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MULTI V Space II Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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Space Unit
Indoor Unit
Opening
Partition
Zone includes partition
(but no door), or includes
openings ≥0.15% of floor
volume (openings can be
located both above and
below the door)
Space Unit
Indoor UnitIndoor Unit Indoor Unit Indoor Unit
Without Partition.
Figure 68: Examples of Zones.
With Partition / With Opening to
Adjoining Room.
Indoor Unit
Smallest Zone
in System
Indoor Unit Indoor Unit
With Partition / Without Opening to Adjoining Rooms.
To determine the volume of an occupied space, the designer must also determine which ones are connected, not connected, or ventilated
(refer to Standard 34-2007).
If the calculated RCL is above the allowable limit, there are two primary methods used to lower the RCL:
1. Increase the volume of the occupied space.
2. Decrease the size of the refrigerant charge.
Per Standard 34-2007, acceptable methods used to increase the volume of an occupied space include:
• Install transfer ducts between rooms.
• Undercut and overcut doors (partitions ≤0.15% of cubic volume of space within a zone).
• Add an opening without a door (partitions ≤0.15% of cubic volume of space within a zone).
• Include ventilation grilles in doors; include ventilation inlets / outlets (partitions ≤0.15% of cubic volume of space within a zone).
• Include the area above the ceiling as part of the return or supply air path (partitions ≤0.15% of cubic volume of space within a zone).
• Install a mechanical ventilator linked to a gas leak detector.
• Change the indoor unit type (wall mounted to ceiling cassette) / position.
Mechanical Ventilator Linked
to a Gas Leak Detector
Ventilation Inlet / Outlet
Indoor Unit
Figure 69: Examples of Acceptable Ventilation Methods.
CAUTIONS FOR REFRIGERANT LEAKS
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