BENSON VRC-3 100-3, Инструкция по установке, обслуживанию и эксплуатации

Страница: 32 / 35

1704VRC3-AMEN, p 32/35
USER INSTRUCTIONS
Operating
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, the heat is sensed by a thermally actuated fan control which switches on the 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 which 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.
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 an 'ON' cycle.
4. Adjust control/room thermostat to desired temperature.
5. Air heater will light automatically when the room thermostat calls for heat after about 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 inside panel of the
appliance and on a remote control if fitted. Reset by pushing reset/button inside the 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.
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 re ‐ circulated.
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 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.
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
services 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 your distributor.
NEVER SWITCH OFF ELECTRICTY SUPPLY TO THE AIR HEATER WITHOUT FIRST CLOSING THE GAS ISOLATING TAP.
12