FORM 160.54-O1
ISSUE DATE: 9/10/2014
JOHNSON CONTROLS
52
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
Refrigerant Level Control Mode
Indicates whether the liquid level control is under man-
ual or automatic control.
Raise (LED)
ON when the digital output controlling the raise output
is ON. Otherwise, it is OFF.
Lower (LED)
ON when the digital output controlling the Lower out-
put is ON. Otherwise, it is OFF.
Zone Control State
Displays the zone control state (Zone 1, Zone 2, Or
Zone 2 To Zone 1) currently in effect for the Refriger-
ant Level control. Zone Control Off is displayed when
the chiller is shutdown.
Zone Time Remaining
Displays the time remaining in the 60 second count-
down timer when transitioning from Zone 2 to Zone 1.
When transitioning from Zone 2 parameter set to Zone
1 parameter set, the Zone 1 error requirement must be
met for 60 continuous seconds before Zone 1 param-
eters are used.
Refrigerant Level Target
After the chiller has been running for 3 minutes, if
the refrigerant level is less than the level setpoint, a
linearly increasing ramp (Refrigerant Level target)
is applied to the level setpoint. This ramp allows the
level to go from the present level to the programmed
level setpoint over a period of time programmed as the
Ramp Up Time.
Ramp Up Time Remaining
Displays the time remaining in the Ramp Up time
countdown timer while a Refrigerant Level target ramp
is in effect.
PROGRAMMABLE
Setpoint
Specifies the desired refrigerant level to be maintained
in the condenser.
Valve Preset Time
Specifies the duration of pre-positioning (close) pulse
during the System Prelube when starting the chiller.
Ramp Up Time
Specifies the duration of the ramp up time applied to
the Refrigerant Level Target when starting the chiller
while the actual refrigerant level is less than the level
setpoint after a 3 minute bypass at start.
Period (Zone 1)
Specifies the control period used during Zone 1 operation.
Rate (Zone 1)
Specifies the rate limit threshold used during Zone 1
operation.
Period (Zone 2)
Specifies the control period used in Zone 2 operation.
Rate (Zone 2)
Specifies the rate limit threshold used during Zone 2
operation.
[Refrigerant Level Control] Lower (Manual)
This key puts the Level Control into manual mode and
sends a LOWER (open) command to the variable ori-
fice.
[Refrigerant Level Control] Raise (Manual)
This key puts the Level Control into manual mode and
sends a RAISE (close) command to the variable ori-
fice.
[Refrigerant Level Control] Hold (Manual)
This key puts the Level Control into manual mode and
sends a HOLD command to the variable orifice.
[Refrigerant Level Control] Auto
Returns the Level Control to automatic mode.
NAVIGATION
Home
Access Level Required: VIEW
Returns user to HOME Screen.
Condenser
Access Level Required: VIEW
Returns user to CONDENSER Screen.
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