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Troubleshooting Instructions
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION CONSIDERATIONS . . . . . . . . . . . . . 1-5
Default Address and Baud Rate . . . . . . . . . . . . . . . . . . 1
Input Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
I/O Type Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . 5
CONFIGURATION TABLES . . . . . . . . . . . . . . . . . . . . .5-11
Alarm Service Configuration . . . . . . . . . . . . . . . . . . . . . 5
Service Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Time Broadcast Configuration . . . . . . . . . . . . . . . . . . . 7
Holiday Configuration Screens . . . . . . . . . . . . . . . . . . . 8
Time Schedule Configuration . . . . . . . . . . . . . . . . . . . . 8
Points Display Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Occupancy Maintenance Table . . . . . . . . . . . . . . . . . . . 9
CSM III INTERFACE REQUIREMENTS . . . . . . . . .11,12
Chiller Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CCN Control Variables . . . . . . . . . . . . . . . . . . . . . . . . . . 12
CONTROL ALGORITHMS. . . . . . . . . . . . . . . . . . . . . .12,13
Control Modes (Shutdown/Local/
CCN/Stand-Alone) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chiller Start/Stop Function . . . . . . . . . . . . . . . . . . . . . . 12
Chilled Water Set Point Reset Function . . . . . . . . . 13
Demand Limit Function . . . . . . . . . . . . . . . . . . . . . . . . . 13
Alarm Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
GENERAL
The CSM Chiller Interface allows chillers not manufactured
by Carrier and older Carrier chillers to communicate over a
Carrier Comfort Network (CCN) in order to become part of a
system controlled by a Chiller System Manager III (CSM III).
NOTE: The CSM Chiller Interface is NOT compatible with
the Flotronic™ System Manager.
The CSM Chiller Interface provides hardwired control of
chillers using industry standard I/O methods, such as thermistor
sensor inputs, discrete outputs driving field-supplied relays, and
0 to 10 vdc or 4 to 20 mA control signals. The CSM III supports
a service function (CCN/Local) to allow a chiller to be run
under local control without disturbing the overall control
system. Stand-alone control functions are enabled if CSM III
communications fail. The Chiller Interface provides alarm
messages, display tables, and configuration tables that are
compatible with standard CCN interfaces.
The Chiller Interface can be installed on centrifugal com-
pressor, screw compressor, and reciprocating compressor
chillers manufactured by Carrier, Trane, York, McQuay, and
others, providing those chillers meet the Chiller Interface's I/O
requirements. One Chiller Interface is required for each indi-
vidual chiller. A pictorial representation of the CSM III/Chiller
Interface system is shown in Fig. 1.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Book 1
4
Tab
11a 13a
Controls Operation and
Page
Catalog No. 533-396
Printed in U.S.A.
Carrier Comfort Network
CSM Chiller Interface
CONTROLS
The Chiller Interface provides the following functions:
• allows a non-CCN equipped chiller to participate in a
multiple chiller system with CSM III (up to 8 chillers)
• provides chiller start/stop, chilled water reset, and
demand limiting control functions
• provides a Time Schedule backup mode for local control
and in the event of CSM III communication failure
(stand-alone mode)
• provides CCN user access (through configuration and
display screens) and CCN alarm messages
• provides adjustable communications baud rate from
9600 (default) to 38,400 bps
The Chiller Interface must be installed on the same CCN
bus as the CSM III. The pump control must be provided by the
native chilled water plant controls and is not provided by the
CSM Chiller Interface.
Chillers to which the Chiller Interface is connected must
support specific input types such as contact closure for chiller
start/stop, and 0 to 10 vdc or 4 to 20 mA inputs for chilled
water set point reset and demand limiting.
The Chiller Interface consists of an outdoor rated version of
the Comfort Controller 1600 module (CC1600) with special-
ized software. The module is connected to the CCN (Level II
Bus) through its primary communication port (RS-485). The
module's I/O channels are connected to the native chiller con-
troller and to sensors installed at the chiller.
INSTALLATION CONSIDERATIONS
The Chiller Interface is field-installed in a standard CCN
enclosure and powered from a standard CCN power supply.
All installations must comply with local wiring codes.
The Chiller Interface can be returned to its factory configu-
ration by installing a LID cable jumpered between CCN RJ-11
and I/O RJ-11 and cycling power. To perform a reset, the
Chiller Interface must be disconnected from the CCN bus.
