Cable Preparations; Connecting And Securing The Cable - Worcester Greenstar HIU Installation And Maintenance Instructions Manual

Electrical connection
Heating circuit with radiator
Fig. 23 Example - heating with radiators
Connection Function
Outdoor ambient temperature sensor
BUS connection for Sense II room temperature-
dependent controller
Table 9 Option 1: Sense II room controller connection
Connection Function
External time and temperature control (e.g.
230 V room thermostat)
LR L N
Table 10 Option 2: 230 V programmable room thermostat
Heating circuit without mixer with underfloor heating system
Fig. 24 Example - underfloor heating system
12
T
Connection Function
Outdoor ambient temperature sensor
BUS connection for Sense II room temperature-
dependent controller
Temperature switch, underfloor heating system
Table 11 Option 1: Sense II room controller connection
Connection Function
Temperature switch, underfloor heating system
External time and temperature control (e.g.
230 V room thermostat)
LR L N
Table 12 Option 2: 230 V programmable room thermostat
6.4

Cable preparations

WARNING
Risk of fire due to damaged cables!
Hot appliance parts in the HIU can damage the cables and cause fire.
▶ Do not route cables along hot appliance components.
NOTICE
Damage to control unit!
Small pieces of wire can cause shorts and damage to electronics.
▶ Make sure when stripping the cables that copper strands do not fall
into the module.
▶ Strip the cable so that the earth conductor is longer than the other
wires.
6-8mm
6-8mm
N
L
26-30mm
36-40mm
Fig. 25 Cable preparations (here: power cable)
6.5

Connecting and securing the cable

Each cable entering the control unit must pass through and be secured
by a cable clamp.
0010017852-01 0010017852-01
Greenstar – 6721852556 (2022/11)