MCAC-VTSM-2011-09
Installation
Commissioning
113
8. Commissioning and Trial Running
8.1 Work before Commissioning
8.1.1. Inspection and confirmation before Commissioning
1. Check and confirm that refrigeration pipe line and communication wire with indoor and outdoor unit
have been connected to the same refrigeration system. Otherwise, operation troubles shall happen.
2. Power voltage is within ±10% of rated voltage.
3. Check and confirm that the power wire and control wire are correctly connected.
4. Check whether wire controller is properly connected.
5. Before powering on, confirm there is no short circuit to each line.
6. Check whether all units have passed nitrogen pressure-keeping test for 24 hours with R410A:
40kg/cm
2
.
7. Confirm whether the system to Commissioning has been carried out vacuum drying and packed with
refrigeration as required.
8.1.2. Preparation before Commissioning
1. Calculating the additional refrigerant quantity for each set of unit according to the actual length of
liquid pipe.
2. Keep required refrigerant ready.
3. Keep system plan, system piping diagram and control wiring diagram ready.
4. Record the setting address code on the system plan.
5. Turn on power switches outdoor unit in advance, and keep connected for above 12 hours so that
heater heating up refrigerant oil in compressor.
6. Turn on gas pipe stop valve, liquid pipe stop valve, oil balance valve and gas balance valve totally. If
the above valves do not be turned on totally, the unit should be damaged.
7. Check whether the power phase sequence of outdoor unit is correct.
8. All dial switches to indoor and outdoor unit have been set according to the Technical Requirement of
Product.
Note:
The setting of
outdoor unit’s dial switch should be conducted under power-off, otherwise the unit
shall not identify. The following table shows the address and power of outdoor master and slave unit:
ADDRESS dial switch
POWER dial switch
0
Master unit
0
8HP
1
Slave unit 1
1
10HP
2
Slave unit 2
2
12HP
3
Slave unit 3
3
14HP
≥4
Invalid address, system error
4
16HP
-
≥5
Invalid dial switch
8.2 Commissioning of Trial Run
8.2.1. Commissioning for trail run of single unit.
1. Each independent refrigeration system (i.e. each outdoor unit) should be conducted trail operation.
2. Detection details of trail run:
1) As for fan in unit, make sure the rotating route of its impeller is correct and impeller turns around
smoothly. No abnormal vibration and noise.
2) Check whether there is abnormal noise during operation of refrigerant system and compressor.
3) Check outdoor unit whether it can detect each indoor unit.
4) Check whether drainage is smooth and its lift pump can be in motion.
5) Check whether microcomputer controller can be in motion normally and whether any trouble appears.
6) Check whether operating current is within the allowed range.
