1307SDH_RDH--EN,
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USER INSTRUCTIONS
15.1 Operating:
How the air heater works:
Gas is burned by an atmospheric burner which fires into a heat
exchanger. The gas burner is controlled by a double gas valve
via an electronic burner control, which is actuated automatically
via external controls i.e. a room thermostat and/or a time switch.
The burner is ignited by a spark igniter. When the burner fires
and warms the heat exchanger, a time delay relay is activated
and switches on the fan after maximum 60 seconds.
At the end of a heating cycle the burner is switched off, the air
circulation fan will continue to run until 120 seconds after heat
demand. Thereafter the fan will remain off until the next cycle is
initiated.
Safety:
1.
Flame failure is detected by the flame sensor which will
immediately result in gas valve shut down.
2.
Safety against overheating is assured by a overheat
control. This is a control that locks out and switches off
the burner in the event of gross overheating for any
reason. Manual intervention is necessary to reset this
control device. Resetting of the automatic burner control
may also be required.
3.
The location of the air heater should be maintained at
normal atmospheric pressure. Changes to the building
after air heater installation, should have regard to the
heating installation, i.e. structural changes causing
excessive draughts from doors, windows etc. Other air
handlers and installation of air extraction equipment,
which may cause a negative pressure environment, can
seriously affect the operation of this type of air heater,
especially if combustion air supply is not ducted.
15.2 To light the heater
1.
Switch on the electricity supply to the air heater.
2.
Turn on the gas supply to the air heater.
3.
Ensure time switch (if fitted) is set to a 'ON' cycle.
4.
Adjust control/room thermostat to desired temperature.
5.
Air heater will light automatically when the room
thermostat calls for heat.
6.
If the appliance does not light:
a)
Check if the burner control does not require resetting.
An indicator light glows at the front panel of the
appliance and on a remote control (if fitted). Reset by
pushing light/button on appliance or the remote control.
b)
check if thermal overheat control requires resetting
7.
If the thermal overheat control requires resetting and
doing so restarts the air heater, wait until the appliance
warms to thermal equilibrium, to ensure the overheat
control does not lock out again.
If it does and the
temperature near the heater is less than 30°C, then
switch off the appliance and call for service.
If the
temperature is over 30°C, take appropriate action to
reduce the ambient temperature near the air heater.
15.3 Air circulation:
1.
The space heating process is for air to be circulated
through the appliance whereby it gains heat from a heat
exchanger. The air is directly discharged into the space
to be heated. The air is eventually recirculated.
Therefore it is very important that an unobstructed path
for the circulation of the air will be maintained. This is
particularly important if the air heater has been installed
to blow through the wall between two rooms.
2.
Sometimes the air circulation fan of the appliance is
connected to a remote over-ride switch. This enables
cool air to be used for circulation purposes when the air
heater is not used for heating purposes e.g. in summer.
To use this feature:
a)
switch ON electricity
b)
switch ON manual override switch, this may be fitted
as a feature on a remote composite control.
15.4 Maintenance
1.
Maintenance and service must only be carried out by
appropriately qualified persons e.g. "Corgi" registered
undertakings.
2.
It is in your interest to ensure proper service and
maintenance is carried out at a regular basis. Periods
between service are dependent upon the local
environment where the heater is installed. All gas
appliances should be serviced at least once a year.
3.
In case of any damage to the appliance, it must be shut
down completely and checked by an appropriately
qualified person.
4.
In the event of difficulties in resolving any of these
matters, please do not hesitate to contact Reznor or
their official distributor.
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