Johnson Controls LSWU035 User Manual

JOHNSON CONTROLS
124
FORM 145.05-NOM7
ISSUE DATE: 10/31/2019
SECTION 5 – SEQUENCE OF OPERATION
Waterside Economizer Becomes Active
To activate the WATERSIDE ECONOMIZER, the
WATER TEMP ENTERING temperature must be
lower than the MIXED AIR TEMP plus WATER
ECONO DELTA. This temperature setting is shown
in the SETPOINT key, ECONOMIZER subsection. To
become inactive, the WATER TEMP ENTERING tem-
perature is greater than the MIXED AIR TEMP plus
WATER ECONO DELTA temperature.
The following parameters must be programmed into
the Unit Controller through the User Interface:
• OPTIONS key, CONDENSER subsection:
• “COND VALVES INSTALLED” should be
set to COND ONLY
• “CONDENSER TYPE” should be set to WA-
TER COOLED
• OPTIONS key, ECONOMIZER subsection:
• “ECONO INSTALLED” should be set to
WATERSIDE
• “ECONO METHOD TO USE” should be set
to WATERSIDE
• PROGRAM key, CONDENSER subsection:
• “COND WATER CONTROL” should be set
to ENABLED
• “ECONOMIZER CONTROL” should be set
to ENABLED
• SETPOINTS key, CONDENSER subsection:
• “COND VALVE MIN POS” (default is 30%)
• “DISCHARGE PRESSURE SP MIN”
(default is 225 PSIG)
• “DISCHARGE PRESSURE SP MAX”
(default is 400 PSIG)
• SETPOINTS key, ECONOMIZER subsection:
• “WATER ECONO MIN POS” (default is
30%)
• “WATER ECONO DELTA” (default is
50.0°F)
LD21636
FIGURE 78 - WATERSIDE ECONOMIZER ACTIONS

Johnson Controls LSWU035 Specifications

General

Brand	Johnson Controls
Model	LSWU035
Category	Chiller
Language	English