Commissioning And Maintenance; Check Before Startup; Requirements On Water Quality And Cleaning - Gree A Series Installation, Start-Up And Maintenance Manual

8

Commissioning and Maintenance

The unit shall be maintained periodically by the skilled servicemen from Gree or a designed
person under our professional guide to guarantee the unit operates reliably in a long term.
8.1

Check before Startup

Please finish the following steps before staring the system.
(1)Before energization, be sure the insulation resistance between the wiring terminal and
ground complies with the local codes and regulations and check if the motor meets
the insulation requirement with a resistance meter.
(2)Check if all connenctions are in good condition and clean.
(3)Close the main power switch.
(4)Check if the voltage between terminals keeps balance within deviation of 2%.
(5)Be sure the power cord is capable of carrying the rated current on the nameplate.
(6)Be sure all valves of water and refrigerant pipeline are placed properly.
(7)Reset all hand reset control elements.
Be sure all sensor are placed installed properly.
8.2

Requirements on Water Quality and Cleaning

Be sure to open the water pump after the water system has been flushed times and the
water quality has met the requirements and meanwhile be sure the water flow rate and
pressure are within the allowable range.
The industrial water generates little scale when used as the refrigeration medium while the
well or river water will generate much more scale and sands which would reduce the flow rate
of the evaporate and cause freezing. Therefore, the well or river water must be firstly treated
with the water softening equipment and analyze the PH, heat conductivity, Cl ion, and S ion
before use.
PH（25℃）
Electrical conductivity
（25℃）
Basic
items
SO
Acid consumption
（PH4.8）
Total hardness
A Series Inverter Modular Air-cooled Chiller (Heat Pump)
Table 8.2.1
Water Quality Requirement
Items
mg（Cl
Cl -
mg（SO
4 2-
mg(CaCO
mg(CaCO
Water Quality
Cold/hot water
Circulating
water
6.8-8.0 6.8-8.0
μs/cm
<400
- ）/L
4 2- ）/L
)/L
3
)/L
3
23
Makeu-
p water
6.8-8.0
<300
<50 <50
<50 <50
<50 <50
<70 <70
Trend
Corro- Sc-
sion ale
0
0 0
0
0
0
0