Installation; Boiler Room; Boiler Room Dimensions; Connecting Up System - Sime Estelle HE B4 INOX Manual Del Usuario

2

INSTALLATION

2. 1

BOILER ROOM

The boiler room should feature all the
characteristics required by standards
governing liquid fuel heating systems.
2.2

BOILER ROOM DIMENSIONS

Position the boiler body on the founda-
tion bed, which should be at least 10
cm high. The body should rest on a sur-
face allowing shifting, possibly by
means of sheet metal. Leave a clear-
ance between the boiler and the wall of
at least 0.60 m, and between the top
of the casing and the ceiling of 1 m
(0.50 m in the case of boilers with
incorporated D.H.W. tank). The ceiling
height of the boiler room should be less
than 2.5 m.
2.3

CONNECTING UP SYSTEM

When connecting up the water supply
to the boiler, make sure that the speci-
fications given in fig. 1 are observed.
All connecting unions should be easy to
disconnect by means of tightening
rings. A closed expansion tank system
must be used.
2.3. 1 Accessories (fig. 2)
To ensure boiler efficiency, and a pres-
sure relief valve set to 3 bar (14) and a
hydrometer to check the system pres-
sure (16). Install a pressure relief
valve calibrated to 6 bar (7) on the boil-
er water outlet pipe to prevent the risk
of bursting due to excess pressure
build up. If the boiler safety valve cuts in
frequently, install a 5-litre expansion
vessel (15) with maximum operating
pressure of 8 bar on the hot water cir-
cuit. The tank should be fitted with a
natural rubber food-grade diaphragm.
The central heating circuit pump (4)
can be installed at the rear of the boil-
er in place of the connection union 1"
pos. 3 fig. 4/a (we suggest you mount
the pump without the GRUNDFOS UPS
15-50 air degasser).
2.3.2 Filling the water system
Before connecting the boiler, thor-
oughly flush the system to eliminate
scale which could damage the appli-
ance. Filling must be done slowly so as
to allow any air bubbles to be bled off
through the air valves. In closed-circuit
heating systems, the cold water filling
pressure and the pre-charging pres-
sure of the expansion vessel should be
no less than or equal to the height of
the water head of the installation (e.g.
for water head of 5 meters, the vessel
pre-charging pressure and installation
filling pressure should be at least 0.5
bar).
2.3.3 D.H.W. production
During the preparation of hot water,
the circulating pump installed on the
boiler circuit remains in operation until
the boiler thermostat probe detects
the pre-selected value. Once the boiler
thermostat has reach the set point,
and the selector has been set to win-
ter operation with the room thermo-
stat on demand, the central heating
circuit pump (not supplied) can be actu-
ated. All residual air in the boiler coils
must be bled at the first start-up to
ensure proper operation. To facilitate
this operation, position the slot of the
release screw on the check valve hor-
izontally (6 fig. 2). Once the air has
been bled, return the screw to its
original position. Hot water for sani-
tary use is prepared by the boiler in
AISI 316L stainless steel, which is fit-
ted with a special spiral-shaped stain-
less steel heat exchanger, a magne-
sium anode to protect the boiler and
an inspection flange to simplify check-
ing and cleaning.
2.3.4 Characteristics of feedwater
To prevent lime scale and damage to
the tap water exchanger, the water
supplied should have a hardness of no
more than 20°F. In all cases the water
used should be tested and adequate
treatment devices should be installed.
To prevent lime scale or deposits on
the primary exchanger, the water used
1
to supply the heating circuit should
must be treated in accordance with
UNI-CTI 8065 standards. The water
used for the central heating system
should be treated in the following
cases:
– For extensive systems (with high
contents of water).
– Frequent addition of water into the
system.
– Should it be necessary to empty the
system either partially or totally.
2.3.5 Connection of condensation
water trap (fig. 4/b)
The drip board and its water trap must
be connected to a civil drain through a
pipe (ø 25) with a slope of at least 5
mm per metre to ensure drainage of
condensation water. The plastic pipes
normally used for civil drains are the
only type of pipe which is appropriate
for conveying condensation to the
building's sewer pipes.
2.4

CONNECTING UP FLUE

The flue is of fundamental importance
for the proper operation of the boiler; if
not installed in compliance with the
standards, starting the boiler will be
difficult and there will be a consequent
formation of soot, condensate and
encrustation. The flue used to expel
combustion products into the atmos-
phere must meet the following require-
ments:
– be constructed with waterproof
materials, and resistant to smoke
temperature and condensate;
– be of adequate mechanical resilience
and of low heat conductivity;
– be perfectly sealed to prevent cool-
ing of the flue itself;
– be as vertical as possible; the termi-
nal section of the flue must be fitted
with a static exhaust device that
KEY
1 Drain hose
2 Condensate drain tap
2
Fig. 4/b
37