Reznor UEAS Unit Installation Manual - Manual (Page 34)

Operating Instructions and Operating Sequence
1. Set thermostat at lowest setting.
2. Turn off all electric power to the appliance.
3. This appliance is equipped with an ignition device which automatically lights
the burner. Do not try to light the burner by hand. Open the access door
and locate the gas control (ON/OFF) switch or knob on the gas valve. (See
FIGURE 26.)
4. Turn the gas control switch to “OFF” or the knob clockwise to “OFF”.
5. 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 above or on the Operating Label on the heater. If you do not smell gas,
proceed to the next step.
6. Turn the gas control switch to “ON” or the knob counterclockwise to “ON”.
7. Close the access door.
8. Turn on the electric power to the heater.
9. Set the thermostat to the desired setting.
NOTE: If the appliance does not operate, follow the instructions “To Turn Off Gas
to Appliance” printed below (and on the Operating Label on the heater) and call
your service technician.
10. Thermostat calls for heat, energizing the venter motor.
11. Venter pressure switch closes, firing the unit.
12. Burner flame is sensed, and in 30 seconds after the gas valve is energized,
the fan motor is energized.
13. If the flame is extinguished during the main burner operation, the integrated
control system closes the main valve and must be reset by interrupting
power to the control circuit. (See lighting instructions on the heater.).
TO TURN
OFF GAS
TO THE
APPLIANCE
1) Set thermostat to lowest setting
2) If service is to be performed, turn off all
electric power to the appliance.
3) Open the access door.
4) Turn the gas control switch “OFF” or the
knob clockwise to “OFF” (Do not force.)
5) Close the access door.
FIGURE 26 - Gas Valve
Gas Control
Knob
(shown in the
ON position)
Gas
Flow
Gas
Flow
Top View
Side
View
Top View
ON/OFF Switch
11.0 Commissioning
and Startup
(cont’d)
11.3 Check Installation
After Startup
□ With the unit in operation, measure valve outlet gas pressure. See
information and instructions in Paragraph 7.1.3. If operated at high
altitude, be sure to adjust outlet gas pressure for altitude.
□ Turn the unit off and on, pausing two minutes between each cycle.
Observe for smooth ignition.
□ Place the packet of information containing the Limited Warranty, this
booklet, and any control or optional information in an accessible location
near the heater.
DANGER:
The gas burner in this gas-fired equipment is designed and equipped to provide safe
controlled complete combustion. However, if the installation does not permit the
burner to receive the proper supply of combustion air, complete combustion may
not occur. The result is incomplete combustion which produces carbon monoxide,
a poisonous gas that can cause death. Safe operation of indirect-fired gas burning
equipment requires a properly operating vent system that vents all flue products to
the outside atmosphere. FAILURE TO PROVIDE PROPER VENTING WILL RESULT
IN A HEALTH HAZARD WHICH COULD CAUSE SERIOUS PERSONAL INJURY OR
DEATH.
11.2 Heater Startup
(cont’d)
Form I-UEAS, Page 34