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Roberts Gorden 75 User Manual

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SECTION 12: U
SER
 I
NSTRUCTIONS
29 of 47
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 - 
See Page 30, Section 12.3. 
See Page 41, Figure 15.3 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 box 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 access 
door of the heater. 
See Page 41, Section 15.3. 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.