Product specifications

ManualsBrandsAmerican Standard ManualsHousehold AppliancesACONT900AC43UA

INSTALLER’S GUIDE

69-2080-05

Pub No. 11-HD04D1-2

ACONT900AC43UA

COMFORT CONTROL -

4 HEAT (GAS, OIL*, OR ELECTRIC)/3 COOL/HEAT PUMP

COMMUNICATING PROGRAMMABLE

3 WIRE HOOKUP

ALL phases of this installation must comply with NATIONAL, STATE, AND LOCAL CODES

NOTE: If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the

trash. Dispose of properly.

NOTE: Contact your local waste management authority for instructions regarding recycling and the proper disposal of

an old control.

INTRODUCTION

The ACONT900AC43UA is a communicating programmable Comfort Control that supports single-stage or multi-stage

heat/cool and heat pump applications. It is a wall mounted, low voltage (24VAC) communicating Comfort Control with

backlit LCD and a touch screen display. Room temperature is maintained by controlling the operation of heating,

cooling, heat pump, and dual fuel systems via digital, 2-way communications. The Comfort Control will communicate

with and identify all AccuLink

components in the system. It is easily manually configured via the user friendly Installer

Setup menu. The Comfort Control features include separate heating and cooling setpoints, selectable auto or manual

changeover, menu driven 7-day programming, adjustable filter reminders, and outdoor temperature sensing. Setup

selections and diagnostics are stored indefinitely in the Comfort Control’s nonvolatile memory eliminating the need for

battery backup.

* See System and Fan Keys section for specific information.

Accessories

Optional

BAYSEN01ATEMPA - Outdoor Sensor - For use with communicating outdoor equipment

BAYTAM00AC00UA - Telephone Access Module (TAM)

Table 1. ACONT900AC43UA Comfort Control

Power Method Changeover

System Selection

and Fan Keys* Fan Selection Comments

24 Vac common wire Automatic or Manual

selectable

Heat-Off-Cool-Auto

Emergency Heat

On-Auto-Circ System and Fan selection

vary, based on system type

Humidity sensor to control

dehumidification and

humidification

Summary of content (24 pages)

