Exercise Disabled (feature not used – default setting) When changed to Exercise
Time: When C1 has been running and C2 been idle, the fixed speed compressor
will be run for the exercise time setting. Range of adjustment is 12hrs to 999hrs
with a default of 100hrs.
V
a
r
i
a
b
l
e
C
o
m
p
r
e
ss
o
r
3
E
n
a
b
l
e
P
u
m
p
-
D
o
w
n
:
Y
e
s
S
u
c
t
i
on
P
r
e
ss
u
r
e
:
76
.
3p
s
i
C
u
t
O
u
t
SP
:
85
.
0p
s
i
D
i
ff
e
r
e
n
t
i
a
l
:
30
.
0p
s
i
M
a
x
i
m
u
m
PD T
i
m
e
:
60
s
SH PD
C
u
t
-I
n
:
30
•
Note: The Variable Compressor screen is only displayed when the compressor
selection is set for a variable compressor.
Enable Pump-Down: The pump-down feature prevents refrigerant from migrating
back to the compressor. Starting a compressor with a large amount of refrigerant
dilutes the compressor lubrication, resulting in damage to the compressor.
Suction Pressure: The current suction pressure (for reference only).
Cut Out SP: The suction pressure must drop below this setting to end the pump
down cycle. Range of adjustment is 80.0 to 120psi with a default of 90.0psi.
Differential: Should the suction pressure rise above the Cut Out SP + this setting;
the compressor will be started to pump back down a second time. Range of
adjustment is 10.0 to 40.0psi with a default of 30.0psi.
Maximum PD Time: The pump down cycle will be ended and an alarm will occur
if the suction pressure does not drop below the PD Cut Out setting within this time.
Range of adjustment is 30 to 120 seconds with a default of 60 seconds.
SH PD Cut-In: The threshold that Super Heat must rise to for a third cycle of
pump-down. Range is 20 to 50 degrees with a default of 30 degrees.
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