Roberts Gorden Tubular Unit Heaters 300 - Manual (Page 37)

SECTION 14: R EPLACEMENT P ARTS
31
SECTION 14: REPLACEMENT PARTS
See warnings and notes on Page 24, 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 32,
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 21, Section 10.2.2
.
IT IS IMPORTANT THAT ONLY THE CORRECT
GAS VALVE IS USED WHEN REPLACING THESE
CONTROLS.
½PSI
IN
C
ON
OFF
Description Part Number
Gas Valve, NG (Models UHA[S] 150 - 225) 90032505
Gas Valve, LP (Models UHA[S] 150 - 225) 90032506
Gas Valve, NG (Models UHA[S] 250 - 400) 90032520
Gas Valve, LP (Models UHA[S] 250 - 400) 90032521
NOTE: Flexible duct only applies
for models UHAS.