Parts List; Troubleshooting - Atwood OD50 Operating & Maintenance Instructions

20
21
3
2
22
iTem DescriPTion
1 Burner Assy (50,000 Btu)
2 Burner Mounting Bracket
3 Igniter
4 Pressure Relief Valve (PRV)
5 Modulating Valve Assembly
6 Gas Valve
7 Gas Line – Burner
8 Relay
9 Water Inlet Tube
10 Gas Inlet Tube
11 Ignition Control
12 Flue Outlet Screen
13 Flue Tube
14 Pressure Switch
15 Blower Assembly
16 Fan Base
17 Flue Hood Assembly
18 Case Assembly
19 Heat Exchanger
20 ECO
21 Low Temperature Switch Kit
22 Orifice #71 (50,000 Btu)
23 Pressure Elbow Assy
nS Standard Door Kit (specify color)
nS Large Door Kit (specify color)
nS Winter Kit
WATer HeATer PArTs lIsT
19
7 23 4 12 5 13 6
ParT #
90264
90265
90266
90267
90268
90269
90270
90271
90272
90273
90274
90275
90276
90277
90278
90279
90280
90281
90282
90283
90346
90286
90287
Inquire
Inquire
90290
17
10
14 15 8 9 11 16

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.
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