Manual

OptionalEquipment-- A functionalcheckout
should be performed in accordance with
the checkout procedures supplied with the
equipment.
Adjustment of Refrigerant Charge:
CAUTION'.
Split system heat pump equipment
contains liquid and gaseous refrigerant
under pressure. Adjustment of
refrigerant charge should only be
attempted by qualified, trained
personnel thoroughly familiar with the
equipment. Under no circumstances
should the homeowner attempt to
install and/or service this equipment.
Failure to comply with this warning
could result in equipment damage,
personal injury, or death.
NOTE: The following Refrigerant Charging
Charts are applicable to listed assemblies of
equipment and at listed airflows for the indoor
coil. Assemblies of indoor coils and outdoor units
not listed are not recommended and deviations
from rated airflows or non-listed equipment
combinations may require modifications to the
expansion device(s) and refrigerant charging
procedures for proper and efficient system
operation.
Refrigerant Charging Chart -- Refer to
Refrigerant Charging Charts for correct system
charging, and to Orifice Usage Chart for correct
restrictor sizes.
NOTE: Linesets over 15 feet in length may
require additional refrigerant charge. NORDYNE
recommends 0.6 oz. of refrigerant per foot for
any lineset over 15 feet.
13 SEER Split System Heat Pump Orifice
Usage with ZRK3 Compressor
Model Restrictor Bore Size (inches)
Number indoor Outdoor
1.5 ton 0.053 0.040
2.0 ton 0.061 0.047
2.5 ton 0.069 0.049
3.0 ton 0.078 0.057
3.5 ton 0.083 0.059
4.0 ton 0.090 0.065
5.0 ton 0.101 0.067
System Charge
R-22 (oz.)
101
96
139
155
248
246
268
13 SEER Split System Heat Pump Orifice
Usage with CRK7 Compressor
Model
Number
System Charge
R-22 (oz.)
Restrictor Bore
Size (inches)
Indoor Outdoor
0.061 0.049
0.068 0.049
2.0 ton 120
2.5 ton 144
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