Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53330016-01 Printed in U.S.A. Form 33CS-68SI Pg 1 5-11 Replaces: 33CS-67SI

Installation, Start-Up and Configuration Instructions

Part Number 33CSPREMLK

CONTENTS

Page

SAFETY CONSIDERATIONS

GENERAL

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30 Inspection PremierLink Controller Hardware Field-Supplied Hardware

• SPACE TEMPERATURE (SPT) SENSOR

• SUPPLY AIR TEMPERATURE (SAT) SENSOR

• INDOOR AIR QUALITY CO2 SENSOR

• OUTDOOR AIR QUALITY CO2 SENSOR

• RELATIVE HUMIDITY SENSOR

• OUTDOOR AIR TEMPERATURE SENSOR

• OUTDOOR AIR ENTHALPY SWITCH/RECEIVER

• FILTER SWITCH

Mount PremierLink Control

• LOCATION

• MOUNTING

PremierLink Controller Inputs and Outputs Control Wiring Install Sensors

• SPACE TEMPERATURE (SPT) SENSOR

INSTALLATION

• SUPPLY AIR TEMPERATURE (SAT) SENSOR

INSTALLATION

• INDOOR AIR QUALITY CO2 SENSOR

INSTALLATION

• OUTDOOR AIR QUALITY CO2 SENSOR

INSTALLATION

• HUMIDITY SENSOR (WALL-MOUNTED) INSTAL-

LATION

• OUTDOOR AIR TEMPERATURE SENSOR

• FACTORY-INSTALLED CONTROLLER

Connect Discrete Inputs Connect to CCN Communication Bus

• COMMUNICATIONS BUS WIRE SPECIFICATIONS

Enthalpy/Switch Receiver

• OUTDOOR ENTHALPY CONTROL

• DIFFERENTIAL ENTHALPY CONTROL

Enthalpy Sensors and Control

• OUTDOOR AIR ENTHALPY SENSOR/

ENTHALPY CONTROLLER

• RETURN AIR ENTHALPY SENSOR

Economizer

• Q769B ADAPTER

• Q769C ADAPTER

Economizer with 4 to 20 mA Actuator

• DRIVE DIRECTION

• SWITCH SELECTION

• WIRING

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-37

Page Perform System Check-Out Initial Operation and Test Sequence of Operation

• THERMOSTAT MODE

• CCN SENSOR MODE

Alarms

CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37-55

Points Display Screen Thermostat Control Input Screen Alarm Service Configuration Screen Controller Identification Screen Holiday Configuration Screen Occupancy Configuration Screen Set Point Screen Service Configuration Selection Screen PremierLink Configuration Screen Occupancy Maintenance Screen Primary Maintenance Screen System Pilot™ Maintenance Table System Pilot Alternate Maintenance Table

APPENDIX A — CCN SCREENS . . . . . . . . . . . . . . 56-59

SAFETY CONSIDERATIONS

SAFETY NOTE

Air-conditioning equipment will provide safe and reliable service when operated within design specifications. The equipment should be operated and serviced only by autho-rized personnel who have a thorough knowledge of system operation, safety devices and emergency procedures.

Good judgement should be used in applying any manufac-turer’s instructions to avoid injury to personnel or damage to equipment and property.

WARNING

Disconnect all power to the unit before performing mainte-nance or service. Unit may automatically start if power is not disconnected. Electrical shock and personal injury could result.

CAUTION

An individual field-supplied 24-vac power transformer is recommended for each PremierLink controller. If the unit transformer is used but does not have enough power, dam-age to equipment may result. The field-supplied trans-former must be less than 100 VA to meet UL (Underwriters Laboratories) Class 2.

PREMIERLINK™

Retrofit Rooftop Controller

Version 3.x

GENERAL

The PremierLink™ controller, version 3.x, is a field retrofit rooftop control compatible with the Carrier Comfort Network®

(CCN) system. This control is designed to allow users the ac-cess and ability to change factory-defined settings, thus ex-panding the function of the standard unit control board. The complete PremierLink package (part number 33CSPREMLK) consists of a rooftop control circuit board with plastic cover and label, wire harnesses, spade connectors, wire nuts and 4 mounting screws.

Access is available via an RJ-11 connection or a 3-wire con-nection to the communication bus. User interfaces available for use with the CCN system are PCs equipped with Carrier user interface software such as Service Tool, ComfortVIEW™, or ComfortWORKS® software. When used as part of the CCN system, other devices such as the CCN data transfer, System Pilot™, Touch Pilot™, or Comfort Controller can read data from or write data to the PremierLink retrofit controller. The PremierLink controller default address is 0,31.

The PremierLink controller is available as a factory-installed option on some units. Additional terminal board(s) are provided for field wiring. Sensors and input devices added in the field should be wired to the terminal board(s) instead of di-rectly to the PremierLink controller. Refer to the unit installa-tion and service manuals for terminal locations and details. For typical factory wiring details, see Factory-Installed Controller section on page 19. Refer to unit’s label wiring diagram for specific unit wiring.

INSTALLATION

Inspection — Inspect package contents for visual defects that may have occurred during shipping. If there is any dam-age, contact your local representative before proceeding.

PremierLink Controller Hardware — The Premier- Link package consists of the following hardware:

• control module (with plastic cover and label)

• 7 wire harnesses

• 10 spade connectors

• wire nuts

• 4 no. 6x1-in. self-drilling Phillips pan head mounting screws

Field-Supplied Hardware — The PremierLink con-troller is configurable with the following field-supplied sensors:

• space temperature sensor (33ZCT55SPT, 33ZCT56SPT, 33ZCT59SPT, or 33PILOT-01) in sensor mode or thermo-stat mode for economizer control

• supply air temperature sensor (33ZCSENSAT) required for all applications

• indoor air quality sensor (33ZCSENCO2, 33ZCT55CO2, 33ZCT56CO2) required only for demand control ventilation. A dedicated 24-vac transformer is required.

• outdoor air quality sensor (33ZCTSENCO2) required only for demand control ventilation

• outdoor air temperature sensor (33ZCSENOAT)

• outdoor air enthalpy switch (33CSENTHSW)

• filter switch (third party differential airflow)

• return air enthalpy sensor (33CSENTSEN)

• indoor relative humidity sensor (33ZCSENSRH-01), required only for dehumidification For specific details about sensors, refer to the literature supplied with the sensor.

SPACE TEMPERATURE (SPT) SENSOR — A field-supplied Carrier space temperature sensor is required to maintain space temperature in sensor mode. There are four sensors avail-able for this application:

• 33ZCT55SPT, space temperature sensor with override button

• 33ZCT56SPT, space temperature sensor with override button and set point adjustment

• 33ZCT59SPT, space temperature sensor with LCD (liquid crystal display) screen, override button, and set point adjustment

• 33PILOT-01, System Pilot communicating room sensor with LCD display screen, override button, setpoint adjust-ment, temperature and setpoint display and system time clock If controlling an economizer in the thermostat mode, a duct sensor must be mounted in the return air duct and wired to SPT input.

