General; Conventions Used In This Manual - Carrier Weathermaster 48P030-100 Controls, Start-Up, Operation, Service, And Troubleshooting

GENERAL

This book contains Start-Up, Controls, Operation, Troubleshoot-
ing and Service information for the 48/50P Series rooftop units.
See Table 1. These units are equipped with ComfortLink controls
version 9.X or higher. Use this guide in conjunction with the sepa-
rate installation instructions packaged with the unit. Refer to the
Wiring Diagrams literature for more detailed wiring information.
The 48/50P Series units provide ventilation, cooling, and heating
(when equipped) in variable air volume (VAV) and constant vol-
ume (CV) applications.
Table 1 — P Series Product Line
UNIT SIZE
Gas Heat
48P2 All Vertical Supply/Return
CV ComfortLink Controls
Gas Heat
48P3 All Vertical Supply/Return
VAV ComfortLink Controls
Gas Heat
48P4 All Horizontal Supply/Return
CV ComfortLink Controls
Gas Heat
48P5 All Horizontal Supply/Return
VAV ComfortLink Controls
Optional Electric Heat
50P2 All Vertical Supply/Return
CV ComfortLink Controls
Optional Electric Heat
50P3 All Vertical Supply/Return
VAV ComfortLink Controls
Optional Electric Heat
50P4 All Horizontal Supply/Return
CV ComfortLink Controls
Optional Electric Heat
50P5 All Horizontal Supply/Return
VAV ComfortLink Controls
Gas Heat
Vertical Supply/Return
48P6 All
CV ComfortLink Controls
Greenspeed Outdoor Fan Control
Gas Heat
Vertical Supply/Return
48P7 All
VAV ComfortLink Controls
Greenspeed Outdoor Fan Control
Gas Heat
Horizontal Supply/Return
48P8 All
CV ComfortLink Controls
Greenspeed Outdoor Fan Control
Gas Heat
Horizontal Supply/Return
48P9 All
VAV ComfortLink Controls
Greenspeed Outdoor Fan Control
Optional Electric Heat
Vertical Supply/Return
50P6 All
CV ComfortLink Controls
Greenspeed Outdoor Fan Control
Optional Electric Heat
Vertical Supply/Return
50P7 All
VAV ComfortLink Controls
Greenspeed Outdoor Fan Control
Optional Electric Heat
Horizontal Supply/Return
50P8 All
CV ComfortLink Controls
Greenspeed Outdoor Fan Control
Optional Electric Heat
Horizontal Supply/Return
50P9 All
VAV ComfortLink Controls
Greenspeed Outdoor Fan Control
LEGEND
CV — Constant Volume
VAV — Variable Air Volume
APPLICATION
The 48/50P units contain the factory-installed ComfortLink con-
trol system which provides full system management. The main
base board (MBB) stores hundreds of unit configuration settings
and 8 time of day schedules. The MBB also performs self-diag-
nostic tests at unit start-up, monitors the operation of the unit, and
provides alarms and alert information. The system also contains
other optional boards that are connected to the MBB through the
Local Equipment Network (LEN). Information on system opera-
tion and status is sent to the MBB processor by various sensors
and the optional board located at the unit and in the conditioned
space. Access to the unit controls for configuration, set point se-
lection, schedule creation, and service can be done through a unit-
mounted scrolling marquee. Access can also be done through the
Carrier Comfort Network
ware, Network Service Tool, or the accessory Navigator™ device.
The ComfortLink system controls all aspects of the rooftop. It con-
trols the supply-fan motor, compressors, and economizers to
maintain the proper temperature conditions. The controls also cy-
cle condenser fans to maintain suitable head pressure. All VAV
units are equipped with a VFD (variable frequency drive) for sup-
ply duct pressure control. The ComfortLink controls can directly
control the speed of the VFD based on a static pressure sensor in-
put. In addition, the ComfortLink controls can adjust (but not con-
trol on CV and non-modulating power exhaust units) the building
pressure using multiple power exhaust fans controlled from damp-
er position or from a building pressure sensor. The control safeties
are continuously monitored to prevent the unit from operating un-
der abnormal conditions. Sensors include pressure transducers and
thermistors.
A scheduling function, programmed by the user, controls the unit
occupied/unoccupied schedule. Up to 8 different schedules can be
programmed.
The controls also allow the service person to operate a service test
so that all the controlled components can be checked for proper
operation.

Conventions Used in This Manual

This manual will use the following conventions for discussing
configuration points for the local display (scrolling marquee or
Navigator™ accessory).
Parameter names will be written with the Mode name first, then
any submodes, then the parameter name, each separated by an ar-
row symbol (). Names will also be shown in bold and italics. As
an example, the IAQ Economizer Override Position which is lo-
cated in the Configuration mode, Indoor Air Quality Configura-
tion sub-mode, and the Air Quality Set Points sub-sub-mode,
would be written as Configuration
This path name will show the user how to navigate through the lo-
cal display structure to reach the desired configuration. The user
would scroll through the modes and submodes 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.A.C = 1 (IAQ Analog Input).
Pressing the ESCAPE and ENTER keys simultaneously will
scroll an expanded text description of the parameter name 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 point names are also cross-referenced in the local dis-
play tables (Appendix A) for users configuring the unit with CCN
software instead of the local display. The CCN tables are located
in Appendix B of this manual.
4
® (CCN) using ComfortVIEW™ soft-
  
IAQ IAQ.SP IQ.O.P.
 