Trane TAYSTAT 570 Thermostat Operation Manual

The Trane TAYSTAT 570 is an electronic heat-pump thermostat designed for 24 VAC heat pump systems, including single- and multi-stage configurations with auxiliary heat. It features a simple LCD display for room temperature and setpoints, system modes (Em. Ht., Heat, Off, Auto, Cool), and fan options (Auto, On) for reliable control. Automatic changeover and emergency heat capabilities ensure comfort, with warnings for equipment protection. Below are the key specifications and operation instructions.

Key Specifications

• Type: Electronic heat-pump thermostat for 24 VAC systems
• Compatibility:
  • Single- and multi-stage heat pumps with auxiliary/emergency heat
  • Automatic changeover with 3°F deadband
  • Fan control (Auto/On)
• Power:
  • 24 VAC between B (common) and R terminals
• Temperature Range: 50°F to 99°F (10°C to 37°C); do not operate cooling below 50°F to avoid equipment damage
• Display:
  • LCD showing room temperature, setpoints, mode status
• Dimensions: Compact wall-mount design
• Features:
  • System modes: Em. Ht., Heat, Off, Auto, Cool
  • Fan modes: Auto, On
  • Emergency heat bypass
  • Installer setup for compressor off time, changeover
• Compliance: UL listed; 1-year warranty (extendable to 5 years with registration)

Operation Instructions

Initial Setup

1. Power On: After installation, the display shows room temperature; all segments briefly illuminate.
2. Set System Mode: Use SYSTEM switch: Em. Ht. (emergency), Heat, Off, Auto, Cool.
3. Set Fan Mode: Use FAN switch: Auto (with system) or On (continuous).
4. Adjust Temperature: Press Increase/Decrease keys; setpoint displays with "Set" indicator.

Home Screen Navigation

1. Display: Room temperature (default); press setpoint key to toggle "Set" view; indicator points to Room/Set.
2. Controls: SYSTEM/FAN switches; Increase/Decrease for adjustments; Information (i) key for thermostat info (revision, code).
3. Indicators: Dynamic labels; caution for cooling below 50°F.

Operating Modes

1. Emergency Heat (Em. Ht.): Bypasses compressor; activates auxiliary heat.
2. Heat: Engages compressor/auxiliary; raise setpoint.
3. Cool: Engages compressor; lower setpoint (avoid below 50°F).
4. Auto: Switches modes with 3°F deadband.
5. Off: Inactive.
6. Fan: Auto or On.

Settings Screen

1. Access Installer Setup: Hold Increase 5s; scrolls options (01-08).
2. Key Options: 01: Scale (°F/°C); 02/03: Extended fan (heating/cooling On/Off); 04: Changeover (Auto/Manual); 05: Compressor off time (3/5/10/15 min); 06: Temp adjustment (±3°F); 07: Clock accuracy (±15 min/year); 08: Aux heat type (0=None, 1=Gas, 2=Electric).
3. Exit: Press i or timeout (5 min).

Advanced Features

1. System Test: Hold Increase 10s; tests stages (fan, heat 1-3, Em. Ht., cool 1-2).
2. Outdoor Sensor: Optional for lockout.
3. Aux Heat: Up to 3 stages; type configurable.
4. Extended Fan: Post-cycle run (On/Off).

Troubleshooting

• Display Off: Check B-R 24 Vac; common wire.
  
• No Heat: B-R/W-AUX 24 Vac; aux relay.
  
• No Cool: B-R/Y 24 Vac; sensor if used; off time.
  
• Wrong Mode: Check switch; changeover setup.
  
• No Fan: B-R/G 24 Vac; relay.
  
• Sensor Fault: "--" display; wiring.

Installation Instructions

Warning: Technician only. Disconnect power.

Pre-Installation

• 5 ft high, circulation; avoid drafts/sun.
• Tools: Screwdriver, level, drill.

Wiring Diagrams

Two-compressor heat pump with aux heat:

Terminal	Connection
R	24V Hot
B	Common
Y1	Compressor 1
Y2	Compressor 2
O	Changeover (Cool)
W/AUX	Aux Heat 1
E	Emergency Heat
G	Fan
AUX2	Aux Heat 2
AUX3	Aux Heat 3
S1/S2	Outdoor Sensor

Note: Single compressor: Down-select Y2.

Configuration Options

1. Hold Increase 5s for setup.
   
2. Set scale (01), fan (02/03), changeover (04), off time (05), adjustment (06), clock (07), aux (08).
   
3. Test: Hold Increase 10s.
   
4. Exit: i or timeout.

Calculation Tool

Estimate monthly savings from aux heat lockout (0.4 kWh/hr avoided; 5°F threshold; 30 days/month).