Specifications

ManualsBrandsCarrier ManualsAir Compressor48/50PD05

HH57AC078

CRENTDIF004A00

Installation Instructions

ROOFTOP UNITS, 2 to 25 TONS

ACCESSORYENTHALPYSENSORAND

DIFFERENTIAL ENTHALPY SENSOR FOR

ECONOMI$ERt IV

TABLE OF CONTENTS

PACKAGE CONTENTS -- HH57AC078 1............

PACKAGE CONTENTS -- CRENTDIF004A00 1......

SAFETY CONSIDERATIONS 2....................

GENERAL 2....................................

Outdoor Enthalpy Changeover Control 2..................

Differential Enthalpy Control 2..........................

INSTALLATION 3...............................

Single Outdoor Air Enthalpy Sensor 3--6..................

Differential Enthalpy Sensor 7--10.......................

CONFIGURATION 11............................

Outdoor Enthalpy Changeover Control 11.................

Differential Enthalpy Control 11.........................

IMPORTANT: Read these instructions completely before

attempting to install the accessory enthalpy sensor.

PACKAGE CONTENTS --

HH57AC078

QTY CONTENTS

1 Enthalpy Sensor

CRENTDIF004A00

QTY CONTENTS

1 Enthalpy Sensor

2 6---20, 3/4 in. Sheet Metal Screw

1 Grommet

1 Black Wire

1 Red Wire

The HH57AC078 and CRENTDIF004A00 enthalpy

sensors are used with the Economi$er IV (part numbers

CRECOMZR008C00, 020A02, 021A03, 024A02,

025A02, 038A00, 039A00, 040A00, 041A00, 042A00,

046A00, 047A00, 050A00, 051A00, 056A00, 057A00,

062A00, 064A00) and are used on the following units:

UNIT SIZE UNIT SIZE

48HE 003---006 542J 150, 180

50HE 003---006 548F 036---120

50HEQ 003---006 549B 036---120

48HJ 004---028 549C 024---060

50HJ 004---028 551A 155---300

50HJQ 004---016 551B 036 ---150

48PD 05---06 551C 024 --- 060

50PD 05---06 558F 036 ---300

48PG 03---28 558J 04---16

50PG 03---28 559F 180---300

48PM 20---28 579F 180 ---300

50PM 20---28 580F 036 ---300

48TC 04---16 580J 04 ---16

50TC 04---16 581A 155 ---300

48TF 004 ---014 581B 036--- 150

50TFF 004---014 581C 024---060

50TCQ 04---14 548J 04---14

48HC 04---14 581J 04---14

50HC 04---14 551J 04---14

50HCQ 04---12 549J 04---12

50TFQ 004---012

48TJ

016---028

50TJ

016---028

48TM

004---028

50TM

004---028

The accessory enthalpy sensor can be used on all rooftop

units with a factory--installed or accessory Economi$er IV.

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

Catalog No:IIK---HH57CRENT--- 03

R e p l a c e s : I I K --- H H 5 7 C R E N T --- 0 2

Summary of content (11 pages)

