Reznor R6GF Unit Installation Manual - Manual (Page 17)

17
Table 6 (page 19) lists the correct orifice size to use at
different altitudes.
After changing the orifices, it is required that you measure
the gas input rate by clocking the gas meter and using
the local gas heating value. See Verifying and Adjusting
the Firing Rate section on page 18.
START UP & ADJUSTMENTS
Pre-Start Check List
√
Verify the unit is level and allows proper condensate
drainage.
√
Verify all clearance requirements are met and there is
free airflow to and from the outdoor coil.
√
Verify that the duct work is sealed to prevent air leakage.
√
Verify that the line voltage power leads are securely
connected and the unit is properly grounded.
√
Verify that the low voltage wires are securely connected
to the correct leads on the low voltage terminal strip.
√
Verify that the gas line service pressure does not exceed
10.0 inches WC (0.36 psig), and is not less than 4.5
inches WC (0.16 psig) for natural gas. For LP gas the
line service pressure must not exceed 14 inches WC
(0.51 psig) and must not be less than 11.0 inches WC
(0.40 psig).
√
Verify that the flame roll-out control is closed. If
necessary, press the red button to reset the control. DO
NOT install a jumper wire across the control to defeat
its function. If the control reopens upon start-up, DO
NOT reset the control without identifying and correcting
the fault condition which caused the control to trip.
√
Verify that the gas line has been purged and all
connections are leak tight.
√
Verify that all exterior panels are replaced and securely
fastened.
√
Verify that the outdoor fan turns freely.
√
Verify that the power supply branch circuit overcurrent
protection is sized properly.
√
Verify that the thermostat is wired correctly. The
thermostat function switch should be set to OFF and
the thermostat fan switch should be set to AUTO.
Start-Up Procedure
WARNING:
If this unit is equipped with crankcase heaters,
allow 24 hrs for heating of the refrigerant
compressor crankcase prior to start up and
anytime the power has been removed for more
than 12 hrs. Failure to comply may result in
damage or cause premature failure of the
system.
• Check all electrical wiring for loose connections and
tighten as required.
• Check unit for return air filters and condensate trap.
• Close all electrical disconnects to energize the system.
Air Circulation
Leave the thermostat system mode on OFF and set the
fan mode to ON. Blower will run continuously. Check the
air delivery at the supply registers and adjust register
openings for balanced air distribution. Examine ductwork
for leaks or obstruction if insufficient air is detected. Set
the thermostat fan mode to AUTO. The blower will stop
running.
System Cooling
1. Set the thermostat’s system mode to COOL and the
fan mode to AUTO. Lower the thermostat temperature
setpoint one degree below room temperature and verify
the outdoor unit and blower energize on 1st stage cool.
2. Feel the air being circulated by the indoor blower and
verify that it is cooler than ambient temperature. Listen for
any unusual noises. If unusual sounds occur, determine
the source of the noise and correct as necessary.
3. Once determining the system is operating properly,
after 1-2 minutes lower the thermostat temperature set
point an additional 3-4 degrees until the cooling system
moves into 2nd stage or high cool operating mode. The
compressor and indoor blower will increase in speed.
4. Allow the cooling system to operate for several minutes
and then set the temperature selector above room
temperature. Verify the fan and compressor cycle off
with the thermostat. NOTE: The blower should also stop
in approximately 60 seconds, unless the fan switch is
set to the ON position.
System Heating
1. Set the thermostat to the lowest setting.
2. Follow the procedures given on the operating instruction
label, in this installation instructions or attached inside
the louvered control access panel.
3. Set the thermostat one degree above room temperature
and verify the sequence of operation. See Operating
Sequence section (page 19.)
4. Verify that the compressor and outdoor fan motor are
not energized.
5. Once determining the system is operating properly,
after 1-2 minutes raise the thermostat temperature
set point an additional 3-4 degrees until the heating
system moves into 2nd stage or high heat operating
mode. The gas valve will energize to high heat mode
while the induced draft motor and indoor blower motor
both increase in speed.
6. After the unit has run for approximately five minutes,
set the thermostat below room temperature. Verify the
shutdown sequence; steps 10 -12 in the Operating
Sequence section (page 20).
Verifying & Adjusting Temperature Rise
Verify the temperature rise through the unit is within the
range specified on the unit data label for both high and
low firing rates. Temperature rises outside the specified
range could result in premature heat exchanger failure.
1. Place thermometers in the return and supply air stream
as close to the unit as possible. The thermometer on the