Dometic SMX II Description And Installation Manual page 34

Fig. 11 Refrigerant Line Sizes
Fig. 12 Modulating Unit Refrigerant Circuit
L-0952
Unit or Line
Capacity
4,000 - 12,000
Notes:
- Maximum length of refrigerant line between condensing
unit and each cooling unit is 50 feet (15m).
- Only use seamless refrigeration grade copper tubing
- Insulate suction line with minimum 3/8" (10mm) thick
closed cell insulation.
- Make sure all suction fittings and manifold are insulated.
- Seal (glue and/or tape) all insulation seams.
- Distributors should be located so that the refrigerant
lines from the distributors to each cooling unit are
approximately equal in length.
Fig. 13 Refrigerant Distributors
34
Recommended
Line Sizes
(Btu/hr) Discharge Suction
1/4"
16,000 1/4"
24,000 3/8"
42,000 3/8"
3/8"
1/2"
3/4"
3/4"