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INSTALLATION

1. GAS SUPPLY PIPING

•

Check that the gas supply meter has suffi-
cient capacity for the full input of the unit
and any other appliances on the meter.

•

Refer to Table 2 & 2A page 20 for rec-
ommended gas piping.

•

Support gas piping with hangers, not by
the heater or its accessories.

•

Purge all air from gas supply piping.

•

Before placing the combination heater
into operation check the unit and its gas
connections for leaks.

- Close manual main shut-off valve

during any pressure testing at less
than 13”W.C.

- Disconnect heater and gas valve from

gas supply piping during any pres-
sure testing greater than 13”W.C.

Do not check for gas leaks with an open
flame - use bubble test. Failure to use
bubble test or check for gas leaks can
cause severe personal injury, death or
substantial property damage.

•

Use pipe dope compatible with natural
and/or propane gas. Apply sparingly

only to male threads of pipe joints so
that pipe dope does not block gas flow.

Failure to apply pipe dope as detailed
above can result in severe personal
injury, death or substantial property
damage.

Natural Gas:

1. Refer to Table 2 page 20 for pipe length

and diameter. Based on rated combina-
tion heater input (divide input by 1,000
to obtain cubic feet per hour).

2. Inlet pressure at gas valve inlet: maxi-

mum 14”W.C, minimum 5”W.C.

3. Install 100% lock-up gas pressure regu-

lator in supply line if inlet pressure
exceeds 14”W.C. Adjust for 13”W.C.
maximum.

WARNING

Manual Shut off valve

1" x 1" 3/4" Tee

Pipe Cap

Burner gas train

Male union 3/4" NPT

Pressure gauge port

(1/8" NPT plugged)

Direction of flow

3" Minimum

Fig. 17

Содержание HM G-25

Страница 1: ...ase III HM Series G 25 G 30 Gas Fired Forced Draft with Optional Sealed Combustion Combination Heaters If the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or death For Your Safety Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS D...

Страница 2: ...ting through cold area 6 Direct venting procedures 7 Piping the combination heater 9 Thermal expansion 9 Air vent 9 Temperature and pressure relief valve 9 Pressure relief valve 9 Water hammer 9 General piping 10 Inner tank domestic piping 10 Outer tank system piping 10 Domestic piping diagram 11 Primary piping near appliance piping 12 Space heating piping diagram 13 Combination heater wiring 14 W...

Страница 3: ...y 24 Pressure relief valve and T P relief valve 24 Antifreeze 24 Air vent 25 Periodical maintenance 25 Combustion chamber 25 Draining the combination heater 25 Drain outer tank 25 Drain inner tank 25 26 Space heating system contains sufficient anti freeze 28 SPECIFICATION DATA Dimensional drawing 27 Dimensional data 28 Performance 28 PARTS LIST Parts List 29 SAMPLE SPECIFICATION Sample specificati...

Страница 4: ...o prevent damage to inner tank installer must Fill inner tank prior to outer tank during start up Relieve primary system pressure below 15 psig prior to draining inner tank CAUTION WARNING DANGER DANGER PRODUCT SAFETY INFORMATION Indicates the presence of a hazardous situation which if ignored will result in death serious injury or substantial property damage Indicates a potentially hazardous situ...

Страница 5: ...ostatic mixing valve for the lowest temperature which sat isfies your hot water need This will also provide the lowest operating cost Adjusting the water temperature Setting the knob to a lower temperature will not have an immediate effect The stored hot water will first have to be used Further adjustments may be necessary as you use your Phase III Combination Heater System Protection must be take...

Страница 6: ...hould be installed in accordance with National Fuel Gas Code ANSI Z223 1 For installations in Canada CGA B149 Installation Code for Gas Burning Equipment All electrical wiring including grounding of the heater must be in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 The HM G Series combination heaters are exempted fromASME SectionVIII 1...

Страница 7: ...cted to the outdoors or if connected to the out doors through vertical ducts 1 square inch free area per 4 000 BTU H total input b If opening is connected to the outdoors through horizontal ducts 1 square inch free area per 2 000 BTU H total input 3 Ducts when used shall have the same cross sectional area as the free area of the openings to which they are connected The minimum dimension of a recta...

Страница 8: ...doors in an area with above freezing temperatures The combination heater should be located so that any leakage from the tank or water connections will not cause damage to the area adjoining the combination heater or to lower floors in the structure When such a location is unavoidable a suitable drain pan with adequate drainage should be placed under the combination heater The pan must not restrict...

Страница 9: ...are used support with appropriate hangers To prevent blockage do not vent into bottom of chimney Vent pipe must not go beyond inside wall of chimney Vent passing through floors or ceil ings must be firestopped Outside chimney one or more walls exposed to outside Can be used for chimney draft vent ing only when lined with corrosion resistant metal liner Provide con densation drain Size liner per AN...

Страница 10: ... minimum 6 Direct sidewall vent termination Masonary walls make a 3 1 2 to 4 inch diameter hole Combustible material requires 7 inch hole Make sheet metal plate with 3 inch hole to cover opening Must be in the same pressure zone i e same outside wall as the com bustion air inlet 7 INSTALLATION Total length for 3 AL29 4C Venting System and 3 Combustion Air Inlet vs number of elbows Maximum length f...

