14/25
Figure 7 : Honeywell gas valve
Legend :
1 Gas valve HONEYWELL VR4601AB
2 Inlet pressure gas test point
3 Burner pressure gas test point
4 Burner pressure regulator cover
5 Burner pressure regulator
6 Electrical connection 230V
6.7 Air distribution system
Adjust the air outlet discharge louvres to provide a
satisfactory spread of the warm air. Direct the air
towards the floor avoiding blowing directly on people
who may be in the vicinity of the appliance.
If louvre adjustment is carried out whilst
the appliance is hot wear gloves to avoid
being burnt.
6.8 Air heater controls and operation
Check air heater operation after all adjustments have
been carried out. Set the temperature control above
ambient temperature.
LCSA-4 air heaters are fitted with a pressure
sensitive, combustion air safety control that monitors
the combustion airflow.
The control operates with the settings given in table
10 (settings are for sea level installations)
When the combustion air safety control closes,
verifying airflow, the gas control valve will open and
the burner will light. When insufficient airflow, the
burner will extinguish until the airflow returns to the
acceptable level.
Wait approximately 30 seconds after the burner has
lit, the time delay relay will activate the thermal fan
control which will energize the fan motor. Continue to
operate the air heater for several minutes to ensure
correct operation.
Turn room thermostat to its lowest setting. The main
burners should extinguish while the fan continues to
run to cool the air heater. The fan delay relay will
normally be de-energized and stop the fan motor in
approximately 45 seconds.
Table 10 Combustion air pressure control settings
LCSA-4
Normal
equilibrium
warm (Pascal)
Set point 'off'
(Pascal)
12
>131
119
20
>163
135
30
>170
130
35
>200
155
45/50
>183
155
60
>240
175
75
>290
185
100
>250
210
120
>250
238
145
>250
238
at 2x1m pipe with terminal
6.9 Handing over
Upon satisfactory completion of commissioning and
testing, hand the instructions to the user or their
representative.
Advise the appropriate person how to safely use and
operate the air heater and describe the use of
appropriate external controls. Ensure that the
person understands how to start the heater and how
to turn it OFF.
Suggest that the instructions are placed close to the
air heater for future reference. In the absence of an
appropriate location fix them to the gas service
meter. Ensure they are not placed where they may
restrict the airflow from the heater or where they
may catch fire from a hot surface.
Advise the person who is resuming responsibility
that for continued safe operation the air heater
should be serviced at least once a year.
