Carrier 50MP62L-10R specifications Installation, Start-Upand Service Instructions, Contents

48MPD,MPE62L-10R 50MP62L-10R Single Package Electric Cooling Units

and Gas Heating/Electric Cooling Units With Product Integrated Controls

Installation, Start-Up and Service

Instructions

CONTENTS

	Page
GENERAL	2
SAFETY CONSIDERATIONS	2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unit Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Slab Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Field-Fabricated Ductwork . . . . . . . . . . . . . . . . . . 3

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Condensate Drains . . . . . . . . . . . . . . . . . . . . . . . . . 3

Condensate Coil Shipping Covers . . . . . . . . . . 3

Install Outdoor Hoods . . . . . . . . . . . . . . . . . . . . . . 3

Make Electrical Connections . . . . . . . . . . . . . . . . 14

· POWER SUPPLY

Field Electrical Connections . . . . . . . . . . . . . . . . 14

· POWER WIRING

Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

·SENSORS

·HUMIDITY CONTROL AND HOT WATER AND STEAM VALVES

·SPACE TEMPERATURE SENSOR (T55)

·SPACE TEMPERATURE SENSOR (T56) (CV Applications Only)

·SPACE TEMPERATURE AVERAGING

·HEAT INTERLOCK RELAY (VAV Units Only Ð Not Necessary For DAV Applications)

·OPTION AND ACCESSORY CONTROL WIRING

Carrier Comfort Network Interface . . . . . . . . . . 23

Air Pressure Tubing . . . . . . . . . . . . . . . . . . . . . . . . 24

Gas Piping (48 Series Units Only) . . . . . . . . . . . . 26

Installing Flue/Inlet Hoods

(48MP Units Only) . . . . . . . . . . . . . . . . . . . . . . . . . 26

Fan Isolator Adjustment . . . . . . . . . . . . . . . . . . . . 27

Check Compressor Mounting . . . . . . . . . . . . . . . 27

Install Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 27

PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-38

System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Evaporator-Fan Belts, Pulleys,

and Sheaves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Controls Con®guration and Quick Test . . . . . . 35

·SUPPLY FAN STATUS SWITCH (FS)

·CHECK FILTER SWITCH (CFS)

·ENTHALPY CONTROL SET POINT

·KEYPAD AND DISPLAY MODULE (HSIO) CONFIGURATION

·SET UNIT TYPE

·ENTER JOB SET POINT VALUES

·CONFIGURE UNIT CONTROLS AND FUNCTIONS

·QUICK TEST FUNCTION

Page

Gas Pressure Check . . . . . . . . . . . . . . . . . . . . . . . . 38

Check Supply Fan Rotation . . . . . . . . . . . . . . . . . 38

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-42

Initial Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Operating Sequences . . . . . . . . . . . . . . . . . . . . . . 39

·SUPPLY FAN

·ECONOMIZER

·COOLING (All Units)

·OCCUPIED COOLING

·UNOCCUPIED COOLING

·OVERRIDES

·ADAPTIVE OPTIMAL START

·ADAPTIVE OPTIMAL STOP (CV Applications Only)

·GAS HEATING, OPERATION (48MP Units Only)

Control Loop Checkout . . . . . . . . . . . . . . . . . . . . . 41

IAQ Control Loop Adjustment . . . . . . . . . . . . . . . 42

Lead/Lag Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Final Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

CONTROL SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . 42-45

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

·PROCESSOR MODULE NO. 1

·PROCESSOR MODULE NO. 2

·HIGH-VOLTAGE RELAY MODULES (DSIO)

·KEYPAD AND DISPLAY MODULE (HSIO)

Default Set Points/Changing Set Points . . . . . 43 Motor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Variable Frequency Drive (VFD) . . . . . . . . . . . . . 43

· DISPLAY AND KEYPAD

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45-55 Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

·UNIT CONTROL BOX

·COMPRESSORS

·LIQUID SERVICE VALVES, SOLENOID VALVES, FILTER DRIERS, AND SIGHT GLASSES

·EVAPORATOR-FAN MOTORS, PULLEYS, AND BELTS

·POWER EXHAUST MOTORS, PULLEYS, AND BELTS

·GAS HEAT SECTION

·UNIT CONTROL BOX

·ECONOMIZER DAMPER MOTORS

·RETURN-AIR FILTERS

·CONDENSER FANS AND FAN MOTORS

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

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

Book	1	1	PC 111	Catalog No. 534-893	Printed in U.S.A.	Form 48/50MP-1SI	Pg 1	12-98	Replaces: 50MP-1SI
Tab	1a	1b