Connection To Power Mains - Vents MPA W Series User Manual

The heating water circuit must ensure all the required functions specific to the water heater control and safety in addition to
maintaining the proper hot water temperature and heat medium flow according to the specifications contained in the design
documentation.
1
1.
Water heater
2.
Shuto ball valves.
3.
Circulation pump.
4.
Bypass damper.
5.
Boiler.
6.
Heat medium control valve.
7. Non-return valve.
8. Coarse lter.
9. Water pressure sensor (NC).
The supply air temperature sensor TE5 is installed downstream of the water heater (along the air flow stream) and provides
supply air temperature regulation.
The filter pressure switch PD1 is installed in such a way that the relay negative input (-) is placed in the lower pressure area
(i.e. downstream of the filter along the air stream) by means of a tube whereas the positive input (+) - in the higher pressure area
(i.e. upstream of the filter along the air stream). The pressure differential value on the pressure switch must correspond to the
maximum pressure differential on a contaminated filter (250 Pa).
CONNECTION TO ELECTRIC MAINS

ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED AND WILL
VOID THE WARRANTY.
The air supply unit is designed for an AC electric mains:
230 V / 50 Hz single-phase for MPA 800 W ... 2500 W / MPA 800 W ... 2500 W LCD;
•
400 W / 50 Hz three-phase for MPA 3200 W ... 5000 W / MPA 3200 W ... 5000 W LCD.
•
The unit connection must be made using durable, insulated and heat-resistant conductors (cables and wires) with the minimum
section of 1 mm2. The conductors are routed to the terminal box and the control unit through sealed lead-ins. The air supply unit
is connected to the electric mains via an automatic cut-out switch with a magnetic breaker built into the stationary wiring. The
minimum cut-out switch trip current must higher than the rated current consumption of the unit. The QF external switch location
must ensure free access for quick shutdown of the air supply unit. The protection trip current must be consistent with the current
consumption of the air supply unit.
MPA ... W air supply units are connected via terminal block X1 inside the terminal box in accordance with the terminal
designations given inside the terminal box and the connections diagram:
V38EN-02.indd 11
Mixing unit diagram
3 4
2
7 9 8
6
2
M
Single-phase connection
QF X1
L
L
~230 V,
50 Hz
N
N
PE
QF − automatic circuit breaker
(to be purchased separately);
X1 − terminal block.
Heat medium control
valve actuator
5
Three-phase connection
L1
L2
~400 V,
50 Hz
L3
PE
QF X1
L1
L1
L2
L2
L3
L3
TW1
TW1
TW2
TW2
U1
V1
W1
TW1
TW2
PE
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