Balance Point; Cooling Cycle; Balance Point Chart - Carrier 50ZH Series Installation, Start-Up And Service Instructions Manual

80000
OUTDOOR COIL
Check Valves
A Ck)sed
B Open
C Ck)sed
D Open
LEGEND
LCS Loss of Charge Switch
] Acutrol Metering Device
r_ Check Valve (Arrow indicates direction of flow)
LCS
INDOOR COIL
=
COOLING CYCLE
1. Hot gas from compressor flows through the 4-way valve and is
directed to the heating liquid line check valve. It is then con-
densed and subcooled through converging circuits. Refrigerant leaves
the outdoor coil by way of the strainer and the check valve in the
cooling liquid line.
2. The refrigerant then feeds the indoor coil thR)ugh the Acutrol
metering device on each circuit.
3. Each circuit evaporates the refrigerant and the circuits are com-
bined in the indoor coil header with some of the circuits flowing
through the check valve.
4. The refrigerant then flows through the 4-way valve, accumulator,
and back to the compressor.
Fig. 26-Typical Heat Pump Operation, Cooling Mode
Balance Point Worksheet
C95044
k-
o_
eL)
S_
c
D
70000
60000
50000
40000
30000
20000
10000
-10 10 20 30 40
Outdoor Air Temp (Deg F)
Fig. 27-50ZH Balance Point Chart
21
5O 6O
C01038rev2