Outline of Control (Outdoor Unit) < Symbols using in this manual > Si33-105
56 Function R407C PLUS Series Heat Recovery System
3.3 Startup Control
3.3.1 Startup Mode
Purpose
!
Selects startup method depending on operating mode during compressor stop and startup to
changeover BS unit solenoid valve and three 4-way valves.
Contents
!
Decides the startup mode depending on the operating status during compressor stop.
!
Mode judgement
•
In case of all the temperature adjusting modes of indoor unit in thermostat ON are cooling:
Cooling mode.
•
In case of all the temperature adjusting modes of indoor unit in thermostat ON are heating:
Heating mode.
•
In case of the temperature adjusting modes of indoor unit in thermostat ON include cooling
and heating: Simultaneous cooling/heating operation mode.
"
As for mode judgement, modes of the unit in thermostat OFF, stop or fan are ignored. (The
judgement should be based on only those of thermostat ON unit.)
!
The condition when power supply turning ON is designated as Condition 1.
Cooling mode
Pressure equalizing start
Pressure equalizing start
Pressure equalizing start
Cooling start
4-way valve
changeover start
4-way valve
changeover start
4-way valve
changeover start
Heating mode
Simultaneous cooling/heating
operation mode
When
stops
operation
Stop
↓
Startup
Condition 1
Condition 4 Condition 5 Condition 6
Condition 2 Condition 3
(V2563)
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