M&M
R
EFRIGERATION
I
NC
. 3-55
Chapter 3: Operational Procedures
The following table lists the data entry fields and a description of their purposes.
Economizer Control Status Definitions
Variable VI Setpoints (Option)
The Variable Vi Control screen provides Setpoints for Vi Control.
Variable Vi Control Screen
The following table lists the data entry fields and a description of their purposes.
Variable Vi Control Definitions
PARAMETER DEFINITION RANGE
CONTROL
MODE
Selects the operational mode for the Economizer.
AUTO
MAN ON
MAN OFF
SEQ
CUT-IN
SETPOINT
When the Economizer is in Automatic mode, the Economizer
Solenoid output will be energized when the Slide Valve Position is
above this setpoint.
0 - 100 PCT
CUT-OUT
SETPOINT
When the Economizer is in Automatic mode, the Economizer
Solenoid output will be de-energized when the Slide Valve Posi-
tion falls below this setpoint.
0 - 100 PCT
M & M REFRIGERATION 8:32
AM
1. START VARIABLE VI CONTROL
2. STATS
3. MODE UPDATE TIME XXX.X
MIN
4. SETPT
5. SCHED
6. CNTRL
7. MISC
8. LOGS
9. MENUS
PARAMETER FUNCTION RANGE
UPDATE
TIME
The time between Vi adjustments.
1 - 200
MIN