COSMOGAS ECOTWIN, Инструкция по установке, эксплуатации и обслуживанию

Страница: 30 / 88

30
COSMOGAS
Ecotwin
6.8.3 - Installation in cold and snowy
areas
Wind and snow can greatly affect the performance of the
heat pump. For a correct installation of the outdoor unit it is
essential to follow the information below:

The width of the base must not exceed the width of the
outdoor unit. Ice formation can cause it to rupture, resulting
in a coolant leakage.

The height of the base cover must be greater than the height
of the maximum snowfall. This measure helps to protect the
exchanger from snow and to prevent ice formation during
defrost function.

In areas characterized by heavy snowfall, raise the
protection by at least 200 mm above the average thickness
of the snowpack.
WARNING!!!
- If the outdoor temperatures drop below 0°C, take the
necessary measures to avoid the risk of freezing in the
condensate drain pipes.
- Avoid any risk of condensate freezing inside the
passages.
- Always install the outdoor unit as far as possible from
trafficable roads, as the discharged condensate can
freeze and cause a potential danger (ice sheet).
- Place the outdoor units side by side and not on top of
each other to prevent condensation from freezing on
the bottom unit (Figure 6-4).
6 - INSTALLATION
6.9 - Heating/Cooling supply and return
The indoor unit has 3 hydraulic connections in the lower part
(all diameter 1 “, see Figure 3-1):
- a “Water Inlet” connection which is the hydraulic return;
- a “Heating-cooling water outlet” connection which is supply
of heating and cooling service;
- a “Water outlet to DHW buffer tank” connection which is
the supply to the buffer tank set up for the production of
domestic hot water.
The unit can operate without an inertial buffer tank if the
amount of water circulating in the circuit is at least equal to 10
l / kW of unit power. For example, in the case of the Ecotwin
09 unit (heat output 10 kW) the amount of water circulating in
the system should be at least 10 l/kW = 100 liters.
If the machine is to perform only the heating and / or cooling
service without DHW production, the “Water outlet to DHW
buffer tank” connection must be closed with a blind plug
diam. 1 “.
In the upper part of the machine there are the refrigerant
connections to the outdoor unit, the diameter of which is
shown in Figure 3-1.
WARNING!!! The appliance is equipped with a
safety valve set at 3 bar. It must therefore not be installed
with a sash greater than 30 m.
The safety drain valve must be conveyed to an anti-odor
siphon. This drain must be designed to avoid overpressure, in
the event of opening the valves, and allow the user to check
for any intervention.
WARNING !!! If the safety valve is not connected
to the drain, it could cause damage to people, animals
or things.
WARNING!!! COSMOGAS is not liable for any
damage caused by the incorrect use of additives in the
heating / cooling system.
WARNING!!! The system downstream of the
appliance must be made with materials that withstand
temperatures up to 95 ° C and a pressure of 3 bar.
Otherwise (e.g. pipes in plastic materials), the system
must be equipped with the appropriate protection and
safety devices.
Before connecting the heating pipes, carefully wash the
system to remove any waste (hemp, radiator melt earth, etc.)
that could damage the appliance. This washing must also be
carried out when replacing an appliance.
Figure 3-1 shows the positioning of the supply and return
pipes.

Install a metal mesh filter on the return pipe to protect the
appliance from any residues coming from the system.

Do not use the appliance for introducing any type of additive
into the system.

A continuous supply of water to the heating circuit increases
the oxygen and limescale content with the risk of corrosion
of the hydraulic circuit and consequent reduction of the life
of the appliance itself. Any leaks from the hydraulic circuit
must be repaired to prevent the problem.