10
PART 2
OPERATION
1) FUEL
Use only natural gas or propane gas. Never use any
other type of gas.
2) STARTING UP YOUR SYSTEM
2.1) Filling your system with water
All existing piping must be drained and cleaned with
fresh water circulation before filling the new HGRC unit.
1. Close all manual air vents and open the cold water
feed valve to fill the system slowly;
2. Purge the air from the system by letting the
circulating pump run. Check for proper operation of
the automatic air vents and manually actuate the
manual air vents;
3. Check the system pressure and adjust the pressure
regulator as required;
4. Check the system for leaks after the unit has
reached normal operation temperature.
2.2) Lighting the pilot
CAUTION
On all types of ignition, wait a minimum of 5
minutes before attempting to relight the pilot.
If the unit is equipped with a motorized vent
damper, this delay must be with the damper
open.
2.2.1) Constantly burning pilot
1. Set the button on the gas valve to “PILOT”;
2. Press down the button fully and light the pilot with a
match;
3. Hold down the button for 30 seconds to help purge
the air from the pilot gas line;
4. Release the button;
5. The pilot should stay lit. If not, check the
thermocouple and its connection to the gas valve;
6. The pilot flame should envelop the thermocouple. If
it does not, adjust the flame by turning the screw
marked “PILOT ADJUSTMENT” on the gas valve.
2.2.2) Intermittent electronic and hot
surface ignition pilots
These systems activate the pilot upon demand. You do
not have to manually light the pilot.
CAUTION
On a 36C type White-Rodgers valve, do not
put the knob of the gas valve to the pilot
position. This position is not applicable for
intermittent pilot systems. The operation will
be erratic.
2.3) Lighting the main burners
CAUTION
On all types of ignition, wait a minimum of 5
minutes before attempting to relight the pilot.
Simulate a demand by jumping terminals “W” and “R”
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.
2.3.1) Constant pilot
After the pilot is standing, turn the gas knob to the “ON”
position.
2.3.2) Intermittent electronic pilot
1. Turn the gas knob to the “ON” position. The pilot
should begin to spark and when all air is expelled
from the pilot line, the pilot should appear;
2. The sparks should stop and after a short delay
(longer on White-Rodgers systems) the main gas
valve should open the gas to the main burners.
To Next Page
Loading...
