Trane Gas Unit Heaters Wartungshandbuch

GHND-SVX01C-EN

33 

All Maintenance/Service information should be recorded 
accordingly on the inspection sheet provided in this 
manual (see 

).

To check gas tightness of the safety shut-off valves, turn off 
the manual valve upstream of the appliance combination 
control. Remove the 1/8-inch pipe plug on the inlet side of 
the combination control and connect a manometer to that 
tapping. Turn the manual valve on to apply pressure to the 
combination control. Note the pressure reading on the 

manometer, then turn the valve off. A loss of pressure 
indicates a leak. If a leak is detected, use a soap solution to 
check all threaded connections. If no leak is found, 
combination control is faulty and must be replaced before 
putting appliance back in service.

Should maintenance be required, perform the following 
inspection and service routine:

1.

Inspect the area near the unit to be sure that there is no 
combustible material located within the minimum 
clearance requirements listed in this manual.

2. Turn off the manual gas valve and electrical power to 

the gas unit heater.

3. To clean or replace the main burners, remove the 

bottom panel and compress the spring by moving the 
burner toward the manifold. Slide the opposite end of 
the burner downward from the locating slot while 
retaining spring is still compressed. Pull the burners 
away from the heat.

4. With the burners removed, wire brush the inside 

surfaces of the heat exchanger.

5. Remove any dirt, dust, or other foreign matter from the 

burners using a wire brush and/or compressed air. 
Ensure that all parts are unobstructed. Inspect and 
clean pilot burner if necessary.

6. Reassemble the gas unit heater by replacing all parts in 

reverse order.

7.

Complete the appropriate unit start-up procedure as 
given in 

 (see lighting instruction 

plate ).

8. Check the burner adjustment (see 

9. Check all gas control valves and pipe connections for 

leaks.

10. Check the operation of the automatic gas valve by 

lowering the setting of the thermostat, stopping the 
operation of the gas unit heater. The gas valve should 
close tightly, completely extinguishing the flame on 
the main burners.

11. Inspect and service the motor/fan assemblies. To 

maintain efficient air flow, inspect and clean the fan 
blades and guard to prevent buildup of foreign matter.