The pressure switch with fixed settings
62/52 Pa is able to guarantee the boiler
operation even with air intake and smoke
outlet pipes at the maximum limit of the
length allowed. The signal value of the pres-
sure switch is measured by connecting the
differential pressure gauge to the pressure
KEY
TA-TA1
Zone room stat
VZ-VZ1
Zone gas valve
R-R1
Zone relay
CR-CR1
Zone microvalve or relay contact
connections (10-18 fig. 3).
3.7
MAINS ELECTRICITY
CONNECTION
When installing a system of this type, use a
separate electrical line to which room ther-
"CN1" connector
Connettore "TA"
CR
CR
1
mostats with their local valves will be con-
nected.
Connect micro switches or relay contacts
on terminals 15-16 of the "CN1" connector
of the electronic card after removing the
existing jumper (fig. 19).
4. 1
D.H.W. TEMPERATURE
L
TA
VZ
R
VZ
1
N
NOTA: I relé vengono impiegati solo nel cas
NOTE: Relays are used only if the area valves
le valvole di zona siano prive di micr
have no microswitches.
IT
ES
PT
GB
TA
1
R
1
Fig. 19
81