Section 15: Replacement Parts; Gas Valve - Addison UHA 150 Installation, Operation & Service Manual

UHA S U H
TANDARD NIT EATER

SECTION 15: REPLACEMENT PARTS

DANGER
Electrical Shock Hazard
Use only genuine ADDISON
manual.
Failure to follow these instructions can result in death, electric shock, injury or property damage.
See warnings and important information on Page
32, Section 13 before removing or replacing parts.
Burner Components
All serviceable burner parts are accessed by the
door on the side of the heater. Control door opens
via tooled access.

15.1 Gas Valve

Remove the gas supply pipe at the heater inlet.
Follow steps on Page 41, Section 15.2 and See
Page 41, Section 15.2.1 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 29, Section 11.2.2.
NOTE: Seperated combustion
model shown.
C
ON
OFF
Description
Gas Valve, NG (Models UHA[X][S] 150 - 250)
Gas Valve, LP (Models UHA[X][S] 150 - 250)
Gas Valve, NG (Models UHA[X][S] 300 - 400)
Gas Valve, LP (Models UHA[X][S] 300 - 400)
40 of 49
I O
NSTALLATION PERATION AND
Explosion Hazard
®
replacement parts per this installation, operation and service
Part Number
90032505
90032506
90032520
90032521
S M
ERVICE ANUAL
WARNING
Fire Hazard
IT IS IMPORTANT THAT ONLY THE CORRECT
GAS VALVE IS USED WHEN REPLACING THESE
CONTROLS.
Flexible
Air Duct
Carbon Monoxide Hazard