2
TABLE OF CONTENTS
TO THE INSTALLER ........................................................
3
SHIPPING INSPECTION ...................................................
3
Checking Products Received ....................................
3
Message to the Homeowners ....................................
3
REPLACEMENT PARTS ...................................................
3
Ordering Parts ...............................................................
3
IMPORTANT SAFETY INSTRUCTIONS ........................
3
Recognize Safety Symbols, Words, and Labels ...
3
CODES AND REGULATIONS ...........................................
3
General .........................................................................
3
EPA Regulations ..........................................................
3
National Codes ............................................................4
MAJOR COMPONENTS ..................................................4
INSTALLATION ................................................................4
Pre-Installation Checks ...............................................4
Clearances and Accessibility ..................................4
Ground Level Pre-Installation Details ..................5
Unit location ................................................................4
Roof Top Installation ................................................5
Roof Curb Installations ............................................5
Rigging Details ............................................................5
CIRCULATING AIR AND FILTERS.................................
6
Air flow Conversion ..................................................
6
Duct work .....................................................................
6
Manufactured Home MOD Kit ...................................
6
Plenum Application .....................................................
7
FILTERS ............................................................................
7
CONDENSATE DRAIN PIPING ......................................
7
ELECTRICAL WIRING ....................................................
8
High Voltage Wiring ...................................................
8
Low Voltage Wiring ....................................................
8
Internal Wiring ...........................................................
9
STARTUP, ADJUSTMENTS, AND CHECKS .................
9
Air Conditioners Start-Up Procedures .................
9
Heat Pump Start-Up Procedure ................................
9
Final System Checks ................................................10
COMPONENTS ..............................................................10
Contactor ...................................................................10
Crankcase Heater .....................................................10
Condensor Motor .....................................................10
Compressor ................................................................10
Contactor Relay .......................................................10
Defrost Control .......................................................10
Outdoor Thermostat ................................................10
Reversing Valve Coil ................................................10
Indoor Blower Motor ..............................................10
Blower Interlock Relay ..........................................10
HEAT PUMP OPERATION ...............................................11
Cooling Cycle ............................................................11
Heating Cycle.............................................................11
Defrost Control .......................................................12
SUGGESTED FIELD TESTING/
TROUBLESHOOTING ..............................................12
Testing Defrost Control ........................................12
A
IRFLOW MEASUREMENT AND ADJUSTMENT ......12
Total External Static Pressure ............................13
AIR FLOW ADJUSTMENTS FOR
INDOOR BLOWER MOTOR .......................................13
ECM Motor Speed Adjustment ...............................13
DP5HM Dip Switch Functions ..................................13
DP5HM CFM Delivery and Adjustments ................13
DP5HM Thermostat “Fan Only” Mode ....................13
DP5HM Humidity Control ........................................13
SUPERHEAT AND SUBCOOLING ..................................13
Checking Subcooling ...............................................13
Checking Superheat .................................................14
Refrigerant Charge Check .....................................14
Units with TXV Devices .............................................14
ELECTRICAL HEAT INSTALLATION AND
ADJUSTMENT ..............................................................14
H
eater Kit ...................................................................14
MAINTENANCE ...............................................................15
SERVICE ..........................................................................15
Inadequate Air Volume Through Indoor Coil .....15
Outside Air into Return Duct ................................15
Undercharge .............................................................15
Poor “Terminating” Sensor contact ...................15
Malfunctioning Reversing Valve 12 ......................15
REVERSING VALVE TROUBLESHOOTING ..................15
TROUBLESHOOTING CHART .....................................17
DP5HM BLOWER PERFORMANCE DATA ....................18
DP5HM CFM OUTPUT AND DIP SWITCH SETTINGS ...19
DIMENSIONS .................................................................20
HOWEOWNER’S ROUTINE MAINTENANCE .............21
START-UP CHECKLIST ................................................22
WARNING
Only individuals meeting (at a minimum) the requirements
of an “entry level technician” as a specified by the air-
conditioning, heating and Refrigeration Institute (AHRI) may
use this information. Attempting to install or repair this
unit without such background may result in product damage,
personal injury or death.
TO THE INSTALLER
Carefully read all instructions for the installation prior
to installing unit. Make sure each step or procedure is
understood and any special considerations are taken into
account before starting installation. Assemble all tools,
hardware and supplies needed to complete the installation.
Some items may need to be purchased locally. After
deciding where to install unit, closely look the location
over - both the inside and outside of home. Note any
potential obstacles or problems that might be encountered
as noted in this manual. Choose a more suitable location if
necessary.
IMPORTANT NOTE: If a crankcase heater is used,
the unit should be energized 24 hours prior
to compressor start up to ensure crankcase
heater has sufficiently warmed the compressor.
Compressor damage may occur if this step is not
followed.
