FORM 160.72-O1 (810)
JOHNSON CONTROLS
30
REFRIGERANT LEVEL CONTROL SCREEN
Zone Transition Time Remaining
Displays the delay time between transitions from Zone-2
to Zone-1.
Pulldown Time Remaining
Displays the time remaining from start-up before the
liquid valve will modulate to maintain the refrigerant
level setpoint. This setpoint is set by the Johnson Con-
trol Service Technician at commissioning.
Level Control Valve Mode
Indicates whether the liquid level control is under man-
ual or automatic control.
PROGRAMMABLE
Requires access level of SERVICE.
Service Technicians refer to the Service
Instructions (Form 160.72-M1) for opera-
tion instructions and explanation of all
programmable setpoints and displayed
values.
[Level Control Valve] Raise (Manual)
Access Level Required: SERVICE
This key allows the Service Technician to open the
valve in increments of 1% or more from its current po-
sition.
[Level Control Valve] Lower (Manual)
Access Level Required: SERVICE
This key allows the Service Technician to close the
valve in increments of 1% or more from its current po-
sition.
[Level Control Valve] Set (Manual)
Access Level Required: SERVICE
This key allows the Service Technician to input a spe-
cific value from 0 to 100 % to position the valve.
[Level Control Valve] Switch to Manual
Access Level Required: SERVICE
This key toggles between Switch to Manual and Switch
to Auto to allow for control of the Level Control Valve.
The Level Control Valve Mode display will indicate
the control mode of the valve and prevent transfer of
the mode from manual to auto when the calculated auto
position and the manual position differ by more than
5%. This will be indicated by the SWITCH TO AUTO
button color changing from green to red
Operation
Access Level Required: SERVICE
The mode of operation of the Level Control Valve may
be set for PID control or fixed position.
NAVIGATION
Home
Access Level Required: VIEW
Returns user to Home Screen.
Condenser
Access Level Required: VIEW
Returns user to the Condenser Screen.
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