Also, the CCN address will default back to 0, 1.
Figure 2 shows the location of the power connector.
Figure 3 shows the location of the communication connector.
Default Address and Baud Rate -
Interface's default address is 0,99 (bus number, system element
number). Default baud rate is 9600 bps. The address and baud
rate can be set using Address Search in Network Service Tool IV
or Service Pack.
Form 33CN-1T
Pg 1
The CSM Chiller
1202
11-02
Replaces: New
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Summary of Contents for Carrier CSM
-
Page 1: Table Of Contents
Figure 2 shows the location of the power connector. sensor inputs, discrete outputs driving field-supplied relays, and 0 to 10 vdc or 4 to 20 mA control signals. The CSM III supports Figure 3 shows the location of the communication connector. - Page 2 Chiller Interface CSM III - calculates/stores Chiller Data Table - reads Chiller Data Table - sets CHIL_S_S Discrete Output - writes CHIL_S_S - calculates reset output - writes LCW_STPT based on LCW_STPT - writes DEM_LIM - calculates demand output based on DEM_LIM...
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Page 3: Input Wiring
See Fig. 4. to the low load recycle status determination (LCW) and the CSM III’s emergency temperature averaging algorithm. If not The safety input can be connected to the chiller's safety fault used, the value –40.0 F is displayed in these locations. - Page 4 INPUT To Pin 3 CHANNEL S I G N A L + S I G N A L – S I G N A L + FROM CHILLER S I G N A L – SAFETY OUTPUT S I G N A L + S I G N A L –...
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Page 5: I/O Type Switch Settings
If the sensor temperature reading falls below this limit, tor J6 on the module. See Fig. 4. Switch settings are shown in the CSM Chiller Interface will generate an alarm to warn that Table 3. the sensor value is too low. - Page 6 Table 4 — Service Configuration Table DESCRIPTION STATUS/UNITS POINT RANGE DEFAULT Chiller Status/Capacity Current Transducer Type CTTYPE Current Transducer Amps XXXX amps CTAMPS 0-9999 Chiller Off Amps XXXX amps OLAMPS 0-9999 No Load Amps XXXX amps ZLAMPS 0-9999 Full Load Amps XXXX amps FLAMPS 0-9999...
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Page 7: Time Broadcast Configuration
CHW RESET FUNCTION POINT LOGIC — Use this deci- LCW TEMPERATURE SENSOR TYPE — Use this deci- sion to enter the point logic type for the Setpoint Reset sion to enter the type of the optional leaving chilled water function. temperature sensor. -
Page 8: Holiday Configuration Screens
START WEEK — This decision is used to enter the week of START MONTH — The start month is the month in which the month when the real time clock will adjust the time for the the holiday starts. Months are represented by numbers with 1 start of daylight savings time. -
Page 9: Points Display Table
Table 7 — Time Schedule Configuration Table (Type 14H) Table Name: OCCDEFCS DESCRIPTION STATUS/UNITS POINT RANGE DEFAULT Manual Override Hours X hours OVRD Period 1: Day of Week XXXXXXXX DOW1 00000000 Period 1: Occupied from XX:XX OCC1 0:00-23:59 0:00 Period 1: Occupied to XX:XX UNOCC1 0:00-23:59... - Page 10 3. Current Control Point is normally the calculated leaving chilled “3 = UNAVAIL”, “4 = RESTART”, “5 = FAULTED”. water set point value (including reset) from the CSM III. For Local or Stand-Alone mode, it is the configured native CHW set NOTES: point.
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Page 11: Csm Iii Interface Requirements
In order for the Chiller Interface to be controlled by the NOTE: If the current mode is occupied, this point makes CSM III it includes a chiller interface table and standard vari- reference to the next occupied period and, in most cases, able names. -
Page 12: Ccn Control Variables
To control the chiller from The DEM_LIM variable, normally written by CSM III the CCN, a device such as a CSM III can force three specific every 10 seconds, will be the criteria for determining CSM III CCN variables (see below). Force commands received from communication status. -
Page 13: Chilled Water Set Point Reset Function
The Demand Limit output value is calculated Alarm activity is stored in an Alarm History Table, contain- based on the DEM_LIM variable received from the CSM III or ing the 25 most recent alarm messages. other network force. - Page 16 Copyright 2002 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 533-396 Printed in U.S.A. Form 33CN-1T Pg 16 1202 11-02...
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