EN
EN - 15
System frost protection (at the installer's expense)
CIRCUITS
Indoor circuit: Parameter P5 is used to add glycol to the indoor
circuit. A glycol/water solution is not necessary in certain areas,
if you are absolutely sure
that your indoor circuit will always
remain at above-freezing temperature. If in doubt, use 40%
MPG (monopropylene glycol).
Outdoor circuit:
- The loop between the intermediate exchanger and the heat
pump must contain a 20% MPG solution.
- Parameter P06 must be set to NO if the indoor circuit does
not contain a glycol solution or 40% MPG if the outdoor circuit
contains a 40% glycol solution.
FROST PROTECTION
We highly recommend that you drain sections not protected by
glycol/water solution (well loop and, if need be, the indoor circuit)
if you turn off the heating system intentionally or if there is a risk
of it being accidentally turned off.
Sections that must be protected by glycol/water solution
should contain the following proportions of
MPG
(other
antifreeze with the same freezing point may also be used):
20% MPG: freezing point = -8°C
40% MPG: freezing point = -25°C
The antifreeze may be mixed with a corrosion inhibitor and
even a biocide (follow the instructions of the anti-freeze
manufacturer). Ready-mixed solutions and dilutable products
may also be used.
PROCEDURE
Preparing the system to be protected:
Always flush the system completely and blow it out to
remove any remaining water.
Washing the system with a suitable cleaner is
recommended
(use a cleaner compatible with the system's
materials).
Follow up the final rinse with a complete drain of the system.
Add the water/antifreeze/corrosion inhibitor mixture and
pressurise using the hydraulic pump.
If you use a concentrated dilutable solution, follow the
instructions below:
- Always dilute the antifreeze with water before adding it to
the system. Never add them separately.
- Always mix the correct amounts of water, antifreeze and
corrosion inhibitor in a container before adding them to the
system.
- Drain the system thoroughly.
- Allow the mixture to run through the entire system for at least
2 hours before starting the heat pump.
-Use a hydrometer or a refractometer to check the final
proportion obtained.
-
Using litmus paper or a pH meter, check the pH obtained.
Affix, in a visible location, a label stating:
- that the system contains antifreeze.
- the name of the product and its supplier.
-the proportion and the pH at commissioning.
Do not use products made with monoethylene glycol (which is toxic)
2.3 Electrical connections
- Remove the unit's front panels to access the electrics box
(see instructions in paragraph 1.2.2 Removing the shipment protection).
Connect to terminal blocks J1, J2, J3, J4 and J5 according to the HomeConnect board' supply mode (single-phase or three-
phase) (see paragraph 2.3.3). For a three-phase power supply, use terminals N(J4), L1(J3) and the green/yellow terminal (J5).
Make sure the terminals are securely tightened.
- Select the supply cable using the table below.
The electrical characteristics of the mains supply must be identical to those on the name plate. The power supply must meet the
following requirements:
230 V
50 Hz for 20H/33H/45H single-phase + N Earth models.
and 400 V
50 Hz for the 45HT three-phase + N Earth model.
+ 6 %
- 10%
+ 6 %
- 10%
IMPORTANT
:
- Connect the unit to earth before making any other electrical connections.
- The three-phase model must have a neutral.
- The system must be fitted with a main cut-off switch
It is your responsibility to protect the unit from mains voltage spikes and voltage spikes caused by lightning. Depending
on the geographic location and the type of mains network (buried or overhead), you may have to install a lightning rod.
Check your local electrical codes and regulations.
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