SUPPLY AIR TEMPERATURE (SAT) SENSOR — The PremierLink controller must be connected to a field-supplied supply air temperature (SAT) sensor (part number 33ZCSENSAT) to monitor the temperature of the air delivered.

The SAT consists of a thermistor encased within a stainless steel probe. The probe is 6 in. nominal length. The SAT sensor has 114 in. of unshielded, plenum-rated cable (2 conductors, 22 AWG [American Wire Gage]). The sensor range is –40 to 185 F with a nominal resistance of 10,000 ohms at 77 F. The sensor measures temperature with an accuracy of ±0.36 F.

Ideally, the SAT sensor should be located inside the unit under the heat exchanger. The SAT sensor can also be installed in the supply air duct downstream from unit heat source to control.

INDOOR AIR QUALITY CO2 SENSOR — An indoor air quality sensor is required for CO2 level monitoring. Three different CO2 sensors are available for this application:

• 33ZCSENCO2 sensor is an indoor, wall-mounted sensor with an LCD (liquid-crystal display) screen

• 33ZCT55CO2 sensor is an indoor, wall-mounted sensor without display. The CO2 sensor also includes a space tem-perature sensor with override button

• 33ZCT56CO2 sensor is an indoor, wall-mounted sensor without display. The CO2 sensor also includes a space tem-perature sensor with override button and temperature offset

OUTDOOR AIR QUALITY CO2 SENSOR — The outdoor air CO2 sensor (33ZCSENCO2) is designed to moni-tor carbon dioxide (CO2) levels found in diesel exhaust and control ventilation systems. It comes with an outdoor enclo-sure. This sensor provides an outdoor baseline for differential DCV (demand controlled ventilation) control.

NOTE: The relative humidity sensor and the outdoor air CO2 sensor cannot both be used on the controller at the same time.

RELATIVE HUMIDITY SENSOR — The 33ZCSENSRH- 01 relative space humidity sensor is required for dehumidifica-tion control on a rooftop unit equipped with a dehumidification device. Otherwise, the relative humidity sensor is used for monitoring only.

NOTE: The relative humidity sensor and the outdoor air CO2 sensor cannot both be used on the controller at the same time.

OUTDOOR AIR TEMPERATURE SENSOR — The outdoor air temperature sensor (33ZCSENOAT) monitors the temperature of the outside air. If the sensor is to be installed in the outdoor air duct instead of an outdoor location, sensor 33ZCSENPAT should be used.

OUTDOOR AIR ENTHALPY SWITCH/RECEIVER

(33CSENTHSW) — This device measures both temperature and humidity and converts the data into a relay output depen-dent on the sensor mode. Mode 1 is designed to energize the relay at a fixed set point of 28 Btu/lb or 75 F. Mode 2 is used in

IMPORTANT: PremierLink part number 33CSPREMLK should only be used in applications where the integrity of the Underwriters Laboratories rating will be maintained.

conjunction with the return air enthalpy sensor (33CSENTSEN) to measure both indoor and outdoor enthalpy and to determine which is greater. The enthalpy switch output can be normally open or normally closed.

FILTER SWITCH — A field-supplied third-party differential air flow switch with normally open contacts is requried for de-tection of dirty filters. The switch must be rated for a minimum of 5 va at 24 vac.

Mount PremierLink™ Control LOCATION — The PremierLink controller should be located inside one of the available service access panels of the unit. Be sure the location selected prevents moisture and rain from coming into contact with the circuit board.

Select a location which will be safe from water damage and allow sufficient access for service and wiring. For service access, there should be at least 6 in. of clearance between the front of the PremierLink controller and adjacent surfaces. Be sure to leave 1/2-in. clearance in front of RJ-14 connector for attaching RJ-14 cable from a CCN interface device. A field-supplied right angle 6-pin RJ-14 connector can be attached if necessary.

NOTE: If the PremierLink controller must be installed in a location where there is not easy access to CCN connectors, a remote connection kit (part number 33CSREMCCN) can be ordered.

MOUNTING — Refer to Mounting Sheet included with controller for additional detailed mounting instructions.

1. Ensure all power to unit is removed.

2. Locate a space in the unit control panel or a space inside the equipment that is free from dirt and dust.

3. Remove plastic cover by gently squeezing the middle of longer sides of the cover and pull away from the board.

This will release the locking tabs inside.

4. Mount the PremierLink controller to the desired location by holding the controller firmly in place. Be sure all standoffs are in contact with mounting surface and board DOES NOT flex. Attach controller to unit using 4 screws provided ensuring a secure grip to unit surface.

See Fig.1.

NOTE: If PremierLink controller will be installed in same location where Apollo controller was previously installed, simply use 2 of the existing Apollo mounting holes to line up with the board.

5. Provide 24 v power to the circuit board from the unit transformer or an isolated power transformer. Use the appropriate conductors for voltage per base unit name-plate. See Fig. 2-7. Board will require 10 va at 24 vac.

6. Replace plastic cover to protect circuit board.

7. Restore power to unit.

PremierLink Controller Inputs and Outputs — The PremierLink controller inputs and outputs are shown in Table 1.

IMPORTANT: Do not install in indoor fan section of unit.

WARNING

Disconnect electrical power before wiring the Premier- Link controller. Electrical shock, personal injury, or damage to the PremierLink controller can result.

Fig. 1 — PremierLink Control Modulea33-9209

PWR

HS3/EXH/RVS

HS2

HS1

CMP2

CMP1

FAN

RED

ORN

PNK

WHT

BLU

YEL

GRN

BRN

RED

RED

C U

T F

O R

D U

A L

T R

A N

S F

O R

M E

R E

Q U

IP

M

E N

T

R E

LA

Y

S

C U

T T

O

IS

O

LA

T E

C O

N T

R O

LL

E

R P

O W

E R

P W

R J1

J8

R

Y1

Y2

W1

W2

G

C

X

48HJ,TJ004-014

50HJ,TJ004-014

50HJQ,TJQ004-012

ROOFTOP UNIT

GRN

RED

YEL

BLU

RMTOCC

CMPSAFE

FSD

RED

WHT

SFS

RED

PNK

RED

ORN

RED

ENTH

FILTER

D

IS

C R

E T

E J4

DDC CONTROL

RED

RED

PWR

HS3/EXH/RVS

HS2

HS1

CMP2

CMP1

FAN

RED

ORN

PNK

WHT

BLU

YEL

GRN

BRN

RED

RED

C U

T F

O R

D U

A L

T R

A N

S F

O R

M E

R E

Q U

IP

M

E N

T

R E

LA

Y

S

C U

T T

O

IS

O

LA

T E

C O

N T

R O

LL

E

R P

O W

E R

P W

R J1

J8

W2

W1

R

C

Y1

Y2

G

X

48HJ015-025

50HJ015-025

48TJ016-028

50TJ016-028

ROOFTOP UNIT

GRN

RED

YEL

BLU

RMTOCC

CMPSAFE

FSD

RED

WHT

SFS

RED

PNK

RED

ORN

RED

ENTH

FILTER

D

IS

C R

E T

E J4

TB2

DDC CONTROL

RED

RED

48/50HJ,TJ004-014 AND 50HJQ,TJQ004-012 UNITS

48/50HJ015-025 AND 48/50TJ016-028 UNITS

NOTE: Inputs on J4 are 24 VAC; red leads are voltage source.

