If the water hardness is more than 20°F, to calculate the total
quantity of water to use, use the formula: (20°F/hardness meas-
ured °F) x 20.
Example with water hardness of 25°F: (20/25) x 20 = 16 l/kW
If the water characteristics are different from those indicated,
it is advisable to use a safety filter on the water delivery pipe
to trap impurities, and a chemical treatment system to protect
against possible deposits and corrosion which could adversely
affect boiler operation.
the conversion factor between °dH (German degrees) and
NOTE:
°F (French degrees) is 0.56 (1°dH = 0.56 x °F).
m
CAUTION
It is useful to note the quantities of water to fill the
system and top it up, and the values of the quality of
water used.
6.8
Plumbing connections
The dimensions of the water fittings of Sime ESTELLE HE B4 INOX
boilers are given below.
ErP
A
B
U
RC
D
E
SB
G
F
H
I
88
VS
M
R
Sc
SI
N
L
Description
A (mm)
B (mm)
D (mm)
F (mm)
G (mm)
H (mm)
I (mm)
L (mm)
N (mm)
M System delivery
R System return
U Domestic hot water output
RC Recirculation
E Domestic hot water inlet
SB Calorifier drainage outlet
VS Fitting for calorifier safety
valve
Sc Condensate outlet (mm)
SI System drainage outlet
m
CAUTION
The installation of a by-pass or flow switch (not sup-
plied) is mandatory for installations in systems with
thermostatic valves or two-way motor-driven valves.
The system's minimum flow rate, which must be guar-
anteed, must not be below the value shown below:
Description
ESTELLE HE B4 INOX ErP
6.9
Smoke outlet and combustion air inlet
Sime ESTELLE HE B4 INOX ErP
B" (B23P) and "Type C" (C23P), while the smoke discharge and
combustion air intake system must be made as explained below.
Fig. 30
Description
A (mm)
B (mm)
Øi - inner diameter (mm)
d
IT IS FORBIDDEN
– Do not block or reduce the size of the air vents of the
place of installation or the appliance.
EN
ESTELLE HE B4 INOX ErP
69
145
165
878
43
445
360
55
101
G 1"
G 1"
G 3/4"
G 3/4"
G 3/4"
G 1/2"
G 1/2"
Øe 25
G 1/2"
System minimum flow rate (l/h)
∆=30°C
900
boilers are classified as "Type
B
Øi
A
Fig. 31
ESTELLE HE B4 INOX ErP
511
58
130