Thermia iTec XT Installation Guide

6.4 Cable connections
An appropriate installation is where there is approximately 300 mm free cable between the heat pump and the building. It is inappropri-
ate to bolt trunking between the heat pump and the wall. This is because vibrations can then be transmitted from the heat pump
through the trunking to the walls of the house.
UV resistant cable must be used for outdoor power cables. Cable choice must follow applicable local and national regulations. The cable
must be screened with the one end of the screening (it does not matter which end) earthed to a ground block. When the power cable is
to be connected to the terminal block, a screwdriver is used to open the terminal block.
6.4.1 Between indoor unit and outdoor unit connection cable specifications
Outdoor sensor cable
UV resistant, 0.75mm², 2-wire, for outdoor use
Communication cable
UV resistant, shielded, twisted pair (2, or 4 wire to include flow guard control) for outdoor use. The snap-on ferrite included with the
outdoor unit must be mounted on the communication cable, see chapter below.
Main supply cable
UV resistant for outdoor use
When installing the indoor unit in a computer room or network room, use a double shielded (Tape aluminum / polyester braid + cop-
per ) cable.
Terminal overview:
F2
L1:1
L1:1
101.2
101.1
101.4101.3 101.6101.5
101.16
101.8
102.4102.3 102.2102.1 102.6
102.5
102.8
102.7
L1
N
L1
N
N N
N N
COM
110
111
113
114
116.1
118.1
COM COM COM COM115
116.2
COM
119.3 119.2 118.5 118.4
COM 119.4
COMCOM
BUS_ABUS_B
CN80.1 CN80.2
CN80.1 CN80.2
121.3
121.5
121.1
GND
119.1
COM
118.3
118.2
F3 F4F1 F2
1
2
1. Communication between indoor unit and out-
door unit.
2. Flow guard control.
Installation Guide iTec XT
Thermia AB AWIXT01IG0102
47

Thermia iTec XT Specifications

General

Brand	Thermia
Model	iTec XT
Category	Measuring Instruments
Language	English