 Figure 30 Air handler and direct domestic hot water primary secondary concept drawing This drawing is only a simple schematic guide ...

Page 37: ...Manual before operating the relief valve The unit requires a pressure relief valve identified with the ASME V or HV symbol and set to relieve at or below 150psi of domestic water pressure and a minimum relieving capacity of 199 000 Btu hr with 3 4 NPT threads For safe operation of the unit the relief valve must not be removed from its designated point of installation or plugged Read and follow war...

Page 38: ... Table 6 Domestic Water Quality Guidelines 1 7 2 Domestic Hot Water Piping The domestic water piping connections are located at the bottom of the unit see Figure 1b The connections are 1 2 male NPT threads The cold water inlet is on the right side and the hot water outlet is on the left side A pressure relief valve must be installed With a maximum pressure setting of 150PSI and rated for a minimum...

Page 39: ...omestic water pressure required is 40PSI and recommended to be 50PSI or higher Generating domestic hot water with a water pressure lower than 40PSI reduces the amount of hot water generated and increases the risk of scaling in the heat exchanger The domestic water piping must be installed with isolation valves and flushing taps installed on both the cold and hot domestic connections Thermal expans...

Page 40: ...temperature rise SFC 99 2 4 GPM SFC 125 3 2 GPM CAUTION The field supplied thermostatic mixing valve may be installed on the direct domestic hot water piping connections at the unit or at the outlet of a domestic hot water storage tank if using the domestic hot water function Failure to install the thermostatic mixing valve may result in a hazardous situation which can cause serious injury or deat...

Page 41: ...f valve during any pressure testing of the gas supply piping system at test pressures equal to or greater than 1 2 psi 3 5 kPa Dissipate test pressure prior to reconnecting The gas valve is provided with pressure taps to measure gas pressure upstream supply pressure and downstream manifold pressure of the gas valve see Figure 32 Note that manifold pressure varies slightly in accordance with firing...

Page 42: ... supplied appliance plug in a separate fused circuit and on off switch within sight of the unit The unit is equipped with 3 x 1 2 electrical knock outs for control wiring located behind the power supply terminal strip The SFC series units include a factory installed and pre wired pump The pump may not be able to supply adequate flow for the heat emitter circuits A system heating pump switched thro...

Page 43: ...plex BX connector 10 Install the junction box cover Note If the junction box is installed AC power must be supplied to the SFC series boiler through the junction box Do not plug the unit in elsewhere NOTES The IBC unit like any modern appliance that contains electronic equipment must have a clean power supply and can be disabled by power surges and spikes lightning strikes and other forms of sever...

Page 44: ...rips on a low water condition the power supply to the unit is interrupted Figure 37 External Probe Type Low Water Cutoff Device 1 9 2 Power Quality and Electrical Protection In areas of unreliable power appropriate surge protectors and or power conditioning equipment should be installed to protect the unit 1 9 3 Zone Valve and Zone Pump Connections Zoning can be accomplished with either zone pumps...

Page 45: ...perate as a set point unit and operate at its design supply temperature If outdoor reset functionality and the summer shut down feature are desired connect the supplied Outdoor sensor to X13 terminals 3 and 4 The outdoor sensor is a 12KΩ thermistor type sensor The sensor should be installed On the exterior of the building on the north side So that it is not effected by any heat sources from the bu...

Page 46: ...20V X15 X15 Blower 300 0 mm 95 0 mm Notes Original wiring as supplied with the appliance must be replaced with type T wire or its equivalent The wiring for the 120V field connections to the appliance shall have a minimum size of 14 AWG and a temperature rating of at least 194 F 90 C Wire Color Code Key BK Black W White G Green BL Blue R Red O Orange V Violet Y Yellow BR Brown GY Gray 860004 01 16 ...

Page 47: ...unit pump operates for 10 seconds every 24 hours to prevent it from seizing The pump is energized 24 hours after the last call for heat and every 24 hours after that until the next call for heat The SFC series unit can generate domestic hot water in several ways The SFC series unit can be used as a tankless water heater with or without a storage tank and also with an IBC indirect water heater The ...

Page 48: ...tor F Radiator Heating Indicator G Wrench Service Reset H Return Arrow Enter Save I Numerical Display Service Display Table 9 Controller Indicators and Touch Pad 2 3 INSTALLER INTERFACE 2 3 1 Turning Appliance ON OFF To turn on the unit touch the area above the dot for 2 seconds Now only the dot is illuminated To turn off the unit touch the area above the dot for 2 seconds A dash appears to the ri...

