M
1 2 3 4 5 PE
A
SF 5
X1
SF 4
F3
P 3
N 2
H2
V2 1
SF
X2
SF
N
P
PE
"On"
H1
"Steam"
"Service"
"Error"
-
Signal
+
max 20V
+4.25VDC
B1
+
Y
Connection diagram
200...240V
50...60Hz
K2
N
M
-
-
+
+
+4.25VDC
+4.25VDC
-
B2
B3
140Ω-10 kΩ
L1
N
A
Control p.c.b.
B1
Controller (active)
B2
Controller (passive)
B3
Humidity sensor (only for "IT" units when internal controller is activated)
F1
Supply fuses power unit (quick-acting)
F2
Supply fuse control unit (2 A, slow-acting)
F3
Unit fuse (2 A, slow-acting)
H1
Remote operation and fault indication (option "Z242")
H2
Step control board (option "Z243")
K1
Main contactor power unit
K2
Maximum humidistat or flow monitor (not suitable for On/Off control)
M
Ventilation unit (option "Z217/Z218")
Q
Main switch supply power unit/control unit
T
Auto-transformer control unit (for voltages >250 V, option "Z248")
X1
Connecting jumper (if no ventilation unit connected)
X2
Connecting jumper (if no maximum humidistat or flow monitor connected)
F1
L1
PE
F2
Q
Q
Defensor Mk4
A
SF
X2
SF
N
P
PE
T
Sensor
TR116
F2
PE
L3
L2
L1
K1
L1
L2
L3
PE
PE
Output
230V
Input 400...660V
Q
F2
L1 L2
17