Premierlink™ Controller; Rtu Open Control System; Sensor/Accessory Installation - Carrier WeatherMaster 50HCQ04-12 Service And Maintenance Instructions

CONTROLLER'S POWER LED IS OFF
1. Make sure the circuit supplying power to the controller is
operational. If not, make sure JP2 and JP3 are set correctly
on the controller before applying power.
2. Verify that power is applied to the controller's supply
input terminals. If power is not present, replace or repair
wiring as required.
REMOTE TEST/RESET STATION'S TROUBLE LED DOES
NOT FLASH WHEN PERFORMING A DIRTY TEST, BUT
THE CONTROLLER'S TROUBLE LED DOES
1. Verify that the remote test/station is wired as shown in Fig.
55. Repair or replace loose or missing wiring.
2. Configure the sensor dirty test to activate the controller's
supervision relay. See "Changing sensor dirty test operation."
SENSOR'S TROUBLE LED IS ON, BUT THE CONTROL-
LER'S TROUBLE LED IS OFF
Remove JP1 on the controller.
SUPPLY AIR TEMPERATURE (SAT) SENSOR
On FIOP-equipped 50HCQ units, the unit is supplied with a
supply-air temperature (SAT) sensor (P/N 33ZCSENSAT).
This sensor is a tubular probe type, approx. 6 in. (12.7 mm) in
length. It is a nominal 10k-ohm thermistor. See "PremierLink
Installation, Start-Up and Configuration Instructions" for tem-
perature-resistance characteristics.
PREMIERLINK™ CONTROL
The PremierLink controller (see Fig. 58) is compatible with
Carrier Comfort Network ®
signed to allow users the access and ability to change factory-
defined settings, thus expanding the function of the standard
unit control board. CCN service access tools include System
Pilot™, Touch Pilot™ and Service Tool. Standard tier display
tools Navigator™ and Scrolling Marquee are not suitable for
use with the latest PremierLink controller (Version 2.x).
The PremierLink controller is factory-mounted in the unit's
main control box to the left of the LCTB. Factory wiring is
completed through harnesses connected to the LCTB thermo-
stat. Field connections are made at a 16-pole terminal block
(TB1) located on the bottom shelf of the unit control box in
front of the PremierLink controller. The factory-installed Pre-
mierLink control includes the supply-air temperature (SAT)
sensor. The outdoor air temperature (OAT) sensor is included
in the FIOP/accessory EconoMi$er 2 package.
Refer to Fig. 58 for PremierLink connection locations.
NOTE: Refer to PremierLink™ Installation, Start-Up and Config-
uration Instructions. Have a copy of this manual available at unit
start-up.
(CCN) devices. This control is de-

RTU OPEN CONTROL SYSTEM

The RTU Open controller is an integrated component of the
Carrier rooftop unit. Its internal application programming pro-
vides optimum performance and energy efficiency. RTU Open
enables the unit to run in 100% stand-alone control mode, Car-
rier's i-Vu Open network, or a Third Party Building Automa-
®
tion System (BAS). On-board DIP switches allow you to select
your protocol (and baud rate) of choice among the four most
popular protocols in use today: BACnet
N2 and LonWorks 3 . See Fig. 59.
Carrier's diagnostic display tools such as Field Assistant
BACview6 Handheld or Virtual BACview
the RTU Open controller. Access is available via a 5-pin J12
access port.
The RTU-Open control is factory-mounted in the unit's main
control box, to the left of the Light Commercial Terminal
Board (LCTB). Factory wiring is completed through harnesses
connected to the LCTB. Field connections for RTU Open sen-
sors will be made at the Phoenix connectors on the RTU Open
board. The factory-installed RTU Open control includes the
supply-air temperature (SAT) sensor. The outdoor air tempera-
ture (OAT) sensor is included in the FIOP/accessory
EconoMi$er2 package.

Sensor/Accessory Installation

™
A variety of sensors and accessories are available for the RTU
Open Controller. Some of these can be factory or field in-
stalled, while others are only field installable. The RTU Open
controller may also require connection to a building network
system or building zoning system. All field control wiring that
connects to the RTU Open Controller must be routed through
the raceway built into the corner post of the unit or secured to
the unit control box with electrical conduit. The unit raceway
provides the UL required clearance between high and low-volt-
age wiring. Pass the control wires through the hole provided in
the corner post, then feed the wires thorough the raceway to the
RTU Open Controller. Connect the wires to the removable
Phoenix connectors and then reconnect the connectors to the
board.
IMPORTANT: Refer to the specific sensor or accessory in-
structions for its proper installation and for rooftop unit in-
stallation refer to base unit installation instructions and the
unit's wiring diagrams.
1. BACnet is a registered trademark of ASHRAE (American Society of
Heating, Refrigerating and Air-Conditioning Engineers).
2. Modbus is a registered trademark of Schneider Electric.
3. LonWorks is a registered trademark of Echelon Corporation.
4. BACview is a registered trademark of Automated Logic Corporation.
33
1 , Modbus 2 , Johnson
can be used with
4