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POWERED DIRECT VENT GAS WATER HEATER
A Spanish language version of these instructions is available by contacting the
company listed on the rating plate.
La version espanola de estas instrucciones se puede obtener al escribirle a la
fabrica cuyo nombre aparece en la placa de especificaciones.
INSTALLATION AND OPERATING INSTRUCTION MANUAL
WARNING:
followed exactly, a fire or explosion may result causing
property damage, personal injury, or death.
Do not store or use gasoline or other flammable,
combustible, or corrosive vapors and liquids in the
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 neighbor's
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
installer, service agency or the gas supplier.
For your family's comfort, safety and convenience we recommend
this water heater be installed and serviced by a plumbing
professional.
If the information in these instructions is not
FOR YOUR SAFETY
238-51370-00B REV 2/16
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Summary of Contents for Honeywell 51370B
- Page 1 POWERED DIRECT VENT GAS WATER HEATER A Spanish language version of these instructions is available by contacting the company listed on the rating plate. La version espanola de estas instrucciones se puede obtener al escribirle a la fabrica cuyo nombre aparece en la placa de especificaciones. INSTALLATION AND OPERATING INSTRUCTION MANUAL WARNING: If the information in these instructions is not...
- Page 2 CONGRATULATIONS! You have just purchased one of the finest water heaters on the market today! This installation, operation and instruction manual will explain in detail the installation and maintenance of your new Powered Direct Vent Gas Water Heater. We strongly recommend that you contact a plumbing professional for the installation of this water heater.
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Page 3: Table Of Contents
TABLE OF CONTENTS Page GENERAL INFORMATION ..............INSTALLATION.................. Locating the Water Heater ............Minimum Clearances ..............Venting ..................Specifications for 75 Gal. (283.9 L) ..............13 Vent pipe preparation and joining ........... 25 Water Connections ................26 Gas Connections ................29 Electrical Connections .............. -
Page 4: General Information
GENERAL INFORMATION This gas-fired water heater’s design is certified by CSA International under the American National Standard Z21.10.1 and CSA 4.1-M, most current editions at the time of manufacture. This water heater must be installed in accordance with local codes or, in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1-Latest Edition) and/or in Canada CAN/CGA B149 Installation Codes (Latest Editions). -
Page 5: Installation
General Information continued- Make sure that you check the rating plate and combination gas control on the water heater to be certain that the type of gas being supplied corresponds with the marking on the rating plate and combination gas control. A sacrificial anode is used to extend tank life. - Page 6 Installation (Locating the Water Heater) continued- Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors. Examples of some typical compounds that are potentially corrosive are: spray can propellants, cleaning solvents, refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes and process chemicals.
- Page 7 Installation (Locating the Water Heater) continued- WARNING DO NOT ATTEMPT TO LIGHT ANY GAS APPLIANCE IF YOU ARE NOT CERTAIN OF THE FOLLOWING: Liquefied petroleum gases/propane gas and natural gas have an odorant added by the gas supplier that aids in the detection of the gas.
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Page 8: Minimum Clearances
Minimum Clearances WARNING Failure to adhere to these installation and operating instructions may create a hazard to life and property and will nullify the warranty. This installation must allow access to the front of the water heater and adequate clearance must be provided for servicing and operating this water heater. - Page 9 Venting continued- Canadian Installations Installations 12 inches 12 inches Clearance above grade, veranda, porch, deck or balcony (30 cm) (30 cm) 12 inches 12 inches Clearance to window or door that may be opened (30 cm) (30 cm) Clearance to permanently closed window Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal Clearance to unventilated soffit...
- Page 10 Venting continued- NOTICE In locations where sustained outside air temperatures are below freezing, it is possible for the vent terminations to accumulate ice build-up due to adverse local climate conditions (prevailing wind direction, wind speed, termination orientation, etc.). The optional concentric vent terminal is more resistant to this ice build-up. In more severe temperature conditions, an optional manufacturer approved air intake relief device is available and may be installed, per the instructions, to prevent nuisance shut down of the water heater.
