Carrier AQUASNAP 30RB060-390 User guide

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300028-01 Printed in U.S.A. Form 30RB-3T Pg 1 12-09 Replaces: 30RB-2T
Controls, Start-Up, Operation, Service
and Troubleshooting
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Conventions Used in This Manual . . . . . . . . . . . . . . . . . . .3
Basic Control Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
• SCROLLING MARQUEE DISPLAY
• ACCESSORY NAVIGATOR™ DISPLAY MODULE
CONTROLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-43
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Scroll Protection Module (SPM). . . . . . . . . . . . . . . . . . . . . .7
Electronic Expansion Valve (EXV) Board . . . . . . . . . . . .8
Fan Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Reverse Rotation Board . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
• DIAL SETTINGS
• PHASE REVERSAL PROTECTION
• PHASE LOSS AND UNDER-VOLTAGE
PROTECTION
Enable-Off-Remote Contact Switch. . . . . . . . . . . . . . . . .13
Emergency On/Off Switch . . . . . . . . . . . . . . . . . . . . . . . . . .13
Energy Management Module (EMM) . . . . . . . . . . . . . . . .14
Energy Management Module
Heat Reclaim (EMM HR) . . . . . . . . . . . . . . . . . . . . . . . . . .15
Local Equipment Network . . . . . . . . . . . . . . . . . . . . . . . . . .16
Board Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Control Module Communication . . . . . . . . . . . . . . . . . . . .16
•REDLED
• GREEN LED
• YELLOW LED
Carrier Comfort Network®(CCN) Interface . . . . . . . . . .16
Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
• MINIMUM LOAD CONTROL
• RAMP LOADING
• MINUTES OFF TIME
Dual Chiller Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
• CAPACITY CONTROL OVERRIDES
Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
• LOW AMBIENT TEMPERATURE HEAD PRESSURE
CONTROL OPTION
• LOW AMBIENT TEMPERATURE HEAD PRESSURE
CONTROL OPERATING INSTRUCTIONS
Cooler Pump Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Machine Control Methods . . . . . . . . . . . . . . . . . . . . . . . . . .32
• SWITCH CONTROL
• TIME SCHEDULE
• CCN CONTROL
• UNIT RUN STATUS
Cooling Set Point Selection . . . . . . . . . . . . . . . . . . . . . . . .33
• SET POINT 1
• SET POINT 2
•4TO20mAINPUT
• DUAL SWITCH
• SET POINT OCCUPANCY
Temperature Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
• 2-STEP SWITCH CONTROLLED
Page
• EXTERNALLY POWERED (4 to 20 mA Controlled)
• CCN LOADSHED CONTROLLED
Remote Alarm and Alert Relays . . . . . . . . . . . . . . . . . . . . 41
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43,44
System Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44,45
Actual Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
• TEMPERATURES
•VOLTAGE
• MINIMUM FLUID LOOP VOLUME
• FLOW RATE REQUIREMENTS
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45-49
Sequence of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Dual Chiller Sequence of Operation . . . . . . . . . . . . . . . . 45
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Optional Heat Reclaim Module . . . . . . . . . . . . . . . . . . . . . 49
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-57
Electronic Expansion Valve (EXV) . . . . . . . . . . . . . . . . . . 49
• EXV TROUBLESHOOTING PROCEDURE
Cooler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
• FREEZE PROTECTION
• LOW FLUID TEMPERATURE
• LOSS OF FLUID FLOW PROTECTION
• TUBE PLUGGING
• RETUBING
• TIGHTENING COOLER HEAD BOLTS
• CHILLED WATER FLOW SWITCH
RTPF Condenser Coil Maintenance and Cleaning
Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
• REMOVE SURFACE LOADED FIBERS
• PERIODIC CLEAN WATER RINSE
• ROUTINE CLEANING OF COIL SURFACES
MCHX Condenser Coil Maintenance and Cleaning
Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Condenser Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Refrigerant Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
• LEAK TESTING
• REFRIGERANT CHARGE
Safety Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
• COMPRESSOR PROTECTION
• CRANKCASE HEATERS
Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
• HIGH-SIDE PROTECTION
• LOW-SIDE PROTECTION
Compressors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
• COMPRESSOR REPLACEMENT
• OIL CHARGE
• SYSTEM BURNOUT CLEANUP PROCEDURE
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Recommended Maintenance Schedule . . . . . . . . . . . . . 57
TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . 57-81
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
• DIAGNOSTIC ALARM CODES AND POSSIBLE
CAUSES
AQUASNAP®
30RB060-390
Air-Cooled Liquid Chillers

2
CONTENTS (cont)
Page
Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Thermistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
• COOLER LEAVING FLUID SENSOR
• COOLER ENTERING FLUID SENSOR
• DUAL CHILLER LWT
• COMPRESSOR RETURN GAS TEMPERATURE
• OUTDOOR AIR TEMPERATURE
• REMOTE SPACE TEMPERATURE
Service Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
APPENDIX A — LOCAL DISPLAY TABLES . . . . . . 82-93
APPENDIX B — CCN TABLES . . . . . . . . . . . . . . . . . . 94-107
APPENDIX C — CCN ALARM DESCRIPTION . . 108-111
APPENDIX D — R-410A PRESSURE VS.
TEMPERATURE CHART. . . . . . . . . . . . . . . . . . . . . . . . . 112
INDEX. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113,114
START-UP CHECKLIST FOR 30RB
LIQUID CHILLER . . . . . . . . . . . . . . . . . . . . . . . . CL-1 to CL-9
SAFETY CONSIDERATIONS
Installing, starting up, and servicing this equipment can be
hazardous due to system pressures, electrical components, and
equipment location (roof, elevated structures, etc.). Only
trained, qualified installers and service mechanics should
install, start up, and service this equipment. When working on
this equipment, observe precautions in the literature, and on
tags, stickers, and labels attached to the equipment, and any
other safety precautions that apply. Follow all safety codes.
Wear safety glasses and work gloves. Use care in handling,
rigging, and setting this equipment, and in handling all electri-
cal components..
GENERAL
This publication contains Controls, Operation, Start-Up,
Service and Troubleshooting information for the 30RB060-390
air-cooled liquid chillers with electronic controls. The 30RB
chillers are equipped with ComfortLink™ controls and
electronic expansion valves.
NOTE: Unit sizes 315-390 are modular units that are shipped
in separate sections as modules A or B as noted in position 8 of
the unit model number. Installation directions specific to these
units are noted in these instructions. For modules 315A, 315B,
330A, 330B, 345A, 345B, and 360B, follow all general
instructions as noted for unit sizes 30RB160,170. For modules,
360A, 390A, and 390B follow instructions for 30RB190. See
Table 1 for a listing of unit sizes and modular combinations.
WARNING
Electrical shock can cause personal injury and death. Shut
off all power to this equipment during installation. There
may be more than one disconnect switch. Tag all discon-
nect locations to alert others not to restore power until work
is completed.
WARNING
DO NOT VENT refrigerant relief valves within a building.
Outlet from relief valves must be vented outdoors in
accordance with the latest edition of ANSI/ASHRAE
(American National Standards Institute/American Society
of Heating, Refrigeration and Air Conditioning Engineers)
15 (Safety Code for Mechanical Refrigeration). The
accumulation of refrigerant in an enclosed space can
displace oxygen and cause asphyxiation. Provide adequate
ventilation in enclosed or low overhead areas. Inhalation of
high concentrations of vapor is harmful and may cause
heart irregularities, unconsciousness or death. Misuse can
be fatal. Vapor is heavier than air and reduces the amount
of oxygen available for breathing. Product causes eye and
skin irritation. Decomposition products are hazardous.
WARNING
DO NOT attempt to unbraze factory joints when servicing
this equipment. Compressor oil is flammable and there is
no way to detect how much oil may be in any of the
refrigerant lines. Cut lines with a tubing cutter as required
when performing service. Use a pan to catch any oil that
may come out of the lines and as a gage for how much oil
to add to system. DO NOT re-use compressor oil.
CAUTION
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out
components, or to bypass or otherwise depart from recom-
mended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.
CAUTION
To prevent potential damage to heat exchanger, always run
fluid through heat exchanger when adding or removing
refrigerant charge. Use appropriate brine solutions in cooler
fluid loop to prevent the freezing of brazed plate heat
exchanger, optional hydronic section and/or interconnecting
piping when the equipment is exposed to temperatures
below 32 F (0° C). Proof of flow switch and strainer are
factory installed on all models. Do NOT remove power
from this chiller during winter shutdown periods without
taking precaution to remove all water from heat exchanger
and optional hydronic system. Failure to properly protect
the system from freezing may constitute abuse and may
void warranty.
CAUTION
Compressors and optional hydronic system pumps require
specific rotation. Test condenser fan(s) first to ensure
proper phasing. Swap any two incoming power leads to
correct condenser fan rotation before starting any other
motors. Operating the unit without testing the condenser
fan(s) for proper phasing could result in equipment
damage.
CAUTION
Refrigerant charge must be removed slowly to prevent loss
of compressor oil that could result in compressor failure.
CAUTION
Puron®refrigerant (R-410A) systems operate at higher
pressures than standard R-22 systems. Do not use R-22 ser-
vice equipment or components on Puron refrigerant equip-
ment. If service equipment is not rated for Puron
refrigerant, equipment damage or personal injury may
result.

