4
Set-up and installation
Installation and operating instructions
36
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
INFORMATION
The input is not considered for resistance values greater
than the value for "Automatic 2".
INFORMATION
The [HZU] function integrated in the RoCon BF controller
(see the Controller operating instructions) makes it unne-
cessary to connect the EXT connection to the burner
blocking contact connection of the solar system.
4.8
Connect the gas line, check the
burner setting for gas type
DANGER: RISK OF EXPLOSION
Escaping gas is a direct threat to human health and safety.
Even a few sparks can cause major explosions.
▪ Before working on gas-conducting parts, always close
the house gas stop valve.
▪ If there is a smell of gas, air the room thoroughly. Pre-
vent spark and flame formation (e.g. from open flames,
electric switches or mobile phones).
▪ Only heating specialists authorised and trained by the
gas or power supply company should be allowed to work
on gas-conducting parts.
The GCU compact is suitable for operation with E/H natural gas, LL/
L natural gas and liquid gas (propane).
WARNING
Gases from regenerative sources (e.g. biogas) may con-
tain substances that cause corrosion to the gas valve and
can impair its function.
▪ The gas composition must comply with the requirements
on conditions for feeding into the gas distribution grid
(low-pressure pipelines) of the public standard gas sup-
ply.
▪ Gases from regenerative sources (e.g. biogas) may only
be used when they have been previously prepared so
that they can be fed into the public natural gas grid in ac-
cordance with regional regulations.
4.8.1
Important instructions for gas connection
Gas connection
▪ The gas connection complies with the technical regulations for gas
installations, as well as the relevant regulations of the destination
country and the gas supply company.
▪ A thermally triggered blocking device (TAE) and a gas flow mon-
itor (GSW) with a DVGW inspection symbol must be fitted. The
TAE must comply with the test basis of DVGW-VP 301. The di-
mensions of the GSW must comply with the maximum adjustable
rated load of the device.
Gas type
▪ The gas burner is set to gas type "Natural gas" at the factory.
▪ Observe the permitted gas inlet pressure (resting pressure) (see
).
4.8.2
Connecting the gas line
INFORMATION
The standard corrugated gas connection hose can cause a
pressure drop of up to 5 mbar. This does not have a negat-
ive impact on the function of the GCU compact.
1
Connect the factory-installed corrugated gas connection hose
(A) (pipe thread DIN EN 2999 Rp ½") without tension to the gas
supply line.
Fig. 4-41
Gas connection
A
Corrugated gas connection hose
4.8.3
Removing/attaching the heat cell
panelling
1
Unscrew the locking screws from the lid (
, item 1) and
the front panelling of the heat cell (
, item 2).
2
Remove the lid and front panelling of the heat cell.
Assembly is carried out in reverse order.
Pay attention to the stipulated tightening torque (see
).
Fig. 4-42
Removing the upper panelling of the heat cell
1
Cell lid of the heat cell
2
Front panelling of the heat cell
3
Safety gas control block
4
Basic panelling of the heat cell
4.8.4
Checking the gas presetting
1
Compare the available gas type with the position set for the set-
ting screw on the safety gas control block (
, item 3.1).
▪
1 =
Natural gas
▪
2 =
Liquid gas
The gas type must match.
If the burner is not set to the available gas type, change it to the new
gas type (
).
INFORMATION
A changeover of the gas type must also be adjusted in the
controller. Comply with the enclosed control system in-
structions.
Содержание GCU compact Series
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