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Air-to-water Heat Pump
10.5 Requirements on water quality
Paramete
pH(25°C)
Cloudy
Chloride
Fluoride
Iron
Sulphate
SiO
2
Hardness(count CaCO
Nitrate(count N)
Conductance(25°C)
Ammonia (count N)
Alkalinity(count CaCO
Sulfid
Oxygen consumption
Natrium
10.6 Electric wiring work
10.6.1 Wiring principle
General principles
(1) Wires, equipment and connectors supplied for use on the site must be in compliance with
provisions of regulations and engineering requirements.
(2) Only electricians holding qualification are allowed to perform wire connection on the site.
(3) Before connection work is started, the power supply must be shut off.
(4) Installer shall be responsible for any damage due to incorrect connection of the external circuit.
(5) Caution --- MUST use copper wires.
(6) Connection of power cable to the electric cabinet of the unit
(7) Power cables should be laid out through cabling trough, conduit tube or cable channel.
(8) Power cables to be connected into the electric cabinet must be protected with rubber or plastic
to prevent scratch by edge of metal plate.
(9) Power cables close to the electric cabinet of the unit must be fixed reliably to make the power
terminal in the cabinet free from an external force.
(10) Power cable must be grounded reliably.
10.6.2 Specification of power supply wire and leakage switch
Power cable specifications and Leakage switch types in the following list are recommended.
Model
GRS-Cm18PdRe/NhA-M 380-415V 3N~ 50Hz
NOTES:
Leakage Switch is necessary for additional installation. If circuit breakers with leakage protection
are in use, action response time must be less than 0.1 second, leakage circuit must be 30mA.
(1) The above selected power cable diameters are determined based on assumption of distance
)
3
)
3
Cannot be detected
Power Supply
Air Break Switch
V, Ph, Hz
Parametric value
6.8~8.0
< 1
< 50
< 1
< 0.3
< 50
<30
< 70
< 10
< 300
< 0.5
< 50
< 3
< 150
Minimum Section Area
of Earth Wire
A
mm
20
2.5
21
Unit
—
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
μs/cm
mg/L
mg/L
mg/L
mg/L
mg/L
Minimum Section Area of
Power Wire
mm
2
2.5
2
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