UHD L
OW
P
ROFILE
D
UCT
F
URNACE
I
NSTALLATION
O
PERATION AND
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ERVICE
M
ANUAL
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SECTION 12: USER INSTRUCTIONS
The UHD[X][S] Series heaters are fully automatic
and operate from the external controls fitted on site.
The only user control at the heater is the Manual
Reset Limit Switch -
for manual reset limit
switch location inside control housing.
12.1 Heater Operation
When the heater has been switched on by the
thermostat installed on site, the main burner will
automatically turn on.
The burner control module will control the safe
ignition of the flame.
All heaters require a constant gas and electricity
supply which must not be interrupted during the
normal operation of this heater.
12.2 Common User Controls
12.2.1 Manual Reset Limit Switch
The limit thermostat is located inside the hinged
access door of the heater.
. This control protects against excessive heat
build-up inside the burner compartment.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater must be
connected to a properly
grounded electrical
source.
WARNING
Explosion Hazard
Do not make more than one attempt to
restart the heater if manual reset limit switch
locks out.
The vent or heat exchanger may be blocked.
The fault must be traced and repaired.
Failure to follow these instructions can
result in death, injury or property damage.
