48
ONE DIRECT ZONE system.
R
M
SE
Pcp
Fig. 90
MULTI ZONE system – with pump and room thermostat.
SE
TZ2
TZ3
TZ1
P3
SP
RL2
RL3
P2
P1
R
M
Pcp
TA2
Fig. 91
MULTI ZONE system – with zone valve and room thermostats.
TZ1
VZ1
VZ2
VZ3
TZ2
TZ3
SE
R
M
Pcp
TA2
Fig. 92
m
CAUTION
Set the parameter "tS 17 = DELAY SYSTEM PUMP AC-
TIVATION to allow the opening of zone valve Vz.
5.15 Refilling or emptying
Before carrying out the operations described below, make sure
that the main system switch is set to “ON”; after a few seconds,
the main display will show on the
Main control panel
, and the
pressure level in the system during refilling can be displayed.
Thu 18 Set 2014
Zone
10:30
Menu
Mode
Off
ON
1.1 bar
Fig. 93
Press the
Mode
button and check that the appliance
function mode is set to
OFF
.
Esc
Back
Off
Fig. 94
If it is not OFF, turn the
encoder to select
OFF
mode and
press the
click
button to confirm.
5.15.1 Method of filling a sealed system
A sealed system must only be filled by a competent person us-
ing a method similar to that shown in figure below.
Stop
valve
Stop
valve
Test cock
Hose
unions
Double chech
valve assembly
Filling loop
temporarily connected
Mains
water supply
Heating
cicuit return
Fig. 95