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The length of the collector hose varies depending on
the rock /ground conditions and on the distribution
system.
When installing the collector hose ensure it rises con-
stantly towards the heat pump to avoid air pockets. If
this is not possible, install high points to vent the air.
The distribution system should be fitted with two pres-
sure expansionvessels. The heat transfer fluid side
should be pressurised to at least 0.5 bar.
All the system’s pipes are to be condensation insulated
except the pipes to the hot water heater.
If the temperature of the heat transfer system can fall
below 0 °C this must be protected against freezing
through the mixture of propylene glycol (NOTE! Not
ethanol). The mixing ratio should be approximately 25
% propylene glycol and the remainder water. As a
guideline for the volume calculation, use 1 litre of ready
mixed heat transfer fluid per metre of collector hose,
(for 40 x 2.4 PN 6.3 PEM hose).
The installation should be marked with the antifreeze
used.
Shut-off valves should be installed as close to the heat
pump as possible. Fit a particle filter to the incoming
pipe.
When connecting to an open ground water system,
due to the dirt and risk for freezing in the evaporator,
an intermediate frost protection circuit must be
installed. This requires an additional heat exchanger.
Pipe connections
16
Pipe installation must be carried out in accordance
with current norms and directives. FIGHTER 1310
HPAC can only work up to a return temperature of
around 50°C and a flow temperature from the heat
pump of around 60°C. FIGHTER 1310 HPAC is not
equipped with shut-off valves so you have to install
them yourself outside the heat pump to facilitate future
service.
The fluid in the building’s distribution system is the
same as in the ground/rock collector.
FIGHTER 1310 HPAC
For the Installer
General
FIGHTER 1310 is connected to the HPAC and possi-
ble hot water heating
Pipe connections are made at the rear of the FIGHT-
ER 1310. Pipe connections are made at the bottom
and top of HPAC. The necessary safety equipment,
shutoff valves (fitted as close as possible to the heat
pump), and the particle filter and flexible hoses sup-
plied must be fitted.
When connecting to a system with thermostats on all
convectors, a relief valve must be fitted, or a number
of the thermostats must be removed to ensure suffi-
cient flow.
Pipe connection, the building’s
distribution system
Pipe connection, collector side
Condensation insulation
To avoid condensation, all pipes and other cold sur-
faces must be isolated with diffusion-proofed material.
Where the cooling demand is high, fan coil units with a
drip dish and drain connection are needed.
PLEASE NOTE!
This system solution means that the
heat transfer fluid will also circulate
through the heating system. Check
that all component parts are designed
for the heat transfer fluid in question.