Notes - NEC RIH-2667 User Manual

Installation instructions
How to Purge Air Tubes:
(1). Unscrew and remove caps from 2 and 3-way valves.
(2). Unscrew and remove cap from service valve.
(3). Connect vacuum pump flexible hose to the service valve.
(4). Start vacuum pump for 10-15 minutes until reaching a vacuum of 10 mm Hg absolutes.
(5). With vacuum pump still running close the low pressure knob on vacuum pump manifold. Then stop
vacuum pump.
(6). Open 2-way valve 1/4 turn then close it after 10 seconds. Check tightness of all joints using liquid
soap or an electronic leak detector.
(7). Turn 2 and 3-way valves stem to fully the valves. Disconnect vacuum pump flexible hose.
(8). Replace and tighten all valve caps.

Notes

Please read this manual before installing and using it.
Do not let air enter the refrigeration system or discharge refrigerant when moving the air conditioner.
When charging refrigerant into the system, make sure to charge in
composition of refrigerant (
the air conditioner.
According to the character of refrigerant (R410A), the pressure of the tube is very high, so be sure to
careful when you install and repair the appliance.
Testing run the air conditioner after finishing installation, and record details of operation.
Type of fuse used on indoor unit controller is 50T, with rating 2.5 A,T,250V.
The fuse for the whole unit is to be provided by the user according to the current at maximum power
Input or use other over-current protective device instead.
Only the air conditioner can be connected to the power line.
The power connection for the air conditioner has to be done at the main power distribution which has
to be of a low impedance.
In order to ensure the suitability of the equipment for connection, the user should consult with the
supply authority, if necessary, that the service current capacity at the interface point is sufficient
for the equipment.
Refer to the rating plate of the equipment for power consumption details.
If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or
similarly qualified person in order to avoid a hazard.
Please pay more attention to the details of 2-way and 3-way valve.
Service valve:7/16 inch for R410A model.
Diameter of hexagon(inward): 4mm for R410A model.
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R410A ) inside the system may change and thus affect performance of the
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liquid state . Otherwise, chemical