SOLARFOCUS Therminator II, Installation Manual

Page: 29 / 44

Hydraulic connection
Installation manual thermi
nator
II touch 29
6.4 Boiler safety group (BSG)
Install the BSG in the boiler supply line, at the highest
point of the line, as close as possible to the boiler.
Installation position: vertical, see illustration.
!
ATTENTION - Do not install any barriers in the
pipework that could render the boiler safety
group ineffective.
6.5 Thermal overload protection
The thermal overload protection is a safety device in
the boiler. It prevents an uncontrolled increase in tem-
perature and pressure inside the boiler.
When the boiler temperature is >95°C, it opens a valve
and feeds cold water into the boiler water circuit to
reduce the boiler temperature.
Fit the thermal overload protection valve before
(as seen from the direction of flow) the heat ex-
changer (i.e. no water pressure building up in the
heat exchanger).
!
ATTENTION
- Only standard-tested thermal overload pro-
tection may be installed.
- The water supply line must be designed so
that it cannot be shut off and has a continu-
ous minimum pressure of 2 bar.
- The drain line must be routed freely into a
drain funnel.
- A backflow inhibitor and, as a pressure limit-
ing device, a safety valve or an expansion
tank with a minimum capacity of 4 litres must
be installed at the inlet connection.
On the left side of the boiler: Perforation in the clad-
ding for easy access when replacing the thermal
overload protection heat exchanger.
6.6 Return booster module (RFB)
- Function of the return flow boosting: The return
temperature in the boiler is kept > 55°C (this pre-
vents condensation of the flue gases in the heat
exchanger and resulting corrosion).
- The electrical connection of the return lift module is
made on the back of the boiler (plug-in connection
when using a SOLARFOCUS return booster mod-
ule).

Installation of a return booster module is a
condition for warranty.

During installation, make sure that there is a
clearance >20 cm between the boiler and the
return booster module (to allow for subsequent
replacement of pump components, if neces-
sary).
Return flow booster module with servomotor
Fig. 6-3
1 Boiler flow
2 Heating circuit or buffer tank flow
3 Bypass line
4 Boiler return
5 Return, heating circuit or buffer tank
6 Pump X15
7 Temperature sensor X32
8 Servomotor X13
9 Non-return valve
(not included in the scope of delivery)
1
2
3
4
5
6 8
7
9
Cold water
Drain
Heat exchanger
Temperature sensor