CSCMA-APH-6-SM1907A
R410A All DC Inverter Mini VRF
61 Installation
4.8 Leak detection
Use soap water or leak detector to check every joint whether leaks or not.
Note: A is low pressure side stop valve.
B is high pressure side stop valve.
C and D are connecting pipes interface of indoor and outdoor units.
4.9 Heat Insulation
Do the heat insulation to the pipes of air side and liquid side separately. The temperature of the pipes of air
side and liquid side when cooling, for avoiding condensation please do the heat insulation fully.
The air side pipe should use closed cell foamed insulation material, which the fire-retardant is B1 grade
and the heat resistance over 120°C.
When the external diameter
of copper pipe≤Φ12.7mm, the thickness of the insulating layer at least more
than 5ft.(15mm)
; When the external diameter of copper pipe≥ΦΦ
5/8(15.9mm), the thickness of the
insulating layer at least more than 6.56ft.( 20mm).
Please use attached heat-insulating materials to do the heat insulation without clearance for the
connecting parts of the indoor unit pipes.
5. Electric Wiring Installations
5.1 Highlights of electrical installation
1) Please separately design the special power of indoor units and outdoor units.
2) The power adopts special circuit, and installs creepage protector and manual switch.
3) The indoor units’ power, creepage protector and manual switch connecting to the same outdoor unit must be
general. All indoor units must be the same circuit, and must simultaneously on or off; otherwise, system life will
seriously effect, and appear the situation not to solve.
4) The communication line between indoor units and outdoor units please use 3 core shielded wiring, while
don’t use the multi core wiring without shielded affect, for the interference is reduced each other
5) Purchased wiring, parts and materials should be in compliance with the local and national regulations.
6) All field wiring construction should be finished by qualified electrician.
7) Air conditioning equipment should be grounded according to the relevant local and national electrical
regulations.
8) Current leakage protection switch should be installed (select current leakage breaker in light of the 1.5-2
times of total loading rated current.)
9) When connecting wiring and wire holder, use cable clamp to fix and make sure no exposure.
10) Refrigerant piping system and wiring system of indoor and outdoor unit belongs to the different system.
11) Do not connect the power wire to the terminal of signal wire.
12) When power wire is parallel with signal wire, put wires to their own wire tube and remain proper gap (the
current capacity of power wire is: 10A below 300mm, 50A below 500mm).
13) Voltage discrepancy of power wire terminal (side of power transformer) and end voltage (side of unit)
should be less than 2%. If its length could not be shortened, thicken the power wire. Voltage discrepancy
between phases shall not pass 2% rated value and Current discrepancy between highest and lowest phase
should be less than 3% rated value.
Check point of outdoor unit
Check point of indoor unit
D
A
B
C
The unit body
Affiliated heat pump belt
Site pipe side
Cut from upward