Fig. 2 — Typical PremierLink™ Control Wiring to 48/50HJ,TJ, 50HJQ,TJQ Rooftop Units a33-9130 a33-9131

PWR

HS3/EXH/RVS

HS2

HS1

CMP2

CMP1

FAN

RED

ORN

PNK

WHT

BLU

YEL

GRN

BRN

RED

RED

C U

T F

O R

D U

A L

T R

A N

S F

O R

M E

R E

Q U

IP

M

E N

T

R E

LA

Y

S

C U

T T

O

IS

O

LA

T E

C O

N T

R O

LL

E

R P

O W

E R

P W

R J1

J8

RC

RH

W1

W2

Y1

Y2

G

C

50HJQ014,016

GRN

RED

YEL

BLU

RMTOCC

CMPSAFE

FSD

RED

WHT

SFS

RED

PNK

RED

ORN

RED

ENTH

FILTER

D

IS

C R

E T

E J4

X

TB2

R E

D

DDC CONTROL

R E

D

C A

P O

R R

E M

O V

E T

H

IS

E N

D O

F

JU

M P

E R

PWR

HS3/EXH/ RV S

HS2

HS1

CMP2

CMP1

FA N

RED

ORN

PNK

WHT

BL U

YEL

GRN

BRN

RED

RED

C U

T F

O R

D U

A L

T R

A N

S F

O R

M E

R

Q

U

IP

M E

N T

L A Y

S

C U

T

O

IS

L A

C

N T

R O

LL

P

W

P W

J1

J8

GRN

RED

YEL

BLU

RMTOCC

CMPSAFE

FSD

RED

WHT

SFS

RED

PNK

RED

ORN

RED

ENTH

FILTER

D

IS

C R

E T

E J4

RED

DDC CONTROL

RED

CENTRAL

TERMINAL

BOARD

T H E R M O S T A T

X

C

G

W2

W1

Y2

Y1

R

50HJQ014,016 UNITS

NOTE: Inputs are 24 VAC; red leads are voltage source.

Fig. 2 — Typical PremierLink™ Control Wiring to 48/50HJ,TJ, 50HJQ,TJQ Rooftop Units (cont) a33-9132

NOTE: Inputs are 24 VAC; red leads are voltage source.

Fig. 3 — Typical PremierLink™ Control Wiring to 48/50HC,TC, 50HCQ,TCQ Rooftop Units a33-9210

Fig. 4 — Typical PremierLink™ Control Wiring to 38AH024-034 Units with Single Air Handler

(24 v) (115 v)

LEGEND

CB — Circuit Breaker EQUIP — Equipment GND — Ground IFC — Indoor Fan Contactor LLSV — Liquid Line Solenoid Valve NEC — National Electrical Code TB — Terminal Block

Field Control Wiring Factory Wiring Field Power Wiring

*Use thermostat wiring shown here for single air-handler applications.

†CB3 protects control circuit at the following unit voltages:

**For a single air handler, LLSV valve 1 is to be used on the lower

(no. 1) evaporator circuit. The LLSV valve 2 is to be used on the upper (no. 2) evaporator circuit.

††Only one indoor-fan contactor is required on single air-handler appli-cations. Use Carrier accessory part no. 40RR900181 for indoor-fan contactor.

CONTROL CIRCUIT PROTECTED AT:

(V-Ph-Hz) UNIT (V-Ph-Hz)

115-1-60 208/230-3-60

460-3-60 575-3-60

230-1-60 380-3-60

NOTES:

1. CB4 protects TB2 circuit; CB3 protects TB3 circuits.

2. LLSV1 and LLSV2 are field supplied.

3. TB2 is 24 v and TB3 is 115 v.

a38- 7050.eps

Fig. 5 — Typical PremierLink™ Control Wiring to 38AH024-034 Units with 2 Air Handlers

(24 v)

TB2

CB3*

CB4

IFC†

CCS

COOL

COOL

COOL

R

C

R

C

FAN

CCS

COOL

IFC†

FAN

CKT 1

TSTAT

CKT 2

TSTAT **

LEGEND

CB — Circuit Breaker CCS — Capacity Control Solenoid IFC — Indoor-Fan Contactor

Field Control Wiring

*CB3 protects control circuit as follows:

†Use Carrier accessory part no. 40RR900181 for indoor-fan contactor.

**Do not install CCS2 unless accessory unloader is field-installed on circuit no. 2 compressor.

NOTE: Capacity control solenoid (and liquid line solenoid drop refriger-ant control) valves are field supplied.

CONTROL CIRCUIT PROTECTED AT:

(V-Ph-Hz) UNIT (V-Ph-Hz)

115-1-60 208/230-3-60

460-3-60 575-3-60

230-1-60 380-3-60a38-7051

Fig. 6 — Typical PremierLink™ Control Wiring to 38AH044-104 Units

LEGEND

CR — Control Relay HD — Heating Device IFC — Indoor-Fan Contactor IFR — Indoor-Fan Relay LLS — Liquid Line Solenoid R — Heating Relay (field-supplied 24-v sealed coil, 10 va maximum rating) TB — Terminal Block

Factory Wiring Field Wiring

*To control heating device and provide automatic indoor-fan opera-tion on heating.

NOTES:

1. Field-supplied liquid line solenoid valves installed at the evapo-rator are required on all units.

2. Internal single zone relay contacts are rated for 1 amp/24 vac.

3. TB3 and TB4 control voltages are as follows:

115 v for 208/230, 460, and 575 v units 230 v for 380/415 and 380 v units 200 v for 346 v units

IFR

CR

CR

24V

CR2

BRN

RED

YEL

IFR

CR1

VIO

ACCESSORY

RELAY

PACKAGE

TB3

2 3 4 5 6 7 8 1

TB4

2 3 4 5 6 7 8

LLS

-B1

(SEE

NOTE)

LLS

-A1

(SEE

NOTE)

IFC

R

Y1

Y2

W1

W2

G

C

X

R

L1 L2

HD

R

TSTAT

24 vac

Table 1 — PremierLink Controller Inputs and Outputs

LEGEND

INPUTS POWER TERMINAL(S)

SPACE TEMPERATURE (SPT) AI (10K Thermistor) J6-7, J6-6 SET POINT ADJUSTMENT (STO) AI (10K Thermistor) J6-5, J6-6 SUPPLY AIR TEMPERATURE (SAT) AI (10 K Thermistor) J6-3, J6-4 OUTDOOR AIR TEMPERATURE (OAT) AI (10K Thermistor) J6-1, J6-2 IAQ SENSOR (IAQI) (4-20 mA) J5-5, J5-6 OUTDOOR AQ/INDOOR HUMIDITY SENSOR (OAQ/IRH) (4-20 mA) J5-2, J5-3

