Optional Economi$Er Iv And Economi$Er2 - Carrier 50HE003-006 Installation Instructions Manual

Single-package rooftop electric cooling units with optional electric heat

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Table of Contents

Enlarged version

1. Use a 4-conductor, 18 or 20 AWG cable to connect the

enthalpy control to the PremierLink™ controller and

power transformer.

2. Connect the following 4 wires from the wire harness

located in rooftop unit to the enthalpy controller:

a. Connect the BRN wire to the 24 vac terminal (TR1) on

enthalpy control and to pin 1 on 12-pin harness.

b. Connect the RED wire to the 24 vac GND terminal (TR)

on enthalpy sensor and to pin 4 on 12-pin harness.

c. Connect the GRAY/ORN wire to J4-2 on PremierLink

controller and to terminal (3) on enthalpy sensor.

d. Connect the GRAY/RED wire to J4-1 on PremierLink

controller and to terminal (2) on enthalpy sensor.

NOTE: If installing in a Carrier rooftop, use the two gray wires

provided from the control section to the economizer to connect

PremierLink controller to terminals 2 and 3 on enthalpy sensor.

Return Air Enthalphy Sensor

Mount the return-air enthalpy sensor (HH57AC078) in the

return-air duct. The return air sensor is wired to the enthalpy

controller (HH57AC077). The outdoor enthalpy changeover set

point is set at the controller.

ENTHALPY CONTROLLER

RED

BRN

TR1

GRAY/ORN

LED

GRAY/RED

NOTES:

1. Remove factory-installed jumper across SR and + before connecting

wires from return air sensor.

2. Switches shown in high outdoor air enthalpy state. Terminals 2 and 3

close on low outdoor air enthalpy relative to indoor air enthalpy.

3. Remove sensor mounted on back of control and locate in outside air-

stream.

Fig. 25 --- Outdoor and Return Air Sensor Wiring

Connections for Differential Enthalpy Control

To wire the return air enthalpy sensor, perform the following (See

Fig. 25):

1. Use a 2- -conductor, 18 or 20 AWG, twisted pair cable to

connect the return air enthalpy sensor to the enthalpy

controller.

2. At the enthalpy control remove the factory-installed

resistor from the (SR) and (+) terminals.

3. Connect the field-supplied RED wire to (+) spade

connector on the return air enthalpy sensor and the (SR+)

terminal on the enthalpy controller. Connect the BLK wire

to (S) spade connector on the return air enthalpy

and the (SR) terminal on the enthalpy controller.

(OUTDOOR

AIR

ENTHALPY

BLK

SENSOR)

RED

(RETURN AIR

ENTHALPY

SENSOR)

WIRE HARNESS

IN UNIT

C06019

sensor

HH57AC078 ENTHALPY

SENSOR (USED WITH

ENTHALPY CONTROL

FOR DIFFERENTIAL

ENTHALPY OPERATION)

Fig. 26 --- Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

WIRING

HARNESS

ACTUATOR

Fig. 27 --- EconoMi$er IV Component Locations

ECONOMI$ER2

PLUG

BAROMETRIC

RELIEF

DAMPER

Fig. 28 --- EconoMi$er2 Component Locations