Midea MGBT-D25W/DN1, Руководство пользователя

Страница: 144 / 180

R410a tropical air-cooled scroll chiller unit 60Hz MCAC-ATSM-2014-09
144 Installation
4.4 Wiring steps
Step Content
1
Check the unit and ensure that it is connected with grounding wires correctly, to avoid leakage, and the
grounding devices should be mounted in strict accordance with the requirements of electrical engineering rules.
The grounding wires can prevent electric shock.
2 The control box of the main power switch must be mounted in a proper position.
3 Wiring connection holes of the main power should be provided with glue cushion.
4 The main power and neutral wires and grounding wires of power supply are led into the electric box of the unit.
5 The wires of the main power must pass the bonding clamp.
6 Wires should be connected firmly to the connection terminals L1, L2, L3 , N and PE.
7 Phase sequences must be consistent when the wires of the main power.
8
The main power should be located out of easy reach of non-professional maintenance personnel, to avoid
mal-operation and improve safety.
9
Connection of control wires of water flow switches: the wire leads (prepared by the user) of water flow switches
are connected to the connection terminals W1 and W2 of the main unit.
10
Connection of control wires of auxiliary electric heaters: the control wires of AC contactor of the auxiliary electric
heater must pass the connection terminals H1 and H2 of the main unit, as shown.
10
11
Connection of control wires of pump: the control wires of AC contactor of the pump must pass the connection
terminals P1 and P2 of the main unit, as shown.
12
The connection way of the wired controller connects with every signal wires from package units: signal wires P,
Q, E are connected in the same way of main wires connection method and accordingly connect to the terminals
P, Q, E in the wired controller.
H1
H2
Power supply (220-240V~60Hz)
Overcurrent relay
Control coil of AC contactor
P1
P2
Power supply (220-240V~60Hz)
Overcurrent relay
Control coil of AC contactor
Switch (For trial run of pump)