REMOTE TIME CLOCK/DOOR SWITCH (RMTOCC) DI (24 VAC) J4-11, J4-12

COMPRESSOR LOCKOUT (CMPSAFE) DI (24 VAC) J4-9, J4-10

FIRE SHUTDOWN (FSD) DI (24 VAC) J4-7, J4-8

SUPPLY FAN STATUS (SFS) DI (24 VAC) J4-5, J4-6

FILTER STATUS (FLTS) DI (24 VAC) J4-3, J4-4

ENTHALPY STATUS (ENTH) DI (24 VAC) J4-1, J4-2

OUTPUTS POWER TERMINALS

ECONOMIZER (ECONPOS) 4-20 mA J9-1, J9-2 FAN (SF) DO Relay (24 VAC, 1A) J8-18 COOL STAGE 1 (CMP1) DO Relay (24 VAC, 1A) J8-15 COOL STAGE 2 (CMP2) DO Relay (24 VAC, 1A) J8-12 HEAT STAGE 1 (HS1) DO Relay (24 VAC, 1A) J8-9 HEAT STAGE 2 (HS2) DO Relay (24 VAC, 1A) J8-6 HEAT 3/EXHAUST/REV VALVE/DEH/OCC RELAY (HS3/EXH/RVS) DO Relay (24 VAC, 1A) J8-3

AI — Analog Input DI — Digital Input DO — Digital Output

(115 V) (24 V)

Fig. 7 — Typical PremierLink™ Control Wiring to 38AKS028-044 Units with Single Air Handler

LEGEND

AFS — Airflow Switch CB — Circuit Breaker EQUIP — Equipment GND — Ground LLSV — Liquid Line Solenoid Valve TB — Terminal Block TSTAT — Thermostat

Field Control Wiring Factory Wiring Field Power Wiring

NOTES:

1. Factory wiring in accordance with NEC (National Electrical Code). Any field modifications or additions must be in compliance with all applicable codes.

2. All field interlock contacts must have minimum rating of 180-va pilot duty plus capacity required for field-installed equipment. All field interlock contacts in the 24-v control circuit must have minimum rating of 70-va pilot duty plus capacity required for field-installed equipment.

3. For internal unit wiring, reference wiring book or unit wiring label diagram. TB2 is 115-1-60, TB3 is 24-1-60.

4. The following components are not located in the 38AKS unit control box: LLS1, LLS2, field control thermostat, AFS, alarm shut-off switch, and alarm or light.

Control Wiring — The PremierLink controller can be connected to either a Carrier-approved thermostat or CCN compatible temperature sensor.

1. Turn off power to the control box.

2. Strip the ends of the red, white, and black conductors of the communication bus cable.

NOTE: When connecting the communication bus cable, a color code system for the entire network is recommended to simplify installation and checkout. See Table 2 for the recommended color code.

Table 2 — Color Code Recommendations

3. Use 4-pin Molex harness with red, white and black wires to connect the communication wires. Verify the color codes in Table 2 to ensure the Red (+) wire connects to Terminal 1. Connect the White (ground) wire to Terminal

2. Connect the Black (–) wire to Terminal 3.

4. Secure all connections in Step 3 with wire nuts.

5. Insert the plug into the existing 4-pin mating connector on the base module in the main control box (Terminal J-2).

6. Restore power.

Install Sensors — The PremierLink™ controller can be used with any combination of CO2 and space temperature sen-sors. Refer to the instructions supplied with each sensor for electrical requirements.

NOTE: All sensors are field-installed accessories.

SPACE TEMPERATURE (SPT) SENSOR INSTALLA-

TION — There are four types of SPT sensors available from Carrier: The 33ZCT55SPT space temperature sensor with timed override button, the 33ZCT56SPT space temperature sensor with timed override button and set point adjustment, the 33ZCT59SPT space temperature sensor with LCD screen, override button, and set point adjustment, and the 33PILOT-01 System Pilot™ communicating room sensor with LCD display screen, override button, setpoint adjustment, temperature and setpoint display and system time clock.

The space temperature sensors are used to measure the building interior temperature. The System Pilot communicat-ing room sensors measure and maintain room temperature by communicating with the controller. Sensors should be located on an interior building wall. The sensor wall plate accommo-dates the NEMA (National Electrical Manufacturers Associa-tion) standard 2 x 4 junction box. The sensor can be mounted directly on the wall surface if acceptable by local codes.

Do not mount the sensor in drafty locations such as near air conditioning or heating ducts, over heat sources such as base-board heaters, radiators, or directly above wall-mounted light-ing dimmers. Do not mount the sensor near a window which may be opened, near a wall corner, or a door. Sensors mounted in these areas will have inaccurate and erratic sensor readings.

The sensor should be mounted approximately 5 ft from the floor, in an area representing the average temperature in the space. Allow at least 4 ft between the sensor and any corner and mount the sensor at least 2 ft from an open doorway. The SPT sensor wires are to be connected to terminals in the unit main control board.

Install the sensor as follows:

1. Locate the 2 Allen type screws at the bottom of the sensor.

2. Turn the two screws clockwise to release the cover from the sensor wall mounting plate.

3. Lift the cover from the bottom and then release it from the top fasteners.

4. Feed the wires from the electrical box through the open-ing in the center of the sensor mounting plate.

5. Using two no. 6-32 x 1 mounting screws (provided with the sensor), secure the sensor to the electrical box.

NOTE: Sensor may also be mounted directly on the wall using 2 plastic anchors and 2 sheet metal screws (field-supplied).

6. Use 20 gage wire to connect the sensor to the controller.

The wire is suitable for distances of up to 500 ft. Use a three-conductor shielded cable for the sensor and set point adjustment connections. The standard CCN communication cable may be used. If the set point adjust-ment (slidebar) is not required, then an unshielded, 18 or 20 gage, two-conductor, twisted pair cable may be used.

The CCN network service jack requires a separate, shielded CCN communication cable. Always use sepa-rate cables for CCN communication and sensor wir-ing. (Refer to Fig. 8-11 for wire terminations.)

7. Replace the cover by inserting the cover at the top of the mounting plate first, then swing the cover down over the lower portion. Rotate the 2 Allen head screws counter-clockwise until the cover is secured to the mounting plate and locked in position.

NOTE: See Table 3 for thermistor resistance vs temperature values.

SIGNAL TYPE CCN BUS WIRE

COLOR

CCN PLUG PIN

NUMBER

+ Red 1 Ground White 2

– Black 3

2 3 4 5 61

SW1

SEN

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-) CCN COM

SENSOR WIRING

Fig. 8 — Space Temperature Sensor Typical Wiring (33ZCT55SPT) a33-675ef

Table 3 — Thermistor Resistance vs Temperature Values for Space Temperature Sensor, Supply Air Temperature Sensor, and

Outdoor Air Temperature Sensor

Wiring Space Temperature Sensor or System Pilot™ Device

— To wire sensor, perform following (see Fig. 8-11):

1. Identify which cable is for the sensor wiring.

2. Strip back the jacket from the cables for at least 3 inches.

Strip 1/4-in. of insulation from each conductor. Cut the shield and drain wire from the sensor end of the cable.

