York OPTIVIEW - Refrigerant Level Control Screen

JOHNSON CONTROLS
31
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
FORM 160.78-O2
ISSUE DATE: 5/22/2017
2
OVERVIEW
This screen displays a cutaway view of the chiller con-
denser, along with the liquid refrigerant level sensor
and variable orifice. Setpoints relating to the liquid lev-
el control are maintained on this screen. Through ani-
mation, the variable orifice position is displayed. Also,
the refrigerant flow control valve (variable orifice) can
be manually operated.
A Variable Orifice is used to control the condenser re-
frigerant level to the Refrigerant Level Setpoint. The
control thresholds are applied in two different zones,
as determined by the error relationship between the
actual refrigerant level and the Level Setpoint. Zone
1 parameters are used when the error is less than or
equal to the programmed Zone transition delta. Zone 2
parameters are used when the error is greater than the
programmed Zone transition delta. When transitioning
from Zone 2 to Zone 1, the error must be less than or
equal to the programmed Zone transition delta for the
programmed Zone transition time (seconds) before the
Zone 1 parameters are used. If the error is greater than
the programmed Zone transition delta, the Zone 2 pa-
rameters are immediately implemented.
The following elds require login access
level of SERVICE. Service technicians re-
fer to YORK YMC
2
Service Manual (Form
160.78-M2) for operation instructions
and explanations of all programmable
setpoints, zone parameters and displayed
values.
DISPLAY ONLY
Refrigerant Level
Displays the present level of refrigerant in percent
over the length of the condenser refrigerant level sen-
sor. 0% is at or below the bottom of the sensor. 100% is
at or above the top of the sensor. The refrigerant level is
animated in the cutaway view of the condenser. When
the actual level is 0% to 15%, the level is shown about
50% full. When the actual level is 16% to 31%, the
level is shown about 60% full. When the actual level is
32% to 47%, the level is shown about 70% full. When
the actual level is 48% to 63%, the level is shown about
80% full. When the actual level is 64% to 79%, the
level is shown as about 90% full. Actual levels above
79% shown as 100% full.
REFRIGERANT LEVEL CONTROL SCREEN
LD14852b
FIGURE 10 - REFRIGERANT LEVEL CONTROL SCREEN