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Index Index 1 Warning 1 Warning 2 Warning: If the information in this 2 Appliance details 4 manual is not followed exactly, a fire or 2.1 Features 4 explosion may result causing property 2.2 GWH-635-ES Specifications (Technical data) 4 damage, personal injury or death. 2.3 Dimensions and Minimum installation clearances 6 2.4 General rules to follow for safe operation 7 2.5 Proper location for installing your heater 7 Warning: Improper installation, 2.6 Clearances 8 2.7 Mounting installation 8 ad
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Appliance details 2 Appliance details 2.1 Features 2.2 GWH-635-ES Specifications (Technical data) Parts Approved in US/Canada Touch Pad interface control High power pre-mix compact burner with low Nox Capacity emissions Maximum flow rate: 6.35 GPM (24 l/min) at a 45°F Modulating Gas Valve with constant gas:air ratio (25°C) rise. control Maximum output Modulating water valve for improved comfort and 142,968 Btu/h (41.8 kW) temperature control. Safety Maximum input 175,000 Btu/h (51.2 kW
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Appliance details 2.3 Dimensions and Minimum installation clearances Fig. 4 Dimensions 1 Cover 2 On/Off switch 3 Reset button 4 LCD display 5 Program button 6 Temperature buttons Fig. 5 Minimum clearances Model GWH-635-ES TOP (A) 12 FRONT (B) 1 BACK 0 SIDES 1 FLOOR (C) 12 VENT DIAMETER 3 Table 1 Minimum clearances 6 6 720 607 072
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Appliance details construction, infiltration air is normally adequate to 2.9 Venting provide air for combustion. Warning: Do not reduce the vent Appliances located in confined spaces: (exhaust and combustion) pipe sizes The confined space must be provided with two and do not common vent with any other permanent openings, one commencing within 12 vented appliance or stove. inches (304.8mm) of the top and one commencing within 12 inches (304.8mm) of the bottom of the NOTE: This appliance's exha
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Appliance details Recommended exhaust vent terminator position Fig. 16 Ref. Description Minimum distance Directly below an opening; operable windows, doors and any non- A 36 in mechanical fresh air openings Below a gutter, sanitary pipework or eaves 24 in B Below a gutter, sanitary pipework or eaves, protected by metal 12 in shielding C From any internal corner 12 in Above ground 12 in D* Above a paved sidewalk 7 ft From an opposing wall or structure facing the termination 24 in E From any othe
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Appliance details 2.10 Gas piping & connections Before connecting the gas supply, check the rating plate on the right side of the heater to be sure that the heater is rated for the same gas to which it will be connected. In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54. In Canada: The Installation should conform with CGA B149 INSTALLATION CODES and/or local installation codes. GAS LINE SIZING T
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Appliance details FOR NATURAL GAS Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Follow boxed numbers for piping just one 635-ES (example: ¾ B.I. Natural Gas pipe for 20 ft (6.1m). will handle 190,000 btus (55.7 kWh). For multiple appliances combine the total btu input load and then refer to applicable chart below. Nominal Iro
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Appliance details 2.14 Electrical connections 2.16 For your safety read before operating your water heater Warning: For safety reasons, disconnect the power supply to the Warning: If you do not follow these heater before any service or testing is instructions exactly, a fire or explosion performed. may result causing property damage, personal injury or loss of life. Warning: This heater must be A. This appliance is equipped with electronic ignition for electrically grounded in accordance lightin
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Appliance details NOTE: on a first time initial instal- lation or after gas line work has i been done, existence of air in the gas line will cause ignition delay when the hot water is turned on. This will result in an error (EA) on the units display screen. This is normal. When this occurs, leave the hot water running and wait 3-5 seconds, then reset the unit (Fig. 26, pos. 2). Wait for (EA) to disap- pear. The heater will begin to at- tempt ignition again, if the (EA) reappears the