3
NOTE: The nameplate for modular units contains only the first
two digits in the model number. For example, 315A and 315B
nameplates read 31A and 31B.
Table 1 — Modular Unit Combinations
NOTE: An “A” in the model number indicates the design series.
Conventions Used in This Manual — The follow-
ing conventions for discussing configuration points for the
local display (scrolling marquee or Navigator™ accessory)
will be used in this manual.
Point names will be written with the mode name first, then
any sub-modes, then the point name, each separated by an
arrow symbol (. Names will also be shown in bold
and italics. As an example, the Lead/Lag Circuit Select Point,
which is located in the Configuration mode, Option sub-mode,
would be written as Configuration OPTNLLCS.
This path name will show the user how to navigate through
the local display to reach the desired configuration. The user
would scroll through the modes and sub-modes using the
and keys. The arrow symbol in the path name repre-
sents pressing to move into the next level of the
menu structure.
When a value is included as part of the path name, it will be
shown at the end of the path name after an equals sign. If the
value represents a configuration setting, an explanation will
be shown in parenthesis after the value. As an example,
ConfigurationOPTNLLCS = 1 (Circuit A leads).
Pressing the and keys simultaneously
will scroll an expanded text description of the point name or
value across the display. The expanded description is shown in
the local display tables but will not be shown with the path
names in text.
The CCN (Carrier Comfort Network®) point names are also
referenced in the local display tables for users configuring the
unit with CCN software instead of the local display. The CCN
tables are located in Appendix B of the manual.
Basic Control Usage
SCROLLING MARQUEE DISPLAY — The scrolling mar-
quee display is the standard interface display to the ComfortLink
Control System for 30RB units. The display has up and down
arrow keys, an key, and an key. These
keys are used to navigate through the different levels of the
display structure. Press the key until the highest
operating level is displayed to move through the top 11 mode
levels indicated by LEDs (light-emitting diodes) on the left side
of the display. See Fig. 1.
Once within a mode or sub-mode, pressing the
and keys simultaneously will put the scrolling
marquee display into expanded text mode where the full mean-
ing of all sub-modes, items and their values can be displayed
for the current selection. Press the and
keys to return the scrolling marquee display to its default menu
of rotating display items (those items in Run Status
 VIEW).
In addition, the password will be disabled, requiring that it be
entered again before changes can be made to password
protected items. Press the key to exit out of the ex-
panded text mode.
NOTE: When the Language Selection (Configuration

DISP  LANG), variable is changed, all appropriate display
expansions will immediately change to the new language. No
power-off or control reset is required when reconfiguring
languages.
When a specific item is located, the item name alternates
with the value. Press the key at a changeable item
and the value will be displayed. Press again and the
value will begin to flash indicating that the value can be
changed. Use the up and down arrow keys to change the value,
and confirm the value by pressing the key.
Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. Press
so that the item value flashes. Use the arrow keys to
change the value or state and press the key to accept
it. Press the key to return to the next higher level of
structure. Repeat the process as required for other items.
Items in the Configuration and Service Test modes are pass-
word protected. The words ‘PASS’ and ‘WORD’ will alternate
on the display when required. The default password is 0111.
Press and the 1111 password will be displayed. Press
again and the first digit will begin to flash. Use the
arrow keys to change the number and press to accept
the digit. Continue with the remaining digits of the password.
The password can only be changed through CCN operator in-
terface software such as ComfortWORKS®, ComfortVIEW™
and Service Tool.
See Table 2 and Appendix A for further details.
ACCESSORY NAVIGATOR™ DISPLAY MODULE —
The Navigator module provides a mobile user interface to the
ComfortLink™ control system, which is only available as a
field-installed accessory. The display has up and down arrow
keys, an key, and an key. These keys are
used to navigate through the different levels of the display
structure. Press the key until ‘Select a Menu Item’
is displayed to move through the top 11 mode levels indicated
by LEDs on the left side of the display. See Fig. 2.
Once within a Mode or sub-mode, a “>” indicates the cur-
rently selected item on the display screen. Pressing the
and keys simultaneously will put the Nav-
igator module into expanded text mode where the full meaning
of all sub-modes, items and their values can be displayed. Press-
ing the and keys when the display says
‘Select Menu Item’ (Mode LED level) will return the Navigator
module to its default menu of rotating display items (those items
UNIT SIZE MODULE A MODULE B
30RBA315 30RBA160 30RBA160
30RBA330 30RBA170 30RBA160
30RBA345 30RBA170 30RBA170
30RBA360 30RBA190 30RBA170
30RBA390 30RBA190 30RBA190
ENTER
ESCAPE
ENTER
ENTER
ESCAPE
ESCAPE
ENTER
ESCAPE
ENTER
ESCAPE
ESCAPE
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
Alarm Status
ENTER
MODE
ESCAPE
Fig. 1 — Scrolling Marquee Display
ENTER
ENTER
ENTER
ENTER
ENTER
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ESCAPE
ENTER
ESCAPE
ENTER
ESCAPE

4
in Run Status
 VIEW). In addition, the password will be dis-
abled, requiring that it be entered again before changes can be
made to password protected items. Press the key to
exit out of the expanded text mode.
NOTE: When the Language Selection (Configuration

DISP  LANG), variable is changed, all appropriate display
expansions will immediately change to the new language. No
power-off or control reset is required when reconfiguring
languages.
When a specific item is located, the item name appears on the
left of the display, the value will appear near the middle of the
display and the units (if any) will appear on the far right of the
display. Press the key at a changeable item and the val-
ue will begin to flash. Use the up and down arrow keys to change
the value, and confirm the value by pressing the key.
Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. Press
so that the item value flashes. Use the arrow keys to
change the value or state and press the key to accept
it. Press the key to return to the next higher level of
structure. Repeat the process as required for other items.
Items in the Configuration and Service Test modes are pass-
word protected. The words Enter Password will be displayed
when required, with 1111 also being displayed. The default
password is 0111. Use the arrow keys to change the number
and press to enter the digit. Continue with the re-
maining digits of the password. The password can only be
changed through CCN operator interface software such as
ComfortWORKS, ComfortVIEW and Service Tool.
Adjusting the Contrast — The contrast of the display can be
adjusted to suit ambient conditions. To adjust the contrast of
the Navigator module, press the key until the dis-
play reads, “Select a menu item.” Using the arrow keys move
to the Configuration mode. Press to obtain access to
this mode. The display will read:
> TEST OFF
METR OFF
LANG ENGLISH
Pressing will cause the “OFF” to flash. Use the up
or down arrow to change “OFF” to “ON”. Pressing
will illuminate all LEDs and display all pixels in the view
screen. Pressing and simultaneously
allows the user to adjust the display contrast. Use the up or
down arrows to adjust the contrast. The screen’s contrast will
change with the adjustment. Press to accept the
change. The Navigator module will keep this setting as long as
it is plugged in to the LEN (local equipment network) bus.
Adjusting the Backlight Brightness — The backlight of the
display can be adjusted to suit ambient conditions. The factory
default is set to the highest level. To adjust the backlight of the
Navigator module, press the key until the display
reads, “Select a menu item.” Using the arrow keys move to the
Configuration mode. Press to obtain access to this
mode. The display will read:
> TEST OFF
METR OFF
LANG ENGLISH
Pressing will cause the “OFF” to flash. Use the up
or down arrow keys to change “OFF” to “ON”. Pressing
will illuminate all LEDs and display all pixels in the
view screen. Pressing the up and down arrow keys simultane-
ously allows the user to adjust the display brightness. Use the
up or down arrow keys to adjust screen brightness. Press
to accept the change. The Navigator module will
keep this setting as long as it is plugged in to the LEN bus.
Table 2 — ComfortLink™ Display Menu Structure
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ENTER
ENTER
ENTER
MODE
RUN
STATUS
SERVICE
TEST TEMPERATURE PRESSURE SET POINTS INPUTS OUTPUTS CONFIGURATION TIME CLOCK
OPERATING
MODES ALARMS
Auto
Display
(VIEW)
Manual
Test Mode
(TEST)
Unit
Temperatures
(UNIT)
Circuit A
Pressures
(PRC.A)
Cooling
Setpoints
(COOL)
General
Inputs
(GEN.I)
Circuit A
Outputs
(CIR.A)
Display
Configuration
(DISP)
Time of Day
(TIME)
Operating
Control
Typ e
(SLCT)
Reset
Current
Alarms
(R.ALM)
Remote
User
Interface
(R.CCN)
Quick
Te s t
Mode
(QUIC)
Circuit A
Temperatures
(CIR.A)
Circuit B
Pressures
(PRC.B)
Heating
Setpoints
(HEAT)
Circuit B
Outputs
(CIR.B)
Unit
Configuration
(UNIT)
Day, Date
(DATE)
Operating
Modes
(MODE)
Current
Alarms
(ALRM)
Machine
Starts/
Hours
(RUN)
Circuit B
Temperatures
(CIR.B)
Circuit C
Pressures
(PRC.C)
Misc.
Setpoints
(MISC)
Circuit C
Outputs
(CIR.C)
Service
Configurations
(SERV)
Schedule 1
(SCH1)
Alarm
History
(H.ALM)
Compressor
Run Hours
(HOUR)
Circuit C
Temperatures
(CIR.C)
General
Outputs
(GEN.O)
Options
Configuration
(OPTN)
Schedule 2
(SCH2)
Compressor
Starts
(STRT)
Reset, Demand
Limit, Master/Slave
(RSET)
Holidays
(HOLI)
Fan Run
Hours
(FAN)
Service
Maintenance
Configuration
(MCFG)
Compressor
Disable
(CP.UN)
Predictive
Maintenance
(MAIN)
Software
Versions
(VERS)

