Doc No. 20-45-159 Page 46 of 60
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3 >40s Pilot ignition... Burner Ignition
4 <60s Burner ignition cycle complete
Note:
It is strongly recommended that the separate manual
concerning the operational details of the burner supplied with
the heater as part of the information package is studied prior
to commissioning.
Time intervals within the ignition sequence will vary slightly
from one model to another.
Warning
If burner ignition is not satisfactorily accomplished,
commissioning must not proceed until the reason or fault has
been identied and rectied, if necessary by reference to the
separate burner information or to section 6 of this manual.
(j) Repeat steps 3.2 c,a,
(k) Re-check all connections and joints for gas soundness
using an approved leak detection uid.
(l) Remove burner cover and attach manometers to check
burner pressure settings.
(m) Repeat steps 3.2 d,e,f, allowing the heater to reach thermal
equilibrium.
(n) Check burner pressure settings are in line with the data as
per section 1.15 (if adjustment is necessary refer to separate
burner information within section B)
Note (i)
The gures quoted in section B are independent test gures
based upon zero ue resistance.
On completion mark the gas valve adjustment screw with
paint/sealant to prevent tampering with valve
(o) Adjust room thermostat to its highest setting, and allow
the heater to continue to re.
(p) Gradually reduce the temperature setting on the room
thermostat until the burner shuts down, (@ < ambient) and
then gradually increase the temperature setting on the
thermostat until heat is called for, (@ > ambient) and the
burner automatically re-res.
(q) Re-set time clock to a minimum o period, checking that
the burner shuts down, and then automatically re-lights once
the minimum o period has elapsed (Separate information on
the time clock is contained within the information package
supplied with the heater).
(r) Check fan and limit stat by depressing and holding in the
fan motor overload re-set button, located on the heater
electrical panel. The time between the fan stopping and
burner shut down should be noted, once the burner has shut
down the overload on the motor should be released.
On completion delete any override settings on optimised
control and return temperature settings to customer
requirements.
(s) Undertake ue gas analysis using approved and calibrated
analysing equipment recording data on the commissioning
card, ie, CO, CO2, net and gross ue temperatures. Record
mains gas, and burner head pressure, ambient temperature,
barometric pressure, and complete percentage eciency
calculation using the formula detailed in section 1.15.
Note (ii)
The burner air and gas pressure settings should be only very
nely adjusted to achieve a CO2 reading of 9.3% (+/- 0.1%).
Note (iii)
The net eciency must not be lower than 79% for heaters
tted with a modulating or hi/lo burner.
In other cases he net eciency level must not be lower than
84%
Note (iv)
All Cabinet Heaters are test red and pre-commissioned as
part of the manufacturing process, if however, during on site
commissioning the data are found to be not in accordance
with the manufacturers data, then the following action is
recommended.
* Re-check all readings and calculations.
* Adjust burner as per manufacturers instructions.
* Consult the Technical Department, details on rear page.
(t) Complete commissioning card and provide operating
instructions for the user, high-light the fact that the
manufacturer recommends that in the interests of safety and
eciency the heater is serviced on a regular basis only by
qualied and competent persons.
The completed commissioning card must be returned to the
supplier (details on rear page) immediately after the
satisfactory completion of commissioning, failure to do so can
invalidate any subsequent warranty claim.
(u) Set all controls to the requirements of the user.
3.3 Commissioning - air delivery system
On free blowing applications the integrity of the fastenings on
the heater top and outlet nozzles must be checked .
Final adjustment for the direction of the air ow from the
nozzle hoods should be made, and the hoods should be
secured in the required position by drilling through the two
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