Specifications
Table Of Contents
- Form 150.72-NM1 (908)
- GENERAL SAFETY GUIDELINES
- CHANGEABILITY OF THIS DOCUMENT
- TABLE OF CONTENTS
- LIST OF FIGURES
- LIST OF TABLES
- SECTION 1 – GENERAL CHILLER INFORMATION & SAFETY
- SECTION 2 – PRODUCT DESCRIPTION
- INTRODUCTION
- GENERAL SYSTEM DESCRIPTION
- HIGH AMBIENT KIT
- BUILDING AUTOMATION SYSTEM INTERFACE
- MILLENIUM CONTROL CENTER
- POWER PANEL
- ACCESSORIES AND OPTIONS
- UNIT COMPONENTS
- CONTROL / POWER PANEL COMPONENTS
- PRODUCT IDENTIFICATION NUMBER (PIN)
- BASIC UNIT NOMENCLATURE
- REFRIGERANT FLOW DIAGRAM
- PROCESS AND INSTRUMENTATION DIAGRAM
- SECTION 3 – HANDLING AND STORAGE
- SECTION 4 – INSTALLATION
- INSTALLATION CHECKLIST
- HANDLING
- INSPECTION
- LOCATION AND CLEARANCES
- SPRING ISOLATORS (OPTIONAL)
- COMPRESSOR MOUNTING
- REMOTE COOLER OPTION
- CHILLED LIQUID PIPING
- PIPEWORK ARRANGEMENT
- DUCT WORK CONNECTION
- WIRING
- COMPRESSOR HEATERS
- RELIEF VALVES
- HIGH PRESSURE CUTOUT
- SINGLE-POINT SUPPLY CONNECTION – TERMINAL BLOCK, NON-FUSED DISCONNECT SWITCH OR CIRCUIT BREAKER
- USER CONTROL WIRING INPUTS
- USER CONTROL WIRING OUTPUTS
- SECTION 5 – TECHNICAL DATA
- OPERATIONAL LIMITATIONS (ENGLISH)
- HEAT EXCHANGER FLOW, GPM
- PHYSICAL DATA (ENGLISH)
- ELECTRICAL DATA
- ELECTRICAL NOTES
- ELECTRICAL DATA W/O PUMPS
- ELECTRICAL DATA W/ PUMPS
- ELECTRICAL NOTES AND LEGEND
- WIRING DIAGRAMS
- DIMENSIONS (ENGLISH)
- TECHNICAL DATA – CLEARANCES
- WEIGHT DISTRIBUTION AND ISOLATOR MOUNTING POSITIONS
- ISOLATOR INFORMATION FOR UNITS SHIPPED ON OR AFTER JUNE 15, 2008
- ISOLATOR INFORMATION FOR UNITS SHIPPED BEFORE JUNE 15, 2008
- SLRS Seismic Isolator Specifications
- SLRS Seismic Isolator Installation and Adjustment
- One Inch Deflection Spring Isolator Cross-reference
- Installation of 1” Deflection Mounts
- Neoprene Isolator Cross-reference
- Two Inch Deflection, Seismic Spring IsolatorCross-reference - SLRS
- SLRS Seismic Isolator Installation and Adjustment
- SECTION 6 – COMMISSIONING
- SECTION 7 – UNIT CONTROLS
- SECTION 8 – UNIT OPERATION
- CAPACITY CONTROL
- SUCTION PRESSURE LIMIT CONTROLS
- DISCHARGE PRESSURE LIMIT CONTROLS
- LEAVING CHILLED LIQUID CONTROL
- LEAVING CHILLED LIQUID CONTROLOVERRIDE TO REDUCE CYCLING
- LEAVING CHILLED LIQUID SYSTEM LEAD/LAG AND COMPRESSOR SEQUENCING
- RETURN CHILLED LIQUID CONTROL
- RETURN CHILLLED LIQUID SYSTEM LEAD/LAG AND COMPRESSOR SEQUENCING
- ANTI-RECYCLE TIMER
- ANTI-COINCIDENCE TIMER
- EVAPORATOR PUMP CONTROL & YORK HYDRO KIT PUMP CONTROL
- EVAPORATOR HEATER CONTROL
- PUMPDOWN CONTROL
- STANDARD CONDENSER FAN CONTROL
- LOAD LIMITING
- COMPRESSOR RUN STATUS
- ALARM STATUS
- REMOTE BAS/EMS TEMPERATURE RESET USINGA VOLTAGE OR CURRENT SIGNAL
- SECTION 9 – SERVICE AND TROUBLESHOOTING
- SECTION 10 – MAINTENANCE
JOHNSON CONTROLS
36
FORM 150.72-NM1 (908)
Installation
Drain connections should be provided at all low points
to permit complete drainage of the cooler and system
water piping.
A small valve or valves should be installed at the highest
point or points in the chilled water piping to allow any
trapped air to be purged. Vent and drain connections
should be extended beyond the insulation to make them
accessible.
The piping to and from the cooler must be designed to
suit the individual installation. It is important that the
following considerations be observed:
1. The chilled liquid piping system should be laid out
so that the circulating pump discharges directly
into the cooler. The suction for this pump should
be taken from the piping system return line and not
the cooler. This piping scheme is recommended,
but is not mandatory.
2. The inlet and outlet cooler connection sizes are
provided in Table 4 (Physical Data).
3. A strainer, preferably 40 mesh, must be installed
in the cooler inlet line just ahead of the cooler. This
is important to protect the cooler from entrance of
large particles which could cause damage to the
evaporator.
4. All chilled liquid piping should be thoroughly
ushed to free it from foreign material before
the system is placed into operation. Use care not
to ush any foreign material into or through the
cooler.
5. As an aid to servicing, thermometers and pressure
gauges should be installed in the inlet and outlet
water lines.
6. The chilled water lines that are exposed to outdoor
ambients should be wrapped with supplemental
heater cable and insulated to protect against freeze-
up during low ambient periods, and to prevent
formation of condensation on lines in warm humid
locations.
7. A chilled water ow switch, (either by YORK or
others) MUST be installed in the leaving water
piping of the cooler. There should be a straight
horizontal run of at least 5 diameters on each side
of the switch. Adjust the ow switch paddle to the
size of the pipe in which it is to be installed (see
manufacturer’s instructions furnished with the
switch). The switch is to be wired to Terminals
13 – 14 of XTBC1 located in the control panel, as
shown on the unit wiring diagram.
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PIPEWORK ARRANGEMENT
The following are suggested pipework arrangements for
single unit installations, for multiple unit installations,
each unit should be piped as shown.
Recommendations of the Building Services
Research Association.
FIG. 8 – CHILLED LIQUID SYSTEM
ISOLATING VALVE - NORMALLY OPEN
ISOLATING VALVE - NORMALLY CLOSED
FLOW REGULATING VALVE
FLOW MEASUREMENT DEVICE
STRAINER
PRESSURE TAPPING
FLOW SWITCH
FLANGED CONNECTION
LD06597
LD06596