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. Now the burner should fire and go to full fire,
then set the head pressure in accordance to the rating plate. 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 emission checks 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.
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.
14.
You are then required to check the strength of the flame sensing device by
removing the link on the burner which connects the flame probe to the control
box and put your multi-meter in series, which should give you a reading in uA.
The signal strength should be a least 70uA for U.V. and 6uA on flame
rectification.
15.
After running the unit for a period of one hour you will be able to get a running
temperature from the fan limit side of the stat. When you have this you must
set the over heat to 20°c above the running temperature. The supply fans
should be shut down once, when the burner is running, to try the overheat
protection device and the fans must be switched on as soon as it locks out on
over heat.
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