3. Connect the sensor cable as follows:

a. Connect one wire from the cable to (BLU) wire on

J6-7 analog connector on the controller. Connect the other end of the wire to the left terminal on the SEN terminal block of the sensor. See Fig. 11.

b. Connect another wire from the cable to (BRN) J6-6 analog connector on the controller. Connect the other end of the wire to the remaining open ter-minal on the SEN terminal block. On the 33ZCT59SPT sensor, connect this cable to 24-v COM terminal. A separate 24-vac transformer is required for this sensor. See Fig. 12.

c. On 33ZCT56SPT and 33ZCT59SPT sensors, con-nect the remaining wire to the (BLK) STO on J6-5 connector on the controller. Connect the other end of the wire to the SET terminal on the sensor.

TEMP

(C)

TEMP

(F)

RESISTANCE

(Ohms)

–40 –40 335,651 –35 –31 242,195 –30 –22 176,683 –25 –13 130,243 –20 –4 96,974 –15 5 72,895 –10 14 55,298 –5 23 42,315

0 32 32,651 5 41 25,395

10 50 19,903 15 59 15,714 20 68 12,494 25 77 10,000 30 86 8,056 35 95 6,530 40 104 5,325 45 113 4,367 50 122 3,601 55 131 2,985 60 140 2,487 65 149 2,082 70 158 1,752

2 3 4 5 61

SW1

SEN SET

Cool Warm

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-) CCN COM

SENSOR WIRING

JUMPER

TERMINALS

AS SHOWN

BLK

(T56)

Fig. 9 — Space Temperature Sensor Typical Wiring (33ZCT56SPT) a33-676ef

6 5 4 3 2 1

+ +G G- -

RED(+)

WHITE(GND)

BLACK(-)

(GND)

TO

CARRIER

NETWORK

CONNECTION

TO SEPARATE

24-VAC

TRANSFORMER

{POWER

Fig. 10 — System Pilot Wiring

OR SET SEN

OPB COM- PWR+

BLU (SPT)

BLK (STO)

24 VAC

SENSOR

WIRING

POWER

WIRING

BRN (COM)

NOTE: Must use a separate isolated transformer.

Fig. 11 — Space Temperature Sensor Typical Wiring (33ZCT59SPT)

4-m A

F ig

. 1

P re m ie rL in k™

C o n tr o lle r an d S en so r W ir in g

3Z

C T

S

P T a n d

3Z C

T

S P

T S p ac e Te m p er at u re

S en so rs

Z C

S E

N S

A T

S u p p ly A ir T em p er at u re

S en so r;

In d o o r R el at iv e

H u m id it y

S en so r

(3 3Z

C S

E N

S R

H -0

1)

Z C

S E

N C

O

(O u td o o r)

, a n d

3Z C

T

C O

2, 3Z C

T

C O

(I n d o o

r) A ir Q u al it y

S en so rs a33-9211

d. In the control box, install a no. 10 ring type crimp lug on the shield drain wire. Install this lug under the mounting screw of the PremierLink controller.

e. On 33ZCT56SPT sensors, install a jumper between the two center terminals (right SEN and left SET). See Fig. 9.

f. Refer to Fig 10 for the System Pilot™ device wir-ing. Once the System Pilot device is powered up, it will display the time of day and space tempera-ture. Refer to the System Pilot Installation and Operation manual for programming to attach the sensor to the PremierLink control.

NOTE: See Fig. 13 for space temperature sensor averaging.

SUPPLY AIR TEMPERATURE (SAT) SENSOR INSTAL-

LATION — The 33ZCSENSAT supply air temperature sensor is required for controller operation. The sensor consists of a thermistor encased within a stainless steel probe. The SAT sensor probe is 6-in. nominal length with 114 in. of unshielded, 2-conductor 18 AWG twisted-pair cables. The sensor tempera-ture range is –40 to 245 F with a nominal resistance of 10,000 ohms at 77 F. The sensor measures accuracy of

±0.36 F. The SAT sensor is supplied with a gasket and 2 self-drilling mounting screws.

NOTE: The sensor must be mounted in the discharge of the unit, downstream of the cooling coil and heat exchanger. Be sure the probe tip does not come in contact with any of the unit surfaces. See Fig. 14 and 15 for mounting location.

Do not run sensor or relay wires in the same conduit or race-way with Class 1 AC service wiring. Do not abrade, cut, or nick the outer jacket of the cable. Do not pull or draw cable with a force that may harm the physical or electrical properties.

Avoid splices in any control wiring.

Perform the following steps to connect the SAT sensor to the PremierLink™ controller:

1. Locate the opening in the control box. Pass the sensor probe through the hole.

2. Drill or punch a 1/2-in. hole in the unit.

3. Use two field-supplied, self-drilling screws to secure the sensor probe to the unit.

4. Connect the sensor leads to the PremierLink controller’s wiring harness J6-3,4 board at the terminals labeled SAT (ORN) and GND (BRN). See Fig. 12.

J6

RED

BLK

RED RED

BLK BLK

BLK

RED

BLK

RED

SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4

J6

RED

BLK

RED

BLK

SENSOR 2SENSOR 1

RED

RED

BLK

SENSOR 3

SENSOR 4

BLK

B

LK

R E

D

RED RED

BLK BLK

SENSOR 8 SENSOR 9

SENSOR 5

RED

BLK

SENSOR 6

SENSOR 7

B

LK

R E

D

SPACE TEMPERATURE AVERAGING — 4 SENSOR APPLICATION

SPACE TEMPERATURE AVERAGING — 9 SENSOR APPLICATION

Fig. 13 — Space Temperature Averaging

LEGEND

Factory Wiring

Field Wiring a33-678ef a33-679ef

Perform the following steps if state or local code requires the use of conduit, or if the installation requires a cable length of more than 8 ft:

1. Secure the probe to the unit with two field-supplied self-drilling screws.

2. If extending cable length beyond 8 ft, use plenum rated, 20 AWG, twisted pair wire.

3. Connect the sensor leads to the PremierLink controller’s wiring harness terminal board at the terminals labeled SAT (ORN) and GND (BRN).

4. Neatly bundle and secure excess wire.

INDOOR AIR QUALITY CO2 SENSOR INSTALLATION

(IAQ) — The indoor air quality sensor accessory monitors carbon dioxide (CO2) levels. This information is used to moni-tor IAQ levels. Three types of sensors are provided. The wall sensor can be used to monitor the conditioned air space.

Sensors use infrared technology to measure the levels of CO2 present in the air. The wall sensor is available with or without an LCD readout to display the CO2 level in ppm.

The CO2 sensors are all factory set for a range of 0 to 2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO2 sensor for electrical require-ments and terminal locations.

