Refrigerant Level Control Screen; Figure 9 - Refrigerant Level Control Screen - York YR Manual

Optiview Control Center
SECTION 2 - OPTIVIEW™ CONTROL CENTER

REFRIGERANT LEVEL CONTROL SCREEN

FIGURE 9 - REFRIGERANT LEVEL CONTROL SCREEN

Overview
This screen displays a cutaway view of the chiller con-
denser, along with the liquid refrigerant level sensor
and the flow control valve. All setpoints relating to
the liquid level control are maintained on this screen.
Through animation, the Variable Orifice position is
displayed. In addition, the refrigerant flow control
valve (Variable Orifice) can be manually operated.
Display Only
Refrigerant Level Position
Displays the present position of the liquid level.
Refrigerant Level Control Mode
Indicates whether the liquid level control is under
manual or automatic control.
Raise (LED)
Is ON when the digital output controlling the Level
Raise contact is ON.
Lower (LED)
Is ON when the digital output controlling the Level
Lower contact is ON.
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Programmable
Setpoint
The level control will control the condenser refriger-
ant level to this level. Programmable over the range of
20% to 80% (default 30%). Service Technicians refer
to OptiView Control Center Service Instructions (Form
160.81-M1).
Valve Preset Time
Access Level Required: SERVICE
Sets the duration of time the refrigerant level control
valve is driven closed when a start is initiated. This pre-
sets the valve to a position held during the first 3 min-
utes of chiller run. Defines the duration of the "Start
Sequence Initiated" period. Programmable over the
range of 30 to 300 seconds (default 50 seconds). Service
Technicians refer to OptiView Control Center Service
Instructions (Form 160.81-M1).
Ramp-up Time
(Software version C.OPT.05.09.303 and later)
Access Level Required: SERVICE
Sets the duration of the ramp that is applied to the Lev-
el Control setpoint after the first 3 minutes of chiller
run when the actual level is greater than or less than
the setpoint. Programmable over the range of 3 to 15
minutes (default 8). Service Technicians refer to Op-
tiView Control Center Service Instructions (Form
160.81-M1).
FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020
LD14791
JOHNSON CONTROLS