Test Run - Mitsubishi Electric CITY MULTI PKFY-WL NLMU-E Series Installation Manual

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 one 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.
Fig. 7-1
Warning:
Do not use the air conditioner if the insulation resistance is less than 1.0 MΩ.
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.
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.
A
7.2.2. The air vent valve of indoor unit (Fig. 7-1)
(1) Remove the air purge valve cover.
(2) Twist the knob on the air purge valve several times to release the air.
* Hold "A" with your fingers and twist it 3 – 4 times.
A Air purge valve
B Air purge valve cover (Tightening torgue: 1.3 ± 0.3 N·m, 1.0 ± 0.2 ft·lbs)
C Screw
B
C
en
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