To accurately monitor the quality of the air in the condi-tioned air space, locate the sensor near a return-air grille (if present) so it senses the concentration of CO2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources. Allow at least 3 ft between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor — To wire the sensors after they are mounted in the conditioned air space or outdoor location, see Fig. 12 and the instructions shipped with the sen-sors. For each sensor, use two 2-conductor 18 AWG (American Wire Gage) twisted-pair cables (unshielded) to connect the sep-arate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals. To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the sensor. Connect the 4-20 mA ter-minal to terminal IAQ (RED) and connect the SIG COM ter-minal to terminal GND (BRN).

Combination Temperature and CO2 Sensor — If using the older style combination temperature and CO2 sensor (33ZCT55CO2 or 33ZCT56CO2), refer to the installation in-structions provided with the sensor. See Fig. 16 for wiring. If using the combination temperature and CO2 sensor 33ZCPTCO2-01 or 33ZCSPTCO2LCD-01, refer to he instal-lation instructions provided with the sensor. See Fig. 17 for wiring.

OUTDOOR AIR QUALITY CO2 SENSOR INSTALLA-

TION (OAQ) — The outdoor air CO2 sensor is designed to monitor carbon dioxide (CO2) levels in the air and interface with the ventilation damper in an HVAC system. The OAQ sensor is packaged with an outdoor cover. See Fig. 18 and 19.

The outdoor air CO2 sensor must be placed in an area that is representative of the entire conditioned space. A mounting height of 6 ft is recommended. For installation where it is not necessary to reach the control, it may be mounted higher on the wall or on the ceiling, provided the location represents a good sampling of air.

Wiring the Outdoor Air CO2 Sensor — Power requirements are 18 to 36 VAC RMS 50/60 Hz; 18 to 42 vdc polarity protected/dependent; and 70 mA average, 100 mA peak at 24 vdc. All system wiring must be in compliance with all applicable local and national codes. A dedicated power supply is required for this sensor. A two-wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2.

To connect the sensor to the control, identify the positive (4 to 20 mA) and ground (SIG COM) terminals on the sensor. Con-nect the 4 to 20 mA terminal OAQ (BLU) terminal J5-2. Con-nect the SIG COM terminal to terminal GND (BRN) terminal J5-3. See Fig. 16.

SUPPLY AIR RETURN AIR

SUPPLY AIR

TEMPERATURE

SENSOR

ROOF

CURB

Fig. 14 — Typical Mounting Location for Supply Air Temperature (SAT) Sensor

On Small Rooftop Units a33-684ef

DIRECT DRIVE

MOTOR

DIMPLED HEAT

EXCHANGER

SAT

LOCATION

Fig. 15 — Typical Mounting Location for Supply Air Temperature (SAT) Sensor in Heat Exchanger

IMPORTANT: Be certain SAT does not come in contact with heat exchanger tubes.

a33-685ef

3 2 1

J5

J5

J4

J3

V

A C

D E

D

IC

AT

E

D

V

A C

T R

A N

S F

O R

M E

R

S E

E N

O T

E

S E

E N

O T

E

F ig

. 1

P re m ie rL in k™

C o n tr o lle r W ir in g

C o m b in at io n

T em p er at u re a n d

C O

S en so r

3Z

C T

C

O 2, 3Z

C T

C

O

N O

T E

S

1.

O pt io na l 2

V

D C p ow er s ou rc e m ay O

N

LY

b e us ed if P re m ie rL in k co nt ro l i s us in g a de di ca te d tra ns fo rm er

2.

D o no t u se

VA

C p ow er s ou rc e if us in g

V D

C fr om P re m ie rL in k co nt ro lle r.

AC- / DC-

AC+ / DC+

THERM +

THERM -

COM

4 - 20 mA

0-5 / 10 VDC

-4

VD

C

-3

VA

C

BL

U

BR

N

BR

N

BL

U

RE

D

F ig

. 1

P re m ie rL in k™

C o n tr o lle r W ir in g

C o m b in at io n

T em p er at u re a n d

C O

S en so r

3Z

C S

P T

C O

2-

, 3 3Z

C S

P T

C O

2L C

D -0

N O

T E

S

1.

R em ov e R

E D w ire fr om

J 4-

1, J

4- 3, J 4-

5, J

4- 7, J 4-

9, o r J 4-

(w hi ch ev er is n ot b ei ng u se

d) a nd in se rt

J 5-

4.

2.

S en so r d oe s

N O

T h av e an o ve rr id e bu tto n.

a33-4359

HUMIDITY SENSOR (WALL-MOUNTED) INSTALLA-

TION — The accessory space humidity sensor is installed on an interior wall to measure the relative humidity of the air with-in the occupied space.

The use of a standard 2 x 4-in. electrical box to accommo-date the wiring is recommended for installation. The sensor can be mounted directly on the wall, if acceptable by local codes.

If the sensor is installed directly on a wall surface, install the humidity sensor using 2 screws and 2 hollow wall anchors (field-supplied). Do not over tighten screws. See Fig. 20.

The sensor must be mounted vertically on the wall. The Carrier logo should be oriented correctly when the sensor is properly mounted.

Avoid corner locations. Allow at least 4 ft between the sen-sor and any corner. Airflow near corners tends to be reduced, resulting in erratic sensor readings. The sensor should be verti-cally mounted approximately 5 ft up from the floor, beside the space temperature sensor.

For wiring distances up to 500 feet, use a 3-conductor, 18 or 20 AWG cable. A CCN communication cable can be used, al-though the shield is not required. The shield must be removed from the sensor end of the cable if this cable is used. See Fig. 21 for wiring details.

The power for the sensor is provided by the PremierLink controls on terminal J5-4 (+33 to +35vdc). To wire the sensor perform the following:

1. At the sensor, remove 4-in. of jacket from the cable. Strip 1/4-in. of insulation from each conductor. Route the cable through the wire clearance opening in the center of the sensor. See Fig. 20.

2. Connect a field-supplied BLACK wire to the sensor screw terminal marked Vin.

3. Connect a field-supplied RED wire into the sensor screw terminal marked Io.

4. At the PremierLink controller, route the cable away from high voltage wiring and disconnect the power to prevent accidental shorting or grounding of wires when connect-ing the sensor. Remove the J5 Molex female plug and lo-cate the BROWN wire on pin 3. Using a small, flat blade screwdriver gently press down in the slot on the side of the plug while pulling on the BROWN wire to remove it from slot. Re-insert the BROWN wire in the pin 4 slot making sure it is securely seated. There should now be an empty slot between the BLUE and BROWN wires. See Fig. 21.

5. Connect the field-supplied RED wire from the sensor to the BLUE wire on J5-2.

6. Connect the field-supplied BLACK wire from the sensor to the BROWN wire on J5-4.

CAUTION

Do NOT clean or touch the sensing element with chemical solvents as they can permanently damage the sensor.

DO NOT mount the sensor in drafty areas such as near heating or air-conditioning ducts, open windows, fans, or over heat sources such as baseboard heaters, radiators, or wall-mounted light dimmers. Sensors mounted in those areas will produce inaccurate readings.

