Roberts Gorden UHD[X][S][R] 200 User Manual

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UHD S
TANDARD
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UCT
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URNACE
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NSTALLATION
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PERATION
 
AND
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ERVICE
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ANUAL
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SECTION 14: REPLACEMENT PARTS
See warnings and important information on Page 
25, Section 12
 before removing or replacing parts.
Burner Components
All serviceable burner parts are accessed by the 
door on the side of the heater. Remove the 
sheetmetal screws.
14.1 Gas Valve
Remove the gas supply pipe at the heater inlet.
Follow steps in Section 14.2 and See Page 33, 
Section 14.2.1
 to remove gas valve/manifold.
Replace in reverse order. Verify that the gas flow 
direction of the valve is correct. Use a minimum 
amount of gas seal on the thread joint. Check that 
all the joints are leak free. Reset gas valve. See 
Page 23, Section 10.2.2
.
IT IS IMPORTANT THAT ONLY THE CORRECT 
GAS VALVE IS USED WHEN REPLACING THESE 
CONTROLS.
WARNING
Explosion Hazard
Installation, service and annual inspection 
must be done by a contractor qualified in 
the installation and service of gas-fired 
heating equipment or your gas supplier.
Turn off gas and electrical supplies before 
performing service or maintenance.
Failure to follow these instructions can 
result in death, injury or property damage.
½PSI
IN
C
ON
OFF
Flexible 
Air Duct
NOTE: Separated combustion model shown.
          
Description
Part Number
Gas Valve, NG (Models UHD[X][S][R] 150 - 225)
90032505
Gas Valve, LP (Models UHD[X][S][R] 150 - 225)
90032506
Gas Valve, NG (Models UHD[X][S][R] 250 - 400)
90032520
Gas Valve, LP (ModelsUHD[X][S][R] 250 - 400)
90032521