Emergency Operation (Cooling Operation Under Header Outdoor Unit Backup Scenario) - Toshiba MMY-MAP0724HT6UL Service Manual

5-4. Emergency operation (cooling operation under
header outdoor unit backup scenario)
Leakage from PMV:
Liquid-side service valve
= Full closure
Header unit (MMY-MAP0964HT6UL)
Pressure sensor
(high pressure)
Liquid tank
Balance pipe packed
Gas-side service valve
valve = Full opening
= Full closure
Note: The "header unit" is the outdoor unit to which the indoor-outdoor communication line is connected.
All other outdoor units are called "follower units".
Failure
4-Way valve
Pressure sensor
(low pressure)
Accumulator
Balance pipe
Liquid pipe
Gas pipe
Gas pipe
Liquid pipe
High-pressure gas or condensate liquid refrigerant
Evaporative gas refrigerant (low-pressure gas)
Normal refrigerant line
Refrigerant recovery line
Set Up as Temporary Header
Unit during Emergency
Operation
Follower unit (MMY-MAP0964HT6UL)
Pressure sensor
(high pressure)
Liquid tank
Indoor unit
(The diagram shows a 192 type as an example.)
36
4-Way valve
Pressure sensor
(low pressure)
Accumulator