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ACONT900AC43UA COMFORT CONTROL 4 HEAT (GAS, OIL*, OR ELECTRIC)/3 COOL/HEAT PUMP COMMUNICATING PROGRAMMABLE 3 WIRE HOOKUP INSTALLER’S GUIDE ALL phases of this installation must comply with NATIONAL, STATE, AND LOCAL CODES NOTE: If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Dispose of properly. NOTE: Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old control.
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ACONT900AC43UA PRODUCT SPECIFICATIONS Power Source: 18-30 VAC, Class II, 50/60Hz Storage Range: -30°F-150°F (-34.4°C-65.6°C), 5%-90% RH non-condensing Operating Temperature Range: 0°F-120°F (-17.8°C-37.2°C), 5%-90% RH non-condensing System Mode: Heat, Cool, Auto, Emergency Heat, and Off Fan Mode: On, Auto, and Circ Cooling Setpoint Temperature Range: 60°F-99°F (15.5°C-37.0°C), 1°F (0.5°C) resolution Heating Setpoint Temperature Range: 50°F-90°F (10°C-32.0°C), 1°F (0.
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ACONT900AC43UA INSTALLATION Sub-base Installation When Installing this Product... The Comfort Control can be mounted horizontally on the wall or on a 2 in. by 4 in. wiring box. Position sub-base horizontally on the wall or on a 2 in. by 4 in. wiring box. 1. 2. 3. 4. Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.
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ACONT900AC43UA COM. COMFORT CONTROL COM. INDOOR UNIT COM. OUTDOOR UNIT D D 24VAC HOT R R 24VAC Common B B B Y1 Y1 Y2 Y2 O O BK X2 DATA D W1 W2 LOW VOLTAGE WIRING TO BE NO. 18 AWG MINIMUM CONDUCTOR. W3 G Fig. 2. Field Wiring Diagram, Communicating Indoor Unit - Communicating Outdoor Unit COM. COMFORT CONTROL DATA COM. INDOOR UNIT SINGLE STAGE AIR CONDITIONER D D 24VAC HOT R R 24VAC Common B B B Y1 Y Y2 O BK W1 W2 LOW VOLTAGE WIRING TO BE NO. 18 AWG MINIMUM CONDUCTOR.
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ACONT900AC43UA 2. 3. 4. Securely tighten each terminal screw. Push excess wire back in the hole. Plug the hole in the wall with nonflammable insulation to help prevent drafts from adversely affecting Comfort Control operation. Table 2. Terminal Designations Terminal Designations Function D Data R Power - 24 Vac (hot) B Power - 24 Vac (Common) Mounting Comfort Control on Sub-base NOTE: To remove the Comfort Control from the wall, pull straight out. 1. 2. 3.
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ACONT900AC43UA 1. Communicating Indoor Unit Communicating Outdoor Unit NOTE: If the system is not powered, the Real Time Clock battery life is approximately 20 weeks. For a fully communicating system, the communicating Comfort Control will automatically configure the indoor and outdoor equipment configuration and cycle rates for each stage. See Figure 2. The Comfort Control is designed to automatically keep the current time and day in memory for up to ten years under normal use once calendar is set.
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ACONT900AC43UA INSTALLER SETUP (ISU) The Comfort Control works with many different system types. The installer can use the Installer Setup menu to change factory settings to customize installations. See Table 4. WED THU Inside Entering Installer Setup FRI SUN Following Schedule OFF COOL Be sure the Comfort Control is powered. SAT AT Set To SYSTEM EM HEAT Follow these steps to enter the Installer Setup: 1.
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ACONT900AC43UA Table 4. Installer Setup Menu Selection Installer Setup Number (ISU) Factory Setting Choices Option Description Comments Schedule Options 0160 4 0, 4 0 - Non-programmable 4 - 7 Day programmable Restore Energy Star Schedule 0165 0 0, 1 0 - No No ISU or USU settings 1 - Resets the schedule to affected.
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ACONT900AC43UA Table 4. Installer Setup Menu Selection Installer Setup Number (ISU) Factory Setting Choices Option Description Comments Backup Heat source (Aux heat) 0200 E E, 0, 1 E - Auto-Discover 0 - Electric 1 - Fossil HP only 1st Stage Compressor Cycles Per Hour (CPH) 0220 E E, 2-6 E - Auto-Discover 2 - 6 is available; (3 is recommended) Default value is 3 CPH if nothing is discovered.
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ACONT900AC43UA Table 4. Installer Setup Menu Selection Installer Setup Number (ISU) Factory Setting Choices Option Description Comments Dual Fuel Heat Pump 0345 Control 1 0, 1, 2 0 - Compressor lockout If compressor is “Failing to only maintain heat”, revert to aux 1 - Heat Pump Compressor heater above balance point. lockout and failed to maintain heat protection 2 - Heat Pump Compressor lockout and Auxiliary Heat lockout and Failed to maintain heat protection in between.
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ACONT900AC43UA Table 4. Installer Setup Menu Selection Installer Setup Number (ISU) Factory Setting Choices Option Description Comments 2nd Stage Heater Defrost Balance Point 0362 40 0, 5 - 55 0 - Disabled 5 - 5°F (-15.0°C) 10 - 10°F (-12.0°C) 15 - 15°F (-9.5°C) 20 - 20°F (-6.5°C) 25 - 25°F (-4.0°C) 30 - 30°F (-1.0°C) 35 - 35°F (1.5°C) 40 - 40°F (4.5°C) 45 - 45°F (7.0°C) 50 - 50°F (10.0°C) 55 - 55°F (13.0°C) Only shown if outdoor temperature is available.
