McQuay AGZ 010BS - Hot Gas Bypass Piping; Hot Gas Bypass Adjustment

64 AGZ 010B through 034B IOMM AGZB1
! WARNING
The hot gas line may become hot enough to cause injury in a very short time. Avoid
contact during valve checkout.
On installations where the condensing unit is remote from the evaporator, it is
recommended that the hot gas bypass valve be mounted near the condensing unit to
minimize the amount of refrigerant that will condense in the hot gas line during periods
when hot gas bypass is not required.
Figure 18, Hot Gas Bypass Piping
Discharge
Line
Hot Gas
Bypass Valve
Hot Gas Bypass
Solenoid Valve
Suction Line
Adjustable
Remote Bulb
External Equalizer
Connection to Suction
Side of Evaporator
To Evaporator Inlet
After Expansion Valve
Figure 19, Hot Gas Bypass Adjustment
80
70
60
50
40
30
30 40 50 60 70
80
90
100
110
M
I
N
I
M
U
M
M
A
X
I
M
U
M
F
A
C
T
O
R
Y
S
E
T
T
I
N
G
VALVE OPENIN
G
P
R
E
S
S
U
R
E
(
P
S
I
G
)
REMOTE BULB ADJUSTMENT RANGE
TEMP (°F) AT BULB LOCATION
ADJUSTMENT
RANGE
MODEL AGZ 029 – 034, Post 2004 Production
Model AGZ 029 and 034 built after January 2004 may have a hot gas bypass valve as
shown as shown in Figure 20.