Refrigeration Cycle Diagram - Carrier 42NQ012N Service Manual

Cooling
0.39m
Heating
(Connecting pipe)
∅12.7
O.D.:12.7mm P
Packed valve
(∅12.7)
Heating
Cooling
4-way valve
Heating Cooling Compressor
Cooling
Heating
50Hz
Standard
Heating Overload*1
Low temperature
Standard
Cooling Overload
Low temperature
Note :
•
Measure the heat exchanger temperature at the center of U-bend. (By means of TC sensor)
•
*1 During heating overload operation, a value for the high temperature limit control operation is included.

5. REFRIGERATION CYCLE DIAGRAM

Indoor unit
Heat exchanger
Cross flow fan
PA145G1C-4FT1
Accumulator
Heat exchanger
Propeller fan
Outdoor unit
Standar d
pressure P exchang er inter changing
(MPaG)
2.72
3.70
2.51
0.91
1.26
0.77
T1
Capillary tube
∅1.5x1500l
Refrigerant
R410A : 1.05 kg.
Mark( )means check points of Gas Leak.
Surface temp. of heat
pipe T1 (°C)
46.9
59.9
37.2
9.5
14.6
1.5
− −
9
FILE NO. SVM-10031
0.49m
(Connecting pipe)
∅6.35
O.D.:6.35mm
Packed valve
(∅6.35)
Capillary tube
∅1.2x500l
Ambient temp.
conditions DB/WB
Fan speed
(°C)
(indoor)
Indoor Outdoor
High 20/15
27/−
Low
−10/−10
High 20/−
High 27/19
High 32/23
Low 21/15
7/6
24/18
35/24
43/26
21/15