Page 49: ...ler Menu code 15 a Master Installer Menu code 20 RF Menu code 30 See separate publication SFC controller manual for details Adjusting the Space Heating Water Temperature To access the main menu 1 Touch the area above the dot twice 2 Touch the Space Heating button 3 To change the value touch the Plus or Minus buttons 4 To save the changes touch the Return button P to the right of the screen indicat...

Page 50: ...e Plus or Minus buttons 2 To alter this value touch the Plus or Minus buttons 4 To Save the changes touch the Return button Exit without saving the changes touch the area above the NOTE The domestic hot water thermostat is adjusted to its lowest temperature position when shipped from the factory It s recommended to set the domestic hot water thermostat to 120 F 49 C as an initial setting and furth...

Page 51: ...r s heat exchanger will not maintain its domestic hot water temperature between demands for hot water Comfort Mode ON The water heater s heat exchanger is maintained at the DHW temperature ECO Comfort Mode ECO This mode operates like the Comfort Mode but has the added advantage of learning when the domestic hot water is used During the low use periods the heat exchanger is allowed to cool To switc...

Page 52: ...operly sized pump must also be installed between the unit and the indirect tank 2 6 SPACE HEATING 2 6 1 Overview The SFC series unit is designed to be installed in a primary secondary type piping system The unit comes complete with a factory installed unit pump The pump is designed to circulate heating system water through the unit s heat exchanger and primary loop piping only The building s distr...

Page 53: ...is still a call for heat or hot water the burner will turn off integral pump runs unless call is on demand DHW Service Display 1 6 After the call for heat is satisfied the unit s pump will operate for an adjustable amount of time Service Display 0 7 If the burner is on to maintain the heat exchanger temperature for DHW Comfort mode Service Display 7 8 If the burner is on for frost protection Servi...

Page 54: ...INSTALLATION AND OPERATION INSTRUCTIONS 2 8 SFC COMBI BOILERS SFC 99 SFC 125 PAGE INTENTIONALLY LEFT EMPTY ...

Page 55: ...3 1 STARTUP AND COMMISSIONING SFC COMBI BOILERS SFC 99 SFC 125 3 0 STARTUP COMMISSIONING 3 1 LIGHTING SHUTTING DOWN THE UNIT ...

Page 56: ...erate with natural gas at sea level High Fire adjustment is required only if the calorific value of the fuel is out of the normally expected range NG range 950 1100 BTU Ft3 Consult your local fuel provider for your fuel s calorific value Low fire is field adjustable but must be done with caution No mixture adjustment may be performed unless done by a qualified technician using properly functioning...

Page 57: ...ts against Table 12 High Fire If the results are outside the permitted range check the inlet pressure and confirm that the correct orifice and venturi are installed For areas of lower calorific value natural gas install the alternative orifice listed on page 3 4 4 Switch the unit to low fire by pressing the Service button and Minus buttons at the same time The unit will drop to low fire L will sho...

Page 58: ...dure must be carried out by a qualified technician 1 Ensure that the gas supply is turned off at the manual gas valve 2 Disconnect the electrical power 3 Disconnect the nut at the gas valve outlet top of the gas valve and remove the orifice and O ring 4 Insert the correct orifice into the O ring and re install into the nut at the gas valve outlet top of the gas valve and then tighten the nut 5 Res...

Page 59: ...power switch to the unit 2 Turn off the gas supply valve to the unit There is no need to drain the unit unless the unit will be exposed to freezing conditions while off 3 Remove the front cover and allow the unit to cool 4 Unplug the electrical connector at the gas valve and fan 5 Loosen the lower gas valve connection nut NOTE There is an O ring in the lower gas connection and an O ring and orific...

Page 60: ...If necessary inspect and clean the gasket mating surface 2 Place the heat exchanger cover onto the heat exchanger and loosely install the 6mm Allen bolts removed in step 6 Tighten the 6mm hex bolts in a cross pattern as shown in the Figure 45 3 Connect the gas line to the gas valve ensuring the O ring is in place Tighten the gas valve nut Ensure the upper gas valve connection is tight Re connect t...

Page 61: ...e the magnitude of clearing required and establish a reasonable burner inspection schedule Some installations may call for annual service others showing clean burners will only need attention every 2 years In alternate years visually inspect burner through the sight glass Ensure the flame is stable and without excessive fluttering Normal flame pattern is evenly distributed over the burner surface ...

Page 62: ...ot run up toward 30 psig at high temperature If pressure rises sharply consider replacement of the expansion tank Check also for noise at high fire that may signal water quality problems Water chemistry must be of a quality generally accepted as suitable for hydronic applications See Section 1 6 for details Ensure that any direct city fill water connections are left in the closed position to minim...

