Condenser Refrigerant Level Control Screen; Figure 31 - Condenser Refrigerant Level Control Screen; Table 4 - Condenser Refrigerant Level - York YK-EP B Operation & Maintenance Manual

FORM 160.87-OM1
ISSUE DATE: 8/24/2018

CONDENSER REFRIGERANT LEVEL CONTROL SCREEN

FIGURE 31 - CONDENSER REFRIGERANT LEVEL CONTROL SCREEN

OVERVIEW
This screen shows the data and settings related to the
Condenser Refrigerant Level Control.
DISPLAY
Subcooler Effectiveness
The Subcooler Effectiveness is evaluated with the fol-
lowing calculation and compared to a high and low
limit. (Cond Sat Temp-Drop Leg Ref Temp)/(Cond Sat
Temp-Entering Cond Liq Temp). This value is typi-
cally around 0.8 at design conditions.
Condenser Refrigerant Level
Displays the present position of the liquid level. The
refrigerant level is animated in the cutaway view of
the condenser. The actual level of the refrigerant in the
tank does not match the percentage displayed in the
Level Control Valve Command box. The actual levels
versus the displayed percentages are as follows:
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION

TABLE 4 - CONDENSER REFRIGERANT LEVEL

ACTUAL LEVEL CONTROL VALVE COMMAND %
0% to 15%
16% to 31%
32% to 47%
48% to 63%
64% to 79%
79%
Active Level Setpoint
Access Level Required: SERVICE
Displays the setpoint to which the refrigerant level is
being controlled. (Adjustable 20 to 80%; default 50%).
Level Control State
Indicates one of the following states the level control
routine is in: Manual, Inactive, Startup Hold, Setpoint
Ramp, PID Control or Hold.
Level Control Valve Command
Indicates the valve command as a percentage of full
open.
LD19646
50%
60%
70%
80%
90%
100%
77
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