Immergas NIKE Mini 24 Export Manual page 12

Technical Documentation
NIKE Mini Hydraulic circuit.
The hot water for central heating and domestic use is produced
by a primary and a secondary (d.h.w.) circuits that work as
required.
Primary circuit (Boiler Circuit).
The primary circuit, with relevant control and safety devices,
is operated each time either a central heating or d.h.w.
request is made.
Operation (see NIKE Mini).
The heat contained in the fumes produced by combustion is
absorbed by the copper blades of the water-gas primary ex-
changer (6) which, in turn, transfers it to the water circulating
inside thanks to the boiler circulator (13).
The water is transferred directly into the system or can be devi-
STNM ed 07/07
Technical Documentation
Legend:
1 - D.h.w. flow switch
2 - Flow limiter
3 - Filling valve
4 - Gas valve
5 - Burner
6 - Primary exchanger
7 - Draught diverter
8 - Flue safety thermostat
9 - Delivery probe
10 - Overheating safety thermostat
11 - System expansion vessel
12 - Automatic air vent
13 - Circulator boiler
14 - D.h.w. exchanger
15 - 3-way valve (motorised)
16 - Automatic by-pass
17 - Draining valve
18 - 3-bar safety valve
G - Gas supply
AC - Domestic hot water outlet
AF - Cold water inlet
R - System return
M - System delivery
ated to the instant stainless steel plate exchanger (14).
This depends on the position of the motorised 3-way valve
(15) which, when idle allows the water to flow to the d.h.w.
exchanger (14) while if a central heating request is made it
deviates the flow to the system's delivery (M) and return (R)
pipes.
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NIKE Mini Export