Carrier JK034-074 Manuel d'utilisateur télécharger pdf

Installation Instructions

Part No. 50DJ-902---801, 50DJ-902---811

CONTENTS

Page

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

INSTALLATION .............................1-8

Winter Start Recommendations ............. 5

WIND BAFFLE ............................ 9,10

GENERAL

The accessory Motormaster I (MMI) head pressure

controller is used to control the speed of the outdoor

(condenser) fan motor (OFM) (see Fig. 1 for OFM1 loca-

tion), permitting the unit to operate in cooling at down to

–20 F outdoor ambient. In order to accomplish this, it is also

necessary to install the accessory low-ambient kit and/or

winter start kit on some units. Refer to the unit price pages

for speciﬁc information on which kits to order, and to the

literature included with the accessory low-ambient and

winter start kits for their installation. Low-ambient and win-

ter start kit wiring details are included in this book as

appropriate.

NOTE: In addition, all 575-v units require installation of an

accessory transformer (Carrier part no. HT01AH954) not in-

cluded in this package. Refer to the accessory transformer

kit for wiring instructions for that accessory.

Table 1 shows MMI package numbers and usage, and

Table 2 shows the contents of each MMI accessory package.

INSTALLATION

1. Disconnect power to the unit.

2. Refer to Fig. 1. Disconnect outdoor (condenser) fan mo-

tor (OFM1) wiring at the motor junction box.

3. Remove OFM1 fan guard from the unit. Remove OFM1

with propeller fan from unit. Save all wires.

4. Remove rubber hub cap and propeller from OFM1 mo-

tor shaft and keep parts for installation on the speed con-

trol motor.

Table 1 — Motormaster I Package Numbers and Usage

PACKAGE NO.

UNIT SERIES

NO.

UNIT

V-Ph-Hz

MOTOR

V-Ph-Hz

50DJ-902---801

1--

5--

208/230-3-60

575-3-60

208/230-1-60

50DJ-902---811 6-- 460-3-60 208/230-1-60

Table 2 — Motormaster 1 Package Contents

ITEM DESCRIPTION

ITEM QUANTITY

ITEM PART NUMBER

50DJ-902---801* 50DJ-902---811

Motormaster I Controller with Sensor (8-ft wire) 1 1 32LT-900---301

Motor, Outdoor Fan 1 1 HC52AE-235

Capacitor, 50 mfd 1 1 HC91CA-050

Boot, Capacitor 1 1 HC97ZZ-075

Strap, Capacitor 1 1 HC98ZZ-050

Spacer, Motor Mount 1 1 30GX500698

Fastener Package 11 —

Transformer, 460/230 V — 1 HT01AH-852

LEGEND

mfd — Microfarad

*ForMotormasterIheadpressurecontroldeviceoperation,575-vunits

require installation of a transformer (Carrier part no. HT01AH-954)

not included in this accessory package.

48FJ,FK,JJ,JK034-074

50FJ,FK,FW,FY,JJ,JK,JW,JY034-104

Accessory MotormasterT I Head Pressure Controller

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

Book 1 1

Tab 1a 1b

PC 111 Catalog No. 564-981 Printed in U.S.A. Form 48/50F,J-1SI Pg 1 5-99 Replaces: New

1 2 3 4 5 6 ... 11 12

Résumé du contenu

Page 1 - Installation Instructions

Installation InstructionsPart No. 50DJ-902---801, 50DJ-902---811CONTENTSPageGENERAL ... 1INSTALLATION ...

Page 2 - Fig. 1 — Location of OFM1

NOTE: Dimensions shown in ( ) are in millimeters.UNITSIZEDIMENSIONSAB C D E Fin. mm in. mm in. mm in. mm in. mm in. mm034 and 038 10 254 59 1500 44 11

Page 3

MOTORMASTERT I CONTROLLER MOUNTING TEMPLATENOTE: Dimensions in ( ) are in millimeters.CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE---------------------

Page 4

Page 5

074 AND 078 UNITS 088 AND 104 UNITSLEGENDOFM — Outdoor (Condenser) Fan MotorNOTE: All views are from the top of the unit.Fig. 1 — Location of OFM1034

Page 6 - Size 054-078 Units

5. Replace the existing motor mount spacer (see Fig. 2)with motor mount spacer provided in the accessorypackage.6. Install speed control motor in plac

Page 7 - Size 088 and 104 Units

12. Mount the Motormaster I controller on the partition nextto the capacitor. The controller must be mounted verti-cally with the leads coming out the

Page 8 - CONSTANT VOLUME

19. 460-volt units only — A stepdown transformer is sup-plied with the 50DJ-902---811 package and must be in-stalled as described below:Transformer is

Page 9 - WIND BAFFLE

Fig. 9 — MotormasterT I Control Sensor Location,Size 044 and 048 Units074 ONLY CONTROL BOXCIRCUIT NO. 1 COILSENSORLOCATION COILHEADER ENDFig. 10

Page 10 - Tab 1a 1b

CONTROL BOXCIRCUIT NO. 1 COILSENSORLOCATIONCOIL HEADER END COILHEADER ENDFig. 11 — MotormasterT I Control Sensor Location,Size 088 and 104 Units

Page 11

SIZE 034, 038 SIZE 044, 048Fig. 13 — Circuit 1 Evaporator Suction Headers forFreeze Protection Thermostat Location, Size 034-048 UnitsFig. 14 — Circui

Page 12

WIND BAFFLEFor low-ambient duty, a baffle should be installed in frontof the condenser coil to prevent cross currents from causingabnormal operation.