Smms System Specifications To Connect Outside Air Unit - Toshiba MMD-AP0481HF2UL Service Manual

1-1. SMMS System Specifications to Connect Outside Air Unit

1-1-1. Combination conditions
• The Outside Air Unit is connectable to SMMS-i and SMMS-e.
• However this is not connectable to SHRM-i and SHRM-e.
• The total capacity of the indoor units and the Outside Air Units is restricted to 80% to 100% against the
capacity of the outdoor units. (This restriction should be strictly kept for correct control of the refrigerant.)
• Up to two Outside Air Units can be connected on one line of the multi system.
The allowable total capacity of the two Outside Air Units shall be 30% or less against the total capacity of the
indoor units (including the Outside Air Unit).
• The Outside Air Unit is usually used together with the indoor units on one line of the multi system.
The Outside Air Unit only cannot be connected.
• Keep the height difference between the Outside Air Units to 19.7" (0.5m) or less.
CORRECT
80 to 100% to capacity of the Outdoor Units
Connection which stretches over two
floors is unavailable
Height difference:
19.7" (0.5m) or more
CORRECT
INCORRECT
– 9 –
Up to two Outside Air Units
occupy 30% or less against
total capacity of indoor units
INCORRECT