atwood oD50, oD50cW On-Demand Water Heaters - Manuel (Page 6)

6
iTem DescriPTion ParT #
1 Burner Assy (50,000 Btu) 90264
2 Burner Mounting Bracket 90265
3 Igniter 90266
4 Pressure Relief Valve (PRV) 90267
5 Modulating Valve Assembly 90268
6 Gas Valve 90269
7 Gas Line – Burner 90270
8 Relay 90271
9 Water Inlet Tube 90272
10 Gas Inlet Tube 90273
11 Ignition Control 90274
12 Flue Outlet Screen 90275
13 Flue Tube 90276
14 Pressure Switch 90277
15 Blower Assembly 90278
16 Fan Base 90279
17 Flue Hood Assembly 90280
18 Case Assembly 90281
19 Heat Exchanger 90282
20 ECO 90283
21 Low Temperature Switch Kit 90346
22 Orifice #71 (50,000 Btu) 90286
23 Pressure Elbow Assy 90287
nS Standard Door Kit (specify color) Inquire
nS Large Door Kit (specify color) Inquire
nS Winter Kit 90290
WATer HeATer PArTs lIsT
2
3
4 5 6 8 9 10 11 12 13 14 15 16
17
7
18
19
21
20
22
1
23
trouBLESHooting
Most problems are easily remedied by consulting the trouble-
shooting guide. If problems still persist, contact Atwood or an
authorized service center. Only a qualified technician should do
any work involving the gas system.
A periodic visual check of the burner flames should be done
by observing the flame through the “peep hole” in the heat
exchanger. There should be blue flame with minimum or no
yellow tipping.
Burner maintenance should be performed by an Atwood
Authorized Service Technician.
NOTE: The heater is dormant until it senses water
flow. When a water tap is turned on to at least .5 GPm
the burner will fire until water flow is turned off and
the heater again goes dormant.
Heater Does not come on When The Water is turned
on. (Power vent not running)
1. Be sure all electrical connectors are secure and the
polarity is correct. (Red wire to positive terminal).
2. Be sure power is on and panel breaker is not tripped.
3. Check electrical contacts. Be sure the connector is
plugged into board. Using a voltmeter, check for 12 Volts
on this connector.
4. Fuse in power wire might be blown. Replace fuse.