Connecting Tr2 Room Thermostat; Mains Voltage External Controls Connections - Worcester ZWBR 7-28 HE plus Installation And Servicing Instructions

Electrical connections
y Cut cable grommet to diameter of cable.
Fig. 26
y Feed cable through cable grommet and connect the
mains supply cable, see fig. 27.
y Secure cable in cable grommet by means of cable
grip.
Fig. 27
4.2

Connecting TR2 Room thermostat

The TR2 should be connected to terminals 3, 4 and F
beneath the Textdisplay, page 8, fig. 4, item 422.
22
4.3 Mains Voltage external controls
connections
NOTE: Only double insulated controls not requiring an earth can be used
Ns Ls L
R
ST8
Remove Link
230 V R oom Thermostat Connections
Ns Ls L
230 V r oom thermos t at and
Programmer Connections
Fig. 28
Ns Ls L
R
ST8
Motor
230 V Pr ogrammer Connections
R
ST8
Series
connection
to be made
safe
Motor
6 720 610 576 - 22.1O
6 720 610 597 GB (01.07)