5
CONTROLS
General — The 30RB air-cooled liquid chillers contain the
ComfortLink™ electronic control system that controls and
monitors all operations of the chiller. The control system is
composed of several components as listed in the following sec-
tions. All machines have at the very least a main base board
(MBB), scrolling marquee display, electric expansion valve
board (EXV), fan board, one scroll protection module (SPM)
per compressor, Emergency On/Off switch, an Enable-Off- Re-
mote Contact switch and a reverse rotation board.
Main Base Board (MBB) — The MBB is the heart of
the ComfortLink control system, which contains the major
portion of operating software and controls the operation of the
machine. See Fig. 3. The MBB continuously monitors input/
output channel information received from its inputs and from
all other modules. The MBB receives inputs from status and
feedback switches, pressure transducers and thermistors. The
MBB also controls several outputs. Some inputs and outputs to
control the machine are located on other boards, but are trans-
mitted to or from the MBB via the internal communications
bus. Information is transmitted between modules via a 3-wire
communication bus or LEN (Local Equipment Network). The
CCN (Carrier Comfort Network) bus is also supported. Con-
nections to both LEN and CCN buses are made at TB3. For a
complete description of main base board inputs and outputs
and their channel identifications, see Table 3.
Run Status
Service Tes t
Tem peratures
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
ENTER
ESC
MODE
Alarm Status
ComfortLink
Fig. 2 — Accessory Navigator Display Module
221
221
221
221
195
195
195
195
195
195
195
CH1 CH2 CH3 CH4
CH11 CH12
LOCATION OF
SERIAL NUMBER
CH13 CH14 CH
15A
J4
ANALOG
INPUTS
J3
J2C
J2B
J15
J1A
J9D
+ G –
DISCRETE
INPUTS
J5A
C
16A
CH
15B
C
C
CH16B
11 C16
J2A
TR1 TR2 TR3 TR4 TR5
CH19 CH20 CH21 CH22 CH23 CH24 CH25 CH26
J8
CH17 CH18
J5B J5C
THERMISERS PRESSURES
CH5 CH6 CH7 CH8 CH9
J7A J7B J7C J7D
RELAY
OUTPUTS
MOV1
C41 C42 C43
C32 C33 C34 C35
12/11 12/11
J10 19 J12 J13 + G -
STATUS
J9A
K1 K2
D15
J6
CCN
CH10
+ G –
SIO
(LEN)
J9C J9B
+ G –
Fig. 3 — Main Base Board

6
Table 3 — Main Base Board Inputs and Outputs
* Controls discharge and liquid line isolation soleniods for 30RB120-190 brine units only.
DESCRIPTION INPUT/OUTPUT I/O TYPE SCROLLING MARQUEE
POINT NAME
CONNECTION POINT
Pin Notation
Power (24 vac supply) —— —
MBB-J1, MBB-J1A,
MBB-J1B
11 24 vac
12 Ground
Local Equipment Network —— —
MBB-J9A, MBB-J9B,
MBB-J9C, MBB-J9D
+
G
-
Carrier Comfort Network®
(CCN) —— —
MBB-J12
+
G
-
External Chilled
Water Pump Interlock PMPI Switch INPUTS
 GEN.I  LOCK MBB-J4-CH15A
Chilled Water Flow Switch CWFS Switch INPUTS
 GEN.I  LOCK MBB-J5A-CH15B
15B
Demand Limit Switch #1 Demand Limit SW1 Switch INPUTS
 GEN.I  DLS1 MBB-J4-CH13
Circuit A Discharge
Pressure Transducer DPTA Pressure Transducer (0-5 VDC) PRESSURE
 PRC.A  DP.A
MBB-J7A-CH6
5V 5 vdc Ref.
S Signal
R Return
Circuit B Discharge
Pressure Transducer DPTB Pressure Transducer
(0-5 VDC) PRESSURE
 PRC.B  DP.B
MBB-J7C-CH8
5V 5 vdc Ref.
S Signal
R Return
Dual Chiller
LWT Thermistor DUAL 5k Thermistor TEMPERATURE
 UNIT  CHWS MBB-J6-CH3
Dual Set Point Input Dual Set Point Switch INPUTS
 GEN.I  DUAL MBB-J4-CH12
Entering Water Thermistor EWT 5k Thermistor TEMPERATURE
 UNIT  EWT MBB-J6-CH2
Leaving Water Thermistor LWT 5k Thermistor TEMPERATURE
 UNIT  LWT MBB-J6-CH1
Outdoor Air Thermistor OAT 5k Thermistor TEMPERATURE
 UNIT  OAT MBB-J6-CH4
Pump #1 Interlock
Pump #2 Interlock
PMP1
PMP2 Switch INPUTS
 GEN.I  PUMP
MBB-J5C-CH18
18
C
Reverse Rotation Board Reverse Rotation Board Switch INPUTS
 GEN.I  ELEC MBB-J5A-CH16B
16B
Circuit A Suction
Pressure Transducer SPTA Pressure Transducer (0-5 VDC) PRESSURE
 PRC.A  SP.A
MBB-J7B-CH7
5V 5 vdc Ref.
S Signal
R Return
Circuit B Suction
Pressure Transducer SPTB Pressure Transducer (0-5 VDC) PRESSURE
 PR.B  SP.B
MBB-J7D-CH9
5V 5 vdc Ref.
S Signal
R Return
Unit Status Remote Contact-Off-Enable Switch INPUTS
 GEN.I  ONOF MBB-J4-CH11
Alarm Relay ALM R Relay OUTPUTS
 GEN.O  ALRM MBB-J3-CH24
Alert Relay ALT R Relay OUTPUTS
 GEN.O  ALRT MBB-J3-CH25
Cooler Heater CL-HT TRIAC OUTPUTS
 GEN.O  CO.HT MBB-J2B-CH21
Circuit A Minimum
Load Control* MLV-A TRIAC OUTPUTS
 CIR.A  HGB.A MBB-J2C-CH22
Circuit B Minimum
Load Control* MLV-B TRIAC OUTPUTS
 CIR.B  HGB.B MBB-J2C-CH23
Pump #1 Starter PMP1 TRIAC OUTPUTS
 GEN.O  PMP.1 MBB-J2A-CH19
Pump #2 Starter PMP2 TRIAC OUTPUTS
 GEN.O  PMP.2 MBB-J2A-CH20
Ready Relay RDY R Relay OUTPUTS
 GEN.O  REDY MBB-J3-CH26

