ATC Technology C42 User manual

120 mm
72 mm
20 mm
82 mm
60 mm
C42 LCD DIGITAL THERMOSTAT
FEATURES:
Thin & single body design.
Micro computer detects and control temperature.
LCD screen with optional back-light function.
Easy to operate and maintenance.
DIMENSIONS：
MODE
SLEEP
OFF
C
ROOM
MODE
SLEEP
OFF
C
ROOM
Base
Cooling← o →Heating
Select Switch(Cooling/Heating type only)
Horizontal
Vertical
OPERATING INSTRUCTIONS:
Power on & Fan speed
There is no any action when the main switch was set for ' OFF ' position.
When the main switch was set for（low ／middle ／high ）position, the
air-conditioning will be start operating in the corresponding fan speed.
Press key to reduce 1℃.
Press key to increase 1℃.
When the select switch was set on cooling mode , Press ' MODE ' key will change
operating mode as following order :
When the select switch was set on heating mode , Press ' MODE ' key will change
operating mode as following order :
Cooling >Dehumidity >Fan only > Cooling in circulation
Heating > Fan only > Heating
It's necessary to press ' MODE ' key in order to correct the new mode when change
select switch each time.
Power OFF
Temp. adjust
Mode select
Sleep mode
Lock & Unlock
Press the ' SLEEP ' button while cooling mode will enable the sleeping mode ,
The setting temperature will rise 1°C after half hour and rise 1°C again after one hour.
Keep press the ' MODE ' button until the lock sign appear will lock up all of keys
except the main switch, Repeat once till the lock sign disappear will unlock the
keys.
Select Switch
(AC110V／220V)

12 P2 P1
3
R2
R1VA
VB
VA
P1
R1 R2 3
P2
12
VA
P1
R1 R2 3
P2
12
2
3
VA
P1
R2
R1
P2
1
L
N
L
N
L
N
L
N
ATC TECH. CO., LTD.
WIRING DIAGRAMS :
2 pipe cooling / heating
Fan motor Fan motor
Fan motor Fan motor
Zone valve Zone valve
Zone valve
Zone valve
AC Power AC Power
AC Power AC Power
L M H C L M H C
L M H C L M H C
3 wire zone valve
VB
Optional chiller chain control（R1, R2）
Chiller
chain
control
4 pipe chill and hot water（heater）control
Over load
Power
Relay
SPECIFICATIONS :
Input power AC110V OR 220V Selectable, 50/60Hz general
Temp. set range
Temp. display range
Temp. resolution
Air volume
5 ~ 30 °C
0 ~ 50 °C
±1 °C
High / Middle / Low 3 speed
The specifications maybe change without notice.
※
Functions
Display
Wiring
Fuse
Output capacity
Cooling / Heating / Dehumidity / Fan only / Sleep / Lock
LCD display ( Optional backlight )
ɸ0.75~1.25mm² 6~9 wires
3A ( 20mm )
3A / 220VAC
2021.12 EV 1.1
VB
AC
NO
NC