Anti-Freezing; Electrical Connection - HTW MKH2 Manuel De L'utilisateur Et D'installation

2
2
1
1
Diamond-shaped holes
blocked with sponge
Figure 5-19 Removing the electric control box and
blocking the diamond-shaped holes

5) Anti-freezing

The water in the unit may freeze when the unit is left unused in winter.
Drain the water system when appropriate if it is not used over a long period. Or you can simply add some antifreeze in water.
Mixing water with glycol will affect the unit performance.
Please pay attention to the safety instructions attached to the glycol container.

5.5 Electrical Connection

Make sure that the power supply falls with 220-240V~1ph 50Hz/60Hz and is able to provide enough wattage for the
unit. The power supply system must comply with the current national safety regulations.
The electrical connection must be completed by qualified professionals and must comply with local laws and
regulations. The company is not responsible for personal or property damage resulting from any incorrect electrical
connections.
Provide dedicated and suitable leakage protection device for the unit, with a minimum distance of 3 mm among the
wiring contacts. The unit must be grounded reliably.
Make sure that the power cord has a large-enough cross section to withstand the maximum current required. Never
use a damaged cable.
Perform electrical connections according to the wiring nameplate (stick to the cover of the electronic box) of the unit.
Secure the cable using clamps in the electric control box to ensure the safety of the power supply cable and the
connection cable.
Do not pull, step on or squeeze the cable. Do not use nails or staples to secure the power cord.
You need to pass the cable through the knockout hole at the foundation.
For this stationary appliance it is required to have for disconnection of mains supply and all-pole switch with a
contact opening of at least 3mm in the fixed wiring.
The grounding wire in the electrical control box needs to be longer than the current-carrying wire.
For DC 4-Pipe series，the cooling water valve and heating water valve would open at the same time when the PCB
receive the fan speed control signal from 0-10V wired controller.Please don't turn on the chiller and heat pump
simultaneously，and we suggest to install another check valve to stop the water flow when it is necessary.
1
2
Heat
1
exchanger
2
1
Temperature Drain pan
sensor plug
Figure 5-18
1
NOTE
NOTE
14
1
1
Electric
control
box
1