Reznor R6GN Unit Installation Manual - Manual (Page 16)

16
StaRtuP & aDJuStMENtS
Pre-Start check list
√ Verify unit is properly supported.
√ Verify unit is level for proper condensate drainage.
√ Verify all clearance requirements are met. Airflow to
and from the outdoor coil must be unrestricted.
√ Verify the ductwork is adequately sealed to prevent air
leakage. Insulate if necessary.
√ Verify the line voltage power leads are securely
connected and the unit is properly grounded.
√ Verify low voltage wires are securely connected to the
correct leads in the control box.
√ Verify gas line pressure. For natural gas, the line pressure
must not exceed 10.0 inches WC (0.36 psig), or be less
than 5.5 inches WC (0.20 psig). For LP gas, the line
pressure must not exceed 14 inches WC (0.51 psig)
and must not be less than 11.0 inches WC (0.40 psig).
√ Verify the flame roll-out control is closed.
IMPoRtaNt NotE! This safety device is a manually
reset switch. 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 the gas line has been purged and all connections
are adequately sealed. To check for gas leakage, see
Leak Check section on page 12.
√ Verify the indoor blower is properly set for the installation.
√ Verify the outdoor fan turns freely.
√ Verify the power supply branch circuit overcurrent
protection is properly sized.
√ Verify all exterior panels have been reinstalled and
securely fastened.
√ Verify the thermostat is wired correctly and preset for
initial operation. Set the thermostat system switch to
OFF and the fan switch to AUTO.
Startup Procedures
WaRNING:
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.
To change the blower speed:
1. Disconnect all electrical power to the unit.
2. Open the motor access panel.
3. Loosen the 4 motor mounting nuts. Turn the belt
tensioning nut until belt can be removed from the sheave
or pulley.
4. Loosen front set screw on the motor sheave.
NotE: Turning the set screw clockwise (close) increases
the blower speed, or counterclockwise (open) decreases
blower speed.
5. Replace belt on pulleys and position motor mounting
plate to correct position for proper belt tension. Note:
Make sure the pulley, belt, and motor sheave are properly
aligned.
6. Tighten the four motor mounting nuts. Verify the drive
belt is secure and tensioned properly.
Heat anticipator
Verify if the thermostat being used for the installation has a
heat anticipator setting. This function allows the thermostat
to anticipate the space heating rate and time the burner
to shutoff accordingly. Always refer to the thermostat
manufacturers instructions for the correct settings.