14.
After running the unit for a period of one hour you will be able to get a
running temperature off the fan limit side of the stat. When you have
this you must set the overheat 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 switched on as
soon as it locks out on overheat.
15.
All gas nipples are to be replaced and checked for tightness and checked
with leak detection fluid.
16.
A leak detection test is to be done with leak detection fluid and
electronic leak detector on the gas train while the burner is running to
see if there are any leaks in the burner gas train and a soundness test is to
be done on all gas work.
17.
Finally make a full record of combustion data on commissioning sheet
provided; a copy is to be presented to the customer and to BMM Heaters
on completion of work. The commissioning sheet should include the
following:-
(a)
Model and serial number.
(b)
Heater running temperature and overheat settings.
(c)
Full thermal input.
(d)
Governor pressure settings (pilot for start gas and main for full fire).
(e)
Gas flow rates for full fire.
(f)
Burner damper setting and pressure switch settings.
(g)
Flame signal strength on full fire.
(h)
Exhaust gas O², CO², CO and temperature.
18.
After setting all air pressure switches and valves etc., you must mark the
position or lock off if possible.
Please note, BMM Heaters provide a full commissioning service if required.
Also if you require further information call BMM Heaters technical
department.
TYPICAL FLUE GAS READINGS
O² - 4% to 5%
CO² - 9.5% to 10%
CO – up to 100 PPM (Typical approx 20 PPM)
Flue Stack Temperature – Up to 330°c Nett
31
