Sterling GG-105 Manual Do Utilizador

33

9.3
9.2
9.0
8.9
8.7
8.5
8.3
8.1

NATURAL GAS

3.  Remove service access panel.
4.  To clean or replace the burner, remove retainer from 

around manifold orifi ce, disconnect fl ame sensor and 
igniter from control board, remove burner assembly 
mounting screws. See Figure 25.

5.  With the burner removed, wire brush the inside 

surfaces of the heat exchanger.

6.  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.  

7.  Reassemble the unit heater by replacing all parts in 

reverse order.

8.  Complete the appropriate unit startup procedure as 

given in the “Operation” section of this manual. (See 
lighting instruction on the unit nameplate).

9.  Check the burner adjustment.
10.  Check all gas control valves and pipe connections 

for leaks.

11  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 
fl ame on the burner.

12.  Inspect and service motor/fan assembly. To maintain 

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

13.  Check lubrication instructions on motor. If oiling is 

required, add 3 or 4 drops of electric motor oil as 
follows:
a.  Light Duty - After 3 years or 25,000 hours of 

operation.

b.  Average Duty - Annually after 3 years or 8,000 

hours of operation.

c.  Heavy Duty - Annually after 1 year or at least 

1500 hours of operation.

14.  Check and test the operational functions of all safety 

devices supplied with your unit.

Manifold 

Pressure

(In. W.C.)

*Heating 

Value

BTU/Cu. ft.

1,927
1,891
1,853
1,817
1,781
1,745
1,709
1,673

3.2
3.1
3.1
3.1
3.0
2.9
2.9
2.8

  6,500
  7,000
  7,500
  8,000
  8,500
  9,000
  9,500
10,000

802
787
771
756
741
726
711
696

Manifold 

Pressure

(In. W.C.)

PROPANE (LP) GAS

*Heating 

Value

BTU/Cu. ft.

Altitude

(Feet)

Manifold 

Pressure

(In. W.C.)

*Heating 

Value

BTU/Cu. ft.

10.0
10.0
10.0
10.0
10.0

9.9
9.7
9.6
9.5

2,278
2,237
2,196
2,156
2,116
2,077
2,039
2,000
1,964

3.5
3.5
3.5
3.4
3.4
3.4
3.3
3.3
3.2

  2,000
  2,500
  3,000
  3,500
  4,000
  4,500
  5,000
  5,500
  6,000

  

948
931
914
897
881
865
849
833
818

Manifold 

Pressure

(In. W.C.)

PROPANE (LP) GAS

NATURAL GAS

*Heating 

Value

BTU/Cu. ft.

Altitude

(Feet)

*Notes: 
1. Consult local utility for actual heating value.
2. Tables based on heating value of 1,050 BTU/Cu. ft. at sea level.

All Maintenance/Service information should be recorded 
accordingly on the Inspection Sheet provided in this 
manual.

To check gas tightness of the safety shut-off valves, turn 
off the manual valve upstream of the appliance combination 
control. Remove the 3/32 hex head 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 unit heater.