![9-8-3. Heat insulation](/images/new-backgrounds/34996/3499683x1.webp)
9-8-3. Heat insulation
1.Provide heat insulation on the refrigerant piping on both the liquid side and gas side separately, and ensure that all joints in the insulation are completely sealed (without gap).
2.Since the temperature of the piping on the gas side increases during heating operations, the heat
insulating material used must be able to withstand temperatures of more than 120°C.
3.Use the pipe insulation supplied in the accessory pack to insulate the piping connecting section on the indoor unit side.
9-8-4. Packed valve handling precautions
•Open the valve stem all the way out; do not try to open it beyond the stopper.
•Securely tighten the valve stem cap in torque as follows:
Gas side (12.7 mm (diam.)) | 50 to 62 N•m (5.0 to 6.2 kgf•m) |
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Liquid side (9.52 mm (diam.)) | 33 to 42 N•m (3.3 to 4.2 kgf•m) |
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Liquid side (6.35 mm (diam.)) | 14 to 18 N•m (1.4 to 1.8 kgf•m) |
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Service port | 14 to 18 N•m (1.4 to 1.8 kgf•m) |
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Hexagonal wrench is required.
Fig.
Cover
Do not put the spanner or torque wrench, etc. on the cover.
The valve may be broken.
Fig.
•On the contrary, use a single spanner to loosen or tighten the flare nut of the valve at liquid side.
Valve unit
Handle
Pull out the handle and using cutting pliers, etc. turn it counterclockwise by 90°. (Open fully)
Charge port
Flare nut
Fig.
Valve unit
<For RAV-SM800AT-E model>
•As shown in the figure, be sure to use a double spanner to loosen or tighten the flare nut of the valve at gas side. If using a single spanner, the nut cannot be tightened with necessary tightening torque.
SM800 type valve at gas side
Cover
Cap
Piping valve
Loosened
Tightened
Flare nut
Fig.
Push in handle.
Charge port
Flare nut
Fig.
Handle
Closed completely | Opened fully |
Fig.
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