Gree HLR35SM/NaA-M, Service Manual

Page: 31 / 44

MODULAR MINI CHILLER INSTALLATION
31
2 WATER PIPING WORK
2.1 Installation Procedure
For all guidelines, instructions and specifications regarding refrigerant pipework between the
indoor unit and the outdoor unit. Please refer to the outdoor unit installation manual.
The units are equipped with a water inlet and water outlet for connection to a water circuit must
be provided by a licensed technician and must comply with all relevant national regulations.
2.2 Matters of Attention
Air vents must be provided at all high points of the system. The vents should be located at
points which are easily accessible for servicing. An automatic air purge should be used. Check
the valve is not tightened too much so that automatic release of air in the water circuit remains
possible.
2.3 Antifreeze
% by Weight
0 12 22 30 36 41
Freezing Point
℃
（
℉
）
0(32) -5(23) -10(14) -15(5) -20(-4) -30(-22)
Ambient Temperature
℃
（
℉
）
8.3(47) 3.3(38) -1.7(29) -6.7(20) -11.7(11) -16.7(2)
Cooling Capacity
Correction Factor
1.0 0.985 0.980 0.974 0.970 0.965
Water Flow Correction
Factor
1.0 1.02 1.04 1.075 1.11 1.14
Pressure Drop Correction
Factor
1.0 1.07 1.11 1.18 1.22 1.24
3 ELECTRIC WIRING WORK
3.1 Wiring Principle
POWER SUPPLY — The electrical characteristics of the available power supply must agree
with the unit nameplate rating. Supply voltage must be within the limits shown. See 3.3 for
electrical and configuration data. FIELD POWER CONNECTIONS — All power wiring must
comply with applicable local and national codes. Install field-supplied, branch circuit fused
disconnect(s) of a type that can be locked off or open. Disconnect(s) must be located within
sight and readily accessible.