Dru Verwarming KAMARA 7KW Manuel D'installation page 11

For the 7kW version, the restrictor (supplied) is mounted
on the combustion fan. Please note the restrictor is part
of the venturi on the combustion fan.
For the 7kW Power Flue, the restriction is 22.5 mm when
using natural gas and propane.
In Table 2 below, you can see the settings of the
restriction in relation to the construction of the discharge
system and the type of gas that is used
At the 12kW and 16kW versions, the restriction – if
necessary – will be placed in the flue gas discharge
connection of the manifold, with a heat-resistant sealant
(see fig. 7).
Table 2: Relations between restriction, discharge system construction and type of gas
Type Type of gas
7kW G20/G31
12kW G20
G31
16kW G20/G31
Number of tube length
90º bends (meter)
0 0
0 1-10
1 1-10
2 1-10
3 1-6
4 1-2
0 0
0 1-10
1 1-10
2 1-10
3 1-6
4 1-2
0 0
0 1-10
1 1-10
2 1-10
3 1-6
4 1-2
0 0
0 1-3
1 1-3
9
INSTRUCTIONS FOR INSTALLATION
At the 12kW Power Flue, a restriction is only required if
the appliance is connected directly to the wall-terminal.
When using natural gas, the restriction will be 36 mm, and
when using propane 45 mm.
For the 16kW Power Flue, a 45 mm restriction is also
only required in case of a direct connection to the wall-
terminal. This value applies to the usage of both natural
gas and propane.
Restriction
(mm)
22,5 Direct connection to wall-terminal
22,5
22,5 Restriction is a fixed part
22,5 of venturi tube
22,5
22,5
36 Direct connection to wall wall-
terminal
none
none
none
none
none
45 Direct connection to wall-terminal
none
none
none
none
none
45 Direct connection to wall-terminal
none
none
Remarks
Kamara