American Standard HVAC TWE024C14 Manual

The American Standard TWE024C14 is a high-efficiency, two-stage heat pump system designed for residential use. It features advanced humidity control, quiet operation, compatibility with variable-speed air handlers, and meets ENERGY STAR® requirements. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Thermostat 7. Operation Modes 8. Maintenance Schedule 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Outdoor heat pump unit, indoor air handler/coil, thermostat, refrigerant lines, electrical connections.

Feature	Description
Two-Stage Operation	Provides efficient heating and cooling with two capacity levels
High SEER Rating	Up to 18 SEER for energy savings
Quiet Operation	Sound-dampening compressor and fan design
Humidity Control	Enhanced dehumidification in cooling mode
Compatible Thermostats	Works with American Standard communicating and conventional thermostats
Durable Construction	Weather-resistant cabinet with corrosion protection
Refrigerant	Uses R-410A environmentally friendly refrigerant
Service Ports	Easy-access ports for pressure checking and charging
Safety Switches	High and low-pressure switches, compressor overload protection
Diagnostic LED	Flashing LED for troubleshooting codes

Installation

Unpack and inspect contents. Place outdoor unit on level pad.

Position outdoor unit: Install on concrete pad or approved mounting system with proper clearances.
Connect refrigerant lines: Braze copper lines between indoor and outdoor units following EPA guidelines.
Connect electrical: Run high-voltage power to disconnect box; connect low-voltage thermostat wires.
Connect condensate drain: Ensure proper drainage from indoor unit to prevent water damage.
Vacuum and charge system: Evacuate to 500 microns; charge with correct amount of R-410A.

WARNING! Installation must be performed by qualified HVAC technician. Refrigerant handling requires EPA certification.

First-Time Setup

Power on system; configure thermostat settings.

System power-up: Turn on power at disconnect and indoor unit; wait for system initialization.
Thermostat configuration: Set system type to heat pump, configure staging, fan operation.
Test operation: Run system in cooling and heating modes to verify proper function.
Check airflow: Verify adequate airflow at all supply registers.
Monitor pressures: Confirm operating pressures are within manufacturer specifications.

CAUTION! Do not operate without proper refrigerant charge. Ensure electrical connections are tight.

Specifications

Model: TWE024C14
Type: Split-system heat pump
Cooling Capacity: 24,000 BTU/h (2 tons)
Heating Capacity: 24,000 BTU/h at 47°F
SEER Rating: Up to 18 SEER
HSPF Rating: Up to 9.5 HSPF
Refrigerant: R-410A
Electrical: 208/230V, 1 phase, 60 Hz
Operating Range: Cooling: 55°F to 115°F outdoor; Heating: -5°F to 65°F outdoor
Sound Level: As low as 72 dB outdoors
Dimensions (Outdoor Unit): 31" H x 31" W x 31" D (approx.)
Warranty: 10-year limited warranty on compressor, 5-year on parts

Controls and Settings

Access system settings via compatible thermostat. Outdoor unit has diagnostic LED.

Thermostat Settings: SYSTEM (Off, Heat, Cool, Auto, Emer Heat), FAN (Auto, On), TEMPERATURE setpoints, STAGING configuration, HUMIDITY control, SCHEDULE programming.

Advanced Settings: Compressor lockout temperatures, fan delay, filter reminder, diagnostic mode. Outdoor Unit: Service valve positions, diagnostic LED codes (1 flash = normal, 2 flashes = low pressure, 3 flashes = high pressure, etc.).

Connecting Thermostat

Use 18-gauge thermostat wire with at least 5 conductors (R, C, Y1, Y2, O/B, G, W1, W2).

Turn off power to indoor and outdoor units at disconnect boxes.
Remove thermostat cover and connect wires to appropriate terminals.
Match colors: R (24V power), C (common), Y1 (cool stage 1), Y2 (cool stage 2), O/B (reversing valve), G (fan), W1 (heat stage 1), W2 (heat stage 2).
Configure thermostat for heat pump operation with auxiliary/emergency heat.
Restore power and test all functions.

Tip: Label wires before disconnecting old thermostat. Use wire nuts for secure connections.

Operation Modes

System operates in multiple modes for comfort and efficiency.

Cooling Mode: Compressor runs in stage 1 or 2 based on cooling demand.
Heating Mode: Heat pump extracts heat from outdoor air; reverses refrigerant flow.
Emergency Heat: Uses backup electric heat strips when heat pump cannot meet demand.
Auto Mode: Automatically switches between heating and cooling based on room temperature.
Fan Only: Circulates air without heating or cooling.
Dehumidify: Enhances moisture removal in cooling mode.

WARNING! Do not switch between heating and cooling modes rapidly. Allow 5-minute delay between mode changes.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Frequency	Task
Monthly	Check/change air filter
Seasonally	Clean outdoor coil, clear debris around unit
Annually	Professional inspection: check refrigerant charge, electrical connections, drain lines, coil cleanliness
Every 3-5 years	Professional deep cleaning of indoor coil and blower assembly

Care & Cleaning

Turn off power before cleaning. Keep outdoor unit clear of debris.

Outdoor unit: Remove leaves, grass clippings; clean coil with gentle water spray (not pressure washer).
Indoor unit: Clean evaporator coil accessibly; ensure drain pan and line are clear.
Air filter: Replace disposable filters or clean permanent filters monthly during peak use.
Condensate drain: Pour 1 cup vinegar through drain line annually to prevent algae growth.

CAUTION! Do not bend coil fins. Keep electrical components dry during cleaning.

Regulatory Information

UL listed; meets ASHRAE standards. EPA Section 608: Contains refrigerant; service must be performed by certified technician. ENERGY STAR® qualified. California Proposition 65 warning: This product may contain chemicals known to cause cancer or reproductive harm. For support, visit www.americanstandard.com or contact 1-800-628-4516.

Troubleshooting

Symptom	Possible Cause	Corrective Action
System not turning on	Power loss, tripped breaker, thermostat issue	Check disconnect switches and circuit breakers; verify thermostat settings and batteries.
Insufficient cooling/heating	Dirty filter, low refrigerant, blocked airflow	Change filter; clear obstructions; call technician for refrigerant check.
Outdoor unit not running	Lockout mode, faulty capacitor, sensor issue	Check diagnostic LED; reset power; call technician.
Ice on outdoor coil	Low refrigerant, dirty coil, low airflow	Turn system off to defrost; clean coil; call technician.
Water leakage indoors	Clogged drain line, disconnected drain	Clear drain line; ensure proper slope; check drain pan.
Unusual noises	Loose parts, failing motor, debris in fan	Turn off system; inspect for obstructions; call technician.

Reset: Turn off power at disconnect for 5 minutes, then restore.

Service: 1-800-628-4516; www.americanstandard.com