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ACONT900AC43UA Table 4. Installer Setup Menu Selection Installer Setup Number (ISU) Choices Option Description Comments 100 80 - 100 80 - 80% Airflow 85 - 85% Airflow 90 - 90% Airflow 95 - 95% Airflow 100 - 100% Airflow Only shown for variable speed indoor units. See Advanced Features section for more information American Standard 0388 Heating & Air Conditioning Proprietary Humidity Control 1 0, 1 0 - Disabled 1 - Enabled Not shown if ISU0380 is set to 0.
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ACONT900AC43UA Table 4.
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ACONT900AC43UA Table 4. Installer Setup Menu Selection Installer Setup Number (ISU) Factory Setting Choices Option Description Comments Minimum 0630 Compressor On Time 3 0 - 15 Minimum number of minutes compressor is on. Clock Format 0640 12 12, 24 12 - 12-hour clock format 24 - 24-hour clock format Extended Fan On Time Heat 0650 0 0, 30, 60, Fan operation is extended Only shown for nonvariable 90 or 120 0, 30, 60, 90 or 120 speed indoor units. seconds after call for heat ends.
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ACONT900AC43UA Table 4. Installer Setup Menu Selection Installer Setup Number (ISU) Factory Setting Choices Option Description 2 1, 2, 3 Temperature Display 0700 Offset 0 -3, -2, -1, -3°F (-1.5°C) 0, 1, 2, 3 -2°F (-1.0°C) -1°F (-0.5°C) 0°F (0.0°C) 1°F (0.5°C) 2°F (1.0°C) 3°F (1.
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ACONT900AC43UA LED Indication Alert Code Numbers An LED indicator is located in the upper right corner of the Comfort Control. It is only visible when lighted: The Comfort Control can receive Alert codes from any communicating equipment via the AccuLinkTM bus. The Comfort Control will illuminate the Red “Service” LED and toggle between the main screen and a screen showing the Alert code number.
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ACONT900AC43UA Table 6. Installer System Tests Selection Installer Setup Number Factory Setting Choices Option Comments Description Installer Test Heat Test 3 0 0, 1, 2, 3, 0 - Heat is off 4 1 - Heat stage 1 2 - Heat stage 1, 2 3 - Heat stage 1, 2, 3 4 - Heat stage 1, 2, 3, 4 Not shown if ISU 0176 is set to 0. If Discharge Air Temperature Sensor is available, Press the More key to show the Discharge Air Temperature Air Value.
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ACONT900AC43UA the filter timer value can be viewed at any time by simply pressing the More key until the filter timer is displayed on the screen. TUE FAN NOTE: Both the filter timers are auto discoverable ISU settings. If no AccuLinkTM communicating filtering device has been discovered, the auto discovered value will default to 0. To enable one or both timers, change ISU 0500 and/or ISU 0501 to a value other than 0.
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ACONT900AC43UA The Frost Setting can be accessed by pressing the More key until the Frost Setting is displayed on the screen. It has a value range of 0 to 10, with 0 representing glass with poor insulation and 10 representing glass with perfect insulation. If the factory setting (5), results in too much condensation or frost on the windows, lower the setting. When the air seems too dry, raise the setting.
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ACONT900AC43UA Defrost Heater Balance Point Control When an outdoor temperature sensor has been discovered/ enabled, a separate outdoor temperature turn-on threshold can be set for each installed heater stage during defrost in Installer Setup Numbers 0361 0363. If the balance point for a particular heater stage is disabled, that heater stage will be used during every defrost cycle independent of the outdoor temperature.
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ACONT900AC43UA Table 7. Troubleshooting Information Symptom Possible Cause Action Red service LED is illuminated and the display alternates between Home screen and Alert Code screen. Alert Code present Refer to the Alert Code Addendum (form 18-HD32D2-1/69-2009). Display will not come on. 1. Blown fuse or tripped circuit breaker. 2. Indoor unit power switch OFF. 3. Indoor unit blower compartment door or panel loose or not properly installed. 4. Wire broken/shorted; or R and D or B and D are reversed.
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ACONT900AC43UA Table 7. Troubleshooting Information Symptom Fan runs all of the time. Possible Cause Action 1. Fan mode is set to ON continuous. 2. Fan scheduled to run continuously. 3. Indoor equipment may need service. 1. Set fan mode to AUTO or CIRC. 2. Reprogram fan schedule, if desired. 3. Check Indoor equipment. Fan is set to “On” but not running. 1. American Standard Heating & Verify that the Dehumidification setpoint Air Conditioning Proprietary is below the actual indoor humidity.
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ACONT900AC43UA Pub. No.