Hot Gas Bypass Screen; Figure 11 - Hot Gas Bypass Screen - York YR Manual

FORM 160.81-O1 (1020)
ISSUE DATE 10/05/2020

FIGURE 11 - HOT GAS BYPASS SCREEN

This screen, accessed from the COMPRESSOR
screen, displays a pictorial of the bypass line and so-
lenoid valve location on the chiller. The Hot Gas ON
and OFF setpoints are programmed on this screen and
system parameters pertinent to Hot Gas Bypass opera-
tion are displayed. An LED illuminates when the Hot
Gas Solenoid is ON. If the chiller is equipped with the
Hot Gas Bypass option, operation must be enabled on
the OPERATIONS screen.
Display Only
Return Chilled Liquid Temperature
Displays the temperature of the liquid as it enters the
evaporator.
Leaving Chilled Liquid Temperature
Displays the temperature of the liquid as it leaves the
evaporator.
Hot Gas Solenoid (LED)
Indicates whether the solenoid is presently energized.
Programmable
On Setpoint
Access Level Required: SERVICE
The Hot Gas Bypass solenoid valve is turned ON when
the Return Chilled Liquid Temperature decreases to
JOHNSON CONTROLS

HOT GAS BYPASS SCREEN

less than or equal to the number of degrees of this ON
setpoint above the Leaving Chilled Liquid Tempera-
ture setpoint. The ON setpoint is programmed over
the range of 1.0ºF to 10.0ºF (default 1.0ºF). Refer to
OptiView Control Center Service Instructions (Form
160.81-M1 for an explanation of this setpoint.
Off Setpoint
Access Level Required: SERVICE
The Hot Gas Bypass solenoid valve is turned OFF
when the Return Chilled Liquid Temperature increases
above the Leaving Chilled Liquid Temperature setpoint
by greater than or equal to the number of degrees of
this OFF setpoint. The OFF setpoint is programmed
over the range of 2.0 to 15.0º F (default 2.0). Refer to
OptiView Control Center Service Instructions (Form
160.81-M1 for an explanation of this setpoint.
Navigation
Home
Access Level Required: SERVICE
Causes an instant return to the HOME screen.
Compressor
Access Level Required: SERVICE
Return to the COMPRESSOR screen.
SECTION 2 - OPTIVIEW™ CONTROL CENTER
LD09718
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