External Frost Protection; Connecting A System Boiler To A Cylinder - Biasi GARDA HE SYSTEM M96.28SR/P User Manual And Installation Instructions

Installation
To fused spur
isolation switch
3 2 1
J
Fig. 6.13
8 Connect the room thermostat between ter-
minals 1 and 3 as shown in Fig. 6.14.
Do not connect live wires to terminals to
which the room thermostat must be con-
nected.
Room thermostat
T
3 2 1
Fig. 6.14
9 Route the electrical supply flexible cord and
the external control flexible cord as illustrated
in Fig. 6.15.
Lock the flexible cords in place with the flexible
cord clamps
26
L N
Power supply
terminal block
External controls
terminal block
Power supply
terminal block
L N
External controls
terminal block
To the external
control device
Fig. 6.15
6.10

External frost protection

10 Connect the frost thermostat between ter-
minals 1 and 2 as shown in Fig. 6.16.
Do not connect live wires to terminals to
which the room thermostat must be con-
nected.
Frost thermostat Room thermostat
T
3
Fig. 6.16
6.11 Connecting a system boiler
to a cylinder
Two schematic wiring diagrams are given in this
section showing two possible ways to connect an
external programmer to a mid --- position diverter
valve to provide independent timed and thermo-
static control of heating and hot water.
Fig. 6.17 and Fig. 6.18 are divided in two parts.
The upper shows the single components used on
the diagrams with their connection to the 10 way
junction box. The bold numbers represent the ter-
To the fused spur
isolation switch
L N
T
Power supply
terminal block
2 1
External controls
terminal block