4
The CCN 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 this manual.
BASIC CONTROL USAGE
Comfort
Link Controls —
The
Comfort
Link control
system is a comprehensive unit-management system. The con-
trol system is easy to access, configure, diagnose and trouble-
shoot.
The control is flexible, providing two types of constant
volume cooling control sequences, two variable air volume
cooling control sequences, and heating control sequences for
two-stage electric and gas systems, and for multiple-stage gas
heating, in both occupied and unoccupied schedule modes.
This control also manages:
• VAV duct pressure (through optional VFD), with reset
• Building pressure through two different power exhaust
schemes
• Condenser fan cycling for mild ambient head pressure
control
• Space ventilation control, in occupied and unoccupied
periods, using CO
2
sensors or external signals, with ven-
tilation defined by damper position
• Smoke control functions
• Occupancy schedules
• Occupancy or start/stop sequences based on third party
signals
• Alarm status and history and run time data
• Management of a complete unit service test sequence
• Dehumidification (with optional reheat) and humidifier
sequences
System diagnostics are enhanced by the use of multiple
external sensors for air temperatures, air pressures, refrigerant
temperatures, and refrigerant pressures. Unit-mounted actua-
tors provide digital feedback data to the unit control.
The
Comfort
Link control system is fully communicating
and cable-ready for connection to the Carrier Comfort Net-
work
®
(CCN) building management system. The control pro-
vides high-speed communications for remote monitoring via
the Internet. Multiple units can be linked together (and to other
Comfort
Link control equipped units) using a 3-wire communi-
cation bus.
The
Comfort
Link control system is easy to access through
the use of a unit-mounted display module. There is no need to
bring a separate computer to this unit for start-up. Access to
control menus is simplified by the ability to quickly select from
11 menus. A scrolling readout provides detailed explanations
of control information. Only four, large, easy-to-use buttons are
required to maneuver through the entire controls menu.
For added service flexibility, an accessory hand-held
Navigator module is also available. This portable device has an
extended communication cable that can be plugged into the
unit’s communication network either at the main control box or
at the opposite end of the unit, at a remote modular plug. The
Navigator display provides the same menu structure, control
access and display data as is available at the unit-mounted
scrolling marquee display.
Scrolling Marquee —
This device is the standard inter-
face used to access the control information, read sensor values,
and test the unit. The scrolling marquee is located in the main
control box. The scrolling marquee display is a 4-key, 4-char-
acter LED (light-emitting diode) display module. The display
also contains an Alarm Status LED. See Fig. 1. The display is
easy to operate using 4 buttons and a group of 11 LEDs that
indicate the following menu structures, referred to as modes
(see Appendix A):
• Run Status
• Service Test
• Temperatures
• Pressures
• Setpoints
• Inputs
• Outputs
• Configuration
• Time Clock
• Operating Modes
• Alarms
Through the scrolling marquee, the user can access all of the
inputs and outputs to check on their values and status, config-
ure operating parameters plus evaluate the current decision sta-
tus for operating modes. Because the A Series units are
equipped with suction pressure and saturated condensing
temperature transducers, the scrolling marquee can also display
refrigerant circuit pressures typically obtained from service
gages. The control also includes an alarm history which can be
accessed from the display. In addition, through the scrolling
marquee, the user can access a built-in test routine that can be
used at start-up commissioning to diagnose operational
problems with the unit.
Accessory Navigator™ Display —
The accessory
hand-held Navigator display can be used with the A Series
units. See Fig. 2. The Navigator display operates the same way
as the scrolling marquee device. The Navigator display is
plugged into the RJ-14 (LEN) jack in the main control box on
the COMM board. The Navigator display can also be plugged
into the RJ-14 jack located on the ECB (economizer control
board) located in the auxiliary control box.
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
Alarm Status
ENTER
MODE
ESCAPE
Fig. 1 — Scrolling Marquee
A30-2239
R
u
n
S
t
a
t
us
S
ervice
Te
s
t
Temper
a
t
u
re
s
Pre
ssu
re
s
S
etpoin
t
s
Inp
u
t
s
O
u
tp
u
t
s
Config
u
r
a
tion
Time Clo
ck
Oper
a
ting M
ode
s
Al
a
rm
s
E NTE
R
E
S
C
M O D
E
Al
a
rm
S
t
a
t
us
TIME
EWT
LWT
S
ETP
1 2 . 5
8
5 4 . 6
F
4 4 . 1
F
4 4 . 0
F
N A V
I G A
T O R
Co m
f o r t
Li n k
Fig. 2 — Accessory Navigator Display
30-650
Содержание Carrier Weathermaker 48A2
Страница 105: ...105 Fig 20 Typical Main Control Box Wiring Schematic 48 50A2 A3 A4 A5 Units...
Страница 106: ...106 Fig 21 Typical Auxiliary Control Box Wiring Schematic...
Страница 107: ...107 Fig 22 Typical 2 Stage Gas Heat Wiring Schematic Size 060 Units Shown a48 8357...
Страница 108: ...108 TO NEXT PAGE Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown A48 7296...
Страница 109: ...109 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown cont A48 8358...
Страница 110: ...110 Fig 24 Typical Electric Heat Control Schematic 50 Series Size 060 Units Shown a50 8228...
Страница 111: ...111 Fig 25 Typical Power Schematic 48 50A2 A3 A4 A5 060 Unit Shown...
Страница 112: ...112 Fig 26 Typical Low Ambient Controls Option Wiring...
Страница 113: ...113 Fig 27 Typical Small Chassis Component Location Size 020 035 Units...
Страница 114: ...114 Fig 28 Typical Large Chassis Component Locations Size 040 060 Units...
Страница 118: ...118 Fig 30 Economizer Control Board ECB1 and VAV Control Board ECB2 A48 7706...
Страница 142: ...142 A48 3733 Fig 56 Main Burner Removal...
Страница 176: ...176 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716...
