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2.2.5. Natural Gas and LPG Connection
(Device Category I2H, II2H3P)
Our combi devices are manufactured to be operated with methane gas
(G20) and L.P.G. Gas supply pipes should be equal to or higher than 3/4"G
combi connections. Prior to making the gas connection, a thorough internal
cleaning should be made to all fuel supply installation pipe furnishings as
possible wastes may distort smooth operation and reliability of the combi.
Only a mains gas supply can be used with the combi (see the label located
on the combi device). In case of any conversions to the supply, changes
should only be made to the combi by an authorized professional. Also, in
case of reduced pressure, the network dynamic pressure (methane or LPG)
used for supplying the combi should be carefully controlled and will impact
the combi boiler strength. Ensure that gas valve connection is correct.
Flammable gas supply pipe should be able to supply correct adequate
gas amount to the boiler when the combi is at full power and be projected
and sized according to force and local gas company specification and
instructions in order to guarantee the device efficiency. Connection system
should comply with gas company legal regulations.
2.2.6. Flammable Gas Quality
The combi is designed to be used with pure fuel not containing any foreign
substances; therefore, required filter systems must be available in the gas
supply line (for ensuring purification of the fuel).
2.2.7. In Case of Using LPG Tank
LPG use is recommended for heat requirements over 24 kW. New LPG stock
tanks may contain settled gas residues (nitrogen) however, that fouls the
mixture assigned to that device and may cause abnormal operations.
- Various alloy layers may be formed during transit of LPG gas in tanks
depending on mixture compositions. That causes a change in heating
power of mixture assigned to the device and may compromise efficiency of
the device.
2.2.8. In Case of Using Bottled Gas
• 300 mmSS pressurized hood should be used for LPG.
• 500 mmSS hood should not be used.
• 370 mmSS pressurized hood should be used for Propane.
• Do not place tubes in cold places at risk of snow or.
• Do not place tubes in hot places containing ovens or
• Do not make connections with single tubes and use LPG collector set for
double, triple uses.
• The distance between the collector and tube should be maximum 125 cm.
• Copper pipe installation should not use for distances
longer than 125 cm.
• Hose connection ends should be tightened with clamp
and no other tools should be used.
• Gas installation rules with use of LPG tank and industrial tubes should
comply with local standards and to be performed by expert installation
teams and certified by the company undertaking the construction. In
case of failing to fulfil these conditions, combi will not be covered under
warrantee by Warmhaus Authorized Services.
Figure 7
LawaPlus Combi dimensions and connections
LPG
LPG
Ball Valve
COLLECTOR
370 mmSS
2 kg
Hood
12 kg or
24 kg
LPG TUBE
Figure 8
Combi bottled gas connection
Warmhaus LawaPlus
A: Central heating flow
B: Domestic hot water outlet
C: Gas inlet
D: Domestic hot water inlet
E: Central heating return
F: Filling valve
G: Manometer
H: Pressure relief valve outlet
I: Drain point
J: 230V 50HZ AC
420
725
MODE
RESET
+
+
208
208
118
118
288
A
B
C
D
E
94
136
74
65
148
65
65
G
F
H
I
A CENTRAL HEATING FLOW
B
DOMESTIC HOT WATER OUTLET
C
GAS INLET
D DOMESTIC HOT WATER INLET
E
CENTRAL HEATING RETURN
F
FILLING VALVE
G MANOMETER
H PRESSURE RELIEF VALVE OUTLET
I
DRAIN POINT
J
230V 50HZ AC
J
WARMHAUS LAWA PLUS
