24
ENG
To obtain the maximum head available to the
system, turn off the by-pass by turning the
union to the vertical position (fig. 17/a).
3.7 ELECTRICAL WIRING
OF ZONE HEATING
SYSTEMS
When installing a system of this type, use a
separate electrical line to which room thermo-
stats with their local valves will be connected.
Connect micro switches or relay contacts on
terminals 15-16 of the “TA”connector of the
electronic card after removing the existing
jumper (fig. 18).
CR1
CR
Connettore "TA"
L
N
TA
TA
1
VZ
R
VZ1
R1
NOTE: Relays are used only if the
area valves have no microswitches.
“TA” connector
KEY
TA-TA1 Zone room stat
VZ-VZ1 Zone valve
R-R1 Zone relay
CR-CR1 Relay contact or micro zone valve
Figure 18
By-pass inserito
By-pass escluso
Figure 17/a
By-pass on
By-pass off
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