Immergas NIKE Mini Export, Руководство пользователя

Страница: 7 / 32

Technical documentation Technical documentation
STNME ed 07/03
5
NIKE MINI
The hot water used for central heating and the d.h.w. supply is produced by a primary circuit and a
secondary circuit (
domestic hot water ), which operate according to need.
PRIMARY CIRCUIT
(BOILER CIRCUIT)
The primary circuit with relevant control and safety devices is started every time there is a
central heating, domestic hot water request or antifreeze request.
- OPERATION
The heat contained in the flues produced by combustion is absorbed by the copper blades of the
water-gas exchanger (8) which, in turn, transfers this to the water that circulates inside by means
of the boiler pump (16).
The hot water then directly enters the heating system through the delivery pipe (M) and return
pipe (R).
- CIRCULATOR
This operates on the primary circuit return and
is physically located on the brass return
manifold unit.
It is connected to the monobloc and primary
exchanger by means of pipes with threaded
fittings.
The casing features a threaded fitting onto
which the automatic release valve (1) is
fastened.
- HEAD FLOW GRAPH
The curve representing the system flow and
head ratio depends on the speed of pump
operation.
The curves shown on the graph alongside
refer to:
- A = Circulator at top speed
- B = Circulator at second speed
- C = Circulator at top speed with by-pass
(optional) on
- D = Circulator at second speed with
by-pass
(optional) on