Johnson Controls YFK Series Installation Manual

INSTALLATION MANUAL
R-410A 2-STAGE OUTDOOR
SPLIT-SYSTEM AIR CONDITIONING
MODELS: 17 & 19 SEER
YFK, CC17, TC17,
YXT, AC19, AL19 SERIES
2 - 5 TONS - 1 PHASE
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
COIL METERING DEVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Typical Installation Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Alternative Installation Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Insulation of Vapor Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
TXV Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
TXV Bulb and Equalizer Line Installations . . . . . . . . . . . . . . . . . . . . . .7
Proper TXV Bulb Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Vertical Temperature Bulb Orientation . . . . . . . . . . . . . . . . . . . . . . . . .7
System Charging Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Outdoor Unit Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Typical 2-Stage Conventional Field Wiring - AC . . . . . . . . . . . . . . . .11
Typical Communicating Field Wiring (Air Handler / Furnace) . . . . . .11
Minimum / Maximum Operating Limit Conditions . . . . . . . . . . . . . . . . .2
R-410A Saturation Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Status Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
IMPORTANT: It is recommended before starting the system to con-
nect the thermostat to Wi-Fi using a local network or portable hot-
spot so the thermostat and system receive the latest software
updates to optimize system performance only if using this in commu-
nicating configuration. This notice does not apply to conventionally
wired equipment.
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 nominal sized matching indoor coil plus 15 feet of
field-supplied lines.
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.
Johnson Controls Ducted Systems
LIST OF SECTIONS
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
INSTRUCTING THE OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
START UP SHEET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
LIST OF FIGURES
Conventional Low Voltage Molex Plug . . . . . . . . . . . . . . . . . . . . . . . 12
Communicating Low Voltage Molex Plug (19 SEER) . . . . . . . . . . . . 12
Demand Response Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
19 SEER 2-Stage Only Using Communicating Interface Control . . . 13
Thermostat Chart - Two Stage AC - Two Stage Furnace . . . . . . . . 14
Thermostat Chart - Two Stage AC - Two Stage Furnace . . . . . . . . 15
Thermostat Chart - Two Stage AC - Modulating Furnace . . . . . . . . 16
Thermostat Chart - Two Stage AC - Modulating Furnace . . . . . . . . 17
Thermostat Chart - Two Stage AC - Variable Speed Air Handler . . 18
Thermostat Chart - Two Stage AC - Variable Speed Air Handler . . 19
17 SEER 2-Stage Equipment - Wiring Diagram . . . . . . . . . . . . . . . . 24
19 SEER 2-Stage Equipment - Wiring Diagram . . . . . . . . . . . . . . . . 25
LIST OF TABLES
Status Code Display & Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Fault Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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
®
WARNING
!
CAUTION
!
CAUTION
!
Must Be Rated
for R-410A.
5512532-UIM-D-0320