Installation Guide
page 2
18-HD72D1-1
1. Safety
NOTE: Use 18-gauge color-coded thermostat cable for
proper wiring. Shielded cable is not typically required.
Keep this wiring at least one foot away from large inductive
loads such as Electronic Air Cleaners, motors, line starters,
lighting ballasts and large distribution panels.
Failure to follow these wiring practices may introduce
electrical interference (noise) which can cause erratic
system operation.
All unused thermostat wire to be grounded at indoor unit
chassis ground only. Shielded cable may be required if the
above wiring guidelines cannot be met. Ground only one
end of the shield to the system chassis.
▲
WARNING
!
This information is intended for use by individuals
possessing adequate backgrounds of electrical and
mechanical experience. Any attempt to repair a central
air conditioning product may result in personal injury and/
or property damage. The manufacturer or seller cannot
be responsible for the interpretation of this information,
nor can it assume any liability in connection with its use.
▲
WARNING
!
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and troubleshooting
of this product, it may be necessary to work with live
electrical components. Failure to follow all electrical safety
precautions when exposed to live electrical components
could result in death or serious injury.
1. Safety ...................................................................... 2
2. Product Specifications .......................................... 3
3. General Information ............................................... 3
3.1 Overview ....................................................... 3
3.2 Features ........................................................ 3
3.3 Contents ........................................................ 3
4. Installation .............................................................. 4
4.1 Location ......................................................... 4
4.2 Network Connections .................................... 4
4.3 Mounting ....................................................... 4
4.4 Wiring ............................................................ 5
4.5 Heating and Cooling Applications ................. 7
4.6 Heat Pump Applications .............................. 14
4.7 Dual Fuel Applications ................................ 18
5. System Setup ....................................................... 21
5.1 Power-Up Sequence ................................... 21
5.2 Open ........................................................... 21
5.3 Installer Settings .......................................... 21
5.3.1 Installer Presets .......................................... 21
5.3.2 Installer Setup Standard Settings ................ 23
5.3.3 Advanced Settings — Equipment ................ 23
5.3.4 Advanced Settings — Accessories ............. 23
5.3.5 Advanced Settings — Comfort .................... 24
5.3.6 Advanced Settings — Airflow ...................... 25
5.3.7 Advanced Settings — Sensors .................... 26
5.3.8 Advanced Settings — Lockouts................... 26
5.4 Reminders ................................................... 26
5.5 Dealer Code ................................................ 26
6. Basic Operation ................................................... 29
6.1 PI Control .................................................... 29
6.2 Load Value................................................... 29
6.3 Duty Cycles ................................................. 29
6.4 Overshoot Clamp ........................................ 29
6.5 Stage Thresholds ........................................ 29
6.6 Stage Inhibits .............................................. 30
6.7 Aggressive Recovery .................................. 30
6.8 System Mode .............................................. 30
6.9 Fan Mode .................................................... 30
6.10 Air Cleaner Mode ........................................ 30
7. Advanced Operation ............................................ 31
7.1 Dehumidification .......................................... 31
7.2 Warm Air Discharge .................................... 31
7.3 Lockouts ...................................................... 31
7.4 Control Response Rate ............................... 31
7.5 Aux Contacts .............................................. 31
7.6 Stand Alone Operation ................................ 31
8. Diagnostic Tools ................................................... 32
8.1 Test Modes. ................................................. 32
8.2 Data Logging ............................................... 32
8.3 Diagnostics .................................................. 32
8.4 History ......................................................... 32
9. Notices .................................................................. 37
9.1 FCC Notice .................................................. 37
9.2 ICC Notice ................................................... 37
9.3 Warranty ...................................................... 38
Contents
