Mitsubishi Electric CITY MULTI PLFY-WL-NEMU-E Serie Manual De Instalación página 19

7. Test run
7.1. Before test run
► After completing installation and the wiring and piping of the indoor and
outdoor units, check for refrigerant leakage, looseness in the power supply
or control wiring, wrong polarity, and no disconnection of 1 phase in the
supply.
► Use a 500-volt megohmmeter to check that the resistance between the power
supply terminals and ground is at least 1.0 MΩ.
► Do not carry out this test on the control wiring (low voltage circuit) terminals.
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ.
A
Fig. 7-1
E
D
C
B
Caution:
• Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can result
in severe damage to internal parts. Keep the power switch turned on during the
operational season.
• Do not touch the switches with wet fi ngers.
- Touching a switch with wet fi ngers can cause electric shock.
• Do not operate the air conditioner with the panels and guards removed.
- Rotating, hot, or high-voltage parts can cause injuries.
• Do not turn off the power immediately after stopping operation.
- Always wait at least fi ve minutes before turning off the power. Otherwise, water
leakage and trouble may occur.
• When water has been supplied to the water pipework, purge the system of
air. The details of air purging can be found separately in the water circuit
maintenance manual.
7.2. Air purging
7.2.1. The details of air purging
As for the details of air purging, please refer to the water circuit maintenance
manual included in the package of the HBC controller.
7.2.2. The air vent valve of indoor unit (Fig. 7-1)
1 Remove the air purge valve cover.
2 Turn the knob on the air purge valve to release the air.
A Air purge valve
B Air purge valve cover (Tightening torque: 1.3 ± 0.3 N·m, 1.0 ± 0.2 ft·lbs)
C Screw
D Outlet (To HBC)
E Inlet (From HBC)
en
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