Nordmann AT4 D Series, Mounting Instructions

Page: 43 / 52

43
Steam bath fans M3/M4 (2­Fan mode) and M5 ( 1­fan mode)
– 2­fan mode
The fans M3 (exhaust air) and M4 (supply air) are connected to the
appropriate terminals of terminal bloc “X25” on the steam bath board.
The voltage supply of the fans is made either via the internal 230 VAC
supply or an external 12 V or 24 V supply.
– 1­fan mode (three­stage)
The three­stage fan M5 is connected to the appropriate terminals of
terminal bloc “X26” on the steam bath board. The voltage supply of the
fan M5 is made via the optional transformer T1.
For 1­fan mode (three stage) terminal bloc “X25” must be equipped with
cable bridges as shown in the wiring diagram.
The cross­section of the connecting cables must comply with the applicable
local regulations.
T1
M5
FAN
AT4 D
ext.
N N PE
L1 L1
Q9
230 V/1~/50..60 Hz
L N PE
F9
XE3
Supply F
AN
(Light 24 V)
24V 18V
230V
L N
15V 0V
1-Fan Mode 1-Fan Mode
X25
NO NO AUX1 AUX2 COM COM
FAN 1
2-Fan Mode
FAN 2
X26
FAN 0VAC
1-Fan Mode
8 A
250 V
AC
8 A
250 V
AC
X27
FAN 0V
LIGHT SUPPLY OUT
J2
EXT. TRAFO IN
24V 0V 18V15V
F7
4AT
M3 M4
FAN 1
(Exhaust)
FAN 2
(Supply)
N N PE
L1 L1
Q9
230 V/1~/50..60 Hz
L N PE
F9
XE3
2-Fan Mode
24V / 12V
Supply on site
X25
NO NO AUX1 AUX2 COM COM
FAN 1
2-Fan Mode
FAN 2
X26
FAN 0VAC
1-Fan Mode
8 A
250 V
AC
8 A
250 V
AC
X27
FAN 0V
LIGHT SUPPLY OUT
J2
EXT. TRAFO IN
24V 0V 18V15V
F7
4AT
AT4 D
ext.