8 7 6 5 4 3 2 12 1

H G 24 VAC

OR

24 VDC

NC ALARM

RELAY

CONTACTS

COM

NO }

0-10VDC

SIG COM (J5-3)

4-20mA (J5-2)

Fig. 18 — Outdoor Air Quality (CO2) Sensor (33ZCSENCO2) — Typical Wiring Diagram a33-686ef

COVER REMOVED SIDE VIEW

Fig. 19 — Outdoor Air Quality Sensor Cover

SW2123456

ON

Io Vin Gnd Vo

MOUNTING

HOLES

WIRING

OPENING

Fig. 20 — Humidity Sensor Installation a33-9141 m A

N O

T E

: R em ov e

B R

O W

N w ire fr om J

5-an d in se rt in to J

5- 4.

F ig

. 2

H u m id it y S en so r W ir in g a33-9212

OUTDOOR AIR TEMPERATURE SENSOR (Fig. 22-25) — The OAT sensor must be located properly. For outdoor loca-tions use sensor 33ZCSENOAT. For duct mounting in the fresh air intake, use sensor 33ZCSENPAT. The sensor must be installed immediately upstream from outdoor-air damper where it will accurately sense the temperature of the outdoor air entering the mixing box. See Fig. 22 and 23. For applica-tions without economizer, the sensor may be located in the out-door air duct near the outdoor-air intake (Fig. 23) or on the exterior of the building (Fig. 22). The thermistor has a range of –40 to 245 F and a resistance of 10,000 ohms at 77 F.

Do not mount the sensor in direct sunlight. Inaccurate read-ings may result. Do not mount the sensor near the exhaust from air-handling units or compressors, near leakage drafts of indoor air, or near shrubbery or trees, or under direct water runoff.

If the sensor is installed outdoors, perform the following in-structions. Install the 1/2-in. conduit connector into the rear opening. Tighten the conduit connector securely to prevent water leakage into the assembly. Mount the assembly onto the 1/2-in. conduit and secure by tightening the conduit nut. After the sensor wiring is completed, secure the gasket and cover in place using the screws provided with the cover. See Fig. 24.

If the sensor is to be mounted in the outdoor air duct, use the 33ZCSENPAT sensor which has a 2 x 4-in. by 11/2-in. deep electrical box. Remove the cover and enter the knockout from the rear of the box. Install the sensor through the opening so that the sensor leads are inside the electrical box. Secure the sensor to the electrical box using a field-supplied 1/2-in. con-duit nut. Drill a 1/2-in. hole in the outdoor-air duct about a foot upstream of the outdoor-air damper. Apply a 1/4-in. bead of sil-icone type sealer around the opening and install the sensor through the hole. Secure the electrical box to the duct using 2 field-supplied, no. 10 sheet metal screws. See Fig. 25.

FACTORY-INSTALLED CONTROLLER — The Premier- Link™ controller is available as a factory-installed option on some units. Additional terminal boards are provided for wiring.

Sensors and input devices are wired to terminal boards instead of directly to the Premierlink controller. See Fig. 26 and 27.

Connect Discrete Inputs — If used, wire the dry con-tact switches, compressor safety switch, and supply fan status switch to the PremierLink controller. See Fig. 28 for wiring.

Connect to CCN Communication Bus — The PremierLink™ controller connects to the bus in a daisy chain arrangement. Negative pins on each component must be connected to respective negative pins, and likewise, positive pins on each component must be connected to respective posi-tive pins. The controller signal pins must be wired to the signal ground pins. Wiring connections for CCN must be made at the 3-pin plug.

At any baud (9600, 19200, 38400 baud), the number of con-trollers is limited to 239 devices maximum. Bus length may not exceed 4000 ft, with no more than 60 total devices on any 1000-ft section. Optically isolated RS-485 repeaters are required every 1000 ft.

NOTE: Carrier device default is 9600 band.

COMMUNICATION BUS WIRE SPECIFICATIONS —

The CCN Communication Bus wiring is field-supplied and field-installed. It consists of shielded 3-conductor cable with drain (ground) wire. The cable selected must be identical to the CCN Communication Bus wire used for the entire network.

See Table 4 for recommended cable.

Table 4 — Recommended Cables

NOTE: Conductors and drain wire must be at least 20 AWG, stranded, and tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, or polyethyl-ene. 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 –20C to 60C is required. Do not run communication wire in the same conduit as or next to any AC voltage wiring.

The communication bus shields must be tied together at each system element. If the communication bus is entirely within one building, the resulting continuous shield must be connected to ground at only one single point. If the communi-cation bus cable exits from one building and enters another building, the shields must be connected to the grounds at a lightning suppressor in each building (one point only).

Fig. 22 — Outdoor Air Temperature Sensor Installation — Located on Building Wall

(P/N 33ZCSENOAT)

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463 American A22503 Belden 8772 Columbia 02525

RETURN

AIR

OAT

OUTDOOR

AIR

ROOF TOP

UNIT

Fig. 23 — OAT Sensor Location in Outside Air Duct (P/N 33ZCSENPAT) a33-688ef

SINGLE-GANG

ALUMINUM

BELL BOX

0.5000 IN.

(12.7 mm) NPT

THREADED

CONDUIT

OPENINGS TYP.

GROUND

SCREW

4.9200 IN.

(125.0 mm)

4.5625 IN.

(115.9 mm)

2.8125 IN.

(71.4 mm)

FOAM COVER

GASKET

ALUMINUM

COVER

2.0000 IN.

(50.8 mm)

Fig. 24 — Outdoor Air Temperature Sensor (P/N 33ZCSENOAT)

LEGEND

Fig. 25 — Outdoor Air Temperature Sensor Installation (P/N 33ZCSENPAT)

OA — Outdoor Air OAT — Outdoor Air Temperature

33ZCSENPAT SENSOR DUCT MOUNTED

Fig. 26 — PremierLink™ Factory-Installed Controller Wiring for R-22 Units (48/50TM,TF,HJ,HE003-014 and 50TFQ,HJQ,HEQ003-012) a33-899

CONTROL

BOARD

ROOFTOP UNIT’S

CENTRAL TERMINAL BOARD

(HK50AA049)

Fig. 27 — PremierLink™ Factory-Installed Controller Wiring for R-410A Units (48/50TC,HC004-028 and 50TCQ,HCQ004-028) a33-9213 m A

N O

T E

: R em ov e re d w ire fr om

J 4-to p re ve nt

V A

C s ho rt in g ou t o th er c om po ne nt s or g ro un d.

F ig

. 2

P re m ie rL in k™

F ie ld -I n st al le d C o n tr o lle r

D is cr et e In p u t W ir in g a33-9214

Enthalpy Switch/Receiver — The accessory en-thalpy switch/receiver (33CSENTHSW) senses temperature and humidity of the air surrounding the device and calculates the enthalpy when used without an enthalpy sensor. The relay is energized when enthalpy is high and deenergized when enthal-py is low (based on ASHRAE [American Society of Heating, Refrigerating, and Air Conditioning Engineers] 90.1 criteria). If an accessory enthalpy sensor (33CSENTSEN) is attached to the return air sensor input, then differential enthalpy is calculated.

