22/30
(k) Turn on the electrical supply and
ventilation manual switch. The fan will
start enabling the direction of the fan
impeller to be verified.
(l)
Switch off electrical supply.
(m) At the heater control panel or remote
panel set the required positions of the
thermostats and time clock.
Table 14
VHC/HCH Working
point
Rt 25°C
Switching
point
100
150
200
300
400
500
600
700
800
1000
±
52°C
±
55°C
±
40°C
±
51°C
±
77°C
±
84°C
±
50°C
±
53°C
±
52°C
±
60°C
100°C
100°C
90°C
90°C
100°C
100°C
90°C
90°C
90°C
90°C
5.2 Commissioning
Procedure
5.2.1
do not proceed with this section unless all
parts of section 6.1.2 have been successfully
completed. In the event that one part does
not comply DO NOT PROCEED. Seek
assistance from the supplier. Refer to the
burner manual, supplied separately,
ensuring all setting data is known before
commencing.
(a) Turn on electrical supply and adjust
panel to ‘heat’ mode.
(b)
Check that burner goes through correct
ignition sequence and goes to ’lock-
out’.
(c)
Adjust panel to ‘off’ mode. If the burner
does not go to lockout DO NOT
PROCEED until the fault has been
correctly identified and repaired.
(d) Switch on the oil supply and connect a
suitable pressure gauge to the pump
on the heater.
(e) Adjust panel to ‘heat’ mode and reset
the control box from lockout. The
burner will start and a pressure will be
indicated on the oil gauge. N.B. : it
may be necessary to purge the oil
pump of air before pressure is
indicated on the gauge. Check this
value is in line with the technical
specification in section 2. If not adjust
accordingly. See burner manual
accompanying this manual.
(f) Using approved and calibrated
combustion analysis equipment
measure the percentage CO
2
. CO,
gross flue temperature and ambient
temperature.
(g) If the CO
2
levels do not correspond to
the technical specification in section 2
adjust the primary air damper, more
open for less CO
2
and more closed for
more CO
2
, until the correct level has
been obtained. The CO2 level on site
must be in the range of the figures
given in table 2.1.
(h) Re-check all readings and enter on the
commissioning sheet.
(i) From readings calculate the net
efficiency of the unit. This is not to be
less than 84%.
(j)
The operation of the fan/limit stat is
checked as follows :
*for types 100-300
(direct driven
blowers) : by depressing and holding
the main fan starter overload button.
*for types 400-1000
(V-belt driven) :
by removing the red wire of the fan
stat.
This will stop the main fan without
stopping the burner. After 3 minutes
the burner will stop.
(k) If the burner has not stopped release
the button and allow the main fan to
cool down the heater. Then check the
following:-
- Fan & limit stat settings are correct.
- The bi-metal strip has not been
damaged.
- The bi-metal strip casing is not in
contact with the heat exchanger
body.
(l)
Adjust time periods and temperatures
to ensure that the burner operates
when required by the controls.
(m) Adjust panel to ‘off’ mode’. . Note the
time it takes for the fan to stop,
approximately two minutes, thus
ensuring the fan side of the fan/limit
stat is operating correctly.
(n) Complete the commissioning sheet
and return a copy to the Service
Department.
In the event of any problems occurring
during the commissioning process, which
cannot be properly, rectified please consult
the Technical Department of Ambi-Rad
Limited.
5.3 Commissioning
Outlets
For free standing heaters it is essential to
ensure that the nozzled outlet louvres
(discharge or plenum louvres) have been
adjusted to the required angle of discharge
and have been rotated to give the optimum
distribution of air throughout the premises.
Take care to avoid the short cutting of hot air
back into the fan system, i.e. when installed
close to a wall, as this can lead to a
nuisance overheating condition.
Securely fix all nozzle outlets after final
adjustments have been made.
