8
2.2.1) Constantly burning pilot
1. Press down the “pilot stat” control button and light
the pilot with a match.
2. Hold down the button for 30 seconds to help purge
air from the pilot gas line.
3. Release the button.
4. The pilot should stay lit. If not, check the
thermocouple and its connection to the pilot stat
control,
5. The pilot flame should envelop the thermocouple. If
it does not, adjust the flame by turning the screw on
the pilot regulator located on the pilot gas line.
2.2.2) Intermittent pilot
This system activates the pilot upon demand. You do
not have to manually light the pilot.
2.3) Lighting the main burners
WARNING
On all types of ignition, wait a minimum of 5
minutes before attempting to relight the pilot.
Simulate a demand by jumping terminals “1” and “2”
located on the exterior of the unit control panel. On all
types of ignitions, the ignition should be smooth
without flame roll-out or orifice burning.
2.4) Verifications and adjustments
Once the main burners are in operation the following
points must be checked:
2.4.1) Manifold pressure
Install a pressure gauge downstream from the gas
valve in the pressure tap provided on the vertical
section of the gas train pipe. The pressure observed
after five (5) minutes of operation should correspond
to the value specified on Table 2. If you have to adjust
the pressure, do so by turning the main setting screw
on the gas valve
TABLE 2
Manifold pressure
Model
Options Pressure ("W.C.)
Natural Propane
HGC-0404
to
HGC-1515
CS, ES
Minimum : 1.0
Maximum : 3.2
Minimum : 2.5
Maximum : 10.5
(HGC-0404 to HGC-0909 only)
2.4.2) Pilot control safety checks
Constantly burning pilot
1. Cut the gas supply by closing the firing valve
upstream of the main gas valve.
2. The valve must close within 90 seconds. You
should hear a “CLICK” sound.
Intermittent pilot
1. Cut the gas supply by closing the firing valve
upstream of the main gas valve.
2. The control circuit should close the valve within 1
second.
2.4.3) Temperature control limit check
Adjust the temperature control limit below the present
water temperature. The gas supply to the burners
should stop immediately. Set the control for a higher
temperature and the burners should come on again
.
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