Servicing - BENSON RS UHA Assembly And Use Manual

The heater is supplied with horizontal louvres only
vertical louvres are available as an option and locate
inside the horizontal louvre plenum.
45°
To switch ON the heater

Switch the fused isolator switch ON (supply
customer)

Switch the heater ON/OFF selector to "ON"

Turn the thermostat to the desired temperature

The heater will start automatically
To switch OFF the heater

Turn the thermostat to its lowest temperature
setting or alternatively switch the heater ON/OFF
selector switch to OFF

The burner will switch off but the fan will continue
to operate for 3 to 4 minutes to cool the
combustion chamber before stopping

Finally switch the fused isolator to OFF
To switch ON fan only

Switch the fused isolator to ON

Set ON/STANDBY switch to ON

Set VENT/HEAT switch to VENT position

The fan only will run
It is a requirement that only qualified personnel are
allowed to carry out installation commissioning or
servicing. In addition only spare parts recommended
by the manufacturer may be fitted, and the installer
should provide a list of recommended spare parts
that are available through the manufacturer or his
agent
Before commencing any maintenance or servicing
work the heater must be shut down and allowed to
cool, and have the gas and electric supplies to it
turned off at the supply cock and isolator
respectively.
Always test for gas soundness after completing any
service work particularly if this has necessitated the
removal and / or replacement of gas carrying
components
It is advisable that routine inspections are carried
out on a frequent basis, servicing must also be
carried out regularly, and in accordance with the
manufacturers recommendations i.e. at a maximum
interval of one year. In certain applications the
REGULATING THE AIR FLOW
OPERATION

SERVICING

15
HORIZONTAL
Ensure that the horizontal louvres are set so as to
evenly distribute the air in the area to be heated they
should be opened at a minimum of 45 degrees
This will ensure that there is sufficient air flow over the
chamber and will avoid nuisance overheat lockout
For this reason it is also important to ensure that the
vertical louvres if fitted are also open
To switch OFF fan

Set ON/STANDBY switch to STANDBY
Stop

Turn the selector switch to STOP
IF HEATER IS TO BE SWITCHED OFF FOR A LONG
PERIOD

Set ON/STANDBY switch to STANDBY

Isolate at mains electrical supply

Isolate the gas supply
WARNING! UNLESS IN AN EMERGENCY
Never stop the heater by switching off at the
mains isolator. The residual heat accumulated
in the heat exchanger may trigger the LIMIT
safety device resulting in the need to reset
manually.
If this is repeated it will damage the heat
exchanger and will invalidate the warranty on
the heater
frequency of servicing will have to be increased,
this to a large extent is governed by the working
environment, and both the manufacturer and the
installer will be able to offer further advice.
It is advisable that routine inspections are carried
out on a frequent basis, servicing must also be
carried out regularly, and in accordance with the
manufacturers recommendations i.e. at a maximum
interval of one year. In certain applications the
frequency of servicing will have to be increased,
this to a large extent is governed by the working
environment, and both the manufacturer and the
installer will be able to offer further advice.
CLEAN EXTERNAL PANELS
This cleaning should only be carried out with damp
cloths with soap and water. If there are stubborn stains
dampen. The cloth with a 50% mixture of water and
white spirit
After cleaning dry the surfaces carefully