1611UDSBD-3GBEN, Pag. 21/36
Operating
instructions and
operating sequence
Check installation
after start-up
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
fi ve (5) minutes to clear out any gas. Then smell for gas, including near
the fl oor. 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
fi tted, 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).
Note :
If the appliance does not operate, follow the instructions “To turn off gas
supply at the Appliance” printed below and call your service technician.
9. Thermostat calls for heat, energyzing the venter motor.
10. When adequate air fl ow for combustion is proven by an air proving switch
and a prepurge period has elapsed, the integral ignitor and multifunctional
gas control operate. The ignition spark ignites the gas creating the burner
fl ame.
11. Burner fl ame is sensed by a fl ame rod sensor and when the heat exchanger is
warmed up (+/- 30 seconds) and the fan time delay relay closes, the blower
motor is energized.
12. If the fl ame is extinguished during the main burner operation, 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 blower 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 loca-
tion near the heater or give this information to the end user.