7
Scroll Protection Module (SPM) — There is one
SPM per compressor and it is responsible for controlling that
compressor. See Fig. 4. The device controls the compressor
contactor and the compressor crankcase heater. The SPM mod-
ule also monitors the compressor motor temperature, and cir-
cuit high pressure switch. The SPM responds to commands
from the MBB (main base board) and sends the MBB the
results of the channels it monitors via the LEN (Local
Equipment Network). See below for SPM board address infor-
mation. See Table 4 for SPM inputs and outputs.
SPM-A1 DIP
Switch 12 3 456 7 8
Address: ON OFF OFF OFF ON OFF OFF OFF
SPM-A2 DIP
Switch 123 456 7 8
Address: OFF ON OFF OFF ON OFF OFF OFF
SPM-A3 DIP
Switch 1 23456 7 8
Address: OFF OFF ON OFF ON OFF OFF OFF
SPM-A4 DIP
Switch 1 2 3456 7 8
Address: OFF OFF OFF ON ON OFF OFF OFF
SPM-B1 DIP
Switch 12 3 4 567 8
Address: ON OFF OFF OFF OFF ON OFF OFF
SPM-B2 DIP
Switch 12345678
Address: OFF ON OFF OFF OFF ON OFF OFF
SPM-B3 DIP
Switch 1 234 567 8
Address: OFF OFF ON OFF OFF ON OFF OFF
SPM-B4 DIP
Switch 1 2 34567 8
Address: OFF OFF OFF ON OFF ON OFF OFF
SPM-C1 DIP
Switch 12345678
Address: ON OFF OFF OFF OFF OFF ON OFF
SPM-C2 DIP
Switch 12345678
Address: OFF ON OFF OFF OFF OFF ON OFF
SPM-C3 DIP
Switch 1 234 5 678
Address: OFF OFF ON OFF OFF OFF ON OFF
SPM-C4 DIP
Switch 1 2 345 678
Address: OFF OFF OFF ON OFF OFF ON OFF
12345678
ON
103
103
LOCATION OF
SERIAL NUMBER
QC1
QC2
JP4 JP1
JP2
JP5
JP6
D4
C19
D6 D5
Q4
D7
Q5
D9 U3
Q6 D8 Q3
SMD
JP3
F1
C46 D13 D14
LED1 LED2
Fig. 4 — Scroll Protection Module

8
Electronic Expansion Valve (EXV) Board — At
least one EXV board is used in all machines. There is one EXV
board for 2 circuit machines. Three circuit machines have two
EXV boards. See Fig. 5. The board is responsible for monitor-
ing the return gas temperature thermistors. The board also
signals the EXV motors to open or close. The electronic expan-
sion valve board responds to commands from the MBB and
sends the MBB the results of the channels it monitors via the
LEN (local equipment network). See below for DIP switch
information for EXV1 and EXV2. See Tables 5 and 6 for EXV
inputs and outputs.
Table 4 — Scroll Protection Module Inputs and Outputs*
* “x” denotes the circuit, A, B or C. “n” denotes the compressor number, 1, 2, 3, or 4.
Table 5 — EXV1 Board Inputs and Outputs
EXV1 DIP Switch 1 2 3 4 5 6 7 8
Address: ON ON ON ON ON ON OFF ON
EXV2 DIP Switch 1 2 3 4 5 6 7 8
Address: OFF ON ON ON ON ON OFF ON
DESCRIPTION INPUT/OUTPUT I/O TYPE SCROLLING MARQUEE
POINT NAME
CONNECTION POINT
Pin Notation
Power (24 vac supply) —— —
SPM-xn-J1
QC1 24 vac
QC2 Ground
Local Equipment Network —— —
SPM-xn-JP1
1+
2G
3-
SPM-xn-JP2
2+
3G
4-
Circuit x High Pressure Switch HPS-x Switch Not available
SPM-xn-JP3
1
2
Compressor xn Motor Temperature MTR-xn PTC Thermistor Not available
SPM-xn-JP4
1
2
Compressor xn Contactor Cxn Relay OUTPUTS
 CIR.x  CP.xn
SPM-xn-JP5
1
2
Crankcase Heater CCH Relay OUTPUTS
 CIR.x  HT.xn
SPM-xn-JP6
1
2
Circuit x High Pressure Switch HPS-x Switch Not available SPM-xn-JP2
1
DESCRIPTION INPUT/OUTPUT I/O TYPE SCROLLING MARQUEE
POINT NAME
CONNECTION POINT
Pin Notation
Power (24 vac supply) —— —
EXV1-J1
11 24 vac
12 Ground
Local Equipment Network —— —
EXV1-J4
1+
2G
3–
Circuit A Suction Gas Thermistor SGTA 5k Thermistor TEMPERATURE
 CIR.A  SGT.A EXV1-J3
THA
Circuit B Suction Gas Thermistor SGTB 5k Thermistor TEMPERATURE
 CIR.B  SGT.B EXV1-J3
THB
Circuit A EXV EXV-A Stepper Motor OUTPUTS
 CIR.A  EXV.A
EXV1-J2A
1
2
3
4
Circuit B EXV EXV-B Stepper Motor OUTPUTS
 CIR.B  EXV.B
EXV1-J2B
1
2
3
4

9
Fan Boards — At least one fan board is installed in each
unit. See Fig. 6 and 7. There are two types of fan boards, with
and without an analog output signal for the low ambient head
pressure control fan speed controllers. If a unit does not have
low ambient head pressure control installed, it will not have the
analog connection terminals. The fan board responds to com-
mands from the MBB and sends the MBB the results of the
channels it monitors via the LEN. See below for fan board 1, 2
and 3 DIP switch addresses. See Tables 7-9 for inputs and
outputs.
12345678
ON
100
100
257-01
712
100K
100K
100
12345
321
-G+
J3
12345
J2A EXVA J2B EXVB
24VAC
STAT U S
MOV1
LOCATION OF
SERIAL NUMBER
4321
THA THB
D4
D6
J1
C15
C16
D5
U5
Q2 Q1
L4
U4
12/11
C17
+
Q45
Q42Q37
G2
Q35
Q25
Q27
Q30
Q20 Q22
Q17 Q15
Q12
Q10
C10
Q7
S1
C11
U2
D2
L1
U1
C37C39
SB
D15
U6
C25
C49
Q4
Q5
L2 R2
R3L3D1
R9
TEMP
D29 D9 D8
SI0
(LEN)
COMM J4
Fig. 5 — EXV Board
FAN BOARD 1
DIP Switch 123 45678
Address: OFF ON OFF OFF ON OFF ON OFF
FAN BOARD 2
DIP Switch 12345678
Address: ON ON OFF OFF ON OFF ON OFF
FAN BOARD 3
DIP Switch 1 2345678
Address: OFF OFF ON OFF ON OFF ON OFF

10
Table 6 — EXV2 Inputs and Outputs
NOTE: EXV2 inputs and outputs are only used on 30RB210-300.
DESCRIPTION INPUT/OUTPUT I/O TYPE SCROLLING MARQUEE
POINT NAME
CONNECTION POINT
Pin Notation
Power (24 vac supply) —— —
EXV2-J1
11 24 vac
12 Ground
Local Equipment Network —— —
EXV2-J4
1+
2G
3–
Circuit C Suction Gas Thermistor SGTC 5k Thermistor TEMPERATURE
 CIR.C  SGT.C EXV2J3
THA
Circuit C EXV EXV-C Stepper Motor OUTPUTS
 CIR.C  EXV.C
EXV2-J2A
1
2
3
4
12345678
ON
100K
100K
100K
CH1 CH2 CH3CH4 CH5 CH6 CH7 CH8
TR1 TR2 TR3TR4 TR5 TR6 TR7 TR8
STAT U SSIO (LEN)
LOCATION OF
SERIAL NUMBER
24 VAC
CH13CH14
J9
J1
CH9 CH10 CH11 CH12
JP2
C61
CH13
D12 JP1
L3
L5
U21
L2
D6
D5
Q5 Y1
D7
D8
S1
D3
U1
Q1
U5
U6
U7
U8
U9
Q10
Q11
U10
J4
J3
J2
U4
U2
Q12
Q60
32 1
– G +
32 1
– G +
DIP SWITCH
Fig. 6 — Fan Board (AUX 1) with Low Ambient Temperature Head Pressure Control

