Johnson Controls YORK YK MaxE, Operation Manual

Page: 41 / 184

FORM 160.54-O1
41
JOHNSON CONTROLS
Refrigerant Level Control Mode
Indicates whether the liquid level control is under
manual 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 output
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 parameters
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 count-
down 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 Pre-lube 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 opera -
tion.
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 orifice.
[Refrigerant Level Control] Raise (Manual)
This key puts the Level Control into manual mode and
sends a raise (close) command to the variable orifice.
[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
Causes an instant return to the Home Screen
Condenser
Access Level Required
: VIEW
Returns to the Condenser Screen
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