Airwell Aqu@Scop HT SPLIT 12-6, Инструкция по установке

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Only the outdoor unit is charged with refrigerant fluid. The indoor unit contains a small quantity of
a neutral gas. This the reason it is imperative to vacuum the linking pipes and the indoor unit and
always leave both the stop cocks on the outdoor modules in the closed position .
13.2. PIPE INSULATION (NOT SUPPLIED)
13.3. VACUUM OF COOLING PIPES AND INDOOR UNIT
You should use a set of pressure gauges or a manifold to carry out this operation.
1. Keep the Outdoor Unit ball valves closed.
2. Connect the end hoses to the ¼" take-off situated on the caged-ball valves (one hose on the liquid
circuit stop cock and one hose on the gas circuit stop cock). Connect the vacuum pump to the main
hose.
3. Open all the valves on the set of pressure gauges. Start the vacuum pump and check that the indicator
needle drops to – 0.2 mm Hg. Then leave the pump to run for at least 15 minutes.
4. Before removing the vacuum pump, you must check that the vacuum indicator remains stable for at
least five minutes.
5. Isolate the pump by closing the valves on the set of pressure gauges. Then stop the vacuum pump.
6. Open the 2 caged-ball valves.
7. In the case where one of the refrigeration links is 20m higher than the other, you must an additional
refrigerant fluid charge (Refer to the § REFRIGERANT CONNECTIONS , appendix VII).
8. To guarantee the tightness of the caged-ball valves, remember to refit the caps once the work is
completed.
9. Check tightness of the pipe links. Use an electronic leak detector or a soapy sponge.
In order to avoid heat exchange with the ambient air, we recommend you insulate the pipe links between the
Outdoor and Indoor units.
The temperature in the gas pipe can exceed 100°C, while the liquid pipe temperatures are close to water inlet
temperatures.
Therefore, it is very important to insulate these pipes with quality lagging compliant with EN ISO 8497 standards
(thermal conductivity

<0.040 W/m.K). Furthermore, all pipe links should be protected by lagging of adequate
thickness.
In practice, we recommend an insulation thickness of 9mm for the liquid pipe and 13mm for the gas pipe (thermal
conductivity

<0.040 W/m.K).
Example on the gas pipe:
² For a temperature difference between the fluid and the ambient air of 100K,
² with 13mm thick insulation (thermal conductivity

<0.040 W/m.K),
² the heat loss is 18.7 W/m.