Page 63: ...essurize your system Capture the discharged fluid in a container and recycle it by returning it to the system feeder unit This is particularly important when your system contains treatment chemicals or glycol solutions If the system employs plain water turn on the unit s auto fill valve to recharge the lost fluid 4 1 14 Domestic Hot Water System Quality of the domestic cold water is very important...

Page 64: ...e items in a safe place for re installation 6 If the removed fan is to be re installed ensure the fan and venturi are clean and dust free 4 1 16 Fan and gas valve re assembly instructions 1 Place the fan gasket on the outlet of the fan housing The gasket has 2 locator pins to ensure the gasket does not move during installation 2 Place the check valve on the fan gasket and attach the fan to the bur...

Page 65: ...Heating 5 4 6 Indoor Temperature Does Not Reach Desired Temperature 5 4 7 No Hot Water DHW 5 4 8 Hot Water Does Not Reach Temperature Below each section is a list of symptoms diagnoses and solutions Some diagrams see Section 6 0 are included for use with troubleshooting including Electrical Wiring Diagrams Unit Component Layout Diagrams 5 1 PRELIMINARY CHECKS As a first step in troubleshooting you...

Page 66: ...o the sensor as damage may result 12KΩ temperature sensors are supplied with the unit See Table 15 for resistance values SENSOR TYPE PURPOSE LOCATION S0 NTC 12KΩ Heat Exchanger Temperature Upper Left of Heat Exchanger S1 NTC 12KΩ Heating Supply Temperature Heating Supply Pipe S3 NTC 12KΩ Domestic Hot Water DHW Supply Pipe S7 NTC 10KΩ Hot Water Tank External Water Heater S6 NTC 12KΩ Outdoor Sensor ...

Page 67: ... rate When the water pressure is less than 8psi the unit restricts its firing rate If the pressure is less than 4psi then the unit will not fire at all To test the operation of the pressure sensor type LWCO 1 Turn off the unit at the controller by pressing the area above the dot The current system pressure is displayed 2 Isolate the space heating circuit and reduce the water pressure The displayed...

Page 68: ...rn off the cold and hot water valves below the unit release the water pressure and then drain the domestic hot water circuit Leave the drain valves open 5 2 7 Domestic Hot Water Sensor The SFC Series units are equipped with a domestic hot water temperature sensor The sensor is surface mounted located on the hot water outlet pipe 5 2 8 Outdoor Sensor An outdoor sensor is supplied with each unit The...

Page 69: ...TEMPERATURE RESISTANCE F C Ω F C Ω 0 18 85 362 100 38 5 828 5 15 72 918 105 41 5 210 10 12 62 465 110 43 4 665 15 9 53 658 115 46 4 184 20 7 42 218 120 49 3 760 25 4 39 913 125 52 3 383 30 1 34 558 130 54 3 050 35 2 29 996 135 57 2 754 40 4 26 099 140 60 2 490 45 7 22 763 145 63 2 255 50 10 19 900 150 66 2 045 55 13 17 436 155 68 1 857 60 16 15 311 160 71 1 689 65 18 13 474 165 74 1 538 70 21 11 8...

Page 70: ...ow Check whether heating supply temperature sensor S1 is installed correctly Check for the correct operation of heating supply temperature sensor S1 Replace the heating supply temperature sensor S1 F002 Temperature too high during DHW demand Check wiring of domestic hot water sensor S3 for breakage shutdown Check whether domestic hot water sensor S3 is installed correctly Check for the correct ope...

Page 71: ...rectly Mount the sensor correctly F016 Mounting fault S3 Domestic hot water sensor S3 is not mounted correctly Mount the sensor correctly F018 Flue and or air supply duct is blocked Check the flue and the air supply duct Clean the flue and or the air supply duct F019 Boiler Memory Module BMM fault Check BMM wiring for breakage shutdown Replace the BMM F027 Short circuit of outdoor sensor S6 Check ...

Page 72: ...es Check the wiring according to the schematic Check Connector X13 5 4 2 Central heating does not reach the correct temperature POSSIBLE CAUSES ANALYSIS POSSIBLE SOLUTION Water pressure in the system is too low Yes No Top up the system Room thermostat is not calling for heat Yes No Check the setting and adjust it if necessary Temperature is set too low Yes No Increase the central heating temperatu...

