-
296
-
'12 • PAC-T-173
1.11.3 Operation control function by the indoor controller
(
Ⅰ
) FDT, FDTC, FDEN, FDU, FDUM, FDF series
(1)
Auto operation
(a) If “Auto” mode is selected by the remote controller, the heating and the cooling are automatically switched according to the
difference between outdoor air temperature and setting temperature and the difference between setting temperature and return
air temperature. (When the switching of cooling mode
¢
heating mode takes place within 3 minutes, the compressor does
not operate for 3 minutes by the control of 3-minute timer.) This will facilitate the cooling/heating switching operation in
intermediate seasons and the adaptation to unmanned operation at stores, etc (ATM corner of bank).
Notes (1) Temperature range of switching cooling/heating mode can be changed by RC-EX1A from ±1.0
〜
±4.0.
(2) Room temperature control during auto cooling/auto heating is performed
according to the room temperature setting temperature. (DIFF: ±1 deg)
(3) If the indoor heat exchanger temperature rises to 59°C or higher during
heating operation, it is switched automatically to cooling operation. In
addition, for 1 hour after this switching, the heating operation is not
performed, regardless of the temperature shown at right.
Room temperature setting temperature
+3
-3
Cooling operation
Heating operation
Room temperature (detected with Th
I
-A) [deg]
59
56
Heating operation stopped (cooling)
Heating OK
Indoor heat exchanger temperature (°C)
(b) In cases of VF series only, the following automatic controls are performed other than (a) above.
①
Cooling or heating operation mode is judged according to the conditions of the "Judgment based on Setting tempe
Cooling select temperature and Indoor return air temperature" and the "Judgment based on Outdoor temperature".
・
In "Setting temperature - Cooling select temperature < Indoor return air temperature" and "Outdoor temperature/Cooling < Outdoor
return air temperature"
⇒
Operation mode: Cooling
・
"Setting tempe Heating select temperature > Indoor return air temperature" and "Outdoor temperature/Heating >
Outdoor air temperature"
⇒
Operation mode: Heating
・
The outdoor air temperature of the above judgment conditions is sampled at every 10 minutes.
・
In the range where the above cooling and heating zones are overlapped
⇒
Forced thermostat OFF
Indoor return air temperature (
é
)
Outdoor
air
temperature
(
é
)
24
26
12
14
16
18
28
30
20
22
12
26
24
22
20
18
16
14
30
28
Heating
Cooling
Forced thermostat OFF
Forced thermostat
OFF
Forced
thermostat OFF
Outdoor temperature/Heating
Outdoor temperature/Cooling
Cooling select temperature
Heating select temperature
Setting temperature
Summary of Contents for FDC Series
Page 95: ... 94 12 PAC T 173 Models FDT100VF 125VF 140VF H H H H H C B A F G D G PJF000Z285 ...
Page 98: ... 97 12 PAC T 173 Models FDEN60VF 71VF C 2 C 1 A B A B D C 1 C 2 C 1 C 2 E G F B PFA003Z817 ...
Page 113: ... 112 12 PAC T 173 b Wireless remote controller RCN E1R 60 17 150 Unit mm ...
Page 278: ... 277 12 PAC T 173 ー K ...
Page 346: ... 345 12 PAC T 173 Power PCB 1BSU OVNCFS 4GRNCEG VJG 2 ...
Page 518: ... 517 12 PAC T 173 3 5 SUPER LINK E BOARD SC ADNA E F SL2NA E and SL3N AE BE to control ...
Page 519: ... 518 12 PAC T 173 ...
