Toshiba VN-M150HE Service Manual page 20

NO. Item
Ventilation 2. Air to Air Heat Exchanger system linked with air conditioners
mode control
1) Automatic ventilation mode control in the air-conditioning linkage
(continued)
2) The Bypass condition at the time of automatic ventilation mode control in the Air
2
Specification outline
• Determine the mode from the operation mode of the air conditioner.
[Cooling zone]: The air conditioner operation mode is Automatic cooling,
Cooling, or Drying mode.
[Heating zone]: The air conditioner operation mode is Automatic heating or
Heating mode.
In Fan mode, the zone is determined by the automatic ventilation mode control
in the Air to Air Heat Exchanger system.
• The setting of the automatic ventilation control in the Air to Air Heat Exchanger
system linked with air conditioners can be changed with CODE No. (DN) [EC]
of the DN setting.
0000: Valid only when the air conditioner is running (factory default). When the
air conditioner is stopped, the zone is determined by the automatic
ventilation mode control of the Air to Air Heat Exchanger system.
0001: Valid even if the air conditioner is stopped. If the air conditioner is
stopped, the zone is determined by the operation mode and set
temperature before stop.
0002: Invalid. The zone is determined by the automatic ventilation mode
control in the Air to Air Heat Exchanger system.
to Air Heat Exchanger system linked with air conditioners (excluding Fan mode)
[Cooling zone]
RA OA + 3°C and RA set temperature + 2°C and OA
and RA 20°C
[Heating zone]
OA RA + 3°C and RA set temperature - 2°C and OA
and RA 27°C
• Condition for returning to Heat Exchange (determined by the set temperature
before stop, even when the air conditioner is stopped)
(For details, see the section "Cold Mode Control.")
[Cooling zone] RA set temperature - 2°C or RA
[Heating zone] RA set temperature + 2°C or RA
• If the system is in an undefined zone when operation starts, the system is
operated in Heat exchange mode. If the state moves to this zone during
operation, the previous state is retained.
Automatic ventilation mode control in the Air to Air Heat
Exchanger system linked with air conditioners
32
28
24
20
Heat Exchange
16
12
8
12
4 8
18°C
29°C
Cooling zone
Minimum set
Undefined
temperature
zone
16 20 24
RA: Return Air (°C)
19
Remarks
RA/10°C + 14.5°C
RA/10°C + 14.5°C
Bypass
28 32