Carrier D Series Installation Instructions Manual

Auxiliary heater for air handler

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EHKMD

Auxiliary Heater for Air Handler D Series

Sizes 5KW to 25KW

Fig. 1 —Auxiliary Heater

NOTES: Read the entire instruction manual before

starting the installation.

Images are for illustration purposes only. Actual

models may differ slightly.

Installation Instructions

Specifications subject to change without notice.

TABLE OF CONTENTS

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

ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

ELECTRIC AUXILIARY HEAT MODULE INSTALLATION AND

WIRING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

ELECTRICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 11

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ELECTRICAL AUXILIARY HEATING WIRING DIAGRAM . . 13

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Summary of Contents for Carrier D Series

Page 1 EHKMD Auxiliary Heater for Air Handler D Series Sizes 5KW to 25KW Installation Instructions TABLE OF CONTENTS Page SAFETY CONSIDERATIONS ......2 ACCESSORIES .
Page 2 EHKMD: Installation Instructions SAFETY CONSIDERATIONS CAUTION Installing, starting up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures, etc.). EQUIPMENT DAMAGE HAZARD Only trained, qualified installers and service mechanics should install, Failure to follow this caution may result in equipment damage or start-up, and service this equipment.
Page 3 EHKMD: Installation Instructions NOTE: The unit’s circuit board (PCB) is designed with a fuse to provide overcurrent protection. The specifications of the fuse are printed on the WARNING circuit board, for example: T3.15AL/250VAC, T5AL/250VAC, T3.15A/ 250VAC, T5A/ 250VAC, T20A/250VAC, T30A/250VAC,etc. ELECTRICAL WARNING NOTE: Only the blast-proof ceramic fuse can be used.
Page 4 EHKMD: Installation Instructions Table 1 — Symbols Displayed on Indoor Unit or Outdoor Unit WARNING This symbol shows that this appliance used a flammable refrigerant. If the refrigerant is leaked and exposed to an WARNING FOR FLAMMABLE REFRIGERANTS external ignition source, there is a risk Do not use means to accelerate the defrosting process or to clean, other of fire.
Page 5 EHKMD: Installation Instructions ACCESSORIES The system is shipped with the following accessories. Use all of the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock and fire, or cause the equipment to fail. Keep the installation manual in a safe plane and do not discard any other accessories until the installation has been completed.
Page 6 EHKMD: Installation Instructions DIMENSIONS Table 4 — Dimensions and Weight 10KW 15KW 20KW 25KW System Size (208/230 V) inch 8.07 8.07 8.07 8.07 8.07 8.07 Height (H) inch 22.01 22.01 22.01 22.01 22.01 22.01 Width (W) inch 10.59 10.59 10.59 10.59 10.59 10.59...
Page 7 EHKMD: Installation Instructions DIMENSIONS (CONT.) Fig. 3 —Dimensions (Sizes 20K and 25K) Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Page 8 EHKMD: Installation Instructions INSTALLATION NOTE: Installation must be performed by an licensed contractor. Please make necessary precaution when performing the installation operation. PREPARATION FOR INSTALLATION Before installation, confirm the electric auxiliary heat module and supplied accessories are complete and free of any damage. Do not attempt to install if damage is present.
Page 9 EHKMD: Installation Instructions ELECTRIC AUXILIARY HEAT MODULE INSTALLATION AND WIRING OPERATION Step 1 - Open the Upper Cover Step 4 - Remove PCB Assembly Remove screws Disconnect connector the PCB assembly Fig. 8 —Remove PCB Assembly Step 5 - Remove and Dispose of Cover Remove screws Fig.
Page 10 EHKMD: Installation Instructions Step 7 - Hold the two handles together and push the Step 10 - Install the PCB back and reconnect the Auxiliary heater Horizontally into the Air Handler. connector. Fix the 3 screws. Fix screws Reconnect Fix screw Determine the installation direction of auxiliary heater based on the note of the...
Page 11 EHKMD: Installation Instructions ELECTRICAL SPECIFICATIONS NOTE: Electric auxiliary heating wiring diagram packed with the accessories. If branch circuit wire length exceeds 100ft, consult the local code to determine maximum wire length. Use 2% voltage drop. After the electric heating wiring is connected, confirm the following before power on: •...
Page 12 EHKMD: Installation Instructions WIRING DIAGRAM ELECTRIC AUXILIARY HEATING WIRING DIAGRAM AUX-HEAT CONTROL SIGNAL This wiring diagram is applicable to electric heater 5kW, 8kW, TO DATA BOARD CN14 10kW, 15kW, 20kW, and 25kW. Refer to the manual for detailed internal wiring. 2/3/4 REL AYS POWER B...
Page 13 EHKMD: Installation Instructions ELECTRICAL AUXILIARY HEATING WIRING DIAGRAM 5KW HEAT KIT :THERMAL LINK :THERMALCUT-OUT, SELF-RESET T ING Aux-Heat control signal TO I N DOORUNIT HEATER1 DATABOARD RELAY1 BLACK CN14 BLACK NOTE1: This symbol indicates the element is optional, The wiring type of the actual POWER B unit shall prevail.
Page 14 EHKMD: Installation Instructions 8KW/10KW HEAT KIT :THERMAL LINK :THERMALCUT-OUT, SELF-RESET T ING BLACK RELAY2 HEATER2 BLACK Aux-Heat control signal BLACK YELLOW TO I N DOORUNIT RELAY1 DATABOARD BLACK HEATER1 CN14 BLACK BLACK NOTE1: This symbol indicates the element is POWER B optional, The wiring type of the actual unit shall prevail.
Page 15 EHKMD: Installation Instructions 15KW HEAT KIT :THERMAL LINK :THERMALCUT-OUT, SELF-RESET T ING RELAY3 HEATER3 BLACK RELAY2 HEATER2 Aux-Heat control signal BLACK TO I N DOORUNIT DATABOARD RELAY1 HEATER1 CN14 NOTE1: This symbol indicates the element is optional, The wiring type of the actual POWE R B POWE R C unit shall prevail.
Page 16 EHKMD: Installation Instructions 20KW HEAT KIT BLACK :THERMAL LINK BLACK :THERMALCUT-OUT, SELF-RESET T ING RELAY4 HEATER4 BLACK BLACK BLACK HEATER3 RELAY3 BLACK BLACK RELAY2 HEATER2 Aux-Heat control signal BLACK BLU E YELLOW BLACK TO I N DOORUNIT DATABOA RD HEATER1 RELAY1 CN14 BLACK...
Page 17 EHKMD: Installation Instructions 25KW HEAT KIT :THERMAL LINK :THERMAL CUT-OUT, SELF-RESETTING BLACK TCO5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 BLACK 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8...
Page 18 EHKMD: Installation Instructions © 2024 Carrier. All rights reserved. Edition Date: 12/24 Catalog No: EHKMD-01SI Replaces: NEW Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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