Trane BAYSTAT152A Thermostat Operation Manual

The Trane BAYSTAT152A is a touch-screen programmable thermostat designed for conventional rooftop units, air conditioners, and heat pumps. It provides automatic HVAC control with an LCD touch screen displaying temperature, setpoints, modes, time, and occupancy. Supports programmable/non-programmable modes, scheduling, temporary overrides, and remote sensors for temperature/humidity. Below are the key specifications and operation instructions.

Key Specifications

• Type: Touch-screen programmable thermostat for conventional and heat pump systems
• Compatibility:
  • Conventional: 1H/1C, 2H/1C, 2H/2C; Heat Pump: 1H/1C, 2H/1C, 2H/2C, 3H/2C with aux heat
  • Remote temp/humidity sensors, dehumidify relay, economizer/TOD, fan control
  • Single/dual transformer systems; max wire resistance ≤2.5 ohms
• Power:
  • 24 Vac (18-32 Vac), 50-60 Hz
• Temperature Range: Operating: 32°F to 122°F (0°C to 50°C); Storage: –4°F to 158°F
• Dimensions: Compact wall-mount (see manual Figure for details)
• Features:
  • LCD touch screen; 7-day scheduling (2/4 periods); TOV overrides
  • System modes: Heat/Cool/Auto/Off/Em Heat; