Reznor UDBS Unit Installation Manual - Manual (Page 33)

Form I-UDB, P/N 202658 R14, Page 33
Gas Control
Knob
(shown
in the ON
position)
Gas
Flow
Gas
Flow
Top View
Side View
FIGURE 17 - Gas Valve
9.3 Check
installation after
startup:
 Vent System Testing Procedure
The steps below shall be followed with each heater or utility heater connected to the
venting system placed in operation while any other appliance(s) connected to the
venting system(s) is not in operation.
1. Seal unused openings(s) in the venting system.
2. Inspect the venting system for proper size and horizontal pitch as required in the
National Flue Gas Code, ANSI Z223.1/NFPA 54, or the Natural Gas and Propane
Installation Code, CSA B149.1, and the venting manual instructions. Verify that
there is no blockage or restriction, leakage, corrosion, and/or other deficiencies
that could cause an unsafe condition.
3. In so far as is practical, close all doors, windows, other open spaces within the
building, and all doors between the space in which the appliance(s) connected to
the venting system is located. Turn on clothes dryers and any exhaust fans (such
as range hoods and bathroom exhausts) so they operate at maximum speed. Do
not operate a summer exhaust fan. Close fireplace dampers.
4. Following the lighting instructions, place the utility heater being inspected in
operation. Adjust the thermostat so that the utility heater will operate continuously.
5. After it has been determined that each utility heater connected to the venting
system properly vents when tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers, and any other gas-burning appliance to their
previous condition of use.
6. If improper venting is observed during any of the above tests, the venting system
must be corrected.
 With the unit in operation, measure valve outlet gas pressure. If operated at high
altitude, adjust outlet gas pressure for altitude.
See information and instructions in Paragraph 6.1.
 Turn the unit off and on, pausing two minutes between each cycle. Observe for
smooth ignition.
4. On the top of the valve, 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
blower 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 to “OFF” or knob clockwise to “OFF” (Do not
force).
5) Close the access door.
Top View
ON/OFF Switch