Viessmann VITOCAL 100-S - Preparing the Electrical Connections

33
Contact humidistat
For area cooling systems (e.g. underfloor heating cir-
cuit, chilled ceiling), a contact humidistat (accessories)
is required.
Requirements for the contact humidistat:
■
Electrical connection, subject to the type of contact
humidistat:
–
24 V (recommendation):
Connection to F11 on the controller and sensor
PCB
–
230 V~, 0.5 A:
Connection to X3.8/3.9 on the luster terminals
■
Installation inside the room to be cooled at the cool-
ing water flow (remove thermal insulation if required)
■
If several rooms with different relative humidity levels
are part of the cooling circuit, fit and connect several
contact humidistats in series:
Design the switching contacts as N/C contacts.
Electrical connection
Preparing the electrical connections
Cables
■
For cable lengths and cable cross-sections: See the
following tables.
■
For accessories:
Cables with the required number of cores for exter-
nal connections.
Prepare an on-site distribution box.
Note
All connections on the control panel, (see page 86)
must be made with flexible cables to ensure that the
control panel can be placed in the service position (see
page 38).
Danger
Damaged wiring insulation wiring can lead to
serious injury from electrical current and result in
appliance damage.
Route cables so that they cannot touch very hot,
vibrating or sharp-edged components.
Danger
Incorrect wiring can lead to serious injury from
electrical current and result in appliance dam-
age.
Take the following measures to prevent drifting
of wires into the adjacent voltage area:
■
Route extra low voltage (ELV) leads < 42 V
separately from cables > 42 V/230 V~/400 V~.
Secure with cable ties.
■
Strip as little of the insulation as possible,
directly before the terminals. Bundle cables/
leads close to the corresponding terminals.
■
If 2 components are connected to the same
terminal, press both cores together in a single
wire ferrule.
Cable lengths in the indoor/outdoor unit
Cables Indoor unit Outdoor unit with
1 fan 2 fans
Power cables
■
230 V~ heat pump control
unit
1.2 m — —
■
230 V~/400 V~ compres-
sor
— 0.7 m 1.5 m
Other connecting cables
■
230 V~, e.g. for circula-
tion pumps
1.2 m — —
■
< 42 V, e.g. for sensors 0.8 m — —
Connecting cable for in-
door/outdoor unit (acces-
sories, 15 m or 30 m long)
■
Modbus 0.8 m 1.0 m 1.5 m
Installation sequence
Only type AWB(-M)-E-AC: Connecting the cooling circuit
6199585
Installation