- Page 11 Venting continued- NOTICE Single Wall Polypropylene venting systems that are listed on the Bradford White website are approved for use in the water heaters covered in this instruction manual. The venting system components are ULC S636 approved and listed by a recognized agency and may be installed in the U.S. and Canada.
- Page 12 Approved Venting Materials For installations in the US For installations in CANADA ULC S636 approved PVC for only flue gas venting rated Class II, PVC DWV (ASTM D-2665) 65°C PVC Sch. 40, 80, 120 (ASTM- ULC S636 approved CPVC for D1785) flue gas venting rated Class II, ...
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Page 13: Specifications For 75 Gal. (283.9 L)
Venting System Condensation Condensate formation does not occur in all installations of power direct vented water heaters, but should be protected against on installations where condensation can form in the venting system. Formation of condensation in the venting system of Power Vented water heaters is dependent upon installation conditions including, but not limited to: Ambient temperature and humidity of installation location;... - Page 14 Venting continued- Table 2 lists the venting distances allowed with 4” (10.2 cm) diameter vent pipe. When venting with 4” (10.2 cm) vent pipe, use a 4” (10.2 cm) to 3” (7.6 cm) reducer to exit through the building wall with 3” (7.6 cm) vent pipe. Use the 3” (7.6 cm) vent terminal supplied with the water heater to terminate on the outside of the building.
- Page 15 Venting continued- TABLE 2 -VENT CONNECTOR LENGTHS FOR 4” (10.2 cm) DIAMETER VENT PIPE Maximum straight # of 90 Length ft. (m) straight Terminating Elbows (excl. Length 75 gal. vent term.) ft. (m) Through the Wall 95 (29.0) 10 (3.1) Through the Wall 90 (27.4) 10 (3.1)
- Page 16 Venting continued- THROUGH THE WALL VENTING: (HORIZONTAL VENTING WITH STANDARD VENT TERMINALS). Cut two 3 1/2 in. (8.9 cm) diameter holes in the wall at the point where the vent connector is going to pass through the wall. Use the proper cement to secure the 90°...
- Page 17 Venting continued- Vent terminal configurations for through the wall venting. When venting through the wall, the exhaust terminal must exit the structure at a minimum distance of 16” (40.6 cm) from the intake terminal. The exhaust terminal must not be located below the intake terminal for any reason (see figure 4a below for examples of acceptable vent terminal configurations).
- Page 18 Venting continued- Figure 4c IMPORTANT When using the vent terminal configuration shown in 4c the extra elbows must be accounted for in the total vent length see Table 3 or Table 4.
- Page 19 Venting continued- THROUGH THE WALL VENTING: (HORIZONTAL VENTING WITH CONCENTRIC VENT). Cut one 4 5/8 in. (11.7 cm) diameter hole in the wall at the point where the vent connector is going to pass through the wall. Use the proper cement to secure the vent terminal to the vent connector.
- Page 20 Venting continued- It is acceptable to install a 90 degree elbow on IPEX concentric vent terminations use with this power direct vent water heater (see Figure 5b). A short length of appropriate diameter vent pipe should be used to transition from the vent terminal to the 90 degree elbow.
- Page 21 Venting continued- 3” VENT INSTALLATION 4” VENT INSTALLATION Figure 6 NOTE: For installations requiring both horizontal and vertical runs, the following rule must be followed: Total length of straight pipe (both horizontally and vertically) must not exceed the maximum equivalent length listed in these instructions.
- Page 22 Venting continued- THROUGH THE ROOF VENTING: (VERTICAL VENTING CONCENTRIC VENT TERMINAL): Cut the necessary holes through the roof and ceiling and install the vent connector as shown in Figure 7. Make sure that the installation meets the local codes and/or the National Fuel Gas Code ANSI Z223.1 (Latest Edition) or CAN/CGA B149 installation code (latest edition).