11
Table 7 — Fan Board 1 (AUX1, AUX2) Outputs*
*Fan boards 1 and 2 will use the AUX1 board when the low ambient temperature head pressure control option is installed.
†Supplied on AUX1 board only
NOTE: Fan Board 1 is used on 30RB060-390.
DESCRIPTION INPUT/OUTPUT I/O TYPE SCROLLING MARQUEE
POINT NAME
CONNECTION POINT
Pin Notation
Power (24 vac supply) —— —
FB1-J1
11 24 vac
12 Ground
Local Equipment Network —— —
FB1-J9
+
G
-
+
G
-
Circuit A Low Ambient
Temperature Head Pressure
Control Speed Signal
MM-A† 0-10 VDC OUTPUTS
 CIR.A  SPD.A
FB1-CH9
+
-
Circuit B Low Ambient Temperature
Head Pressure Control Speed Signal
(sizes 060-150, 210-250)
MM-B† 0-10 VDC OUTPUTS
 CIR.B  SPD.B
FB1-CH10
+
-
Outdoor Fan Motor 1 OFM1 TRIAC
FB1-J2-CH1
(sizes 060-110)
FB1-J2-CH2
(sizes 120-150, 210-250)
FB1-J2-CH3
(sizes 160-190, 275, 300,
Duplex sizes 315-390)
Outdoor Fan Motor 2 OFM2 TRIAC
FB1-J2-CH2
(sizes 060-110)
FB1-J2-CH3
(sizes 120-150, 210-250)
FB1-J2-CH4
(sizes 160-190, 275, 300,
Duplex sizes 315-390)
Outdoor Fan Motor 3 OFM3 TRIAC
FB1-J2-CH3
(sizes 060,070,090-110)
FB1-J3-CH5
(size 080)
FB1-J2-CH1
(sizes 120-150, 210-250)
FB1-J2-CH2
(sizes 160-190, 275, 300,
Duplex sizes 315-390)
Outdoor Fan Motor 4 OFM4 TRIAC
FB1-J2-CH4
(sizes 060,070,130,
150,210-250)
FB1-J3-CH6
(size 080)
FB1-J3-CH7
(sizes 090-110)
FB1-J3-CH5
(sizes 160-190, 275-300,
Duplex sizes 315-390)
Outdoor Fan Motor 5 OFM5 TRIAC
FB1-J3-CH5
(sizes 090-110)
FB1-J3-CH6
(sizes 120-150, 210-250)
FB1-J2-CH1
(sizes 160-190, 275-300,
Duplex sizes 315-390)
Outdoor Fan Motor 6 OFM6 TRIAC
FB1-J3-CH6
(sizes 090-110,
160-190, 275-300,
Duplex sizes 315-390)
FB1-J3-CH7
(sizes 120-150, 210-250)
Outdoor Fan Motor 7 OFM7 TRIAC FB1-J3-CH5
(sizes 120-150, 210-250)
Outdoor Fan Motor 8 OFM8 TRIAC FB1-J3-CH8
(sizes 120-150, 210-250)

12
Table 8 — Fan Board 2 (AUX1, AUX2) Outputs*
*Fan boards 1 and 2 will use the AUX1 board when the low ambient temperature head pressure control option is installed.
†Output only on units with low ambient temperature head pressure control installed (AUX1).
NOTE: Fan Board 2 used on 30RB160-190, 275-300, 315-390.
DESCRIPTION INPUT/OUTPUT I/O TYPE SCROLLING MARQUEE
POINT NAME
CONNECTION POINT
Pin Notation
Power (24 vac supply) —— —
FB2-J1
11 24 vac
12 Ground
Local Equipment Network —— —
FB2-J9
+
G
-
+
G
-
Circuit B Low Ambient Temperature
Head Pressure Control
Speed Signal
(sizes 160-190, 275-300, 315-400)
MM-B† 0-10 VDC OUTPUTS
 CIR.B  SPD.B
FB2-CH9
+
-
Outdoor Fan Motor 7 OFM7† TRIAC
FB2-J2-CH2
(sizes 160, 170, 315-345, 360B)
FB2-J2-CH3
(sizes 190, 275, 300, 360A, 390)
Outdoor Fan Motor 8 OFM8 TRIAC
FB2-J2-CH3
(sizes 160, 170, 315-345, 360B)
FB2-J2-CH4
(sizes 190, 275, 300, 360A, 390)
Outdoor Fan Motor 9 OFM9 TRIAC
FB2-J2-CH1
(sizes 160, 170, 315-345, 360B)
FB2-J2-CH2
(sizes 190, 275, 300, 360A, 390)
Outdoor Fan Motor 10 OFM10 TRIAC
FB2-J2-CH4
(sizes 160, 170, 315-345, 360B)
FB2-J3-CH5
(sizes 190, 275, 300, 360A, 390)
Outdoor Fan Motor 11 OFM11 TRIAC FB2-J2-CH1
(sizes 190, 275-300, 360A, 390)
Outdoor Fan Motor 12 OFM12 TRIAC FB2-J3-CH6
(sizes 190, 275-300, 360A, 390)
12345678
ON
100K
100K
100K
LOCATION OF
SERIAL NUMBER
TR1 TR2 TR3TR4 TR5 TR6 TR7 TR8
CH1 CH2 CH3CH4 CH5 CH6 CH7 CH8
STAT U SSIO (LEN)
24 VAC
J1
J9
D4
U2
U5
Q2
Q7
Q3
U8
U9
Q9
Q10
Q11Q12
Q13
J4
J3
J2
S1
D7
Q5
Y1
D5 D6
L2
U6
U1
Q1
D3
C3
32 1
– G +
32 1
– G +
DIP SWITCH
Fig. 7 — Fan Board (AUX 2) without Low Ambient Temperature Head Pressure Control

13
Reverse Rotation Board — The reverse rotation
board monitors the three-phase electrical system to provide
phase reversal, phase loss and under-voltage protection. See
Fig. 8. In addition, a 24-v time delay relay and contactor is used
to deenergize the entire control power of the chiller as part of
the protection scheme. See Fig. 9. The reverse rotation board
has two LEDs (light-emitting diodes) and two adjustable dial
settings. Under normal conditions, the upper LED will light up
green. The lower LED is red and will flash (phase reversal) or
turn on solid (phase loss and under-voltage) according to the
conditions sensed.
DIAL SETTINGS — The reverse rotation board has two di-
als. See Fig. 8. The upper dial should be set to match the in-
coming three-phase voltage to the chiller with no compressors
running. This dial must be adjusted for 208/230-v chillers oper-
ating on 208-v power supply. The dial should be adjusted to
200-v minimum setting for this case. The lower dial is used for
trip delay and should be set fully counterclockwise to the mini-
mum 0.1 second setting. The time delay relay in the 24-v cir-
cuit has a delay setting as well and it should be set fully clock-
wise to the maximum 1.0 second setting. See Fig. 9.
PHASE REVERSAL PROTECTION — The control moni-
tors the three-phase power sequence supplied at terminals L1,
L2, and L3. If the control senses an incorrect phase relation-
ship, the relay contacts (11/14) on the board will open. The re-
lay contacts will automatically reset when the correct phase se-
quence is applied.
PHASE LOSS AND UNDER-VOLTAGE PROTEC-
TION — If the reverse rotation board senses that any one of
the three phase inputs has no AC voltage or that any one phase
has dropped more than 20% below the voltage dial setting, the
relay contacts (11/14) on the board will open. In addition,
board relay contacts (21/24) will also open. If the contacts do
not close within one second (time delay relay dial setting), the
24-v control power to the chiller will be removed and all motor
outputs will be turned off. Control power will be restored auto-
matically when all three phases are present, in the correct se-
quence and are within the limits of the voltage dial setting.
NOTE: Normal operation of the reverse rotation board (for
example, no faults are detected) results in a closed contact
being applied to the MBB (plug J5A, channel 16B) through the
closed 11/14 relay contact.
Enable-Off-Remote Contact Switch — This switch
is installed in all units and provides the owner and service
person with a local means of enabling or disabling the
machine. It is a 3-position switch used to control the chiller.
When switched to the Enable position the chiller is under its
own control. Move the switch to the Off position to shut the
chiller down. Move the switch to the Remote Contact position
and a field-installed dry contact can be used to start the chiller.
The contacts must be capable of handling a 24-vac, 20-mA
load. In the Enable and Remote Contact (dry contacts closed)
positions, the chiller is allowed to operate and respond to the
scheduling configuration, CCN configuration and set point
control.
Emergency On/Off Switch — This switch is installed
in all units. The Emergency On/Off switch should only be used
when it is required to shut the chiller off immediately. Power
to the MBB, energy management module, and scrolling
marquee display is interrupted when this switch is off and all
outputs from these modules will be turned off.
LED STATUS FUNCTION
Upper (green) LED on
continuously
Relay contacts closed (normal
operation)
Lower (red) LED blinking Relay contacts open (phase rever-
sal has occurred)
Lower (red) LED on
continuously
Relay contacts open (phase loss
or under-voltage has occurred)
Upper (green) LED off Power not present at L1, L2, L3
(off)
Fig. 9 — Time Delay Relay
Fig. 8 — Reverse Rotation Board (RRB)