PAGE 1
HH57AC078 CRENTDIF004A00 ROOFTOP UNITS, 2 to 25 TONS ACCESSORY ENTHALPY SENSOR AND DIFFERENTIAL ENTHALPY SENSOR FOR ECONOMI$ERt IV Installation Instructions TABLE OF CONTENTS PACKAGE CONTENTS - HH57AC078 . . . . . . . . . . . . 1 PACKAGE CONTENTS - CRENTDIF004A00 . . . . . . 1 SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Outdoor Enthalpy Changeover Control . . . . . . . . . . . . . . . . . .
PAGE 2
Table 1 – Economi$er IV Sensor Usage Outdoor Air Dry Bulb Economi$er IV WITH OUTDOOR AIR DRY BULB SENSOR Accessories Required None. The outdoor air dry bulb sensor is factory installed.
PAGE 3
INSTALLATION NOTE: The 48/50PD, PG, PM, TC, TCQ, HC, HCQ, 558J, 580J, 548J, 581J, 551J and 549J units have a choice of dry-- bulb or enthalpy sensor with the factory-- installed Economi$er IV.
PAGE 4
Single Outdoor Air Enthalpy Sensor Installation for 48/50PG20--28, 48/50PM20--28, 48/50HJ020--028 and 551A/581A210--300 Units N 2V P Min Pos T1 24 Vac HOT 24 Vac COM DCV Max 10V 2V 2V SO SR 1 2 5 DCV Set 10V SO+ SR+ _ DCV AQ DAMPER MOTOR ACCESS PANEL + Open T AQ1 HH57AC078, CRENTDIF004A00 TR1 Set 10V EXH P1 1. Turn off power to unit and install Lockout Tag. 2. Remove the damper motor access panel at the back of the unit. (See Fig. 3.) Save screws for use in Step 7.
PAGE 5
ECONOMI$ER IV CONTROLLER WIRING HARNESS ACTUATOR (HIDDEN) LOW TEMPERATURE COMPRESSOR LOCKOUT SWITCH OUTSIDE AIR TEMPERATURE SENSOR (OPERATING LOCATION) NOTE: This section assumes you are starting with an Economi$er IV installed in the rooftop and equipped with a dry bulb temperature sensor (p/n HH57AC074). If your Economi$er is already equipped with single enthalpy sensor (p/n HH57AC078), STOP. You do not need to continue with this section. C07367 Fig.
PAGE 6
Single Outdoor Air Enthalpy Sensor Installation for 48/50HJ015--017, 50HJQ014--016, 48/50TJ,TM016--028, 542J150--180, 551A/581A155--180, 558F/559F/579F/580F180--300 Units ECONOMI$ER IV HH57AC078, CRENTDIF004A00 NOTE: This section assumes you are starting with an Economi$er IV installed in the rooftop and equipped with a dry bulb temperature sensor (p/n HH57AC074). If your Economi$er is already equipped with a single enthalpy sensor (p/n HH57AC078), STOP. You do not need to continue with this section.
PAGE 7
4. If there is a pre-- existing differential enthalpy sensor, remove the sensor. To remove the sensor, disconnect the blue and orange wires from the differential enthalpy sensor and let them hang. They are used later to connect the differential enthalpy sensor. Remove the differential enthalpy sensor and save the screws for use in Step 5. 5. Locate screw holes in the Economi$er deck partition.
PAGE 8
Differential Enthalpy Sensor Installation for 48/50PG20--28, 48/50PM20--28, 48/50HJ020--028, and 551A/581A210--300 Units 4. If there is a pre-- existing differential temperature sensor, remove the sensor. To remove the sensor, disconnect the blue and orange wires from the differential temperature sensor and let them hang. They are used later to connect the differential enthalpy sensor. 5.
PAGE 9
3. Using the screws provided in the CRENTDIF004A00 kit, mount the differential enthalpy sensor in the return air duct as shown in Fig. 10. 4. Remove the 620-- ohm resistor that connects “SR+” and the “SR” terminals on the Economi$er IV controller. 5. Route the red and black wires (provided in the CRENTDIF004A00 kit) between the Economi$er IV controller and the installed location of the differential enthalpy sensor. 6.
PAGE 10
Differential Enthalpy Sensor Installation Instructions for 48/50HJ015--017, 50HJQ014--016, 48/50TJ,TM016--028, 542J150--180, 551A/581A155--180, 558F/559F/579F/580F180--300 Units 9. Re-- install the Economi$er hood using the screws from Step 2. 10. Restore power to the unit and configure the Economi$er IV controller per the Configuration section of this manual. 11. Depending on the type of panels the unit is equipped with: a.
PAGE 11
CONFIGURATION Outdoor Enthalpy Changeover Control When the outdoor air enthalpy rises above the adjustable free cooling/enthalpy changeover set point, the outdoor-- air damper moves to its minimum position. The free cooling/enthalpy changeover set point is set with the free cooling/enthalpy changeover set point potentiometer on the Economi$er IV controller. The set points are A, B, C, and D. (See Fig. 12 and 13.