Carrier MOTORMASTER 48/50P4 Specifications download pdf

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

Catalog No. 04-53480084-01 Printed in U.S.A. Form 48/50A-14SI Pg 1 3-11 Replaces: 48/50A-10SI

Installation Instructions

Part Numbers: CRLOWAMB018A00 THROUGH CRLOWAMB026A00

CONTENTS

Page

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Step 1 — Install Field-Fabricated Wind Baffles . . . 3

Step 2 — Mounting and Electrical Connections

for Motormaster® V Control. . . . . . . . . . . . . . . . . . . . 5

Step 3 — Configure Motormaster V Control . . . . . 12

Step 4 — Test Motormaster V Control . . . . . . . . . . . 12

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14

TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . .14,15

GENERAL

This book contains instructions for the installation, start-up,

and service of the Motormaster V (MMV) control on

48/50A020-060 units.

SAFETY CONSIDERATIONS

Installation, start-up, and servicing of this equipment can be

hazardous due to system pressures, electrical components, and

equipment location (roofs, elevated structures, etc.).

Only trained, qualified installers and service technicians

should install, start up, and service this equipment.

When working on this equipment, observe precautions in

the literature and on tags, stickers, and labels attached to the

equipment and any other safety precautions that may apply.

INTRODUCTION

The Motormaster V control is a motor speed control device

which adjusts condenser fan motor speed in response to varying

liquid refrigerant pressure. A properly applied Motormaster V

control extends the operating range of air-conditioning systems

and permits operation at lower outdoor ambient temperatures.

To operate these units at very low ambient temperatures,

Motormaster V controls (Fig. 1) must be added. Field-fabricated

and installed wind baffles are also required for units in areas with

prevailing winds of more than 5 mph and where temperatures

drop below 32 F. The Motormaster V control permits operation

of the unit to an ambient temperature of –20 F (–29 C). The con-

trol regulates the speed of one 3-phase fan motor (2 fans for 40 to

60 ton units) that is compatible with the control. Replacement of

fan motor on most units is not necessary since the control is com-

patible with the factory-installed fan motors. To verify that unit

fan motors are compatible with control see Table 1.

See Tables 2A-2C and 3 for the Motormaster V control acces-

sory package usage and contents. Field wiring of control is re-

quired.

WARNING

Open all remote disconnects before servicing this equip-

ment. Electrical shock could result in personal injury.

48/50A2,A3,A4,A5,AJ,AK,AW,AY020-060

Low Ambient Operation

MOTORMASTER

V Control Accessory

50/60 Hz

256

12 13A

13B

13C

TO MOTOR(S)

BLK

YEL

BLU

FROM FUSE BLOCK

TO PRESSURE

TRANSDUCER

1256 1

2 14 13A 13B 13C 15 25 2 30 31 TXA

TXB

COM

+5V

TERMINAL

BLOCK

B-

B+

PRESSURE

TRANSDUCER

Fig. 1 — Motormaster® V Control

NOTE: Wire colors for MMPT:

2 — BLACK (A)

5 — GREEN (C)

6 — RED (B)

1 2 3 4 5 6 ... 15 16

Summary of Contents

Page 1 - Installation Instructions

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

Page 2

1048/50A2,A3,A4,A5060 MCHX UNITS — Two Motormas-ter® controls are used to control two independent outdoor-fanmotors. The refrigerant circuit A Motorm

Page 3 - INSTALLATION

11OFM - 1MMV-BL1L2L3T1T2 T3B- B+BLKBLKBLUYEL11 12 132223211256111221413A13B13C 1559FR-BMMPT-B230-3-60 SHOWN.REFER TO TABLE 4 FORALTERNATE VOLTAGECONNE

Page 4 - SIZES 036-050 AND

12i. Run the FR-B cable through the 1/2-in. connectorof the MMV-B enclosure (do not tighten connectorscrews at this time). Connect black wire to MMV-B

Page 5

13Table 5 — Program Parameters for the Operating ModeLEGENDPARAMETERS DESCRIPTION MODE 1 MODE 2 MODE 4P01 Line Voltage: 01 = low line, 02 = high line

Page 6 - FAN RELAY

144. Press MODE to display present parameter setting. Theupper right decimal point blinks. Use UP and DOWNbuttons to scroll to the desired parameter n

Page 7 - OR S9 VFD

15Table 6 — Fault CodesThe drive is programmed to automatically restart after a fault and will attempt to restart three timesafter a fault (the drive

Page 8

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

Page 9

2Table 1 — Applicable Voltages and MotorsTable 2A — Motormaster® V Control Package Contents — 48/50AJ,AK,AW,AY020-060 Units (R-22)Table 2B — Motormast

Page 10

3Table 2C — Motormaster® V Control Package Contents — 48/50A2,A3,A4,A5060 MCHX Units (R-410A)Table 3 — Motormaster V Control Package Usage

Page 11 - CIRCUIT A

4Fig. 2 — Wind Baffle DetailsNOTE: 48/50A2,A3,A4,A5060 units with MCHX do not requirebaffles. LEGENDMCHX — Microchannel Heat E

Page 12

5Step 2 — Mounting and Electrical Connec-tions for Motormaster® V Control For 48/50A2,A3,A4,A5,AJ,AK,AW,AY020-035 units, theMotormaster controlled ou

Page 13

6UNIT48/50A2,A3,A4,A5,AJ,AK,AW,AYFAN ARRANGEMENT FAN NO. NORMAL CONTROL020-0351 MMV2Shut OFF at 55 F and turn ON at 65 F outdoor-air temperature036-05

Page 14 - TROUBLESHOOTING

7FAN RELAY BFUSE BLOCK BFUSE BLOCK AFAN RELAY AFAN RELAYFUSE BLOCKFig. 4 — Fuse Block and Fan Relay Mounting (cont)48/50A2,A3,A4,A5,AJ,AK,AW,AY036-051

Page 15 - Table 6 — Fault Codes

8E3VFDMMVCONTROLE3VFDMMVCONTROLFig. 6 — MMV Control Mounting with 25 Hp 575-v E3 VFDFig. 7 — MMV Control Mounting with 30 or 40 Hp 575-v E3 VFD

Page 16

9OFM - 1MMVL1L2L3T1T2 T3B- B+BLKBLKBLUYEL11 12 132223211256111221413A13B13C 1559FRMMPT230-3-60 SHOWN.REFER TO TABLE 4 FORALTERNATE VOLTAGECONNECTIONSF

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Carrier MOTORMASTER 48/50P4 Specifications

Browse online or download Specifications for Split-system air conditioners Carrier MOTORMASTER 48/50P4. Carrier MOTORMASTER 48/50P4 Specifications [en] User Manual

Summary of Contents

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