THERMOROSSI PIDRA 18, Инструкция по установке, эксплуатации и обслуживанию

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Installation, use and maintenance guide
PIDRA 18
Page 17
ENG
5.5 EXAMPLE OF HYDRAULIC DRAWING WITH BOILER COILS AND SYSTEM
Legenda Key
Sonda PT100 Sensor PT100
Alimentazione dalla scheda alla VDEV3V Power supply from the board to the
VDEV3V
Alla morsettiera CN5 (Morsetti 5 - 6) To the terminal block CN5 (Terminals 5 -
6)
Alla morsettiera CN3 (Morsetti 5 -7-8) To the terminal block CN3 (Terminals 5 -
7 - 8)
APPARECCHIO APPLIANCE
In order to guarantee correct absorption of the heat produced by the generator it is advisable to use a boiler tube with volume and
heat exchange capacity suitable for the power of the generator. The boiler tube must have a minimum capacity of 300l. In any case
the boiler tube must be capable of absorbing all the power that the generator is capable of delivering.
If this rule is not observed, the generator could raise the water temperature to such a point as to activate the safety limit thermostat
which stops the fuel from dropping into the burner and therefore forces the appliance to shut off.
The installer must install a three-way motorized valve towards the system
, powered by the appliance’s power unit. The power unit
trips if the domestic hot water sensor (SACS) drops below the minimum preset temperature, by supplying power to pin 8 of the
terminal block CN3, whereas when the SAVS sensor reaches the maximum preset temperature it supplies power to pin 7.
Consequently, the system must be designed in such a way that the hot water produced by the generator can reach the various
rooms by acting on the zone valves.
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 plant’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.
A Heating plant delivery VM3VT Mixing valve set at 55°C
R Heating plant return VSP Gate valve to throttle the flow
S Gate valve VNR Nonreturn valve
VEC Closed expansion tank as protection for the system VDEV3V Three-way diverting valve
S
R
S
VN R
S
S
A
VEC
VM3 VT
VSP
A : andata impianto riscaldamento
R : ritorno impianto riscaldamento
S : saracinesca
VNR : valvola di non ritorno
VEC : vaso di espansione chiuso per protezione impianto
VSP : valvola saracinesca ( da parzializzare in funzione delle
perdite di carico dell' impianto).
VM3VT : valvola miscelatrice term. fisso 55°c.
VDEV3V : valvola deviatrice 3 vie
Al l a m o r s e t t i e r a CN 3
( Mo r s e t t i 5 - 7 - 8 )
Al l a m o r s e t t i e r a CN 5
( Mo r s e t t i 5 - 6 )
Al i m e n t a z i o n e d a l l a s c h e d a a l l a VDEV3 V
So n d a PT1 0 0
schema idraulico - bollitore a serpentino.dft 03/05/2016
APPA
R
E
C
C
H
IO
R
A
V
DE
V
3
V