Carrier R-410A Installationsanweisung Seite 5

6 - LEAK CHECK
• Replace caps and check for leaks.
• Once all connections have been completed, check for
leaks by using a leak detector specific for HFC
refrigerants.
• After the leak check, fully open the two and three-
way valves.
CAUTION: Do not force the valve open beyond the limit
switch limits.
7 - PIPING INSULATION
1 Pipe
2 Pipe insulation
3 Fastening tape
Wrap the valves and pipes with anti-condensate insulation.
Tighten with tape, without exerting too much pressure on
the insulation.
Repair and cover any possible cracks in the insulation.
Fix the pipes to the wall with hooks or conduits.
8 - START UP :
CAUTION : Open both service valves before unit is
powered on, otherwise there might be the burst if
operating.
9 - REFRIGERANT CHARGE CHECK
This check becomes necessary after any refrigerant leak
due to incorrect connection, or after replacement of the
compressor. The best method to correctly charge
refrigerant is to completely empty the refrigerant circuit
using refrigerant recovery equipment.
Then charge the exact quantity of refrigerant according to
the data shown on the unit nameplate and always
considering the additional charges listed on the charge
sheet.
R-410A systems must be charged with liquid refrigerant.
Use the special recharging equipment (normally on the
market) to control the refrigerant correctly.
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10 - PUMP DOWN
Pump-down is an operation intended to collect all the
system refrigerant in the outdoor unit.
This operation must be carried out before disconnecting
the refrigerant tubing in order to avoid refrigerant loss to
the atmosphere, if it becomes necessary to disconnect the
refrigerant connections for unit repair, removal or
disposal; in this case, after removal, unit must be delivered
to an appropriate disposal centre or the original dealer.
1. Shut off the liquid valve with the Allen wrench.
2. Turn the system on in cooling with fan operating at
high velocity. (Compressor will immediately start,
provided 3 minutes have elapsed since the last stop).
3. After 2 minutes of operation, shut the suction valve
with the same wrench.
4. Turn the system off and switch mains supply off.
5. Disconnect tubing.
After disconnection, protect valves and tubing ends
from 5. dust.
11 - TOOLS
Tools exclusively for R-410A
Flare tool
Torque wrench
Gauge manifold
Charge hose
Vacuum pump adapter
Electronic balance for refrigerant charging
Refrigerant cylinder
Leakage detector
Charging cylinder
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