Страница 11: ...rance Vent Termination Direct Venting thru Combustible Wall INSTALLATION TriangleTube Air Intake Size Vent Per ANSI Z 223 1 Flashing with Collar Vent Cap TriangleTube Inside Chimney Air Intake Pitch up 1 4 Ft Seal Tight Increaser connection size per ANSI Z 223 1 Draft Venting Through the Roof Draft Venting through Inside Chimney Fig 4 Fig 5 Fig 6 ...

Страница 12: ... P relief valve and discharge line T P relief valve discharge piping must not be excessively long Using more than 2 elbows or 15 feet of piping can reduce discharge capacity directly connected to a drain Terminate discharge piping within 6 from floor Refer to local codes plugged reduced or restricted subjected to freezing Do not install any valve betweenT P relief valve and tank connection or on T...

Страница 13: ...ion heater The mixing valve must remain mounted on the domestic hot water outlet at all times Removal of automatic mixing valve from combination heater will result in severe personal injury or death For recommended domestic water pip ing arrangement see Fig 7 page 11 For recommended domestic water pip ing with recirculation see Fig 8 page 11 To prevent potential scalding hazard recircu lation must...

Страница 14: ...aquastat 8 Domestic drain valve 9 Vacuum breaker if code permitting Note All shut off valves shown in this figure must be shut when siphon draining the combination heater Note All shut off valves shown in this figure must be closed when siphon draining the combination heater Re attach valve handle when draining inner tank Re attach valve handle when draining inner tank 11 Donotuseautomotive ethyle...

Страница 15: ...em 2 1 From system 2 3 4 2 Cold water fill Primary Piping Near Appliance Piping Piping with diaphragm type expansion tank Piping with closed type expansion tank 1 Circulator 2 Manual shut off valve 3 Expansion tank 4 Auto fill valve Piping with diaphragm type expansion tank alternate circulator location Fig 9 Fig 9A Fig 9B ...

Страница 16: ... Zone Valve 1 Ciruclator 2 Manual shut off valves 3 Flow check valve 4 Zone valve Note See page 12 for near appliance piping Install balancing valves to adjust flow to distribute heat to all zones Size primary manifold for total flow of all ciculators Size each circulator to individual circuit requirements Install balancing valves to adjust flow to distribute heat to all zones ...

Страница 17: ...installed by others Remove factory jumper and use terminal 9 10 WARNING Equipment Ground On Off Switch 120 VAC Circulator Blower Manual Reset Limit Auto Reset Limit LWCO Secondary T stat Primary T stat Room T stat Snap set Air Switch Ignition Control see Fig 18 3 Port Valve Snap set All wiring must comply with the National Electrical Code and additional national state or local code requirements Fo...

Страница 18: ...BK R G 120 V Supply Field Wire Factory Wire Harness H G N BK G W Factory wired Domestic priority will not provide heat to the sytem Maximum domestic performance Fig 13 Circulator wiring domestic priority Fig 14 Power supply wiring high voltage ...

Страница 19: ...stat Snap Set Circulator Zone 1 Thermostat zone 1 Honeywell R845A Relay 120 H VAC N 2 T T 1 4 3 6 Circulator Zone 2 Thermostat zone 2 Additonal zones may be added as shown above 5 C 1 INSTALLATION Fig 15 Field wiring with zone circulators ...

Страница 20: ... Snap Set H H High Voltage 120 V A C 24 V A C Room Thermostat Room Thermostat Zone 1 Zone 2 Additional zones Additional zones may be added as shown above Transformer Power Zone Valve Zone Valve Isolation relay 1 C 4 Wire Zone Valve 3 Wire Zone Valve Fig 16 Multiple zone field wiring using zone valves Use isolation relay on 3 wire zone valve with non isolated end switch Transformer and combination ...

Страница 21: ...bubble test or check for gas leaks can cause severe personal injury death or substantial property damage Use pipe dope compatible with natural and or propane gas Apply sparingly only to male threads of pipe joints so that pipe dope does not block gas flow Failure to apply pipe dope as detailed above can result in severe personal injury death or substantial property damage Natural Gas 1 Refer to Ta...

Страница 22: ...1 1 4 1 1 2 10 132 278 520 1050 1600 20 92 190 350 730 1100 30 73 152 285 590 860 40 63 130 245 500 760 50 56 115 215 440 670 75 45 93 175 360 545 100 38 79 150 305 460 150 31 64 120 250 380 Table 2 Gas piping sizing natural gas For additional piping schedules see ANSI Z223 1 Canadian installations must comply with CAN CGA B149 1 or B149 2 Installation Code ...

Страница 23: ... will stop escaping and vent will close If air vent does not seat proper ly i e water leaks out remove cap A Briefly push in valve B and release it to clean valve seat Screw cap A on completely then unscrew one turn 6 If antifreeze is used in primary water ensure concentration never exceeds a 50 50 ratio Primary water including additives must be practically non toxic having a toxicity rating or cl...

