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Finned copper tube gas boilers & water heaters – Boiler Manual

27

F

F

Ignition Trial: 

1.  Once energized, the fl ame sense module (FSM) initiates 4 sec-

ond diagnostic cycle before sending 24V ac to the PV terminal 
and energizing the ignition transformer. 

2. Th e fl ame failure LED will be lit during the 4 second diagnostic 

cycle unless the unit is confi gured for CSD-1. When the PV 
terminal energizes, the LED will turn off . If the ignition trial 
fails, the LED will relight.

3. Th e pilot valve and ignition transformer are energized for the 

10 second ignition trial. Th e pilot indicator light illuminates 
during this time.

4.  If the ignition att empt is unsuccessful, the ignition module will 

retry in 5 minutes.

5.  Since the staging controller remains powered, it will continue 

to stage up for as long as the call for heat exists. Th e blower, 
pump and power venter will remain for as long as a call for heat 
exists.

6.  If the second ignition att empt is unsuccessful the gas valves will 

lockout, but the blower, pump and power venter will remain 
on. To reset the boiler/water heater, take one of the following 
steps:
•  Adjust the high limit down below the point at which the 

blower shuts down, then reset the limit to its normal sett ing.

•  Remove power from the boiler/water heater, wait 30 seconds 

and re-establish power to the unit.

Main Burner:

1.  Once the pilot is proved the MV terminal on (FSM) is energized 

sending 24V ac to the main gas valve.

2. Th e main gas valve opens via action of K1.
3. Th e main burner indicator light illuminates. Th e PV terminal 

remains energized and the pilot indicator remains on.

Normal Operation

•  Staging will be controlled from the staging controller.
• Th e front control panel separately monitors limit, gas pressure, 

water fl ow and air fl ow.

•  If staging changes during operation, blowers, pres-sure switches 

and gas valves will be switched or turned off  as required.

•  Stage 1 will be on fi rst, last and whenever the boiler operates. 

  For a change from stage 2 to 3 or 3 to 4, 10 second 

DOM time delays were added to the pressure switch 
switching circuits (TDR2 and TDR3). Th e time delays 
provide hold states that allow the blowers to reach full 
speed and close the high fi re pressure switches before 
they are energized to confi rm proper air fl ow.

Demand Satisfi ed:

1.  Stage switch 1 opens, TDR1 de-energizes.
2.  Power is removed from ignition module, blowers and power venter.
3.  All indicators (except power) off .
4.  Staging controller initiates a pump purge for 20 or more seconds, 

depending on the inlet/outlet temperatures and ∆T sett ing in 
the controller. Th e pump then shuts off .

Staging Control Alarms:

1.  Staging control alarms are visible on the controller's LCD screen. 

See the staging control documentation for details. 

2.  A powered alarm contact (2A max @ 24 VAC) is available to 

provide an audio or visual indication of faults related only to 
staging control operation. Th is contact is wired to the junction 
box for optional remote indication. Refer to the 4 stage wiring 
diagram for tie-ins. 

High Limit, Low Water Flow, Low Gas Pressure, High Gas 
Pressure, Power Venter Interlock Faults

1.  All gas valves, the blowers and power venter will de-energize if 

either alarm is tripped.

2. Th e manual reset high limit can be reset through a knockout 

accessible in the left  side jacket panel.

3.  Condition indicators are visible on the control panel.

Low Air (Blocked Flue/Air Inlet)

•  One of two pressure switches will monitor the airfl ow of each 

blower.

•  Air monitoring will begin at prepurge. 
•  If a low air condition is present on the left  side, power will not be 

supplied to the module. Th e blowers will remain on and the low 
air indicator will remain on for as long as a call for heat exists.

•  If a low air condition is present on the right side, power will not 

be supplied to the right gas valve.

•  A low air indicator for each boiler side is visible on the control 

panel.

Summary of Contents for DOMINATOR Series

Page 1: ...on dust and particulate particularly drywall dust will cause contamination of the burner resulting in possible severe personal injury death or substantial property damage The boiler can only be operat...

Page 2: ...ion or in the absenceofsuchrequirements totheNationalFuelGasCode ANSI Z223 1 NFPA 54 latest revision Where required by the authority having jurisdiction the installation must conform to the Standard f...

