Carrier 48MPD, Installation, Start-Up And Service Instructions Manual

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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
— 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 Configuration 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
48MPD,MPE62L-10R
50MP62L-10R
Single Package Electric Cooling Units
and Gas Heating/Electric Cooling Units
With Product Integrated Controls
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. 534-893 Printed in U.S.A. Form 48/50MP-1SI Pg 1 12-98 Replaces: 50MP-1SI