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4
CONNECTION TO POWER MAINS
DISCONNECT THE UNIT FROM POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE POWER MAINS CONNECTION SHALL ONLY BE PERFORMED BY A QUALIFIED
ELECTRICIAN WHO IS AUTHORIZED FOR UNASSISTED OPERATIONS WITH ELECTRIC UNITS
OF POWER VOLTAGE UP TO 1000 V AFTER CAREFUL STUDY OF THE USER’S MANUAL.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE MANUFACTURER’S
LABEL. ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED AND WILL VOID THE
WARRANTY.
The units are designed for connection to AC 230 V/50 Hz single- or 400 V / 50 Hz three-phase power mains depending on the unit type. The
cable cross section must be in compliance with the unit power consumption, wire type, maximum heating temperature, insulation type, cable
length and installation type.
Use cables with copper wires only!
The unit is connected to power supply on the terminal block according to the wiring diagram and terminal marking. Connect the control and
power cables in compliance with the terminal marking and polarity.
Connection to power mains must be performed via an automatic circuit breaker with magnetic trip, integrated into xed house cabling with
the tripping current exceeding the unit current consumption.
EXTERNAL WIRING DIAGRAM FOR THE MPA 800 W, MPA 1200 W, MPA 1800 W AND MPA 2500 W UNITS
Freemax MX
L N PE 1
L
2
N
3
PE
4
PE
5
N
6
L
7
1
8
2
9
c
10
no
11
nc
12
c
13
no
14
1
15
2
16
3
17
6
18
5
19
1
20
9
21
2
22
3
23
4
24
7
25
1
26
2
27
1
28
2
29
1
30
2
31
1
32
1
AC208EM2+LP
Cooler activation signal
(NO contact)
9156 7
8
432
P1*
12
PK1*
AI1 AI3 AI4AIgnd
AI5AIgnd
DIgndDI8
DI3
AI7 DO1 DO2 DO4
DI1
DI2
DIgnd
AI6AO3
24V AC
~
21
DD1*
13 2
PD1
1 2
t°C
TE1
1 2
t°C
TE3
1 2
t°C
TE4
1 2
t°C
TE5
+ Y U-
32 51
SM2*
LN
21
SM1*
LNPE
M3*
PEU2
Z
U1
M1
— ELECTRIC SHOCK HAZARD!
DI7DI6DO6
DO5DO3
24V AC
~
230V AC
~
K1
190V AC
~
160V AC
~
Designation Name Type Cable
M1 Supply fan max 0.8 kW
M2* Circulating pump max 0.3 kW 3 х 0,75 mm
2
DD1* Dry run protection relay NC 2 х 0,75 mm
2
SM1* Supply air damper actuator LF230 2 х 0,75 mm
2
SM2* Heat medium regulating valve actuator LR 24 SR 3 х 0,75 mm
2
PK1* Contact from re alarm panel NO 2 х 0,75 mm
2
P1 Remote mounted control panel AC208EM2+LP
PD1 Pressure dierential switch on the supply lter NC
TE1 Outdoor temperature sensor PT 1000 ST-01
TE3 Return heat medium temperature sensor PT 1000 STw-02
TE4 Freeze protection sensor of the water heater PT 1000 STw-02
TE5 Supply air temperature sensor PT 1000 STa-02
1. The system is operable in case of no DD1 uid pressure switch in the water heater. In this case the contacts 11 and 12 must be jumped.
2. The maximum connecting cable length from the P1 remote control panel is 10 m.
3. *— not included into delivery set, available as a specially ordered accessory.
4. ** maximum connecting cable length is 20 m.