Installation, use and maintenance guide
COMPACT S22
–S26–S32 EVO5
Page
17
ENG
5.4 EXAMPLE OF HYDRAULIC DIAGRAM WITH INTERSPACED BOILER COILS OR BOILER COILS
Legenda
Key
BOLLITORE AD INTERCAPEDINE
AIR-CASED BOILER
A: andata impianto riscaldamento
A: heating system delivery
R: ritorno impianto riscaldamento
R: heating system 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 system protection
VM3VT: valvola miscelatrice termostatica punto fisso 55°C
VM3VT: thermostatic mixing valve, fixed point 55°C
VSP: valvola saracinesca (da parzializzare in funzione delle
perdite di carico dell'impianto)
VSP: gate valve (throttle according to pressure drop in the system)
APPARECCHIO
APPLIANCE
ATTENTION: The water temperature in the boiler tubes in this case is not adjustable and depends on the system's delivery
temperature, that is the temperature set in the generator. The boiler tubes can be installed on the water return circuit. It is
recommended to install a water softener in the domestic water system in order to maintain the boiler at its peak efficiency.
ATTENTION: it is mandatory to earth the generator. If this instruction is not observed serious damage, which
is not covered by warranty, will result to the body of the appliance. Have a skilled electrician check the
earthing. There must be no electric potential (Volt) between the generator earth and the system’s real earth
(earth plate). To prevent electrochemical corrosion of the appliance body do not use galvanised pipes and
fittings. Other materials must be earthed with special earthing cables in order to obtain a unipotential
earthing system.
S
VNR
A
VEC
B
O
L
L
IT
O
R
E
AD
IN
TE
RC
A
P
ED
IN
E
S
S
VM3VT
VSP
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 termostatica punto fisso 55°c
VSP: valvola saracinesca (da parzializzare in funzione delle perdite di carico dell'impianto
schema idraulico - bollitore a intercapedine.dft 03/05/2016
A
P
PA
RE
C
C
H
IO
R
A