Heating engineer
28
3
Chemical conditioning and washing
Water treatment/conditioning or system washing car-
ried out carelessly may result in risks for the appliance,
the system, the environment and health.
Contact specialised firms or professionals for water treat-
ment or system washing.
Check compatibility of treatment or washing products
with operating conditions.
Do not use aggressive substances for stainless steel or
copper.
Do not leave washing residues.
3.8
SYSTEM FILLING
How to fill up the system
After completing all water, electrical and gas connections:
1. Pressurise (at least 1.5 bar) and vent the hydraulic circuit.
2. Let water flow (with appliance off).
3. Check and clean the filter on the inlet pipe.
4. Repeat items 1, 2 and 3 until the pressure has stabilised
(at least 1.5 bar).
3.9
FUEL GAS SUPPLY
Gas connection
▶
3/4 "M
on the right, at the bottom, connection plate (Figure 1.5
▶
Install an anti-vibration connection between the appliance
and the gas piping.
Mandatory shut-off valve
▶
Provide a gas shut-off valve (manual) on the gas supply line,
next to the appliance, to isolate it when required.
▶
Perform connection in compliance with applicable regula-
tions.
Gas pipes sizing
The gas pipes must not cause excessive pressure drops and, con-
sequently, insufficient gas pressure for the appliance.
Supply gas pressure
This appliance is equipped for a maximum gas supply
pressure of 50 mbar.
The appliance's gas supply pressure, both static and dynamic,
must comply with Table 3.3
p. 28, with tolerance ± 15%.
Non compliant gas pressure (Table 3.3
damage the appliance and be hazardous.
Table 3.3
Network gas pressure
Gas supply pressure
Product
category
Countries of destination
G20
[mbar]
G25
[mbar]
G30
[mbar]
G31
[mbar]
G25.1
[mbar]
G25.3
[mbar]
G27
[mbar]
G2,350
[mbar]
II
2H3B/P
AL, BG, CY, CZ, DK, EE, FI, GR, HR, IT, LT,
MK, NO, RO, SE, SI, SK, TR
20
30
30
AT, CH
20
50
50
II
2H3P
BG, CH, CZ, ES, GB, HR, IE, IT, LT, MK, PT,
SI, SK, TR
20
37
RO
20
30
AT
20
50
II
2ELL3B/P
DE
20
20
50
50
II
2Esi3P
; II
2Er3P
FR
20
25
37
II
2HS3B/P
HU
25
30
30
25 (1) (2)
II
2E3P
LU
20
50
II
2L3B/P
NL
25
30
30
II
2EK3B/P
NL
20
30
30
25 (1) (2)
II
2E3B/P
PL
20
37
37
II
2ELwLs3B/P
20
37
37
20 (2)
13 (2)
II
2ELwLs3P
20
37
20 (2)
13 (2)
I
2E(S)
; I
3P
BE
20
25
37
I
3P
IS
30
I
2H
LV
20
I
3B/P
MT
30
30
I
3B
30
(1) GAHP-AR not approved for G25.1, G25.3 gases.
(2) GA ACF not approved for G25.1, G27, G2.350, G25.3 gases.
Vertical pipes and condensate
▶
Vertical gas pipes must be fitted with siphon and discharge
of the condensate that may form inside the pipe.
▶
If necessary, insulate the piping.
LPG pressure reducers
With LPG the following must be installed:
▶
A first stage pressure reducer, close to the liquid gas tank.
▶
A second stage pressure reducer, close to the appliance.