14
Table 9 — Fan Board 3 (AUX1) Inputs and Outputs
*Controls discharge and liquid line isolation soleniods for 30RB210-300 brine units.
†Low ambient temperature head pressure control output is on AUX1 board only.
NOTE: Fan Board 3 used on 30RB210-300.
Energy Management Module (EMM) — The EMM
is available as a factory-installed option or as a field-installed
accessory. The EMM receives 4 to 20 mA inputs for the
temperature reset, cooling set point reset and demand limit
functions. The EMM also receives the switch inputs for the
field-installed second stage 2-step demand limit and ice done
functions. The EMM communicates the status of all inputs
with the MBB, and the MBB adjusts the control point, capacity
limit, and other functions according to the inputs received. See
Table 10 and Fig. 10.
DESCRIPTION INPUT/OUTPUT I/O TYPE SCROLLING MARQUEE
POINT NAME
CONNECTION POINT
(Unit Size)
Pin Notation
Power (24 vac supply) —— —
FB3-J1
11 24 vac
12 Ground
Local Equipment Network —— —
FB3-J9
+
G
-
+
G
-
Circuit C Discharge
Pressure Transducer DPTC Pressure Transducer (0-5 VDC) PRESSURE
 PRC.C  DP.C FB3-J7-CH13
Circuit C Suction
Pressure Transducer SPTC Pressure Transducer
(0-5 VDC) PRESSURE
 PRC.C  SP.C FB3-J8-CH14
Minimum Load
Value Circuit C MLV-C* TRIAC OUTPUTS
 CIR.C  HGB.C FB3-J3-CH7
(sizes 210-300)
Circuit C Low Ambient
Temperature Head Pressure
Control Speed Signal
(sizes 210-300)
MM-C† 0-10 VDC OUTPUTS
 CIR.C  SPD.C
FB3-CH9
+
-
Outdoor Fan Motor 9 OFM9 TRIAC
FB3-J2-CH2
(sizes 210, 225)
FB3-J2-CH3
(size 250)
Outdoor Fan Motor 10 OFM10 TRIAC
FB3-J2-CH3
(sizes 210, 225)
FB3-J2-CH4
(size 250)
Outdoor Fan Motor 11 OFM11 TRIAC
FB3-J2-CH1
(sizes 210, 225)
FB3-J2-CH2
(size 250)
Outdoor Fan Motor 12 OFM12 TRIAC
FB3-J2-CH3
(sizes 210, 225)
FB3-J2-CH4
(size 250)
Outdoor Fan Motor 13 OFM13 TRIAC
FB3-J2-CH1
(size 250)
FB3-J2-CH2
(size 275)
FB3-J2-CH3
(size 300)
Outdoor Fan Motor 14 OFM14 TRIAC
FB3-J3-CH6
(size 250)
FB3-J2-CH3
(size 275)
FB3-J2-CH4
(size 300)
Outdoor Fan Motor 15 OFM15 TRIAC
FB3-J2-CH1
(size 275)
FB3-J2-CH2
(size 300)
Outdoor Fan Motor 16 OFM16 TRIAC
FB3-J2-CH4
(size 275)
FB3-J3-CH5
(size 300)
Outdoor Fan Motor 17 OFM17 TRIAC FB3-J2-CH1
(size 300)
Outdoor Fan Motor 18 OFM18 TRIAC FB3-J3-CH6
(size 300)

15
Energy Management Module Heat Reclaim
(EMM HR) — The EMM HR is available as a factory-
installed option. The EMM HR communicates the status of all
of the inputs with the MBB. The MBB then determines the ap-
propriate operating mode. Operating modes are: normal cool-
ing, heat reclaim, and simultaneous one circuit cooling/one cir-
cuit heat reclaim. See Table 11 and Fig. 10.
Table 10 — Energy Management Module (EMM) Inputs and Outputs
* 250 ohm, 1/2 watt resistor required for 4-20 mA input.
CAUTION
Care should be taken when interfacing with other manufac-
turer’s control systems due to possible power supply differ-
ences, full wave bridge versus half wave rectification,
which could lead to equipment damage. The two different
power supplies cannot be mixed. ComfortLink™ controls
use half wave rectification. A signal isolation device should
be utilized if incorporating a full wave bridge rectifier sig-
nal generating device is used.
INPUT DESCRIPTION I/O TYPE I/O POINT NAME CONNECTION POINT
4-20 mA or 0-5 vdc Demand Limit 4-20 mA Demand Limit 0-5 vdc* INPUTS
 GEN.I  DMND EMM-J7B-CH6
4-20 mA or 0-5 vdc Temperature Reset/Setpoint 4-20 mA Temperature Reset/
Set point
0-5 vdc* INPUTS
 GEN.I  RSET EMM-J7A-CH5
Demand Limit SW2 Demand Limit Step 2 Switch Input INPUTS
 GEN.I  DLS2 EMM-J4-CH9
Ice Done Ice Done Switch Switch Input INPUTS
 GEN.I  ICE.D EMM-J4-CH11A
Occupancy Override Occupied Schedule Override Switch Input INPUTS
 GEN.I  OCCS EMM-J4-CH8
Remote Lockout Switch Chiller Lockout Switch Input INPUTS
 GEN.I  RLOC EMM-J4-CH10
SPT Space Temperature
Thermistor
10k Thermistor TEMPERATURE
 UNIT  SPT EMM-J6-CH2
OUTPUT DESCRIPTION I/O TYPE I/O POINT NAME CONNECTION POINT
% Total Capacity 0-10 vdc OUTPUTS
 GEN.O  CATO EMM-J8-CH7
RUN R Run Relay Relay OUTPUTS
 GEN.O  RUN EMM-J3-CH24
SHD R Shutdown Relay Relay OUTPUTS
 GEN.O  SHUT EMM-J3-CH25
221
221
221
221
100K
100K
100K
100K
100K
CH
17 CH
17
CH
16
CH
CH
18CH
19 CH
20 CH
22
CH
21 CH
23
24 VAC 12 11
CH 11bCH
12 CH
13CH
14 CH
15 CH
1 CH
2 CH
3CH
4 CH 5 CH 6 CH 7
SIO LEN
+ G - + G -
SIO LEN
J8
J7B
J7A
J6
J5
J4J3J2B
J2A
J1
Fig. 10 — Energy Management Module and Energy Management Heat Reclaim Module
a30-4465

16
Table 11 — Energy Management Module Heat Reclaim (EMM HR) Inputs and Outputs
Local Equipment Network — Information is trans-
mitted between modules via a 3-wire communication bus or
LEN (Local Equipment Network). External connection to the
LEN bus is made at TB3.
Board Addresses — All boards (except the main base
board and the energy management module) have 8-position
DIP switches. Addresses for all boards are listed with the input/
output tables for each board.
Control Module Communication
RED LED — Proper operation of the control boards can be
visually checked by looking at the red status LEDs (light-
emitting diodes). When operating correctly, the red status
LEDs will blink in unison at a rate of once every 2 seconds. If
the red LEDs are not blink in unison, verify that correct power
is being supplied to all modules. Be sure that the main base
board (MBB) is supplied with the current software. If neces-
sary, reload current software. If the problem still persists,
replace the MBB. A red LED that is lit continuously or blink-
ing at a rate of once per second or faster indicates that the board
should be replaced.
GREEN LED — All boards have a green LEN (SIO) LED
which should be blinking whenever power is on. If the LEDs
are not blinking as described check LEN connections for
potential communication errors at the board connectors. See
Input/Output Tables for LEN connector designations. A 3-wire
bus accomplishes communication between modules. These
3 wires run in parallel from module to module. The J9A con-
nector on the MBB provides communication directly to the
scrolling marquee display or the Navigator™ display module.
YELLOW LED — The MBB has one yellow LED. The
Carrier Comfort Network®(CCN) LED will blink during times
of network communication.
Carrier Comfort Network (CCN) Interface — All
30RB units can be connected to the CCN, if desired. The com-
munication bus wiring is a shielded, 3-conductor cable with
drain wire and is field supplied and installed. The system ele-
ments are connected to the communication bus in a daisy chain
arrangement. The positive pin of each system element commu-
nication connector must be wired to the positive pins of the
system elements on either side of it, that is also required for the
negative and signal ground pins of each system element. Wir-
ing connections for CCN should be made at TB3. Consult the
CCN Contractor’s Manual for further information. See Fig. 11.
NOTE: Conductors and drain wire must be 20 AWG (Ameri-
can Wire Gage) minimum stranded, tinned copper. Individual
conductors must be insulated with PVC, PVC/nylon, vinyl,
Teflon, or polyethylene. An aluminum/polyester 100% foil
shield and an outer jacket of PVC, PVC/nylon, chrome vinyl,
or Teflon with a minimum operating temperature range of
–20 C to 60 C is required. See Table 12 for recommended wire
manufacturers and part numbers.
INPUT DESCRIPTION I/O TYPE I/O POINT NAME CONNECTION POINT
PD.B Circuit B Pumpdown Pressure Transducer Pressure Transducer PRESSURE
 CIR.B  PD.B EMM-J8-CH6
PD.A Circuit A Pumpdown Pressure Transducer Pressure Transducer PRESSURE
 CIR.A  PD.A EMM-J8-CH5
HRS.B Circuit B Liquid Subcooling — TEMPERATURE
 CIR.B  HRS.B —
HRS.A Circuit A Liquid Subcooling — TEMPERATURE
 CIR.A  HRS.A —
HRT.B Circuit B Liquid Temperature Temperature TEMPERATURE
 CIR.B  HRT.B EMM-J5-CH4
HRT.A Circuit A Liquid Temperature Temperature TEMPERATURE
 CIR.A  HRT.A EMM-J5-CH3
HEWT Heat Reclaim Entering Fluid Temperature TEMPERATURE
 UNIT  HEWT EMM-J5-CH2
HLWT Heat Reclaim Leaving Fluid Temperature TEMPERATURE
 UNIT  HLWT EMM-J5-CH1
C.FLO Condenser Flow Switch Status Switch INPUTS
 GEN.I  C.FLO EMM-J5-CH15
—Power (24 vac supply) — — EMM-J1-CH11,12
—Local Equipment Network — — EMM-J9
OUTPUT DESCRIPTION I/O TYPE I/O POINT NAME CONNECTION POINT
Condenser 0-10 VDC Water Valve Output 0-10 VDC — EMM-J8-CH7
CND.P Heat Reclaim Condenser Pump Status Contactor OUTPUTS
 GEN.O  CND.P EMM-J2-CH16
CN.HT Heat Reclaim Condenser Heater Contactor OUTPUTS
 GEN.O  CN.HT EMM-J2-CH17
HR2.A Circuit A, Leaving Air-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.A  HR2.A EMM-J2-CH18
HR2.B Circuit B, Leaving Air-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.B  HR2.B EMM-J2-CH19
HR3.A Circuit A, Entering Water-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.A  HR3.A EMM-J2-CH20
HR3.B Circuit B, Entering Water-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.B  HR3.B EMM-J2-CH21
HR4.A Circuit A, Leaving Water-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.A  HR4.A EMM-J2-CH22
HR4.B Circuit B, Leaving Water-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.B  HR4.B EMM-J2-CH23
HR1.A Circuit A, Entering Air-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.A  HR1.A EMM-J3-CH24
HR1.B Circuit B, Entering Air-Cooled Cond Solenoid Contactor OUTPUTS
 CIR.B  HR1.B EMM-J3-CH25
Fig. 11 — ComfortLink™ CCN Communication Wiring

