Toshiba MMD-UP0721HFP-UL Service Manual page 12

<Combination other than Super Modular Multi System u series
(SMMS-u)>
Allowable connection capacity
1. The fresh air intake unit is usually used together with the indoor units on one line of the multi system.
The fresh air intake unit only cannot be connected.
2. The total capacity of the indoor units and the fresh air intake 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.)
3. Up to two fresh air intake units can be connected on one line of the multi system.
The allowable total capacity of the fresh air intake units shall be 30% or less against the total capacity
of the indoor units (including the fresh air intake units).
When two Fresh air intake units or more are installed into one refrigerant line, all the units to be installed
•
must be the same model (MMD-UP***HFP*).
80% to 100% to capacity of the outdoor units
Keep the height difference between the fresh air intake units to 0.5 m or less.
•
Correct
• All fresh air intake unit connetion
* In SMMS-e series, the fresh air intake units only can be connected.
For details, refer to the next page.
Correct
Up to two fresh air intake units
occupy 30% or less
Height difference:
0.5 m or less
Incorrect
- 12 -
Height difference:
0.5 m or less
Incorrect
Height difference:
0.5 m or more