11
22
mbar in.wg.
0.50
0.20
0.375 0.15
0.25
0.10
RESIST
ANCE EXTERNAL
T
O HEA
TER
Response
Area
Table 5
Fan Performance Curve
350
400
450
500
550
600 ft
3
/min
0.165
0.189
0.212
0.236
0.256
0.283 m
3
/sec
AIR VOLUME
Fig. 6a
Modairflow Circuit Diagram
6.8.4
Turn the gas supply ON at service cock.
6.8.5
Switch the appliance electrical supply OFF.
6.8.6
Disconnect the fan at the flying socket
6.8.7
Switch the appliance electrical supply ON.
6.8.8
Ignite the Main and Pilot Burners as detailed in sub para 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 Heater 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 fan disconnected, there
may be some delay before the Main Burner re-ignites).
7.
INSTRUCTIONS FOR USERS
7.1
If the building is unoccupied, ensure that the Instructions for the User are left taped to the air heater, and that the Installation,
Commissioning and Maintenance 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 Main Burners.
7.2.2
How to operate the Thermista-stat/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 the 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 weekly for new houses.)
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.
