Bosch GWH 425 EF User Manual
Flow modulated with electronic ignition and power venting
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Also See for GWH 425 EF:
- Applications manual (50 pages) ,
- Applications manual (48 pages) ,
- Manual (28 pages)
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Water heaters for use with Natural and L.P.G.
GWH 425 EF
Flow Modulated with Electronic Ignition and Power Venting
Suitable for heating potable water only - Not approved for space heating purposes
(Intended for variable flow applications with steady cold water inlet temperatures)
GWH-425-EF-N
GWH-425-EF-L
Warning:
What to do if you smell gas
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Summary of Contents for Bosch GWH 425 EF
- Page 1 Water heaters for use with Natural and L.P.G. GWH 425 EF Flow Modulated with Electronic Ignition and Power Venting Suitable for heating potable water only - Not approved for space heating purposes (Intended for variable flow applications with steady cold water inlet temperatures)
- Page 2 6 720 607 017...
- Page 3 425EF NG 425 EF LP max. 130 000 Btu/hr 125 000 Btu/hr Gas input min. 28 000 Btu/hr 28 000 Btu/hr 6 720 607 017...
- Page 4 6 720 607 017...
- Page 5 National Electrical Code CSA 22. 1 Electrical Code. 6 720 607 017...
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- Page 7 SCREWS INCANDESCENT PARTICLE TRAY 6 720 607 017...
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- Page 10 VENT HOOD VENT HOOD MUST BE MOUNTED ONE FOOT MINIMUM ABOVE DOORS AND WINDOWS VENT HOOD MUST BE MOUNTED FOUR FEET AWAY FROM DOORS AND WINDOWS VENT HOOD MUST BE MOUNTED FOUR FEET MINIMUM BELOW WINDOWS 6 720 607 017...
- Page 11 Altitude Natural Gas Liquid Propane inches W.C: inches W.C: 0' - 2.000 ft 5.7" 10.5" 2.000 ft - 4.500 ft 4.6" 8.4" 6 720 607 017...
- Page 12 Nominal Iron Pipe Internal Size, Diameter inches inches 0.364 0.493 0.622 0.824 1.049 1 1/4 1.380 1050 1 1/2 1.610 1600 1100 2.067 3050 2100 1650 1450 2 1/2 2.469 4800 3300 2700 2300 3.068 8500 5900 4700 4100 4.026 17,500 12,000 9,700 8,300 Le ngth of Black Iron Pipe , Fe e t 1270 1150 1050...
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Page 15: Setting The Water Temperature
SETTING THE WATER TEMPERATURE Fig. 10 - Principles of Operation 6 720 607 017... - Page 16 6 720 607 017...
- Page 17 The 425 EF pilot and burners are ignited by a water flow valve. Numerous water related problems can cause this water valve to malfunction such as: Insufficient water flow volume to activate the burners at its minimum flow requirement; Dirt in the water flow valve causing it to malfunction; Sediment build-up in faucet aerators, or shower heads;...
- Page 18 Do not add any flow restrictor to the shower head. 6 720 607 017...
- Page 19 Do not add any flow restrictor to the shower head. 6 720 607 017...
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