Hoval RoofVent CON-9, Design Handbook

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6.2 Options for the zone control panel
Alarm lamp
A lamp for displaying alarms of priority A is installed in the
door of the zone control panel.
Type: SSL
Socket
A 1-phase socket with a 2-pin circuit breaker is installed in
the zone control panel. This socket serves for connecting
maintenance tools. Its circuit is not cut out by the safety
relay.
Type: SST
Control of the main pump
The high-voltage section required for controlling the main
pump (circuit breaker, contactor, thermal relay and switch) is
installed in the zone control panel.
Type Pump Output
1PPS 1-phase max. 2 kW
3PPS 3-phase max. 4 kW
Table L15: Technical data for the pump control
2-pin circuit breakers
The circuit breakers for the transformer have two pins.
Type: 2PS
Power supply for indoor climate units with integrated DigiUnit
controller
The power supply for Hoval indoor climate units with inte-
grated DigiUnit controller is integrated in the zone control
panel. The following are installed in the panel:
■ The required circuit breakers and output terminals for
each unit
■ The safety relay (external)
The size of the safety relay depends on the rated current. It
replaces the zone control safety relay.
Type Power supply
SIA3 with 3-pin circuit breakers
SIA4 with 4-pin circuit breakers
Table L16: Power supply
Rated current
1)
Type 3-pin Type 4-pin
0 – 25 A NT-3/40 NT-4/40
26 – 35 A NT-3/60 NT-4/60
36 – 50 A NT-3/80 NT-4/80
51 – 65 A NT-3/100 NT-4/100
66 – 75 A NT-3/125 NT-4/125
76 – 100 A NT-3/160 NT-4/160
101 – 155 A NT-3/250 NT-4/250
1)
= Nominal current consumption of all indoor climate units in the system
Table L17: Size of the safety relay without switch-off of the neutral wire (3-pin) and
with switch-off of the neutral wire (4-pin)
Integration of indoor climate units without integrated DigiUnit
controller
Indoor climate units without an integrated DigiUnit controller
are, for example, TopVent
®
supply air units or additional units
that are added on depending on the heat or cool demand.
For such units, the control system and the power supply
(circuit breaker, contactor, output terminals) is integrated in
the zone control panel.
There are 2 possibilities:
■ Separate connection: 1 DigiUnit controller or 1 DigiEco
controller is installed for each unit (including the power
supply for the indoor climate unit).
■ Parallel connection: 1 DigiUnit controller or 1 DigiEco
controller is installed for a group of units, including the
power supply for the first unit. Additional output terminals
are installed for the parallel connection of additional units.
The number of parallel controlled units is restricted by the
maximum switch power of 6.5 kW (∆ / Y connection).
Type Design Use
DU5 DigiUnit controller including
power supply for 1 unit
For main units
without integrated
DigiUnit controller
DO5 DigiEco controller including
power supply for 1 unit
For additional units
SV Power supply for additional
units
Parallel connection
Table L18: Integration of indoor climate units without integrated DigiUnit controller
Cooling in the 2-pipe system
The same coil is used for heating and cooling. The DigiNet
system is switched between heating and cooling manu-
ally. A selector switch, two switch relays and the additional
terminals for enable cooling and the trouble input cooling are
installed in the zone control panel.
Control systems
Options