Unitary products group YMB Series Installation Manual

INSTALLATION MANUAL
R-22
OUTDOOR SPLIT-SYSTEM
HEAT PUMP
MODELS: 13 SEER - YMB / HC3A / HL3A SERIES
1.5 TO 5 TONS
GENERAL 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATIONS REQUIRING TXV . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Oil Trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Tubing Hanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CFM Selection Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Heat Pump Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
R-22 Saturated Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
TEST Input Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operational Mode Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Status Code Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
X/L Output Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operational Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sensor or Switch Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Wiring Related Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Defrost Initiate Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SECTION I: GENERAL
The outdoor units are designed to be connected to a matching indoor
coil with sweat connect lines. Sweat connect units are factory charged
with refrigerant for a matching indoor coil plus 15 feet of field supplied
lines.
Matching indoor coils are available with a thermal expansion valve or
an orifice liquid feed sized for the most common usage. The orifice size
and/or refrigerant charge may need to be changed for some indoor-out-
door unit combinations, elevation differences, or total line lengths. Refer
to Application Data covering "General Piping Recommendations and
Refrigerant Line Length" (Part Number 036-61920-001).
SECTION II: SAFETY
This is a safety alert symbol. When you see this symbol on
labels or in manuals, be alert to the potential for personal
injury.
Understand and pay particular attention to the signal words DANGER,
WARNING, or CAUTION.
DANGER indicates an imminently hazardous situation, which, if not
avoided, will result in death or serious injury.
Certification applies only

TABLE OF CONTENTS

EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
INSTRUCTING THE OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
LIST OF FIGURES
Demand Defrost Control Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Defrost Operation Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Hot Heat Pump Indoor Airflow Control . . . . . . . . . . . . . . . . . . . . . . . .14
Jumper Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
LIST OF TABLES
Air Handler Auxiliary Heat Functionality . . . . . . . . . . . . . . . . . . . . . . 16
Fossil Fuel Furnace Auxiliary Heat Functionality . . . . . . . . . . . . . . . 16
1-1/2 Ton Subcooling Charging Chart . . . . . . . . . . . . . . . . . . . . . . . 18
2 Ton Subcooling Charging Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2-1/2 Ton Subcooling Charging Chart . . . . . . . . . . . . . . . . . . . . . . . 18
3 Ton Subcooling Charging Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3-1/2 Ton Subcooling Charging Chart . . . . . . . . . . . . . . . . . . . . . . . 19
4 Ton Subcooling Charging Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5 Ton Subcooling Charging Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not
avoided may result in minor or moderate injury. It is also used to
alert against unsafe practices and hazards involving only property dam-
age
Improper installation may create a condition where the operation of
the product could cause personal injury or property damage.
Improper installation, adjustment, alteration, service, or mainte-
nance can cause injury or property damage. Refer to this manual
for assistance or for additional information, consult a qualified con-
tractor, installer, or service agency.
This product must be installed in strict compliance with the
enclosed installation instructions and any applicable local, state,
and national codes including, but not limited to building, electrical,
and mechanical codes.
R
P
LISTED
when the complete
system is listed
with ARI.
ISO 9001
Certified Quality
Management System
170761-UIM-B-0406