H120 –H150 Hot Water Boilers
page 11
4.0 COMMISSIONING
4.1 STARTING BOILER
•
Fill system with water and purge all air from system and pump.
•
Purge gas line of any air and wait five minutes for gas to clear.
•
Plug three pin plug into a suitable power point and switch on. Digital controller should now
operate and indicate water temperature.
•
Pump should start, the flow symbol should be displayed.
•
Turn controller switch ON.
•
After a few seconds, the burner should ignite. (Do not light by any other means.)
•
If the burner fails to light, check flow indicator is on. Turn controller switch OFF for 5
seconds then ON to reset ignition system. (Trouble shooting page 19.)
•
Allow boiler to run. Check there are no leaks and there is flow to all of system.
4.2 TESTING BURNER PRESSURE
•
Set up manometer
•
Turn boiler “OFF”.
•
Remove screw from
⅛
” brass test point located on outlet side of gas valve.
•
Connect manometer tube to test point
•
Turn boiler “ON” and wait for main burner to ignite.
•
Once main burner has ignited, the manometer must indicate the nominal burner pressure
listed below.
•
To adjust gas valve regulator, remove regulator adjustment cap and, using a screwdriver, turn
plastic bush clockwise to increase, anti-clockwise to decrease burner pressure.
•
Check all gas connections are tight and not leaking.
Maximum inlet gas pressure is:
Natural Gas
3.5 kPa
Propane Gas 3.5 kPa
ULPG 3.5 kPa
Nominal burner pressure is:
H120
H150
Natural Gas kPa
0.82
0.82
Propane Gas kPa
2.50
2.50
ULPG kPa
2.00
2.00
4.3 FLOW SWITCH
•
The Hurlcon Boiler has an inbuilt flow switch which allows the burner to operate only when
the system is full of water and the circulating pump is operating. NOTE: The installed flow
switch has no user adjustments.
•
Air in the system may stop the boiler from lighting.
