Vertiv Liebert MCM080 - Page 117

Sub-
menu
ID
Meaning
Default R407c Default R410a
Default R407C
W/LT
Default R410a
W/LT
Comments
Metric Imperial Metric Imperial Metric Imperial Metric Imperial
C19
Refrigerant
temperature min 1
25°C 77.0°F 25°C 77.0°F 25°C 77.0°F 25°C 77.0°F
Range 20 - 30°C,
68 - 86°F
C20
Refrigerant
temperature min 2
25°C 77.0°F 25°C 77.0°F 25°C 77.0°F 25°C 77.0°F
C21
Refrigerant
temperature PID
Kp
0.36 0.36 0.36 0.36
Do not change
unless properly
instructed.
C22
Refrigerant
temperature PID
Kip
162.00 162.00 162.00 162.00
C23
Refrigerant
temperature PID
Kdp
1.00 1.00 1.00 1.00
C24
System control
state
1 1 1 1
"0" = Manual, "1" =
Auto
C25
Condenser
pressure setting
point 1
14.0 bar 203 psi 20.0 bar 290 psi 16.0 bar 232 psi 22.0 bar 319 psi
R407c - 12-18 bar;
174-261 psi
C26
Condenser
pressure setting
point 2
14.0 bar 203 psi 20.0 bar 290 psi 16.0 bar 232 psi 22.0 bar 319 psi
R410a - 18-26 bar;
261-376 psi
C27 Lee Temp Option 0 0 0 0
"0" - No Lee Temp
installed,
"1" - Lee Temp
installed
C28
Minimum Speed
with LeeTemp
10% 10% 10% 10% Range 8 - 20%
C32
Refrigerant temp.
set point 1
1.67°C 35°F 1.67°C 35°F 1.67°C 35°F 1.67°C 35°F
Range -40 -
+40°C;
-39.9 - +104°F
C33
Refrigerant temp.
set point 2
1.67°C 35°F 1.67°C 35°F 1.67°C 35°F 1.67°C 35°F
C34
EC Fan1 request
speed
0% 0% 0% 0%
Manually sets fan
speed (RPM) when
C24 is set to "0".
C35
EC Fan2 request
speed
0% 0% 0% 0%
C36
EC Fan3 request
speed
0% 0% 0% 0%
C37
EC Fan4 request
speed
0% 0% 0% 0%
C38
EC Fan Reverse
Request
0 0 0 "0" = Off, "1" - On
C39
EC Fan startup
speed offset for
pressure mode
0 0 0 0
Offset to the
startup speed of
the EC Fan in range
-10%to10%
C50-C58 Internal system use only!
C90
Prefered display
units.
1 1 1 1
"0" = Metric (bar,
°C)
"1" = Imperial(psi,
°F)
C91 Save configuration to USB flash drive. Pressing ENT will execute the function immediately.
Table 11.2 Premium Efficiency Control Board Configuration-parameter List (continued)
Vertiv | Liebert® MC™ Installer/User Guide | 117