Midea MCA-24HRN2MCA-24CRN2 Installation Manual page 14

Necessary Refrigerant Stow Capacity
LENGTH(L)
Less than 8m (one-way)
Added Refrigerant When Over 8m(one-way)
Please record and reserve well the refrigerant stow capacity of your air conditioner for later maintenance.
Expel the air with a vacuum pump
( Refer to Chart 25)
(please refer to its manual for the way of using manifold value)
1. Loosen and remove the maintenance nuts of stop values A and B, and connect the charge hose of
the manifold value with the maintenance terminator of stop value A. (Be sure that stop values A and
B are both closed)
2. Connect the joint of the charge hose with the vacuum pump.
3. Open the Lo-lever of the manifold value completely.
4. Turn on the vacuum pump. At the beginning of pumping, loosen the maintenance terminator nut of
stop value B a little to check whether the air comes in (the sound of the pump changes, and the
indicator of compound meter turns below zero). Then fasten the nut.
5. When the pumping has finished, close the Lo-lever of the manifold value completely and turn off the
vacuum pump.
When you have pumped for over 15 minutes, please confirm that the indicator of multi-meter is on
-5
1.0 10 Pa(-76cmHg).
6. Loosen and remove the quadrangle cover of stop values A and B to open stop value A and B com-
pletely, then fasten them.
Capacity
MCA-24CRN2
MCA-24HRN2
Table 3
12
MCA-42(36,48)CRN2
MCA-42(36,48)HRN2
0.065 (L-8)