Robur K18 Hybrigas, Installation, Use And Maintenance Manual, Page: 32 / 60

Heating engineer
32
3
Figure 3.9
Jolly valve on boiler condensing block position
3.8 BOILER SAFETY VALVE DRAIN DUCTING
CONNECTION
The connection between the safety valve discharge and the con-
nection plate of the boiler module is already provided inside the
boiler module.
The installer must provide the discharge hose from the 1/2"
M connection of the boiler module connection plate (detail
V Figure 1.10 p. 17), which will cross the K18 Hybrigas unit
connection plate through the appropriate free space (detail F
Figure 1.4
p. 11).
3.9
FUEL GAS SUPPLY
Gas connection
▶
3/4" M
on the rear, at the bottom, connection plate (Figure 1.4 p. 11).
▶
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 load losses and, conse-
quently, insufficient gas pressure for the appliance.
Supply gas pressure
The appliance's gas supply pressure, both static and dynamic,
must comply with Table 3.3 p. 32, with tolerance ± 15%.
Non compliant gas pressure (Table 3.3 p. 32) may
damage the appliance and be hazardous.
Table 3.3
Gas network pressure
Gas supply pressure
Product
category
Countries of destination
G20
[mbar]
G25
[mbar]
G30
[mbar]
G31
[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
AL, BG, CZ, ES, GB, HR, IE, IT, LT, MK, PT, SI, SK, TR 20 37
RO 20 30
II
2ELL3B/P
DE 20 20 50 50
II
2Esi3P
FR 20 25 37
II
2HS3B/P
HU 25 30 30
II
2E3P
LU 20 50
II
2L3B/P
NL 25 50 50
II
2E3B/P
PL 20 37 37
I
2E(S)
BE 20 25
I
3P
BE 37
IS 30
I
2H
LV 20
I
3B/P
MT
30 30
I
3B
30
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.
3.10 COMBUSTION PRODUCTS EXHAUST
Compliance with standards
The appliance is approved for connection to a combus-
tion products exhaust duct for the types shown in Table
1.2 p. 22.
Flue gas exhaust connection
Heat pump module:
▶
Ø 80 mm (with gasket), on the rear, at the top (detail D Figure