Reznor Q6SP Users Manual - Manual (Page 3)

3
Heating Operation (2 or 3 Stage)
2 individual refrigerant systems + Electric Heat (if installed)
1. Set the thermostat system mode to Heat and the
thermostat fan mode to AUTO (See Figure 1).
2. Raise the thermostat temperature switch above
room temperature and observe that the outdoor fans,
compressor(s), and indoor blower all cycle on and off.
NOTES:
• This unit is equipped with a 5 minute anti-short cycle
timer (ASCT) built into the defrost control board for
Stage 1 Heat or Cool. If the thermostat temperature
level is re-adjusted, or if the system mode is changed,
the compressor may not start immediately. Stage 2
Heat/Cool has no ASCT protection and can operate
immediately upon a call from the thermostat.
• If electric heat has been installed, the Stage 2
compressor will cycle off while Stage 3 heater
elements cycle on.
Emergency Heat
Most heat pump thermostats will include a system mode
called EM.HT. or AUX.HT, etc. This is a back-up heating
mode that should only be used only if a problem is
suspected. With the system switch set to Emer. Ht., etc.,
the compressor(s) and outdoor fans will be locked off
and supplemental heat (electric resistance heating) will
be used as a source of heat. Sustained use of electric
resistance heat in place of the heat pump will result in an
increase in electric utility costs.
Defrost Mode
During cold weather heating operation, the outdoor unit
will develop a coating of ice and frost on the outdoor heat
transfer coil. This is normal and the unit will defrost itself
automatically. During the defrost cycle, the outdoor fans
will stop while the compressor(s) continue to operate and
heat the outdoor coil, causing the ice and frost to melt.
During defrost, some steam may rise from the outdoor
unit as the warm coil causes the melted frost to evaporate.
Operating the Indoor Blower Continuously
Continuous indoor blower operation is typically used to
circulate the indoor air to equalize a temperature imbalance
due to solar loads, occupancy loads, or mechanical
equipment operation.
Set the thermostat fan mode to ON (or CONT on
some thermostat models). The indoor blower will start
immediately, and run continually until the fan switch is
reset to AUTO.
NOTE: The continuous indoor blower
operation can be obtained with the thermostat system
switch set in any position, including OFF.
System Shutdown
Set the thermostat system mode to OFF and the thermostat
fan mode to AUTO. See Figure 1. NOTE: The system will
not operate, regardless of the thermostat temperature
selector’s setting.
UNIT MAINTENANCE
WARNING:
Verify all electrical power to the unit is shut off
before performing the following recommended
maintenance.
Proper maintenance is most important to achieve the best
performance from the appliance and should be performed
by a qualifi ed service technician at least once a year.
Follow the maintenance schedule and the instructions
below for years of safe, trouble free operation.
• Do not place combustible materials on or against the
cabinet. Do not store gasoline or any other fl ammable
vapors and liquids in the vicinity of the unit.
• Annually inspect the physical support of the unit to
ensure that it is physically sound without sagging,
cracks, gaps, etc., around the base so as to provide a
seal between the support and the base.
• Annually inspect the return-air connection to ensure
that it is physically sound and is still sealed to the
casing of the unit. Also inspect the unit, ductwork, and
vent system for signs of physical deterioration.
• Always replace the doors on the unit after servicing.
Do not operate the unit without all doors and covers
in place. Avoid operating the unit when windows and
doors are open.
Regular Cleaning
WARNING:
DO NOT touch any of the internal electrical
components while cleaning the unit.
• Remove any debris from the outdoor coil Being careful
not to damage the aluminum fi ns.
• Inspect the condensate drain at the beginning of each
cooling season. Remove any debris.
• Clean the blower compartment regularly during the
heating and cooling seasons to remove any dust that
may have accumulated in the compartment or on
Figure 1. Digital Thermostat
Fan
Mode
Temperature
Selector
System
Mode