- Page 23 Venting continued- THROUGH THE WALL VENTING WITH LOW GROUND CLEARANCE: When venting cannot exit through the wall at a height greater than or equal to 12” (30.5 cm) above the ground, or anticipated snow level, the installation must be modified as shown below (see Figure 8). Refer to Table 3 for maximum venting lengths using 3”...
- Page 24 Venting continued- TABLE 3 3” (7.6 cm) VENT CONNECTOR LENGTHS FROM INSIDE WALL FOR LOW GROUND CLEARANCE INSTALLATIONS Max Straight # of Elbows Length ft. (m) straight Terminating (excl. vent term.) Length 75 gal. ft. (m) (2) 90 Elbows with (1) 5 (1.5) 40 (12.2) 90...
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Page 25: Vent Pipe Preparation And Joining
VENT PIPE PREPARATION AND JOINING Most failures in vent systems result from improper preparation and joining of pipe and fittings. The guidelines below must be followed when installing the venting system. If you have any question about the application or installation of the venting system, contact the vent pipe manufacturer, supplier, or your plumbing professional. -
Page 26: Water Connections
Water Connections Note: BEFORE PROCEEDING WITH THE INSTALLATION, CLOSE THE MAIN WATER SUPPLY VALVE. After shutting off the main water supply, open a faucet to relieve the water line pressure to prevent any water from leaking out of the pipes while making the water connections to the water heater. - Page 27 Water Connections continued- WARNING For protection against excessive temperatures and pressure, install temperature and pressure protective equipment required by local codes, but not less than a combination temperature and pressure relief valve certified by a nationally recognized testing laboratory that maintains periodic inspection of production of listed equipment or materials as meeting the requirements of the Standard for Relief Valves and Automatic Gas Shutoff Devices for Hot Water Supply Systems,...
- Page 28 Water Connections continued- WARNING Hydrogen gas can be produced in an operating water heater that has not had water drawn from the tank for a long period of time (generally two weeks or more). Hydrogen gas is extremely flammable. To prevent the possibility of injury under these conditions, we recommend the hot water faucet to be open for several minutes at the kitchen sink before you use any electrical appliance which is connected to the hot water system.
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Page 29: Gas Connections
Gas Connections WARNING Prior to connecting the gas supply line to a gas fired water heater, ensure that the gas supply line does not have moisture/water or dirt/scale inside the gas line. Commonly this check is done at the lowest point in the gas distribution system prior to gas burning appliances. -
Page 30: Electrical Connections
Gas Connections continued- CAUTION The water heater and individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of the system at test pressures in excess of 1/2 psi (3.5 kPa). The water heater must be isolated from the gas supply piping system by closing its manual shutoff valve during any pressure testing of the gas supply system at test pressures equal to or less than 1/2 psi (3.5 kPa). -
Page 31: Wiring Diagram
Wiring Diagram Figure 9... -
Page 32: General Operation
GENERAL OPERATION WARNING Water heaters are heat producing appliances. To avoid damage or injury there must be no materials stored against the water heater or vent-air intake system, and proper care must be taken to avoid unnecessary contact (especially by children) with the water heater and vent-air intake system. -
Page 33: Lighting And Shutdown Instructions
Lighting and Shutdown instructions... -
Page 34: Thermostat Adjustment
Thermostat Adjustment The thermostat dial is adjusted to its lowest setting when shipped from the factory. When adjusting the thermostat, it should be remembered that lower temperature settings are more energy efficient. To adjust the thermostat turn the dial clockwise until the minimum acceptable temperature is set. It is suggested that the starting point setting not exceed the 120°F (49°C) or “HOT”... -
Page 35: Burner Flame Check
Burner Flame Check Steel Burner: These models are equipped with self-adjusting air mixture and do not have an adjustable air shutter (See Figure 11). At periodic intervals a visual check of the main burner and pilot flames should be made to determine if they are burning properly. -
Page 36: Maintenance
MAINTENANCE WARNING Water heaters are heat producing appliances. To avoid damage or injury there must be no materials stored against the water heater or vent-air intake system, and proper care must be taken to avoid unnecessary contact (especially by children) with the water heater and vent-air intake system. - Page 37 Maintenance continued- 5. Annually remove the inner door and main burner assembly to clean orifices and related parts of any dirt or other foreign material. Inspect the burner ports for obstructions or debris and clean with a wire brush as needed. Wire brush and/or vacuum clean the combustion chamber as needed to remove scale deposits and debris.
