835966-UIM-E-0814
OUTDOOR SPLIT-SYSTEM HEAT PUMP
MODELS:
16 SEER - YZF, HC6B, HL6B SERIES
18 SEER - YZH, HC8B, HL8B SERIES
2 TO 5 TONS
INSTALLATION MANUAL
®
LIST OF SECTIONS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INDOOR EXPANSION DEVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SYSTEM START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
SYSTEM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
INSTRUCTING THE OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF FIGURES
Typical Installation with Required Clearances . . . . . . . . . . . . . . . . . . . . . . 2
Tubing Hanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Communications Harness Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Communicating HP with Communicating Air Handler or Furnace . . . . . . . 8
Communicating HP with Non-Communicating Air Handler
or Furnace using Communicating Interface Control . . . . . . . . . . . . . . . . . . 8
Multi-wire Terminal Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . 10
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – Single Stage Furnace (X-13) . . . . . . . . . . . . . . . . . 11
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – V/S Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – PSC Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Thermostat Wiring – Single Stage Heat Pump
(with YGVI control) – V/S Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Thermostat Wiring – Two-Stage Heat Pump -
Two-Stage Variable Speed Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Thermostat Wiring – Two-Stage Heat Pump -
Two-Stage Variable Speed Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Air Handler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Thermostat Wiring – Two-Stage Heat Pump -
Variable Speed Modulating Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Heat Pump Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Wiring Diagram - Single Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Wiring Diagram - 2 Stage with PSC Outdoor Fan Motor . . . . . . . . . . . . . 24
Wiring Diagram - 2 Stage with ECM Outdoor Fan Motor . . . . . . . . . . . . . 25
LIST OF TABLES
Maximum / Minimum Operating Limit Conditions . . . . . . . . . . . . . . . . . 2
R-410A Saturation Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Defrost Initiate Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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 the smallest rated indoor coil plus 15 feet of field
supplied lines.
Matching indoor coils require a thermostatic expansion valve. The
refrigerant charge may need to be changed for some indoor-outdoor
unit combinations, elevation differences, or total line lengths. Refer to
Application Data covering “General Piping Recommendations and
Refrigerant Line Length” (Part Number 247077).
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
.
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 maintenance
can cause injury or property damage. Refer to this manual for assis-
tance or for additional information, consult a qualified contractor,
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-410A systems operate at higher pressures than R-22 systems. Do
not use R-22 service equipment or components on R-410A equip-
ment. Service equipment
Must Be Rated
for R-410A.
