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INSTALLATION INSTRUCTIONS
Additional Refrigerant Charging
• Charge the additional refrigerant as liquid using a digital refrigerant scale and manifold gauges.
• Charge the system in trail mode. Compressor failure can occur if the system runs for a prolonged period of time while
undercharged.
• Charging must be complete within a 30 minute period.
• The unit is only partially charged from the factory and will need additional refrigerant. Refer to the report generated by
the system design software. W1: Refrigerant charging volume to outdoor unit at factory.
• W2: Refrigerant charging volume to liquid pipe base on different piping length calculation. W2=actual length of liquid
pipe×additional amount per ft liquid pipe=
• (L1×3.76)+(L2×2.69)+(L3×1.83)+(L4×1.18)+(L5×0.58)+(L6×0.24) L1:Total length of 7/8 (22.22) liquid pipe; L2:Total length
of 3/4(19.05) liquid pipe; L3:Total length of 5/8(15.88) liquid pipe; L4:Total length of 1/2(12.7) liquid pipe; L5:Total length
of 3/8(9.52) liquid pipe; L6:Total length of 1/4(6.35) liquid pipe
• Total refrigerant volume charging on site during installation=W2
• W: Total refrigerant volume charging on site for maintenance.
W1:
Refrigerant
Model
charging volume
to outdoor unit
at factory
072
511.5 oz
096
754.8 oz
120
754.8 oz
144
783.1 oz
NOTE:
• Do not use manifold gages and hoses that were used on equipment with oil other than PVE. Cross contamination can
occur.
• Refrigerant R410A is identified by a pink tank color or label.
• Charging cylinders cannot be used because R410A refrigerant will fractionate.
• Always charge R410A refrigerant using liquid.
• Write the final charge weight on the unit near the name plate for future reference.
This product contains fluorinated greenhouse gasses and its functioning relies upon such gasses.
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REFRIGERANT RECORD FORM
W2:
Refrigerant charging volume to liquid pipe base on different piping
length calculation
Liquid pipe
Additional refrigerant amount Oz/ft
Diameter in(mm)
1/4(6.35)
0.24 Oz/ft×__ft=__ Oz
3/8(9.52)
0.58 Oz /ft×__ft=__ Oz
1/2(12.7)
1.18 Oz /ft×__ft=__ Oz
5/8(15.88)
1.83 Oz /ft×__ft=__ Oz
3/4(19.05)
2.69 Oz /ft×__ft=__ Oz
7/8(22.22)
3.76 Oz /ft×__ft=__ Oz
Total refrigerant
W: Total refrigerant volume
Volume charging
charging on Liquid pipe site
on site during
for maintenance
installation
W2=___ Oz
W1+W2=___ Oz
31-5000573 Rev. 2
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