Carrier 09DK054-084- User Manual

Installation, Start-Up and

Service Instructions

Part No. 09DK900004, 09DK900006

SAFETY CONSIDERATIONS

When installing this accessory, observe precautions in the

literature and on any labels attached to the equipment, and
all other safety precautions that may apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling and installing this accessory.

ELECTRIC SHOCK HAZARD

Separate power sources (main and control
circuit power) are used for these units. Be
sure both main power and control circuit
power are disconnected before installing the
Motormaster III Relay/Sensor Kit.

GENERAL

These instructions are for field installation of the acces-

sory Motormaster III Relay/Sensor kit. The kit is used to pro-
vide efficient control of the primary fans (fans 1 and 2) on
09DK condensers with 67/33%, 33/33/33%, and 33/33/17/
17% typical capacity split applications. On 67/33% appli-
cations, fan no. 2 is shared by the 67% and 33% refrigerant
circuits. With 33/33/33% and 33/33/17/17% applications, fan
no. 1 and 2 are shared by either the 33% or 17% refrigerant
circuits. This accessory ensures that the first circuits on and
the last circuits off control the Motormaster III device. One
kit is required for 67/33% applications. Two kits are re-
quired for 33/33/33% and 33/33/17/17% applications. See
Table 1 for voltage and kit number information.

Table 1 — Motormaster III Relay/Sensor

Kit Information

MAIN SUPPLY

VOLTAGE

MOTORMASTER III

RELAY/SENSOR PART NO.

208/230-3-60

09DK900004

460-3-60
575-3-60
380-3-60

09DK900006

380/415-3-50

INSTALLATION

Use these instructions in conjunction with the accessory

Motormaster III control installation instructions.

The accessory fan control kit must be used for efficient

unit operation with 67/33%, 33/33/33%, and 33/33/17/17%
capacity split applications. Refer to the fan control kit in-
stallation instructions for more information. Install the fan
control kit

before

installing the Motormaster III Relay/

Sensor kit.

Step 1 — Examine Package Contents —

Check

kit for shipping damage or missing parts. If damage is found,
file a claim with the shipping agency immediately. Each kit
includes a relay, a sensor, and the fastener hardware for in-
stallation. See Table 2 for kit contents. If any item is miss-
ing, notify your Carrier representative.

Table 2 — Motormaster III Relay/Sensor

Kit Contents

QUANTITY

ITEM

1

Relay

1

Sensor*

2

Pan Head Screw, Type B

(no. 6-20 x

3

⁄

4

in. long)

*Each Motormaster III accessory controller also comes with one

sensor.

Step 2 — Mount Relay in Control Box

1. Open control box door.
2. Remove and save 4 corner holddown screws and detach

control box cover.

3. Mount relay on the fan control kit control panel in the

control box using the screws provided. See Fig. 1 and 2
for specific locations. Each kit contains one relay. Two
kits are required for 33/33/33% and 33/33/17/17%
applications.

NOTE: For 67/33% applications, the relay (CR2A) is mounted
on the right side of the control panel. Relay CR1A is not
needed for 67/33% applications. See Fig. 1 and 2.

09DK054-084

Accessory Motormaster

T

III

Relay/Sensor Kit

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

Book 2
Tab

4a

PC 111

Catalog No. 530-957

Printed in U.S.A.

Form 09DK-8SI

Pg 1

5-93

Replaces: New