HTW PURE LIGHT UV Manual De Instalación página 35

2. Pumping type
Make sure that all the tubes of indoor and outdoor unit are connecting well.
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Take off valve bonnet from two-way and three-way valves by spanner; connect vacuum
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pump and compound valve to the service valve bonnet.
Open the low-pressure switch of compound valve, and run vacuum pump until units'
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internal pressure at 10 mmHg.
After pump vacuum, close the low-pressure switch of compound valve, and then close
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vacuum pump. Turn anti-clockwise 90 Spool of narrow pipe service valve by hexagon
spanner, tightly with clockwise turning after stopping for 10 seconds.
Check with soap water or leak detector whether there is leakage at all connections of
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indoor and outdoor unit.
Open wide and narrow pipe service valves by hexagon spanner for running.
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Take off the connection pipeline of wide pipe service valve.
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Screw tightly the entire valve bonnet by torque spanner.
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Check with soap water or leak detector whether there are leakage at all indoor and
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outdoors' connections.
Put the valve bonnet and lid back to position.
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Narrow tube
Fig.16
Service valve
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Use R32 refrigerant special vacuum pump
33
Wide tube
Open
Fig.17
Fig.17