Page 18
Installation, use and maintenance guide
SlimQuadro Idra 14
VNR
( z o n a c o n p i u ' a s s o r b i m e n t o )
El e t t r o v a l v o l a s e m p r e a p e r t a
COLLETTORE
COLLETTORE
TA
TA
VEC
TA
S
VM3 VT
A
P
P
A
R
E
C
C
H
IO
VSP
A
R
A : andata impianto riscaldamento
R : ritorno impianto riscaldamento
S : saracinesca
VNR : valvola di non ritorno
VEC : vaso di espansione chiuso per protezione impianto
VM3VT : valvola miscelatrice 3 vie termostatica 55°c punto fisso
VSP : valvola saracinesca (da parzializzare in funzione delle
perdite di carico dell'impianto
5.1.1 GUIDELINES FOR PLANTS WITH ZONE VALVES
Note: above 61°C, the generator pump is always
active as it is essential to dissipate the heat;
therefore the solenoid valve must be open for the
following reasons
:
• to prevent the generator from continually
starting up and shutting off caused by the
inevitable loss of heat to the header and/or due to
plant tubing.
• to prevent the generator from raising the water
temperature by just a few degrees each time it is
switched off then back on until it shuts down due
to exceeding the maximum threshold temperature
of 98°C (manually reset thermostat).
To adjust the ambient temperature in which the
valve opened, we recommend connecting the
room
temperature
thermostat
to
the
CHRONOTHERMOSTAT MODEM terminal (free
contact COM-NO see para. 7) that allows the
machine to be shut off via an external contact and
therefore also restarted.
This ensures that the generator only activates if
there is a real request for heat from the zone in which the chronothermostat is installed.
Several parallel-connected room temperature thermostats can be installed in the CHRONOTHERMOSTAT MODEM. This will
ensure that the zone requesting heat (contact closed) automatically activates the generator.
In the event of frequent startups and shut offs due to the heat produced by the generator not being absorbed, the manual reset
safety thermostat trips and blocks the generator.
N.B.: Use chronothermostats having at least 2°C hysterisis.
Legenda
Key
Collettore
Header
Elettrovalvola sempre aperta
(zona con più assorbimento)
Solenoid valve always open
(zone with the most absorption)
Apparecchio
Appliance
A: andata impianto riscaldamento
A – heating plant delivery
R: ritorno impianto riscaldamento
R – heating plant return
S: saracinesca
S – gate valve
VNR: valvola di non ritorno
VNR – nonreturn valve
VEC: vaso di espansione chiuso per
protezione impianto
VEC: closed expansion tank for
plant protection
VM3VT: valvola miscelatrice 3 vie
termostatica 55°C punto fisso
VM3VT: Three-way thermostatic
mixing valve 55°C, fixed point
VSP: valvola saracinesca (da
parzializzare in funzione delle
perdite di carico dell’impianto)
VSP: Gate valve (throttle according
to pressure drop in the system)
