43
Solar thermal system installation and service
instructions
Fig. 34
A
Solar circuit fill valve
!
Please note
Overheated collector areas and overheated heat
transfer medium can cause burns/scalding and
equipment damage.
When working on the collector and the solar cir-
cuit, protect the collector area against solar irra-
diation.
1.
Thoroughly flush the on-site pipework.
2.
Fill solar circuit with "Tyfocor LS" via fill valve
A
.
■
Minimum system pressure: 1.7 bar (0.17 MPa)
■
Permissible operating pressure: 6 bar (0.6 MPa)
!
Please note
To prevent appliance damage, only use
"Tyfocor LS".
Never fill with water.
3.
Close ball valve in fill valve
A
.
4.
Open the air vent valve at the solar collector.
5.
Start the solar circuit pump via the actuator test
(see page 91).
6.
Leave the solar circuit pump running until the solar
circuit is fully vented. If the system pressure is
below 1.7 bar (0.17 MPa), add more "Tyfocor LS".
7.
Close the air vent valve at the solar collector.
8.
Check the system pressure. If the system pressure
is below 1.7 bar (0.17 MPa), add more "Tyfocor
LS".
Checking all connections on the heating water side and DHW side for leaks
Naming the heating circuits
In the delivered condition, the heating circuits are des-
ignated
"Heating circuit 1"
,
"Heating circuit 2"
and
"Heating circuit 3"
(if installed).
If the system user prefers, the heating circuits can be
designated differently to suit the specific system.
Enter names for heating circuits:
Operating instructions
Checking the gas type
The boiler is equipped with an electronic combustion
controller that adjusts the burner for optimum combus-
tion in accordance with the prevailing gas quality.
■
For operation with natural gas, no adjustment is
therefore required across the entire Wobbe index
range.
The boiler can be operated within the Wobbe index
range 9.5 to 15.2 kWh/m
3
(34.2 to 54.7 MJ/m
3
).
■
For operation with LPG, the burner must be conver-
ted (see "Gas type conversion" on page 44).
Commissioning, inspection, maintenance
Filling the solar circuit
5773 238 GB
