Trane Gas Unit Heaters Wartungshandbuch

GUNE-SVX001A-EN

31 

All maintenance/service information should be recorded 
accordingly in 

.

To check gas tightness of the safety shut-off valves, turn off 
the manual valve upstream of the appliance combination 
control. Remove 1/8-inch pipe plug on the inlet side of the 
combination control and connect a manometer to that tap. 
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 soap solution to 
check all threaded connections. If no leaks are found, 
combination control is faulty and must be replaced before 
putting appliance back in service.

All Maintenance/Service info should be recorded 
accordingly in 

. 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 

safety clearance requirements listed in 

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

the duct furnace.

3. Remove access panel.

4. To clean or replace the burners:

a. Disconnect the gas inlet pipe.

b. Remove the four (4) screws that hold the manifold 

in place, and remove the manifold, gas valve, and 
gas inlet pipe assembly.

c. Visually inspect the burners and heat exchanger 

tubes for signs of soot or debris.

d. If burners require cleaning, they can be cleaned 

with a wire brush and/or compressed air.

e. If inside surface of heat exchanger tubes require 

cleaning, remove manifold bracket sub-assembly 
by removing four (4) screws holding it in place.

5. With the burners removed, use a flexible wire brush 

and compressed air to clean the inside surfaces of the 
heat exchanger tubes.

6. Inspect air inlet for blockage/debris. Clear if any found.

7.

Reassemble the duct furnace by replacing all parts in 
reverse order.

8. Complete the appropriate unit start-up procedure as 

given in the Operation section of this manual (see 
lighting instruction plate on the access side of the unit).

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 duct furnace. The gas valve should 
close tightly, completely extinguishing the flame on 
the burners.

11. Check lubrication instructions on power vent motor. If 

oiling is required, add one or two drops of electric 
motor oil as follows:

a. Light Duty—After 3 years or 25,000 hours of 

operation.