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10.0 GAS CONVERSION
10.1
Reznor RHC 8000(M) RJL air heaters are designed
to operate on natural, propane or butane gas and
will be supplied fitted for the gas type ordered. In
the event of site conversion to a different gas type it
is necessary to convert the gas burner and burner
controls.
10.2
Affix new data plate and gas type over-sticker.
10.3
Upon completion of conversion re-commission the
air heater in accordance with section 5 of this
document.
10.4
Changes to carry out :
natural gas : use Honeywell VR4601AB (PN 03
25136) - set pressure regulator as per table 2A
propane/butane : use Honeywell VR4601B (PN 03
25136B) or VR blocking plate
To adapt gas injectors and gas inlet pressures, we
refer to table 2A (page 4)
11.0 USER INSTRUCTIONS
OPERATING
How the air heater works:
Gas is burned by an atmospheric burner that 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, the
heat is sensed by a thermally actuated fan control which
switches on the fan (in case there is no constant running fan)
when the air temperature has reached its preset operating
level.
At the end of a heating cycle the burner is switched off, the
air circulation fan will continue to run until the air heater has
cooled to a safe condition. Thereafter the fan will remain off
until the next cycle is initiated.
Safety:
1. Flame failure is detected by the ionization probe
which is the sensor and will immediately result in gas
valve shut down.
2. Safety against overheating is assured by two overheat
controls. The first is an automatic recycle control, which
protects against low air flow i.e. clogged air ways, fan
failure etc. The second, which is set to a higher level
than the first one, 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.
To light the heater:
1. Turn on the gas supply to the air heater.
2. Switch on the electricity 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 after +/- 30 sec.
6. If the appliance does not light:
a)
check that the burner control does not require
resetting. An indicator light glows at the back panel of the
appliance and on a remote control if fitted. Reset by
pushing reset/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 return
air temperature near the heater is less than 30°C,
then switch off the appliance and call for service.
If
the return air temperature is over 30°C, take appropriate
action to reduce the ambient temperature near the air
heater.
Air circulation:
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.
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.
NEVER SWITCH OFF ELECTRICTY SUPPLY TO THE AIR
HEATER WITHOUT FIRST CLOSING THE GAS TAP