17
Table 12 — CCN Communication Bus Wiring
It is important when connecting to a CCN communication
bus that a color-coding scheme be used for the entire network
to simplify the installation. It is recommended that red be used
for the signal positive, black for the signal negative, and white
for the signal ground. Use a similar scheme for cables contain-
ing different colored wires.
At each system element, the shields of its communication
bus cables must be tied together. If the communication bus is
entirely within one building, the resulting continuous shield
must be connected to a ground at one point only. If the commu-
nication bus cable exits from one building and enters another,
the shields must be connected to grounds at the lightning
suppressor in each building where the cable enters or exits the
building (one point per building only). To connect the unit to
the network:
1. Turn off power to the control box.
2. Cut the CCN wire and strip the ends of the red (+), white
(ground), and black (–) conductors. (Substitute appropri-
ate colors for different colored cables.)
3. Connect the red wire to (+) terminal on TB3 of the plug,
the white wire to COM terminal, and the black wire to the
(–) terminal.
4. The RJ14 CCN connector on TB3 can also be used, but is
only intended for temporary connection (for example, a
laptop computer running Service Tool).
Configuration Options
MINIMUM LOAD CONTROL (Configuration  UNIT
 HGBP) reduces the capacity of the 30RB chiller below the
lowest standard capacity step by use of hot gas bypass. This
capacity step reduction provides more precise control of the
leaving water temperature. The minimum load valve acces-
sory cannot be used on units configured for brine as the
cooler fluid type (Configuration→SERV→FLUD).
Minimum Load Control can be configured in three different
ways. If Minimum Load Control is not used, HGBP must be
set to 0. If HGBP is set to 1, the control will activate the mini-
mum load control valve when the machine is started only. This
will be the first step of capacity. If HGBP is set to 2, all stages
of capacity can utilize the minimum load control valve. If
HGBP is set to 3, the minimum load control valve will be used
only when the circuit has a high pressure override active. This
will reduce the capacity of the circuit.
RAMP LOADING (Configuration
 OPTN  RL.S) limits
the rate of change of leaving fluid temperature. If the unit is in
a Cooling mode and configured for Ramp Loading, the control
makes 2 comparisons before deciding to change stages of
capacity. The control calculates a temperature difference
between the control point and leaving fluid temperature. If the
difference is greater than 4° F (2.2° C) and the rate of change
(°F or °C per minute) is more than the configured Cool Ramp
Loading (Setpoints
 COOL  CRMP), the control does not
allow any changes to the current stage of capacity.
MINUTES OFF TIME (Configuration
 OPTN  DELY) is
a time delay added to the start when the machine is com-
manded ON. This is a field configurable item from 1 to
15 minutes. The factory default is 1 minute. This feature is
useful when multiple units are installed. Staggering the start
will reduce the inrush potential.
Dual Chiller Control — The dual chiller routine is
available for the control of two parallel units supplying chilled
fluid on a common loop. This control is designed for a parallel
fluid flow arrangement only. One chiller must be configured as
the master chiller, the other as the slave chiller. An additional
leaving fluid temperature thermistor (Dual Chiller LWT) must
be installed in the common chilled water piping as described in
the Installation Instructions for both the master and slave
chillers. See the Field Wiring section in the 30RB Installation
Instructions for dual chiller LWT sensor control wiring. A
chilled water flow switch is factory-installed for each chiller.
Parallel chiller control with dedicated pumps is recom-
mended. Chiller must start and stop its own water pump locat-
ed on its own piping. If pumps are not dedicated for each
chiller, chiller isolation valves are required: each chiller must
open and close its own isolation valve through the control
(valve shall be connected to the pump outputs). Pump Control
is enabled as described in the Cooler Pump Control section on
page 31. One additional parameter is set for the dual chiller
control. Lag Unit Pump Select (Configuration
 RSET
 LAGP) allows the user to configure the control to energize
the pump for the lag chiller once the unit enters an occupied
time period or delay the control until the lag chiller is started. It
is recommended that this parameter be set to 0, OFF IF UNIT
STOPPED.
The control of the slave chiller is directed through com-
mands emitted by the master chiller. The slave chiller has no
action in master/slave operations it shall only verify that CCN
communication with its master is present. See the Dual Chiller
Sequence of Operation section on page 45.
Use dual chiller control to designate a lead chiller between
the master and slave chiller. Configure the Lead/Lag Balance
Select (Configuration
 RSET  LLBL)to ENBL to base the
selection on the Lead/Lag Balance Delta (Configuration
 RSET  LLBD) between the master and slave run hours. If
the run hour difference between the master and the slave
remains less than LLBD, the chiller designated as the lead will
remain the lead chiller. The Lead/Lag changeover between the
master and the slave chiller due to hour balance will occur dur-
ing chiller operating odd days, such as day 1, day 3, and day 5
of the month, at 12:00 a.m. If a lead chiller is not designated,
the master chiller will always be designated the lead chiller.
The dual chiller control algorithm has the ability to delay
the start of the lag chiller in two ways. The Lead Pulldown
Time (Configuration
 RSET  LPUL) provides a field con-
figurable time delay of 0 to 60 minutes. This time delay gives
the lead chiller a chance to remove the heat that the chilled wa-
ter loop picked up while being inactive during an unoccupied
period. The Lead Pulldown Time parameter is a one-time time
delay initiated after starting the lead chiller, manually or by a
schedule, before checking whether to start an additional chiller.
This routine provides the lead chiller an opportunity to pull
down the loop temperature before starting another chiller. The
second time delay, Lead/Lag Delay (Configuration
 RSET  LLDY) is a time delay imposed between the last
stage of the lead chiller and the start of the lag chiller. This pre-
vents enabling the lag chiller until the lead/lag delay timer has
expired. See Tables 13 and 14.
MANUFACTURER PART N UMBER
Regular Wiring Plenum Wiring
Alpha 1895 —
American A21451 A48301
Belden 8205 884421
Columbia D6451 —
Manhattan M13402 M64430
Quabik 6130 —
IMPORTANT: A shorted CCN bus cable will prevent
some routines from running and may prevent the unit
from starting. If abnormal conditions occur, discon-
nect the CCN bus. If conditions return to normal,
check the CCN connector and cable. Run new cable if
necessary. A short in one section of the bus can cause
problems with all system elements on the bus.

