5
REFRIGERANT CHARGING
WARNING:
*SA3BD4M 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 and expansion device
installation 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.
Note: additional charging instructions located near the end
• Refer to the Quick Reference Data sheet for additional
charging information for this unit with the approved Nortek
indoor units. For reference, these units are listed in the
AHRI Directory with all approved combinations of indoor
coils and units. Installing these outdoor units on systems
that combine it with an indoor coil or unit not listed there, is
not recommended. When approved combinations of indoor
and outdoor units are installed, they should be set up to
operate within the airflow and other operational parameters
prescribed in all of the units provided instructions and
technical specifications.
• Installation of this outdoor unit with other, non-listed
indoor unit combinations may require different airflows,
expansion devices, charge values and system setup from
the instructions provided here and with this unit. Nortek
does not recommend the use of this product in unlisted
combinations, and the system performance and efficiency
values of unlisted unit combinations may be different than
the listed product combinations.
• *SA3BD4M 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.
• An automatic high-pressure switch is factory-installed
installed in these units and is located on the discharge
line after the unit's compressor. This switch is designed to
protect the system when very high pressures occur during
abnormal conditions. Under normal conditions, the switch
is closed. If the system pressure rises to 650 psig, then
the switch will open and de-energize the contactor coil
in the outdoor unit. The switch will close again once the
liquid pressure decreases to 460 psig and allow the unit
to restart.
ELECTRICAL WIRING
WARNING:
To avoid risk of electrical shock, personal
injury, or death, disconnect all electrical power
to the unit before performing any maintenance
or service. The unit may have more than one
electrical supply.
Label all wires prior to disconnection when
servicing the unit. Wiring errors can cause
improper and dangerous operation.
• All electrical connections must be in compliance with
all applicable local codes and ordinances, and with
the current revision of the National Electric Code
(ANSI/NFPA 70).
• For Canadian installations the electrical connections and
grounding shall comply with the current Canadian Electrical
Code (CSA C22.1 and/or local codes).
Pre-Electrical Checklist
√
Verify that the voltage, frequency, and phase of the supply
source match the specifications on the unit rating plate.
√
Verify that the service provided by the utility is sufficient
to handle the additional load imposed by this equipment.
Refer to the unit wiring label for proper voltage wiring.
√
If replacing an existing unit, verify that the: current wiring,
unit disconnect and circuit breaker is properly sized and
rated for the new units requirements. Verify that information
with the MCA and MOP values on the unit nameplate.
√
Verify factory wiring is in accordance with the unit wiring
diagrams
). Inspect for loose
connections.
