Haier MVHR072ME2CA1 Manuel D'installation page 26

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.
26
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