59
•
This boiler is designed for low fire soft start. At the start of trial for ignition the fan will decelerate to minimum fire and will light off at
soft start speed before ramping up towards full input through the 4-20mA from the controller.
•
Shut power off to the heater and open the firing valve. Switch power back on and allow the burner to fire. Ignition should be smooth.
Normally the differential gas pressure will be identical to the differential air pressure. Actual differential pressure may vary from the
numbers on the test label due to the field conditions and sample variations. Always make adjustments to meet the recommended
CO
2
levels. Adjust high fire first followed by low fire adjustment.
•
Allow the water temperature to rise so that the heater cycles on the operator.
•
Check the temperature rise across the heat exchanger. This will be indicated by taking a difference between the inlet and outlet
temperatures on the Avenger control.
•
Allow the unit to cycle on the limit. This can be done by gradually restricting outlet water flow to raise outlet temperature and then
slowly rotating the limit dial. The auto reset limits are set at 200ºF for domestic hot water and hydronic heating.
•
At full fire, block 50% of the fan inlet opening. The display should show ‘LCI OFF’. If it does not, slowly turn the adjustment on the
normally closed blocked flue switch counter-clockwise until the blocked flue switch light goes out.
•
Check the air proving switch. Remove the restriction from the fan inlet and reset the power on the control panel. A properly set air
proving switch will permit the boiler to continue running when it is running at minimum fire.
•
Check the ignition retries circuit.
•
Shut the main gas off to the unit and allow it to try for ignition. Trial for ignition should commence within 30 seconds.
8.4
COMISSIONING APPLIANCE
•
Remove manometers and replace inlet gas pressure test plug.
•
Fill out start up report for each heater. Be sure to record all settings and readings. Retain a copy of report for future reference.
•
Startup is now complete, and heater may be placed into service.
Содержание Avenger Series
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Страница 35: ...30 Figure 21 Recommended Piping with Reverse Return and Variable Primary Flow...
Страница 80: ...75 PART 12 EXPLODED VIEW Note Some items may not be as shown AVENGER PARTS LIST Figure A JACKET ASSMEBLY...
Страница 84: ...79 Figure B BLOWER BURNER ASSEMBLY...
Страница 87: ...82 Figure C TYPICAL GAS TRAIN AR1000 AR3000 Figure D TYPICAL GAS TRAIN AR3500 AR4000...
Страница 89: ...84 Figure E CONTROL BOARD ASSEMBLY...
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