I-UDSA-UK (02-19) PN 06 00116 UDSA R3, page 13
1. Set thermostat to the lowest setting.
2. Turn off all electric power to the heater.
3. Shut the gas cock at the inlet of the unit.
4. Wait five (5) minutes to clear out any gas. Then smell for
gas, including near the floor. If you smell gas, STOP! and
follow the steps in the WARNINGS printed on page 3. If you
do not smell gas, proceed to the next step.
5. Turn on the electric power to the heater.
6. Open the gas cock at the inlet of the unit.
7. If fitted, ensure that a time switch is set to an ‘ON’ period.
8. Adjust the thermostat to the required setting (must be above
current room temperature).
Check installation prior to startup
Check suspension. Unit must be secure. Verify that no
other parts are fitted which are not individually supported
and secured.
Check clearances from combustibles. Requirements are in
section 5.
Check vent system to be sure that it is installed according
to the instructions in section 7, venting requirements.
Check piping for leaks and proper gas line pressure. Bleed
gas lines of trapped air.
Check electrical wiring and ensure that wiring conforms
with the wiring diagram. Be sure all wire sizes meet
requirements.
Check polarity. Verify that line voltage exists between the
black “L1” and earth ground.
Verify that the appliance is earthed by conducting an earth
continuity test.
Heater startup
•
This heater does not have a pilot flame. It is equipped
with an ignition device which automatically lights the
burner. Do not try to light the burner by hand.
• Ensure that all pressure test points (on the gas valve and
manifold) along with the pilot outlet plug (see Figures 9
and 10, item 6) are fully closed and gas tight.
• Before operating, smell all around the heater area for
gas. Be sure to smell next to the floor because propane
gas is heavier than air and will settle near the floor.
• Do not use this appliance if any part has subjected
to water ingress. Immediately call a qualified service
technician to inspect the appliance and to replace any
part of the control system and any gas control.
• When overheating occurs or when gas supply is not
turned off, shut the manual gas tap before turning off
the electric power.
12
STARTUP
Warning: For your safety, follow the instructions
exactly otherwise damage or injury could occur.
Operating instructions and operating sequence
If the appliance does not operate, refer to and follow
the instructions in TO TURN OFF GAS SUPPLY AT THE
APPLIANCE below and call your service technician.
9. Thermostat calls for heat, energizing the venter motor.
10. When adequate air flow for combustion is proven by an
air proving switch and a prepurge period has elapsed,
the integral ignitor and multifunctional gas control op-
erate. The ignition spark ignites the gas creating the
burner flame.
11. Burner flame is sensed by a flame rod sensor and when
the heat exchanger is warmed up (+/- 30 seconds) and
the fan control relay closes, the fan motor is energized.
12. If the flame is extinguished during the main burner opera
-
tion, the integrated control system closes the main valve
and attempts to relight the burner. The unit will attempt
5 ignitions before entering a “lock out” mode. Lock out
is indicated by the red warning light on the heater. To
end this mode push on the reset switch.
13. To turn the heater ‘OFF’ for short periods : adjust the
room thermostat to its lowest setting or ‘OFF’. The fan
will continue to run to cool the heater and then switch
off automatically.
14. To turn the heater ‘OFF’ for long periods : see ‘To turn
off gas supply at the appliance’ below.
TO TURN OFF GAS SUPPLY AT THE APPLIANCE
1) Set thermostat to the lowest possible setting or ‘OFF’
position.
2) Shut off the gas tap when the fan has stopped.
3) Switch off electric power to the appliance.
Check gas pressure as described in detail below.
Turn the unit off and on, pausing 2 minutes between each
cycle. Observe for smooth ignition.
Set the thermostat to the required room temperature.
Place this booklet and any control or optional information
in an accessible
location near the heater or give this information to the
end user.
Check installation after startup