Page 73: ... 5 gpm Yes No Increase the domestic hot water flow Domestic hot water sensor S3 is defective Yes No Replace the domestic hot water sensor S3 No electricity on the flow sensor 5V DC Yes Check the wiring according to the schematic CK THE WIRING ACCORDING TO THE SCHEMATIC 5 4 5 Domestic hot tap water does not reach the correct temperature POSSIBLE CAUSES ANALYSIS POSSIBLE SOLUTION Domestic hot water ...

Page 74: ...Ignition distance is incorrect Yes No Replace the ignitor including the ignition cable Gas air control is not correctly adjusted Yes Check and or replace the ignition cable Replace the ignition unit in the top cover Replace the ignitor 5 4 7 Burner resonates POSSIBLE CAUSES ANALYSIS SOLUTION Gas inlet pressure lower than 5 w c or sometimes disappears Yes No The home pressure regulator may be defec...

Page 75: ...6 1 DIAGRAMS SFC COMBI BOILERS SFC 99 SFC 125 6 0 DIAGRAMS 6 1 PARTS DIAGRAMS 6 2 WIRING DIAGRAMS ...

Page 76: ...ONS 6 2 SFC COMBI BOILERS SFC 99 SFC 125 6 1 PARTS DIAGRAMS Diagram 6 1 1 Unit assembly parts SFC Series modulating unit Parts assembly For information on the contents of P kits visit the Technical Information portal at www ibcboiler com ...

Page 77: ... Gasket 150 312 Flue Pipe Outlet Gasket 150 313 90 Flue gas temperature sensor 180 205 P 814 NTC shaft 1 8 SW15 150 314 100 Ignitor and cable 240 115 P 815 110 Ignitor gasket 250 622A1 120 Burner 180 114 P 712 130 Burner gasket 250 646A1 Screws x 4 150 344 Spring 150 241 O ring 150 343 140 Backflow valve 180 178 P 817 Backflow valve flapper viton 180 184 150 Fan gasket 250 627A1 P 818 160 Fan 240 ...

Page 78: ... P 839 Alternative low calorific Natural Gas Orifice SFC 125 490 180 266 P 840 260 Supply pipe cold 180 240 P 826 DHW Flow sensor housing propeller 180 241 P 827 270 DHW Flow Sensor 240 122 P 849 280 DHW supply pipe 190 219 P 828 290 DHW temperature sensor 240 070 P 729 300 Heat exchanger refractory plate 170 118 P 883 310 Heat exchanger 180 225 No replacement Heat exchanger gasket 255 073 320 Sup...

Page 79: ...X1 X2 X2 X3 X3 X4 X4 X5 X5 X8 X8 X9 X9 X14 X14 Power Plug 120V X15 X15 Blower 300 0 mm 95 0 mm Notes Original wiring as supplied with the appliance must be replaced with type T wire or its equivalent The wiring for the 120V field connections to the appliance shall have a minimum size of 14 AWG and a temperature rating of at least 194 F 90 C Wire Color Code Key BK Black W White G Green BL Blue R Re...

Page 80: ...3 of Installation and Operating Instructions Leak testing completed gas piping venting system Fan and combustion components System Cleaned and Flushed type of cleaner used ________________________________________________ System Filled type concentration of any glycol chemicals used _______________________________________ Air purge completed Relief Valve correctly installed and piped Relief valve t...

Page 81: ...SERVICE RECORD DATE LICENSED CONTRACTOR DESCRIPTION OF WORK DONE ...

Page 82: ...ame function THIS OVERRIDE MUST NOT BE USED UNLESS AT LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE An external energy management system is installed that reduces the unit s water temperature as the heating load decreases This unit is not used for any space heating This unit is part of a modular or multiple unit system having a total input of 300 000 BTU hr or greater This unit is equipped with a ...

Page 83: ...rences to maintaining the units R3 JUNE 2019 Updated drawings and made minor textual changes R4 NOVEMBER 2019 Concept drawings and tables on water quality R5 MARCH 2020 Updated table 5 figures 1b 2 36 and 45 R6 AUGUST 2020 Updated part descriptions and numbers specification table Figure 28 and 29 minor textual changes ...

Page 84: ...J 5M8 Toll Free 1 844 432 8422 Tel 604 877 0277 Fax 604 877 0295 www ibcboiler com 120 236 R6 84100406 August 2020 IBC Technologies Inc 2020 IBC Technologies USA Inc 1702 Taylors Lane Cinnaminson NJ 08077 USA Tel 856 887 0544 Fax 856 735 5584 www usa ibcboiler com ...

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IBC SFC-125, Installation And Operating Instructions Manual

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