Страница 24: ...are small Lack of combustion air Yellow tip ping on flames 4 SYSTEM PIPING Check sytem piping for leaks if found repair immediately 5 VENTING SYSTEM Check the gas tight seal at all vent connection COMBINATION HEATER START UP 12 13 Inlet Outlet Gas Control Knob Pilot Outlet Honeywell VR 8304M Honeywell S8610 Fig 18 Intermittent pilot combination Gas Valve Electronic Ignition Control See Fig 12 ...

Страница 25: ...ns To Turn Off Gas To Appliance and call your service technician or gas supplier FOR YOUR SAFETY READ BEFORE OPERATING WARNING The following instructions must be followed exactly a fire or explo sion may result causing property damage personal injury or loss of life 1 Set the system thermostat to lowest setting 2 Open front jacket panel and turn ON OFF switch to OFF 3 To turn unit OFF follow step ...

Страница 26: ...s the minimum domestic water storage tem perature 1 SETTING THE COMBINATION WATER HEATER TEMPERATURE LIMITS a See Figs 19 and 20 for recommended setting 2 SETTING DOMESTIC WATER TEMPER ATURE HOT WATER REPRESENTS A SERI OUS SAFETY HAZARD DUE TO THE POTENTIAL OF SCALDING A thermostatic mixing valve is REQUIRED in the domestic hot water outlet that would allow the domestic water to be supplied at a l...

Страница 27: ...t the lever handle and permit water to discharge for several seconds If after closing the valve the valve fails to completely reset and water continues to flow shut OFF power to the heater and follow the draining procedure Partially drain the inner tank and replace the T P relief valve If T P weeps periodically it may be due to thermal expansion see Thermal Expansion page 9 Pressure relief valve L...

Страница 28: ...valves pipes and fittings for leaks Check functions of field installed controls see control manufacturer s installations Check thermostatic mixing valve per enclosed manufacturer s installation and maintenance instructions 3 COMBUSTION CHAMBER No maintenance is required for com bustion chamber The combustion chamber is an integral part of the com bination heater which can not be removed or replace...

Страница 29: ...e instruction under Filling the Inner Tank page 20 7 Open the water shut off valve on the U Tube assembly and remove handle C When Space Heating System Contains Sufficient Anti Freeze 1 Disconnect power supply to combina tion heater 2 If system pressure is greater than 15 psig relieve system pressure before proceeding System pressure must not exceed 15 psig to prevent damage to inner tank 3 Follow...

Страница 30: ...drain valve connection ø 1 2 NPT 3 Domestic temperature pressure relief valve 150 psi ø 3 4 NPT 4 Primary circuit pressure relief valve 30 psi ø 1 NPT 5 Domestic cold water inlet ø 3 4 NPT 6 Domestic Hot water outlet secondary thermostat sensor ø 3 4 NPT 7 Automatic reset safety sensor LWCO pressure sensor ø 3 4 NPT 8 Primary pressure manual reset safety sensor ø 1 2 NPT 9 Primary thermostat senso...

Страница 31: ...ance Type HM G 25 HM G 30 Input Btu hr 100 000 120 000 Inner Tank Capacity Gal 20 20 Outer Tank Capacity Gal 22 22 Dimensions Inches A 59 59 B 21 21 C 28 28 D 54 5 54 5 E 14 14 F 54 54 G 8 8 H 16 16 Vent size ø 3 3 Connections TP Valve domestic ø 3 4 3 4 Domestic water ø 3 4 3 4 Primary connection ø 1 1 Drain ø 1 2 1 2 Empty weight lb 363 363 Heatexchangersurface Sq Ft 17 17 Chart 3 Dimensional Da...

Страница 32: ...1 9 HMGAU01 Temp Pres gauge 1 10 P3THT01 Operating T Stat 2 11 P3KWB01 Knob 2 12 P3BZL01 Bezel 2 13 HMC0N01 Manual Reset T Stat 1 14 Flue Collector 3 1 15 Turbulators 4 16 HMTPVO1 35 T P Relief Valve 150 psi 1 17 HMRLV01 Pressure Relief Valve 30 psi 1 18 P3AVT01 Auto Air Vent 1 19 P3BSH01 Bushing 1 8 x1 2 1 20 HMLWC01 Pres SW L W C O 1 21 P3DT04 Dip Tube 1 22 HMDRA01 Drain Valve 1 23 HMTH01 Auto r...

Страница 33: ...uous hot water pro duction 3 The heat exchanger made with high grade stainless steel shall have a mini mum of 17 Square Feet of heat transfer surface and will be corrugated The working pressure rating shall be 150 Psi 4 The combination heater shall be factory equipped with two adjustable thermostat at 125 180 ºF and a safety limit aquas tat set at 200ºF with manual reset The outer tank containing ...

Страница 34: ...t weight Available in 5 sizes that can accommodate any size pool or spa TTP Brazed Plate Heat Exchangers For domestic water snow melting radiant floor refrigeration Plates made of stainless steel with a 99 9 copper and brazed ensuring a high resistance to corrosion Self cleaning and self descaling Computerized sizing available from Triangle Tube Phase III Available in capacities from 25 000 BTU hr...

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