4
Conventions Used in This Manual
This manual will use the following conventions for discussing
configuration points for the local display (Navigator™).
Parameter names will be written with the Mode name first,
then any sub-modes, then the parameter name, each separated
by an arrow symbol (
). Names will also be shown in bold
and italics. As an example, the IAQ Economizer Override Po
-
sition which is located in the Configuration mode, Indoor Air
Quality Configuration sub-mode, and the Air Quality Set
Points sub-sub-mode, would be written as
Configuration
IAQ
IAQ.SP
IQ.O.P
.
This path name will show the user how to navigate through the
local display structure to reach the desired configuration. The
user would scroll through the modes and sub-modes using the
UP ARROW and DOWN ARROW keys. The arrow symbol in
the path name represents pressing ENTER 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 rep
-
resents a configuration setting, an explanation will be shown in pa
-
rentheses after the value. As an example,
Configuration
IAQ
AQ.CF
IQ.AC
= 1 (IAQ Analog Input).
Pressing the ESCAPE and ENTER keys simultaneously will
display an expanded text description of the parameter name.
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
cross-referenced in the local display tables (Appendix A) for
user interface with the unit via CCN 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 controls are a comprehensive unit-manage
-
ment system. The control system is easy to access, configure,
diagnose, and troubleshoot.
The controls are flexible, providing constant volume and vari
-
able air volume cooling control sequences, and heating control
sequences for 2-stage electric and gas systems, modulating gas
heating, SCR (silicon control rectifier) electric heat, and hy
-
dronic heat in both Occupied and Unoccupied schedule modes.
This control also manages:
• VAV duct pressure (VAV units only) with configurable
static pressure reset
• Building pressure through 4 different power exhaust
schemes
• Return fan applications using fan tracking
• Condenser fan head pressure control
• Dehumidification (with optional reheat) and humidifier se
-
quences
• Space ventilation control, in Occupied and Unoccupied pe
-
riods, using CO
2
sensors or external signals, with ventila
-
tion defined by damper position or ventilation airflow
measurement
• 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
• Economizer operation and Fault Diagnosis and Detection
(FDD) per California Energy Commission Title 24-2013.
System diagnostics are enhanced by the use of sensors for air
and refrigerant temperatures and pressures. Unit-mounted actu
-
ators provide digital feedback data to the unit control.
The
Comfort
Link controller is cable-ready for connection to
the Carrier Comfort Network
®
(CCN) building management
system. The control provides high-speed communications for
remote monitoring. Multiple 48/50N Series units can be linked
together (and to other
Comfort
Link controller equipped units)
using a 3-wire communication bus. The unit may be equipped
with optional BACnet communication capability.
The
Comfort
Link controller is also capable of communicating
with a BACnet network by going through a UPC Open control
-
ler. This permits third-party building management systems to
provide remote monitoring and control of 48/50N units. See
Appendix F for additional information.
The
Comfort
Link control system is easy to access through the
use of a Navigator™ display. A computer is not needed to per
-
form unit start-up. The Navigator module provides detailed ex
-
planations of control information.
For service flexibility, a factory-supplied Navigator™ module
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 menu structure, control ac
-
cess and display data for the unit.
Navigator™ Display
The hand-held Navigator display is used with the 48/50N Se
-
ries units. See Fig. 1. The Navigator display is plugged into the
RJ-14 jack in the main control box on the COMM board. The
Navigator display can also be plugged into the RJ-14 jack lo
-
cated on the unit corner post located at the economizer end of
the unit.
Fig. 1 —
Accessory Navigator Display
Operation
All units are shipped from the factory with the Navigator dis
-
play, which is located in the main control box. See Fig. 1. The
Navigator display provides the user with an interface to the
Comfort
Link control system. The display has arrow keys, an
ESC key, and an ENTER key. These keys are used to navigate
through the different levels of the display structure. The Navi
-
gator has 4 lines of display. See Table 2 for the menu structure.
The 4 keys are used to navigate through the display structure,
which is organized in a tiered mode structure. See Table 2 for the
first 2 levels of the mode structure. If the buttons have not been
used for a period, the display will default to the AUTO VIEW
display category as shown under the RUN STATUS category. To
Run Sta
tus
Service
Test
Tempe
rature
s
Pres
sures
Setpoin
ts
Inputs
Outputs
Config
uration
Time C
lock
Operati
ng Mod
es
Alarm
s
E NTE
R
E S C
M O D
E
Alarm
Sta
tus
TIME
EWT
LWT
SETP
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
Содержание WeatherExpert 48N2
Страница 135: ...135 Fig 18 48 50N Typical Power Schematic Nominal 075 Ton Unit Shown ...
Страница 136: ...136 Fig 19 48 50N Typical Power Schematic Nominal Ton 90 150 Units Shown ...
Страница 137: ...137 Fig 20 48 50N Main Base Board Input Output Connections ...
Страница 138: ...138 Fig 21 48 50N RXB EXB CEM Input Output Connections a48 9307 ...
Страница 139: ...139 Fig 22 48 50N EXV SCB Input Output Connections a48 9308 ...
Страница 140: ...140 Fig 23 48N Typical Modulating Gas Heat Unit Control Wiring ...
Страница 141: ...141 Fig 24 50N Typical Electric Heat Unit Control Wiring ...
Страница 144: ...144 Fig 27 48N Typical Gas Heat Section Wiring Nominal Ton 120 to 150 Units ...
Страница 145: ...145 Fig 28 48 50N Typical Power Component Control Wiring 460 v ...
Страница 146: ...146 Fig 29 48 50N Component Control Wiring 575 v Nominal Ton 075 to 150 Units ...
Страница 147: ...147 Fig 30 48 50N Component Arrangement Power Box ...
Страница 148: ...148 Fig 31 48 50N Component Arrangement Control Box ...
Страница 168: ...168 Fig 47 Sensor and Ignition Position Fig 48 Combustion Blower Details SENSOR DETAILS IGNITION DETAILS ...
Страница 240: ...240 APPENDIX D VFD INFORMATION CONT Fig G VFD Bypass Wiring Diagram WHEN USED ...