Sanyo ECO G SGP-EW120M2G2W, Технические данные инструкция

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System Design
3. Refrigerant piping design
D-15
(8) Future system expansion
(1) Conditions for adding indoor units
1) Up to 24 indoor units can be connected to an outdoor unit. (Up to two W-Multi outdoor units can be installed
for up to 48 indoor units.)
2) Usable indoor unit capacity ranges are:
Minimum: 50% of the minimum capacity of the outdoor units
Maximum: 130% of the total capacity of the outdoor units
(2) Outdoor unit connection conditions (during initial installation, be sure to select piping sizes that will support the
total horsepower after expansion).
The following table shows the possible combination for future expansion based on the pipe (main pipe) size.
Outdoor unit planned for current installation 13 HP 16 HP 20 HP 25 HP
13 HP
－
16 HP
－ －
20 HP － － －
Outdoor unit considered for expansion
(up to two units, or 50 HP)
25 HP
－ － － －
1) Outdoor units other than those indicated above cannot be used for expansion. (Doing so may result in a
failure.)
2) During initial system installation, be sure to consider the requirements for indoor unit piping after expansion.
(3) Select piping sizes according to requirements after expansion. [Refer to section 2, “System Piping.”]
(4) If future system expansion is anticipated, install ball valves (sold separately) at the outdoor and indoor unit
sides of the branch pipe. (Figure 1)
1) To prevent oil from being drawn inside, slope piping opposite to flow direction.
2) Locate ball valves as close as possible to the main piping (within 40 cm).
3) If the diameter of the ball valve is smaller than the main piping, install a reducer at the valve.
4) Locate the equipment where it will be easy to operate and inspect in the future.
5) Ball valves for expansion should be installed with their service ports facing the future units they will serve.
Figure 1