Nortek Reznor VRA-4E Series, Installation, Commissioning, Servicing

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1712VRA ‐ 4EGBEN, pag.. 3/25

This appliance is not intended for use by persons (including children) with reduced
sensory or mental capacities or lack of experience and knowledge unless they have
been given supervision or instructions concerning use of the appliance by a person
responsible for their safety. Children should be supervised to ensure that they do not
play with the appliance.

Should overheating occur or the gas supply fails to shut off, shut off the manual gas
valve to the appliance before shutting off the electrical supply.

Gas-fired appliances are not designed for use in hazardous atmospheres containing
flammable vapours or combustible dust, in atmospheres containing chlorinated or
halogenated hydrocarbons or in appliances with airborne silicone substances.

The manual should be kept in a safe place for future reference.

Unauthorised modification of this appliance or departure from use in the manner, for
which it was intended by the manufacturer or installed in a manner contrary to these
instructions, may constitute a hazard and jeopardize all warranties.
Deviations should only be carried out after formal consent has been obtained from
the
manufacturer.

The electrical isolator should only be used in an emergency and should not be used for
closing down the main burner, as it switches off the fan prematurely and may damage
the heat exchanger, invalidating the warranty.

Use only factory-authorized parts when replacement is required.

In case of persisting problems, contact your distributor
INTRODUCTION
1.1 Basic Information
The instructions in this manual apply to Model
VRA-4E gas-fired/fan-assisted warm air heaters.
These models have an axial fan for air delivery.
These heaters are designed for overhead
suspension and are suitable for indoor installation
only installed at an operation ambient
temperature between -15°C and 45°C.
When installed as a type C12/C32 and where the
height above floor level is greater than 1,8 metres
measured to the underside of the appliance they
may be used as a garage air heater. This
appliance must be installed in accordance with
the rules in force.
Before installation, check that the local
distribution conditions, nature of gas and
pressure and adjustment of the appliance are
compatible. A permanent electricity supply of 230
volts, 50 Hz, single phase is required.
Heaters are approved for:
Type C
12
- horizontal vent for balanced-flue
heaters;
Type C
32
- vertical vent for balanced-flue heaters;
Type B
22
- vertical vent;
Category II
2H3 +
for GB and IE
When the external control calls for heat, an
electronic control begins the ignition sequence to
provide for a safe start. About 30 seconds after
the call for heat, the fan will begin circulating
warm air. The electronic control will supervise the
flame during the entire heating cycle to ensure
safe operation. When the required room
temperature is reached, the main burner will shut
down leaving the fan running to cool down the
heat exchanger. After approximately 45 seconds,
the fan delay relay will turn off the fan.
1.2 Warranty
Warranty is void if:
a) VRA-4E heaters are installed in atmospheres
containing flammable vapors or atmospheres
containing chlorinated or halogenated
hydrocarbons or atmospheres containing any
silicone, aluminum oxide, etc., that adheres
to spark ignition flame sensing probes.
b) The installation is not in accordance with
these instructions.
c) Axial fan-type unit heater is connected to a
duct system or fitted with a non-authorized
air distribution device.
1
WARNINGS