Page 3: ...a chimney or outside wall and have adequate fresh air for combustion Ensure that the boiler water heater is level from front to back and from side to side Use metal shims to level the boiler water hea...

Page 4: ...ts of all such devices Never operate the Dominator in an environment subjected to a negative pressure unless the air intake is connected to the outdoors Failure to comply with this warning can result...

Page 5: ...F Figure 2 Vertical Venting using a Masonry Chimney and Inside Air Figure 3 Horizontal Venting using Inside Air 1 5 FT 0 5 m 1 4 IN PER F00T 20 mm m 305 TO 457 127 TO 254 VENT PIPE DIAMETER 5 TO 10 1...

Page 6: ...s sectional area of not less than 1 in2 per 7 000 Btuh 310 mm2 per kW up to and including 1 million Btuh plus 1in2 per14 000Btuh 155mm2 perkW inexcessof1million Btuh Intake Air Option General Guidelin...

Page 7: ...e or multiple units exhaust and combustion air terminals must be installed on the same plane outside wall in order to prevent pressure differences due to prevailing winds In cold climates double wall...

Page 8: ...mbustion Air and Venting Metal Chimney System Shown Locate exhaust terminal downwind from air intake to reduce potential for flue gas recirculation Figure 7 Combination Air Intake and Venting Masonary...

Page 9: ...ype To avoid spillage into the room of dangerous flue gas containing carbon monoxide the opening in damper must never face against the flow of flue gas VENT SYSTEM OPTIONS The Dominator may be vented...

Page 10: ...at a minimum rate of 1 4 in ft 20 mm m On masonry chimneys the connector must terminate flush with the inside of the chimney flue Figure 2 Fasten each single wall vent connection with at least 3 corro...

Page 11: ...ymustbesupported at3ft 0 9 mintervalswithoverheadhangers Theventsystemmust be pitched down toward the vent terminal 1 4in ft 20 mm m If anypartofasinglewallmetalventsystempassesthroughanunheated space...

Page 12: ...agrosseretl inclinaisonhorizontalequiconviennent ets assurerquelesyst meestexemptd obstruction d tranglement de fruite de corrosion et autres d faillances qui pourraient pr senter des risques c Insofa...

Page 13: ...ce F du National Fuel Gas Code ANSI Z223 1 NFPA 54 et ou des codes d installation CAN CGA B149 GENERAL PIPING REQUIREMENTS Improper piping of this boiler water heater will void themanufacturer swarran...

Page 14: ...4 0 0 22 2 1 0 6 400 45 4 0 49 2 9 1 5 600 68 1 1 30 4 3 3 8 750 85 1 2 35 5 4 6 9 900 102 1 3 84 6 4 11 3 1050 119 1 6 23 7 5 18 4 T 20 F T 11 1 C Model Flow Rate Pres Drop Flow Rate Pres Drop Number...

Page 15: ...trol thermal expansion must be installed in the heating system An expansion tank must be installed close to the boiler on the suction side of the pump An air scoop and automatic air vent must also be...

Page 16: ...ized to boiler design flow requirements 3 All boilers furnished with factory mount ed outlet water temperature gauge 4 Boiler pump purging required Use termi nals supplied Notice These drawings show s...

Page 17: ...otice These drawings show suggested piping configuration and valving Check with local codes and ordinances for specific requirements Adjustment Procedure To Maintain Inlet Temperature Above Dew Point...

Page 18: ...solved solids not exceeding 350 ppm Water having a hardness less than 8 grains can cause excessive errosion of the heat exchanger Waterthathasahardnessgreaterthan18grainspergallon and or a level of di...

Page 19: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 19 F F Table 8A Dominator Heat Exchanger Selection Graph Table 8B Dominator Pumping Performance Requirement...

Page 20: ...rvoidingthewarranty Themethodoutlined below can be employed to prevent this condition from occurring A balancing valve should be installed on the outlet side of the water heater for purposes of adjust...

Page 21: ...e making selection 6 Common piping must be sized for maximum combined heater flow 7 Hot water tanks should be equipped with a combination temperature pressure relief valve 8 MA Code requires an 1 8 ho...

Page 22: ...y Maximum pipe capacity in ft3 hr based on 0 60 specific gravity gas at a pressure of 0 5 psig or less and a 0 3 WC pressure drop Nominal Iron Pipe Size in Pipe length in feet 10 20 30 40 50 60 80 100...

