7
Figure 4. Panel Removal
DETAIL A
DETAIL B
Figure 5. Panel Installation
REFRIGERANT CHARGING
WARNING:
*SA1BF4M2SN Split System Air Conditioners
are shipped charged with R410A refrigerant
and ready for installation. If repairs make it
necessary for evacuation and charging, it should
only be attempted by qualified trained personnel
thoroughly familiar with this equipment. Under
no circumstances should the owner attempt to
install and/or service this equipment. Failure to
comply with this warning could result in property
damage, personal injury, or death.
After refrigerant line connections are completed, it is required
that you leak check and evacuate the indoor section and all
line connections (using proper methods) before finalizing the
full system refrigerant charge.
• *SA1BF4M2SN outdoor units with non-AHRI listed indoor
coils are not recommended. Deviations from rated airflows
or non-listed combinations may require modification to the
expansion device and refrigerant charging procedures for
proper and efficient system operation.
• The refrigerant charge can be checked and adjusted
through the service ports provided external to the outdoor
unit. Use only gage line sets which have a “Schrader”
depression device present to actuate the valve.
• A high-pressure switch is factory-installed and located in the
liquid line internal to the outdoor unit. The switch is designed
to protect the system when very high pressures occur
during abnormal conditions. Under normal conditions,
the switch is closed. If the liquid pressure rises above
575 psig, then the switch will open and de-energize the
outdoor unit. The switch will close again once the liquid
pressure decreases to 460 psig. Please note that the
switch interrupts the thermostat inputs to the unit. Thus,
when the switch opens and then closes, there may be a
5 minute short cycling delay before the outdoor unit will
energize.
• On select models a low-pressure switch is factory-installed
and located in the suction line internal to the outdoor unit.
The switch is designed to protect the compressor from
a loss of charge. Under normal conditions, the switch is
closed. If the suction pressure falls below 5 psig, then the
switch will open and de-energize the outdoor unit. The
switch will close again once the suction pressure increases
above 20 psig. Please note that the switch interrupts the
thermostat inputs to the unit. When the switch opens and
then closes, there will be a 5 minute short cycling delay
before the outdoor unit will energize.
