Bedienungsanleitung Toshiba MCY-MAP0401HT (Seite 21 von 81) (Deutsch, Englisch)

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Addition of refrigerant

After vacuuming work, exchange the vacuum pump with the refrigerant bomb and then start the additional charging

work of refrigerant.

Calculating the amount of additional refrigerant required

When the system is charged with refrigerant at the factory, the amount of refrigerant needed for the pipes on site is

not included. Calculate the additional amount required, and add that amount to the system.

Additional refrigerant charge amount is calculated from size of liquid pipe at site and its real length.

Additional

refrigerant charge

R (kg)

amount at site

Real length

of liquid pipe

=× +

Additional refrigerant charge

amount per liquid pipe 1m

(Table 1)

Compensation

by outdoor HP

(Table 2)

Example : (0501 type)

Note)

If the additional refrigerant amount indicates a negative result from the calculation, use air conditioner without

the adding of any additional refrigerant.

Charging of refrigerant

• Keeping valve of the outdoor unit closed, be sure to charge the liquid refrigerant into service port at liquid side.

• If the specified amount of refrigerant cannot be charged, open fully valves of outdoor unit at liquid and discharge/

suction gas sides, operate the air conditioner in COOL mode under condition that valve at suction gas side is a

little returned to close side, and then charge refrigerant into service port at suction gas side. In this time, choke the

refrigerant slightly by operating valve of the bomb to charge liquid refrigerant. The liquid refrigerant may be

charged suddenly, therefore be sure to charge refrigerant gradually.

• When refrigerant leaks and refrigerant shortage occurs in the system, recover the refrigerant in the system and

recharge refrigerant newly up to the correct level.

REQUIREMENT

Entry of refrigerant charge amount

• Complete the refrigerant record column found on the wiring diagram, with detail of the additional refrigerant

amount and name of service engineer at the time of installation.

• The total amount of refrigerant refers to the shipment charge plus any additional refrigerant at the time of

installation. The refrigerant amount at shipment is indicated on the unit name plate.

Lx : Real total length of liquid pipe Ø6.4 (m)

Ly : Real total length of liquid pipe Ø9.5 (m)

L1 Ø9.5 : 10m L2 Ø9.5 : 10m L3 Ø9.5 : 5m a Ø9.5 : 3m

b Ø6.4 : 3m c Ø6.4 : 4m d Ø6.4 : 5m

Additional charge amount R (kg)

= (Lx × 0.025kg/m) + (Ly × 0.055kg/m) + (–0.4kg)

= (12 × 0.025kg) + (28 × 0.055kg) + (–0.4kg)

= 1.44kg

bcd

Table 1

Table 2

0401 type 0501 type 0601 type

–0.8 –0.4 0

Pipe dia. at liquid side

Additional refrigerant amount/1m

(kg)

Outdoor unit capacity type

Compensation by outdoor HP

(kg)

Ø6.4 Ø9.5

0.025 0.055

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