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UHD LOW PROFILE DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL
26 of 47
SECTION 11: OPERATION AND MAINTENANCE
Read this manual carefully before installation,
operation, or service of this equipment. All
components are accessed via the door secured by
sheet metal screws with grounding strap. Opening
the door exposes live electrical connections and hot
components.
11.1 Pre-Start-Up Checks
All pre-start-up checks must be carried out before
lighting the heater.
Ensure that the heater and all controls are suitable
for the gas, pressure and electrical supply to which
they are to be connected.
11.1.1 Electrical Checks
1. Check that all site wiring is connected in
accordance with the appropriate wiring diagram
on Page 23, Section 10.3.
11.1.2 Gas Supply
All aspects of the gas installation including the gas
meter must be inspected, tested for gas tightness
and purged in accordance with local and national
codes.
Ensure that the air is fully purged from the heater
inlet pipe up to the main gas valve inlet test nipple.
11.1.3 Mechanical Checks
1. Check that the flue (and air intake for separated
combustion units) is installed in accordance
with the instructions in this manual and local
regulations. See Page 12, Section 7.
11.2 Begin Start-Up
11.2.1 Before Operating the Heater
To ensure that all the controls are in safe working
order, operate the heater for the first time with the
isolating gas valve turned off and power supply
turned on.
1. Turn off the isolating gas valve.
2. Turn up the thermostat above room
temperature. The automatic ignition
sequence will now begin as described
on Page 27, Figure 15.
There will be no ignition of the burner and lockout
will occur, which proves the controls are operating
correctly.
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.