18
Table 13 — Configuring the Master Chiller
NOTE: Bold values indicate sub-mode level.
MODE KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENT
CONFIGURATION DISP
UNIT
SERV
OPTN
CCNA CCN Address Confirm address of chiller. The master and slave chiller
must have different addresses.
1 Factory default address is 1.
CCNA
CCNB CCN Bus Number Confirm the bus number of the chiller. The master and slave
chiller must be on the same bus.
0 Factory default is 0.
CCNB
OPTN
RSET Reset Cool and Heat Tmp
CRST Cooling Reset Type
x 5 MSSL Master/Slave Select
0Disable
0 Disable Flashing to indicate Edit mode. May require Password.
1 Master Use up arrows to change value to 1.
1 Accepts the change.
MSSL
SLVA Slave Address
1
1 Flashing to indicate Edit mode.
2Use up arrows to change value to 2. This address must
match the address of the slave chiller.
2 Accepts the change.
SLVA
LLBL Lead/Lag Balance Select
ENBL Factory Default is ENBL
LLBL
LLBD Lead/Lag Balance Delta
168 Factory Default is 168.
LLBD
LLDY Lead/Lag Start Delay
10 Factory Default is 10.
LLDY
LAGP Lag Unit Pump Select
0 Off if U Stp Factory Default is 0, Off if unit is stopped. Master and slave
chiller must be configured to the same value.
LAGP
LPUL Lead Pulldown Time
0 Factory Default is 0.
At mode level.
OPERATING
MODES OPER Operating Control Type
0 Switch Control Master chiller should be configured for job requirements,
Switch Control, Time Schedule, or CCN.
At mode level.
ENTER
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ENTER
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ESCAPE
ENTER
ESCAPE
ESCAPE
ENTER
ENTER
ESCAPE

19
Table 14 — Configuring the Slave Chiller
NOTE: Bold values indicate sub-mode level.
MODE KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENT
CONFIGURATION DISP
UNIT
SERV
OPTN
CCNA CCN Address Confirm address of chiller. The master and slave chiller
must have different addresses.
1 Factory default address is 1. The slave chiller address
must match what was programmed in the Master Chiller
SLVA item.
1 Flashing to indicate Edit Mode.
2 This item must match Master Chiller SLVA item.
2 Accepts the change.
CCNA
CCNB CCN Bus Number Confirm the bus number of the chiller. The master and
slave chiller must be on the same bus.
0 Factory default bus number is 0.
CCNB
OPTN
RSET Reset Cool and Heat Tmp
CRST Cooling Reset Type
x 5 MSSL Master/Slave Select
0Disable
0 Disable Flashing to indicate Edit mode. May require Password
2 Slave Use up arrows to change value to 2.
2 Accepts the change.
MSSL
SLVA Slave Address Not required.
LLBL Lead/Lag Balance Select Not required.
LLBD Lead/Lag Balance Delta Not required.
LLDY Lead/Lag Start Delay Not required.
LAGP Lag Unit Pump Select Must be configured to the same value as the master
chiller.
LPUL Lead Pulldown Time Not required.
At mode level
OPERATING MODES OPER Operating Control Type
0 Switch Control
0 Flashing to indicate Edit Mode.
2 CCN Control Use up arrows to change value to 2.
NOTE: Slave chiller must be configured for CCN.
2 Accepts the value.
OPER
At mode level
ENTER
ENTER
ENTER
ENTER
ENTER
ESCAPE
ENTER
ESCAPE
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ESCAPE
ESCAPE
ENTER
ENTER
ENTER
ENTER
ESCAPE
ESCAPE

20
The Lag Unit Pump Select configuration must be set
consistently. If pump control is NOT being used, set Con-
figuration
 RSET  LAGP to 1. If pump control IS being
used, set Configuration
 RSET  LAGP to 0, which is the
default value. This must be set in both the master and slave
chillers, and it must be consistent in both.
Capacity Control — The control system cycles com-
pressors and minimum load valve solenoids (if equipped) to
maintain the user-configured leaving chilled fluid temperature
set point. Entering fluid temperature is used by the main base
board (MBB) to determine the temperature drop across the
cooler and is used in determining the optimum time to add or
subtract capacity stages. Entering fluid temperature, space
temperature (requires additional sensor), or outdoor-air temper-
ature reset features can automatically reset the leaving chilled
fluid temperature set point. It can also be reset from an external
4 to 20-mA signal (requires energy management module).
The control has an automatic lead-lag feature built in for
circuit and compressor starts. If enabled, the control will deter-
mine which circuit (Configuration
 OPTN  LLCS=0) and
compressor to start to even the wear. The compressor wear
factor (combination of starts and run hours) is used to deter-
mine which compressor starts.
Compressor Wear Factor = (Compressor Starts) + 0.1
(Compressor Run Hours)
In this case, the circuit with the lowest average compressor
wear factor (the average of the wear factors of all available
compressors in the circuit) is the circuit that starts first. The
compressor within the circuit with the lowest wear factor is the
first to start. If the automatic lead-lag function for the circuit is
not enabled [Configuration
 OPTN  LLCS=1(Circuit A
leads), 2 (Circuit B leads), or 3(Circuit C leads)], then the se-
lected circuit will be the first to start. Again, the compressor
with the lowest wear factor within the circuit will be the first to
start. If Minimum Load Control is enabled (Configuration

UNIT  HGBP=1), the valve will be operational only during
the first stage of cooling.
Once the lead compressor has been started, the lag compres-
sors will be determined by the wear factor and loading
sequence selected. If equal loading is selected, (Configura-
tion
 OPTN  LOAD=0), the circuit with the lowest average
wear factor for the available compressors will start next, with
the compressor with the lowest wear factor starting. The con-
trol will attempt to keep all circuits at approximately the same
number of compressors ON. For this option to function proper-
ly, all circuits must have the same number of compressors
available. If a circuit compressor is not available due to an
alarm condition or demand limit, the capacity staging will
change to staged. If staged loading is selected, (Configura-
tion
 OPTN  LOAD=1), the started circuit will continue to
turn on compressors according to the lowest wear factor until
all are on, then start the next circuit with the lowest average
wear factor. If Minimum Load Control is enabled for close
control (Configuration
 UNIT  HGBP=2), the valve will be
available at all stages for better temperature control. If
Minimum Load Control is enabled for high ambient control
(Configuration
 UNIT  HGBP=3), the valve will be used
only when a high pressure override is active for that circuit.
The electronic expansion valves provide a controlled start-
up. During start-up, the low pressure logic in the lead circuit
will be ignored for 5 minutes to allow for the transient changes
during start-up. As additional stages of compression are
required, the processor control will add them. The following
example is based on a 30RB225 machine, which has three
25-ton compressors in each circuit. See Table 15.
Each example below has different configurations and is
intended to illustrate the loading sequences possible for normal
operation.
In Example 1 (Table 16), assume the following configurations
are in place:
Configuration
 UNIT  HGBP=1. . Minimum Load Control
installed and enabled for Start-Up Only
Configuration
 OPTN  LOAD=0. . . .Equal Circuit Loading
Configuration
 OPTN  LLCS=0. .Automatic Circuit Select
Since Circuit A has the lowest average wear factor, it will be
the lead circuit. Within the circuit, compressor A3 has the
lowest wear factor and will start first with Minimum Load
Control ON. The next stage will turn OFF the minimum load
control. Stage 3 will start another circuit because of the Equal
Circuit Loading configuration. The next circuit with the lowest
wear factor is Circuit B, and the compressor with the lowest
wear factor is B2. The next stage will be a circuit C compres-
sor. The process continues until all compressors are ON. See
Table 16.
In Example 2 (Table 17), assume the compressor starts and
run hours are the same as in the previous example and the
following configurations are in place:
Configuration
 UNIT  HGBP=1. . Minimum Load Control
installed and enabled for Start-Up Only
Configuration
 OPTN  LOAD=1. . . Staged Circuit Loading
Configuration
 OPTN  LLCS=0. .Automatic Circuit Select
Since Circuit A has the lowest average wear factor, it will be
the lead circuit. Within the circuit, compressor A3 has the
lowest wear factor and will start first with Minimum Load
Control ON. The next stage will turn OFF the minimum load
control. Stage 3 will start a compressor in the same circuit be-
cause of the Staged Circuit Loading configuration. Compressor
A2 has the next lowest wear factor and will be started next.
Compressor A3 will be next to start. Since all compressors in
Circuit A are ON, the next stage will start another circuit. Of
the remaining circuits, Circuit B has the lowest wear factor, and
the compressor with the lowest wear factor is B2. All of the
Circuit B compressors will be started in the same manner as
Circuit A. Once all Circuit B compressors are ON, then Circuit
C will be started. The process continues until all compressors
are ON. See Table 17.
Table 15 — Compressor Starts and Run Hours
COMPRESSOR STARTS RUN HOURS WEAR FACTOR CIRCUIT AVERAGE
WEAR FACTOR
A1 25 249 49.9
44.8A2 22 237 45.7
A3 26 128 38.8
B1 41 453 86.3
67.6B2 38 138 51.8
B3 35 297 64.7
C1 93 103 103.3
80.3C2 57 98 66.8
C3 61 99 70.9