Minimum Speed: This setting determines the lowest speed that the variable
compressor can run. Range of adjustment is 900 to 1500RPM with a default of
1500RPM.
Maximum Speed: This setting determines the highest speed that the variable
compressor can run. Range of adjustment is 5000 to 6000RPM with a default of
6000RPM.
V
a
r
i
a
b
l
e
C
o
m
p
r
e
ss
o
r
2
D
e
l
a
y
M
odu
l
a
t
i
on
:
60
s
C2
O
ffs
e
t:
5
.
0
•
C1
B
oo
s
t
T
i
m
e
:
60
s
C2
On
D
e
l
a
y
:
60
s
C2
O
ff
D
e
l
a
y
:
60
s
O
il
B
oo
s
t
D
e
l
a
y
:
90
s
E
x
e
r
c
i
s
e
T
i
m
e
:
100
s
Note: This screen is only displayed when the compressor selection is set for
Variable & Fixed or Dual Variable.
Delay Modulation: The time that the variable compressor (C1) will run at
minimum speed before modulating when C2 starts. Or the time C1 will run at
maximum speed before modulating when C2 is stopped. Range of adjustment is 0
to 999 with a default of 60s.
C2 Offset: This is the amount that the temperature must drop below Setpoint
before C2 is turned off. Range of adjustment is 0 to 9.9°F with a default of 1.0°F.
C1 Boost Time: When C2 turns off, C1 modulation is limited to be no lower than
75% to make up for the loss of cooling for this amount of time before resuming
normal modulation. Range of adjustment is 0 to 300s with a default of 60s.
C2 On Delay: Is the time delay between when C1 starts before C2 can start.
Range of adjustment is 0 to 999s with a default of 60s.
C2 Off Delay: This is the time delay before C2 can turn off once temperature is
satisfied. Range of adjustment is 0 to 999s with a default of 60s.
Oil Boost Delay: Periodically, the VFD will increase the compressor speed to
maintain oil flow for a brief period. Consequently, the temperature may drop below
the compressor off threshold. During an oil boost cycle, the threshold is offset to
keep the compressor running. This delay extends the time of the offset once the oil
boost cycle ends. Notice of the oil boost cycle is indicated on the main status
screen. Range of adjustment is 0 to 600s with a default of 90s.
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