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 of 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.
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.
e.
Repeat spillage tests but with the fan running, or Summer Airflow switch set to ON.
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 Air Circulation Fan at the flying lead socket.
6.8.7
Switch the appliance electrical supply ON.
6.8.8
Ignite the Pilot and Main Burners as detailed in 6.3.1 to 6.3.5.
6.8.9
Ensure that the Limit Switch operates, indicated by the main burner extinguishing, within 120 and 180 seconds.
6.8.10 Switch the appliance electrical supply OFF.
6.8.11 Reconnect the Air Circulation Fan.
6.8.12 Switch the appliance electrical supply ON.
6.8.13 Ensure that the Main Burner re-ignites when the appliance temperature reduces, (note: with the Air Circulation Fan
disconnected, there may be some delay before the Main Burner re-ignites).
kW
MJ/h
Btu/h
INPUT
11.1
40.0
38,000
OUTPUT
8.30
29.88
28,320
Gas rate
0.418 m
3
/h
Propane G31
(14.77 ft
3
/h)
Burner setting
33 mbar (13.2 in wg)
pressure (hot)
Main Injector
Bray 1.78mm
10
Table 4
Main Burner Pressure Settings
11
Table 5
Fan Performance Curve
7.
INSTRUCTIONS FOR USERS
7.1
If the building is unoccupied, ensure that the Instructions for User are left taped to the air heater for the User, and
Installation Instructions are left at or near the air heater for use on future service calls.
7.2
If the building is occupied, hand the User Instructions over and ensure the User understands:
7.2.1
How to ignite the pilot and burner.
7.2.2
How to operate the room thermostat, time and heater ON/OFF switch and summer air circulation switch, and that the
time control must be reset following a power failure.
7.2.3
How to extinguish the pilot and main burner at the Multifunctional control, and switch off electrical supply to the
heater.
7.2.4
How to remove, clean and refit the air filter and at what intervals (i.e. fortnightly, or for new houses, weekly).
7.2.5
How to control the heating system by opening and closing warm air outlets.
7.2.6
How to obtain summer air circulation.
7.2.7
That the air grilles on the heater or heater compartment; grilles and ventilators in the walls, windows or doors of the
building must not be obstructed.
7.2.8
That the heater must be serviced at least once a year by a competent person to ensure efficient and safe operation.
7.2.9
That the red instructions for safe use have been pointed out and understood.
7.2.10 That expert help must be obtained if persistent failure of the pilot burner occurs.
8.
MAINTENANCE
IMPORTANT: Ensure gas and electricity supplies are isolated before commencing any maintenance or replacement of compo-
nents. After completion of any maintenance, always test for gas soundness and carry out a complete functional test of the appli-
ance in accordance with Commissioning Instructions at Sect 6.1 to 6.8 inclusive.
8.1
ROUTINE MAINTENANCE:
8.1.1
Operate the appliance and check for the correct function of the burner and controls.
8.1.2
Turn OFF the gas and electrical supplies to the appliance.
8.1.3
Remove the air heater front panel.
8.1.4
Remove and check the return air filter/cleaner for cleanliness, remove and clean the Air Circulation fan as
detailed in para 8.7.
8.1.5
Remove the Burner and Controls Assembly as detailed in para 8.2. Inspect and clean the main burner and injector
as necessary. Examine the main burner for cracks, including hairline cracks, exchanging the burner as necessary.
8.1.6
Inspect and clear the pilot burner orifice.
8.1.7
Clean the heat exchanger flueways by thoroughly brushing from above and below.
8.1.8
By viewing through the Fan Aperture, and using a torch or similar, examine the heat exchanger externally for signs
of cracks or holes, particularly around welded joints.
200
250
300
350 400 ft
3
/min
0.09
0.12
0.14
0.17 0.19 m
3
/sec
AIR VOLUME
mbar
in.wg.
0.50
0.20
0.375 0.15
0.25
0.10
0.125 0.05
RESIST
ANCE EXTERNAL
T
O
HEA
TER
100V
120V
150V
175V
210V
