Nortek Reznor VRA-4E Series, Установка, пусконаладка, обслуживание

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1712VRA ‐ 4EGBEN, pag.. 10/25
4.4 Gas connection 4.5 Electrical connections
Do not use the appliance gas
supply to balance or support
any part of the appliance
.
Connection to a gas network may only be carried
out by appropriately qualified persons. The gas
installation must comply with the rules in force
using materials appropriate for gas installation.
To facilitate servicing, the air heater must be
fitted with an approved gas service tap and union
fitting or union tap adjacent to the appliance.
The inlet gas supply line must be installed so as
to permit the access door to be opened and to
allow removal of the slide out burner assembly.
Air heaters suspended by flexible suspension
materials or drop rods must be connected to the
gas supply using an approved flexible connector.
Sufficient slack must be provided in the
connection to allow for movement of the
appliance. Use a flexible connector of suitable
size to reduce the pressure drop and the
possibility of gas flow noise.
Figure 6
AIR DISTRIBUTION
VRA-4E air heaters are fitted with adjustable
horizontal louvers over the range 0 - 45 degrees
from the horizontal so as to be able to direct the
airflow downwards.

DO NOT ADJUST THE LOUVRES BEYOND THEIR
STOPS .
1 Gas tube inlet sealing ring
2 Inlet gas pipe
3 Union fitting
4 Gas service tap
5 Gas pipe
4.5 Electrical connection
ATTENTION
THIS APPLIANCE MUST BE EARTHED !
IMPORTANT: If the reset button requires activating
for any reason the cause should be identified before
resetting. After resetting stay with the appliance for
long enough to ensure that lock-out does not
reoccur (suggest 5 minutes).Fix all electric cables
and installer’s wiring to the control panel and ensure
they do not touch the combustion collector box.
The electrical installation may only be carried out
by appropriately qualified persons observing the
rules in force. All electrical connections should
be made in the heater control compartment (refer
to figure 9). Screw type terminals are provided.
Connections should be in accordance with the
terminal markings and the wiring diagram affixed
to the air heater or included with this document.
The minimum external controls required for the
air heater are a room thermostat.
It is essential
the main input line and neutral to terminals L
and N remains live at all times even when the
appliance is switched off this is to ensure
correct operation of the unit.
An indicator light and burner reset button are
fitted inside the appliance. To add a remote reset
button, make connections to the terminals in the
electric box as indicated on the wiring diagram.
4.6 Room thermostat location
Do not attempt to control more than 1 air
heater from a room thermostat or control
panel unless a properly wired relay is fitted.
Follow instructions supplied with such
panels.
The location of the room thermostat is important.
It should not be fitted on an outside wall. Avoid
location in draughty areas or where it may be
influenced by heat sources e.g. the sun, process
plant, etc. The thermostat or temperature sensor
should be mounted on a vibration free surface
and mounted about 1,5 metres above floor level.
Follow the thermostat manufacturers fitting
instructions. The thermostat must be suitable for
switching 230 volts.
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