MCAC-VTSM-2011-09
Installation
Unit Installation
73
attention not to destroy the waterproof of the roof.
1.3.9 Recharge refrigerant procedure
Note:
Please calculate the additional amount of refrigerant according to the formula that we supply to
you, and the calculation result must be correct
1.3.10 Main points of test running and Commissioning
Please check the following issues before turning on the power:
1.3.10.1 Vacuum dry: Make sure the vacuum degree accord with our requirement about 10
-5
.
1.3.10.2 Wiring: Includes the power wiring and communication wiring; Recheck the connection
according to our corresponding wire diagrams. Especially, please remember our communication wire is
polar; it means you must connect the communication wire correspondingly to the terminal block.
1.3.10.3 Additional charge of refrigerant: Recheck the calculation formula and recalculate the total
recharge volume according to our supplied formula.
1.3.10.4 Open the stop-valve of gas and liquid pipe with Allen key; Check leakage of stop-valve with
soap water. Please confirm whether the outdoor unit has been connected to the power for 12hr before
start test running.
Test running:
Turn on all of the indoor units with cooling mode and set the temperature in 17degree with
high fan speed first, after the system operated, test following operation parameters of the system,
including indoor units and outdoor units parameters.
1.4 Installation Preparation
1.4.1 Installation tools and instruments
All the necessary tools should be available, and their models and specifications should meet the
installation and technical requirements. The instruments and meters should be tested or verified, and
their scales and accuracy should meet the requirements. The common tools for installing refrigerant
machine are listed below.
No.
Name
Specification/Model
No.
Name
Specification/Model
1
Pipe cutter
15
Electronic scale
2
Steel saw
16
Stop
3
Pipe bender
Spring, mechanic
17
Thermometer
4
Pipe expander
Depend on the pipe
diameter specification
18
Meter rule
5
Flaring tool
Depend on the pipe
diameter specification
19
Screw driver
―-‖, ―+‖
6
Brazing welder
Depend on the nozzle
size
Adjustable
spanner
7
Scraper
21
Resistance tester
8
File/Rasp
22
Electro probe
9
Injection tube
23
Multimeter
10
Double-ended
pressure gauge
4.0MPa
24
Pressure reducing
valve
11
Pressure gauge
1.5MPa, 4.0MPa
25
Wire pliers
12
Vacuum gauge
-756mmHg
26
Clamping pliers
13
Vacuum pump
At least 4 liters/second
27
Hexagon ring
spanner
14
Horizontal rule
28
Torque wrench
In addition, tools such as electric welder, cutter, A-shape ladder, electric drill, folding machine, forming
machine, nitrogen cylinder are also generally used during the installation.
1.4.2
Audit of construction drawings
Calculate the added volume according to liquid pipe length
Recharge refrigerant
