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MULTI V IV System Installation Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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REFRIGERANT PIPING DESIGN
Zone Control with Heat Recovery Systems
Pipe Sizing for Heat Recovery Systems
Some indoor units can be connected to one port of heat recovery unit.
• One heat recovery unit branch pipe can support a maximum of 54,000 Btu/h total indoor unit cooling capacity.
• PRHR041A heat recovery unit can support a maximum of 192,000 Btu/h total capacity and up to 32 connected indoor units (maximum
indoor units per heat recovery unit branch pipe is 8).
• Zone control groups cannot operate in “Auto changeover” or “Mode override” functions.
• In the zone control group, if some indoor units are operating in cooling or heating mode, the other indoor units cannot changeover to /
operate in the opposite mode.
HR unit HR unit
Brazed Cap
Same mode Auto changeover
Zone Control Group 1 Zone Control Group 2
(Max. 8 Indoor Units)(Max. 8 Indoor Units)
Same mode
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