Page 23: ...y understand the instructionscontainedinthismanual Donotattempt to operate this boiler water heater if it has not been installed in accordance with the guidelines set forth in this manual Failure to c...

Page 24: ...ever the boiler water heater is in operation Consult the staging controller documentation for further information on controller operation For the D1050 D2100 the air inlet plenum is divided into left...

Page 25: ...ule No Power to Right Valve 3 No Power to Ignition Module Low Right Valve 4 No Power to Ignition Module High Right Valve OPERATION SEQUENCE 2 STAGE D300 THROUGH D900 On Models D1050 2100 2 stage facto...

Page 26: ...n for details 2 A powered alarm contact 2A max 24 VAC is available to provide an audio or visual indication of faults related only to the staging control s operation This contact is wired to the junct...

Page 27: ...sure switches and gas valves will be switched or turned off as required Stage 1 will be on first last and whenever the boiler operates For a change from stage 2 to 3 or 3 to 4 10 second DOM time delay...

Page 28: ...ousservirdest l phones se trouvant dans le b timent Appelez imm diatement votre fournisseur de gaz depuis un voisin Suives les instructions du fournisseur Si vous ne pouvez rejoindre le fournisseur ap...

Page 29: ...site requirements Table 19 Pilot Manifold Settings Natural Gas inches W C mm W C Low Fire 1 5 02 33 5 High Fire 2 5 0 2 63 5 LP Gas inches W C mm W C Low Fire 3 9 0 2 99 5 High Fire 9 3 0 2 236 5 Tabl...

Page 30: ...s by more than 5 from the rated input value of the unit adjust the manifold pressure accordingly DO NOT adjust the manifold pressure by more than 5 If a properratecannotbemaintainedwithoutadjustingthe...

Page 31: ...ermal radiation or in a drafty area will cause poor or sporadic heating For a thermostat that employs an adjustable heat anticipator adjust the anticipator to match the current measured in the thermos...

Page 32: ...or is required to properly control the system supply primary loop temperature The firing stages are operated to provide a setpoint temperature in the primary loop SETPOINTOPERATION Thecontroloperatest...

Page 33: ...echnician in accordance with all applicable localandnationalcodes Improperservicingoradjust ment can damage the boiler water heater Theceramiccombustionchambercontainscrystalline silica Wear a tightly...

Page 34: ...1 4 inch nuts and washers holding the upper com bustion chamber front panel in place and carefully remove it 9 Carefully slide the heat exchanger out of the unit 10 Remove the V baffle straps and V ba...

Page 35: ...weep or discharge water at normal system pressure If it does contact a qualified service technician to have it inspected NEVER try to clean or repair the relief valve If the valve fails to operate pr...

Page 36: ...nter contact not wired Wire power venter contact to J box Power venter not wired to external power Wire power venter as shown in connection diagram Relay fault Replace relay Power venter fault Replace...

Page 37: ...lace main valve s Insufficient Heating Target temperature too low Increase stage control target temperature Primary safety high limit set too low Increase limit setting Unit Consistently Shuts Down Pr...

Page 38: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 38 F F Figure 23 Replacement Parts RIOM 22 REV B REPAIR PARTS...

Page 39: ...2723 1 70 2724 1 70 2725 1 Jacket Lower Front Panel SS 70 2716 1 1 70 2717 1 1 70 2718 1 1 70 2719 1 1 70 2720 1 1 70 2721 1 1 70 2722 1 1 70 2723 1 1 70 2724 1 1 70 2725 1 1 Handle 20 0050 1 1 1 1 1...

Page 40: ...1 1 1 1 Jacket Right Panel SS 03 1823 1 1 1 1 1 03 1825 1 1 1 1 1 1 1 7 Combustion Air Inlet Assembly Indoor 70 2744 1 1 70 2746 1 1 70 2748 1 1 70 2749 1 1 1 1 Combustion Air Inlet Assembly Outdoor 7...

Page 41: ...07 1 03 1808 1 03 1809 1 03 1810 1 Jacket Top Panel SS 03 1801 1 1 03 1802 1 1 03 1803 1 1 03 1804 1 1 03 1805 1 1 03 1806 1 1 03 1807 1 1 03 1808 1 1 03 1809 1 1 03 1810 1 1 Jacket Top Panel Outdoor...