- Page 38 Maintenance continued- WARNING When lifting lever of the combination temperature and pressure relief valve, hot water will be released under pressure. Be careful that any released water does not result in bodily injury or property damage. WARNING Do not run out of propane gas. Damage to the water heater may occur. 6.
- Page 39 Maintenance continued- CAUTION FOR YOUR SAFETY, DO NOT ATTEMPT REPAIR OF COMBINATION GAS CONTROL, BURNERS OR GAS PIPING. REFER REPAIRS TO A QUALIFIED SERVICE TECHNICIAN. Contact your supplier or plumbing professional for replacement parts or contact the company at the address given on the rating plate of the water heater. Provide the part name, model and serial numbers of the water heater when ordering parts.
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Page 40: Troubleshooting
TROUBLESHOOTING LED Status Control Status Probable Cause None (LED not on or Electrical power not Control power switch in “OFF” position. Supply flashing) present. voltage interrupted. Stand‐by mode, One short flash every Thermostat is Temperature demand is satisfied (no call for heat). four seconds satisfied (no faults). Alternates bright and Thermostat calling Tank temperature below set point of thermostat. dim (Heartbeat) for heat (no fault). 1. Unstable pilot. 2. Pilot tube block or restricted. Short flash once 3. Oxidation build up on pilot electrode. Weak pilot signal on every second last call for heat. 4. Wire damage to pilot assembly or bad connection at gas valve. Short flash once Idle remote 1. Control put in idle or Sabbath mode from every two seconds command off accessory module Pressure switch not 1. Pressure switch tubing kinked or blocked. Two flashes, three ... - Page 41 Troubleshooting continued- LED Status Control Status Probable Cause Pressure switch or 1. Pressure switch tubing kinked or blocked. blower temperature 2. Vent blockage or improper vent configuration. Six flashes‐two switch opened 3. Vent termination being affected by windy flashes, three second during burner conditions. pause (Soft lockout) operation. 4. Blower not spinning up to speed. System auto resets 5. Vent temperature too high. after 5 minutes. 6. Faulty pressure switch or blower temp. switch. 1. Unstable pilot. Pilot flame 2. Pilot tube blocked or restricted. Six flashes‐three extinguished. 3. Oxidation build up on pilot electrode. flashes, three second System resets after 5 4. Wire damage to pilot assembly or bad pause (Soft lockout) minutes. connection at gas valve. 5. Insufficient combustion air. Six flashes‐four Undesired‐false pilot flashes, three second flame sensed. Pilot valve stuck in open position. pause (Soft lockout) ...
- Page 42 Control Sequence of Operation Start up Sequence Upon powering up, the control checks for the presence of the vapor sensor, if the resistance is in the expected range the control will begin normal operation after 5 to 8 seconds. Normal Heating Sequence The thermostat senses a need for heat.
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Page 43: Parts List And Parts List Drawing
14 Pilot Assembly 3. Pressure Switch N.O. 15. Main Burner Orifice 4. Flue Baffle 16. Gas Feed line 5. Honeywell Gas Control Valve 17. Flammable Vapors Sensor 6. Drain Valve 18. Sensor Harness 7. Fiberglass Insulation (not shown) 19. Inner Door Assembly 8. -
Page 44: Space Heating
THE FOLLOWING INSTRUCTIONS ARE FOR INSTALLATION OF: GAS WATER HEATERS SUITABLE FOR WATER (POTABLE) HEATING AND SPACE HEATING 1. All piping components connected to this water heater for space heating applications must be suitable for use with potable water. In Massachusetts, space heating piping length must not exceed 50 feet.