If the Draught Diverter is not accessible:
a.
Introduce smoke, by means of
part
of a smoke pellet on a non-combustible support, into the heat
exchanger.
b.
Extinguish the Main and Pilot burners.
c.
Ensure that there is no spillage evident by visually observing the draught diverter location on the air
heater.
d.
If spillage is evident, further investigation and rectification is required before re-testing the appliance.
WARNING: The appliance shall not be left connected to the gas supply unless it has successfully passed
the above spillage test.
6.8.3
Turn OFF the gas supply at the service cock and ensure that the Multifunctional Control fail-safe operates within
60 secs (indicated by loud click from Multifunctional Control).
6.8.4
Turn gas supply ON at service cock.
6.8.5
Switch the appliance electrical supply OFF.
6.8.6
Disconnect the fan voltage selector flying lead at the electrical control panel.
6.8.7
Switch the appliance electrical supply ON.
6.8.8
Ignite the Main and Pilot burners as detailed in sub para 6.4.1 to 6.4.8
6.8.9
Ensure that the Limit Switch operates, indicated by the Pilot and Main Burners extinguishing, within 120 and 180
seconds.
6.8.10 Switch the appliance electrical supply OFF.
6.8.11 Reconnect the fan voltage selector flying lead..
6.8.12 Switch the appliance electrical supply ON.
6.8.13 Re-ignite the Pilot burner as detailed in sub-paras 6.4.5 and 6.4.6
6.8.14 Ensure that the Main Burner re-ignites when the appliance temperature reduces, (note: with the fan having been
disconnected, there may be some delay before the Main Burner re-ignites).
JU78
JU117
JU156
kW
MJ/h
Btu/h
kW
MJ/h
Btu/h
kW
MJ/h
Btu/h
INPUT
29.3
105.5
100,000
43.7
157.3
149,000
58.0
208.8
198,000
OUTPUT
22.9
82.4
78,000
34.3
123.4
117,000
45.7
164.5
156,000
Gas rate cv
2.78m
3
/h (98.0ft
3
/h)
4.14m
3
/h (146.1ft
3
/h)
5.49m
3
/h (194.1ft
3
/h)
1020Btu/ft
3
Burner setting
12.5mbar (5.0 in wg)
12.5mbar (5.0 in wg)
12.5mbar (5.0 in wg)
pressure (hot)
Main Injector
BRAY CAT 33/1250
Table 4
Main Burner Pressure Settings
ZZ602/6
10
AIRFLOW (cfm)
Table 5
Fan Performance Curve
ZZ602/6
9
1.
Start button
2.
Off button.
3.
Burner Pressure adjuster.
4.
Outlet Pressure test point
5.
Pilot Adjuster
Fig. 4
Multifunctional Control
6.6
EXTINGUISHING OF BURNERS AND TEMPERATURE RISE TEST:
6.6.1
At the Multifunctional control press the OFF button and ensure that both the Main and Pilot burners extinguish.
6.6.2
Remove the pressure test gauge from the Multifunctional Control and refit the Outlet Pressure test point cover.
6.6.3
Ignite the Pilot and Main burners and allow to operate for 15 minutes to ensure stability.
6.6.4
With the main burner operating continuously, check that the temperature rise across heater is between 45
o
C -
55
o
C, setting the fan speed accordingly, (decrease fan speed to increase temperature rise). The fan speed is
adjusted by selecting the fan speed at the control panel (decrease voltage selection to decrease fan speed).
6.7
AUTOMATIC CONTROLS CHECK
6.7.1
Set the TIME CONTROL to ‘
ON
’.
6.7.2
Turn the Thermostat slowly clockwise until the Main burner ignites.
6.7.3
Ensure that the fan starts to operate after a short period (approx. 1-2 minutes).
6.7.4
When the temperature reaches the control setting, ensure that the Main burner extinguishes followed by the fan
switching off after a short period.
6.7.5
When temperature falls below control setting, ensure Main Burner re-ignites followed by fan operation.
6.8
SAFETY CHECKS:
6.8.1
Check for gas soundness within the appliance.
6.8.2
Spillage test:
Carry out a full spillage test as follows, and ensure that the flue operates effectively with all doors
closed and any extractor fans in operation.
NOTE:
If an extractor fan is situated in an adjoining or adjacent room, carry out the spillage test with the interconnecting
doors open.
If the draught diverter is accessible:
a.
Introduce smoke into the draught diverter adjacent to an exit from the heat exchanger, by means a smoke
match or puffer.
b.
Ensure that there is no spillage present (indicated by displacement of smoke downwards and out of the
draught diverter.
1
2
3
4
5
125
100
75
50
800
1000
1200
1400
1600
EXTERNAL
JU78,
JU78,
JU1
17,
JU1
17,
JU156,
JU156,
