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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