Gree LSQWF130M/N-M, Service Manual

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AIR COOLED SCROLL CHILLER INSTALLATION
24
8 ANTIFREEZE
The units can operate with a leaving chilled fluid temperature from of 42
℉
to 60
℉
(5
℃～
16
℃
).A
glycol solution is required when leaving chilled fluid temperature is below 4.5
℃
. The use of
glycol will reduce the performance of the unit depending on concentration.
% by Weight 10 20 30 40 50
Freezing Point
℃（℉）
-3.3(26) -7.8(18) -13.9(7) -21.7(-7) -33.3(-29)
Ambient Temperature ℃（℉） 8.3(47) -1.7(29) -6.7(20) -16.7(2) -26.7(-16)
Cooling Capacity Correction
Factor
0.998 0.993 0.987 0.980 0.973
Water Flow Correction Factor 1.036 1.060 1.092 1.132 1.182
Pressure Drop Correction Factor 1.07 1.10 1.18 1.24 1.30
9 ELECTRIC WIRING WORK
9.1 Wiring Principle
1 ） General
‹ All leading wires, joints of them, equipments and wirings at field must accord with
various applicable regulations and requirements.
‹ All wiring work at field must be performed by the certificated personnel.
‹ Wiring work must be performed after cutting off power supply.
‹ The installing personnel shall be responsible for any damage resulted from incorrect
connection of external wirings.
‹ Warning---copper leading wire must be used.
2
）
Connect power cord into electric box of unit
‹
Circuit breaker must be installed in the external electric cabinet of unit to cut off power
of the electric box in the unit.
‹ The power cord should be laid out through the trunking, spool or cable trench.
‹ Rubber or plastic must be used for protection of power cord connected into electric box
in the unit to avoid scratch by sheet metal edge.
‹ The power cord close to electric cabinet of unit must be fixed reliably to protect power
terminal of electric box.