Johnson Controls 18 SEER - CZH Installation Manual

INSTALLATION MANUAL
R-410A
OUTDOOR SPLIT-SYSTEM
AIR CONDITIONING
MODELS: 18 SEER - CZH / AC8B / AL8B SERIES
2 TO 5 TONS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TXV INSTALLATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Tubing Hanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Underground Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Heat Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Field Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Communications Harness Connection . . . . . . . . . . . . . . . . . . . . . . . . . 6
CFM Selection Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Communicating AC with Communicating Air Handler or Furnace . . . . 7
Communicating AC with Non-Communicating Air Handler
or Furnace using Communicating Interface Control . . . . . . . . . . . . . . . 7
R-410A Saturation Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
TEST Input Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operational Mode Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Status Code Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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 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 system
combinations, elevation differences, or total line lengths. See Tabular
Data Sheet provided in unit literature packet for charge requirements.
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.
WARNING indicates a potentially hazardous situation, which, if not
avoided, could result in death or serious injury.

TABLE OF CONTENTS

EVACUATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
SYSTEM CHARGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Instructing the Owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
LIST OF FIGURES
Thermostat Chart - Two Stage AC -
Two Stage Variable Speed Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . .8
Thermostat Chart - Two Stage AC -
Two Stage Variable Speed Furnaces . . . . . . . . . . . . . . . . . . . . . . . . . .9
Thermostat Chart - Two Stage AC - Variable Speed Furnaces . . . . .10
Thermostat Chart - Two Stage AC - Variable Speed Furnaces . . . . .11
Thermostat Chart - Two Stage AC - Variable Speed Furnaces . . . . .12
Thermostat Chart - Two Stage AC - Variable Speed Furnaces . . . . .13
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
LIST OF TABLES
Status Code Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Operational Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Sensor or Switch Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Wiring Related Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
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-410A systems operate at higher pressures than R-22 systems.
Do not use R-22 service equipment or components on R-410A
equipment. Service equipment
ISO 9001
Certified Quality
Management System
Must Be Rated
for R-410A.
501562-UIM-A-0909