The relay is energized when the enthalpy detected by the return air enthalpy sensor is less than the enthalpy at the enthalpy switch/receiver. The relay is deenergized when the enthalpy de-tected by the return air enthalpy sensor is greater than the en-thalpy at the enthalpy switch/receiver (differential enthalpy con-trol). See Fig. 29 and 30.

OUTDOOR ENTHALPY CONTROL (Fig. 30) — Outdoor enthalpy control requires only an enthalpy switch/receiver (33CSENTHSW). The enthalpy switch/receiver is mounted in the outdoor air inlet and calculates outdoor air enthalpy. The enthalpy switch/receiver energizes the relay output when the outdoor enthalpy is above 28 BTU/lb OR dry bulb tempera-ture is above 75 F and is deenergized when the outdoor enthalpy is below 27 BTU/lb AND dry bulb temperature is below 74.5 F. The relay output is wired to the unit economizer which will open or close depending on the output of the switch.

NOTE: The enthalpy calculation is done using an average alti-tude of 1000 ft above sea level.

Mounting — Mount the enthalpy switch/receiver in a location where the outdoor air can be sampled (such as the outdoor air intake). The enthalpy switch/receiver is not a NEMA 4 enclo-sure and should be mounted in a location that is not exposed to outdoor elements such as rain or snow. Use two field-supplied

no. 8 x 3/4-in. TEK screws. Insert the screws through the holes in the sides of the enthalpy switch/receiver.

Wiring — Carrier recommends the use of 18 to 22 AWG twisted pair or shielded cable for all wiring. All connections must be made with 1/4-in. female spade connectors.

A 24-vac transformer is required to power the enthalpy switch/receiver; as shown in Fig. 30, the PremierLink™ board provides 24 vac. Connect the GND and 24-vac terminals on the enthalpy switch/receiver to the terminals on the transformer.

On some applications, the power from the economizer harness can be used to power the enthalpy switch/receiver. To power the enthalpy switch/receiver from the economizer harness, con-nect power of the enthalpy switch/receiver to the red and brown wires (1 and 4) on the economizer harness.

For connection to rooftop units with PremierLink™ control, connect the LOW Enthalpy terminal on the enthalpy switch/re-ceiver to J4 — pin 2 of the PremierLink control on the HVAC (Heating, Ventilation, and Air Conditioning) unit. The switch can be powered through the PremierLink control board if de-sired. Wire the 24-vac terminal on the enthalpy switch/receiver to J4 — pin 1 on the PremierLink control. Wire the GND ter-minal on the enthalpy switch/receiver to J1 — pin 2 on the Pre-mierLink control. The HI Enthalpy terminal is not used. See Fig. 31.

DIFFERENTIAL ENTHALPY CONTROL (Fig. 32) — Differential enthalpy control requires both an enthalpy switch/ receiver (33CSENTHSW) and an enthalpy sensor (33CSENTSEN). The enthalpy switch/receiver is mounted in the outdoor air inlet and calculates outdoor air enthalpy. The enthalpy sensor is mounted in the return airstream and calcu-lates the enthalpy of the indoor air.

The enthalpy switch/receiver energizes the HI Enthalpy re-lay output when the outdoor enthalpy is greater than the indoor enthalpy. The LOW Enthalpy terminal is energized when the outdoor enthalpy is lower than the indoor enthalpy. The relay output is wired to the unit economizer which will open or close depending on the output of the switch.

NOTE: The enthalpy calculation is done using an average alti-tude of 1000 ft above sea level.

Mounting — Mount the enthalpy switch/receiver in a location where the outdoor air can be sampled (such as the outdoor air intake). The enthalpy switch/receiver is not a NEMA 4 enclo-sure and should be mounted in a location that is not exposed to outdoor elements such as rain, snow, or direct sunlight. Use two field-supplied no. 8 x 3/4-in. TEK screws. Insert the screws through the holes in the sides of the enthalpy switch/receiver.

Fig. 29 — Enthalpy Switch/Receiver Dimensions

(33CSENTHSW)

Fig. 30 — Enthalpy Sensor Dimensions

(33CSENTSEN)

a33-833tf a33-834tf

4-20mA

Fig. 31 — Typical Wiring Schematic — Carrier Rooftop Unit with PremierLink™ Controls

*Used with Differential Enthalpy Control only.

a33-9215

24 VAC OUTPUT FROM N/C CONTACT WHEN THE

OUTDOOR ENTHALPY IS LESS THAN THE

INDOOR ENTHALPY

(ENABLE ECONOMIZER)

24 VAC OUTPUT FROM N/O CONTACT WHEN THE

INDOOR ENTHALPY IS GREATER THAN THE

OUTDOOR ENTHALPY

(ENABLE ENERGYSRECYCLER)

24 VAC

SECONDARY

HI LOW GND 24

VACENTHALPY

4-20 mA

IN

24-36

VDC

OUT

JUMPER SETTINGS FOR 33CSENTHSW

M

M

M

0%

50%

100%

O F

F

33CSENTHSW

JUMPER SETTINGS FOR 33CSENTSEN

M

M

M

0%

50%

100%

O F

F

33CSENTSEN

24-36

VDC

IN

ORN

120 VAC

LINE VOLTAGE

4-20 mA

OUT

Fig. 32 — Differential Enthalpy Control Wiring

LEGEND

N/C — Normally Closed N/O — Normally Open a33-839tf

Mount the enthalpy sensor in a location where the indoor air can be sampled (such as the return air duct). The enthalpy sensor is not a NEMA 4 enclosure and should be mounted in a location that is not exposed to outdoor elements such as rain or snow. Use two field-supplied no. 8 x 3/4-in. TEK screws. Insert the screws through the holes in the sides of the enthalpy sensor.

Wiring — Carrier recommends the use of 18 to 22 AWG twisted pair or shielded cable for all wiring. All connections must be made with 1/4-in. female spade connectors.

The PremierLink™ board provides 24-vac to power the en-thalpy switch/receiver. Connect the GND and 24-vac terminals on the enthalpy switch/receiver to the terminals on the trans-former. On some applications, the power from the economizer harness can be used to power the enthalpy switch/receiver. To power the enthalpy switch/receiver from the economizer har-ness, connect power of the enthalpy switch/receiver to the red and brown wires (1 and 4) on the economizer harness.

Connect the LOW Enthalpy terminal on the enthalpy switch/receiver to J4 — pin 2 of the PremierLink control on the HVAC unit. The switch can be powered through the Premier- Link control board if desired. Wire the 24 vac terminal on the enthalpy switch/receiver to J4 — pin 1 on the PremierLink control. Wire the GND terminal on the enthalpy switch/ receiver to J1 — pin 2 on the PremierLink control. The HI Enthalpy terminal is not used. See Fig. 31.

Connect the 4-20 mA In terminal on the enthalpy switch/ receiver to the 4-20 mA Out terminal on the return air enthalpy sensor.