Panasonic WU-144MF1U9E Solenoid Valve Kit Installation - Page 3

How to use the fittings Suspension bolt (3/& or M10) (field supplied) Washer Nut (field supplied) (3/8" or M10) M4 screw (M4 x 15/32") Suspension hook • M4 screw (M4 x 15/3T : supplied ) • Never use a long screw other than the accessory screw. This may bore a hole through the tube surface, causing refrigerant leakage. Install the hanging hook with supplied 4 screws (M4 X 15/3T) taking care of the positioning. A CAUTION Wrong positioning will become unfitted center of gravity position, causing injuries or product damage. 4. Wiring, Tubing, and Heat Insulation 1. Refrigerant tubing Cool with damp cloth or other means when brazing the joint with a torch. Otherwise, the solenoid valve will be damaged. Gas tube //1 Liquid tube Discharge tube a Liquid tube Note Suction tube • When brazing, be sure to perform nitrogen replacement inside the tube so that oxidation coating does not form inside the tube. Then stop performing when nitrogen replacement is completed. The solenoid valve, however, will be damaged if nitrogen is applied during while brazing. • Heat sensitive components, protect from flame and heat conduction. • Comply with all Local Code Requirements. • Clean base metals throughly. • Use proper ventilation to carry fumes away from the work area. • Use a high quality silver based solder of at least 15% silver. • Heat the base materials broadly and uniformly. • Take precautions not to overheat the device which could damage sensitive internal components. • Insure compliance with all local codes! 2. Heat Insulation • Be sure to insulate the tubing after finishing leakage inspection. • Wrap insulators (field supplied) having a thickness of 25/64" or more with the heat resistance of 248°F or more around the discharge tubes and gas tubes, and 176°F or more around the suction tubes and liquid tubes. • Wrap around the each tube not to make gaps between the thermal insulation. • Failure to conduct shielding gaps and thermal insulation will cause water leakage. 3