Page 42: ...se Panel 03 1974 1 03 1975 1 03 1976 1 03 1977 1 03 1978 1 03 1979 1 03 1980 1 03 1981 1 03 1982 1 03 1983 1 Cerablanket Insulation 05 0103 3 4 4 6 6 8 10 10 10 10 Manning Glass Insulation per square...

Page 43: ...771 1 1 1 1 1 1 1 1 1 1 19 Heat Exchanger Guide Rail 03 1938 4 4 4 4 4 4 4 4 4 4 20 Combustion Chamber Rear Panel 03 1904 1 03 1905 1 03 1906 1 03 1907 1 03 1908 1 03 1909 1 03 1910 1 03 1911 1 03 191...

Page 44: ...03 1 05 0204 1 05 0205 1 05 0206 1 05 0207 1 05 0208 1 05 0209 1 05 0210 1 05 0211 1 26 End Refractory Panel Right 05 0058 1 1 1 1 1 1 1 1 1 1 End Refractory Panel Left 05 0107 1 1 1 1 1 1 1 1 1 1 28...

Page 45: ...and fittings 70 2896 1 1 1 1 1 1 1 1 1 1 NS Burner Gasket 06 0020 4 6 8 10 12 14 18 20 26 28 NS Burner Support Rail 03 2090 1 03 2091 1 03 2092 1 03 2093 1 03 2094 1 03 2095 1 03 2096 1 03 2097 1 03...

Page 46: ...0 2845 1 Heat Exchanger Assembly Cupronickel 70 2856 1 Bronze Headers 70 2857 1 70 2858 1 70 2859 1 70 2860 1 70 2861 1 70 2862 1 70 2863 1 70 2864 1 70 2865 1 32 Tube Bundle Copper 70 2901 1 70 2902...

Page 47: ...E DB 14 0112 1 1 1 1 1 1 1 1 1 1 High Limit L4008E DW 14 0105 1 1 1 1 1 1 1 1 1 1 NS Operator T6031A pool heater Canada Only 14 0003 1 1 1 1 1 1 1 1 1 1 44 Firing Valve 3 4 11 0461 1 1 Firing Valve 1...

Page 48: ...lve 50 30 0379 1 1 Pressure Relief Valve 125 13 0009 1 1 1 1 1 1 1 1 1 1 NS Tridicator DB 30 50 psi 13 0308 1 1 1 1 1 1 1 1 1 1 Tridicator DB 60 160 psi 13 0305 1 1 1 1 1 1 1 1 1 1 NS Flow Switch 14 0...

Page 49: ...300 400 600 750 900 1050 1350 1500 1950 2100 NS Barometric Damper 6 09 0405 1 1 Barometric Damper 7 09 0409 1 Barometric Damper 8 09 0404 1 Barometric Damper 10 09 0403 1 1 Barometric Damper 12 09 04...

Page 50: ...bottom of the electrical panel Disable any external call for heat and toggle the remote local switch to REMOTE 1 Toggle the LOW FIRE switch to cycle the boiler then hold at trial for pilot ignition 2...

Page 51: ...E DELTA T BETWEEN THE HEATER INLET AND OUTLET IS CRITICAL TO PROPER FLOW BEFORE YOU LEAVE THE JOBSITE YOU MUST RECORD THE DELTA T THIS READING SHOULD NOT EXCEED 35 F 19 4 C NOR BE LOWER THAN 20 F 11 2...

Page 52: ...terminal for the horizontally vented gas fueled heating appliance or equipment The sign shall read in print size no less than one half 1 2 inch in size GAS VENT DIRECTLY BELOW KEEP CLEAR OF ALL OBSTRU...

Page 53: ...bes caused by high water velocity through the tubes and is not covered by the manufacturer s warranty See Installation Instructions for proper pump performance Chemical corrosion no corrosive chemical...

Page 54: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 54 F F...

Page 55: ...Fi d b b il h B il M l Finned copper tube gas boilers water heaters Boiler Manual 55 F F...

Page 56: ...t 2008 Mestek Inc 260 North Elm Street 7555 Tranmere Drive Westfield MA 01085 Mississauga Ontario L5S 1L4 Canada Phone 413 568 9571 Phone 905 670 5888 Fax 413 568 9613 Fax 905 670 5782 www rbiwaterhea...

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