8.
Make sure that the stat, which is wired between terminals 1 & 2 is closed
and turn main gas on to make the gas pressure switch and turn the
commissioning stop tap off. Switch the burner on, the burner should run
through its cycle and after the ignition spark goes out, the burner should
lockout on flame failure on the control box.
9.
Before opening the commissioning stop tap ensure that the burner air
damper is open. The main valve has to be disconnected and the pilot is
to be left connected, then open the commissioning tap and switch the
burner on. The burner should go through its sequence and fire but stay
on. At this point in time you have to check the start gas rate which
should be no greater than 20% of the total output. This is preset in the
factory and should be checked.
10.
When satisfied with the pilot pressure, switch the burner off and
reconnect the main valve, turn the main gas valve and turn the gas valve
throttle to minimum and switch the burner back on and make the
high/low circuit. Now the burner should fire and go to full fire, then set
the head pressure in accordance to the rating plate, now break the circuit
between 6 & 7 so that the valve goes to low fire and set it in accordance
to the rating plate pressure. The governor must be throttled down until it
takes control of the head pressure and left there. The main gas valve
throttle can be locked in to position when the gas head pressure is set.
When you are satisfied with the gas settings then the CPI switch requires
setting on the SKP valves, they are integral, which are factory set. For
further information please see burner insert in this manual.
11.
Carry out full emissions check with a flue gas analyser. The parameters
are to be set as specified in this manual by the adjustment of the burner
air damper, which, when satisfied must be locked off securely. Then the
burner requires setting 50% turndown, which can be done by breaking
the circuit between 6 & 7, when you break this circuit you must check
the emissions are okay. They will be approximately 10% to 11% O² on
low fire and CO emissions should be below 100 PPM. Note the air
damper is not altered between high and low, it is set on high.
12.
The high and low air pressure switch must be set after the damper has
been locked off. The low air pressure switch is set by turning it up until
it locks out and moving it back 1.2mb on the pressure switch then setting
the high air pressure switch to 1.2mb above the lockout pressure.
13.
The low gas pressure switch will be pre-set in the factory to 10mb.
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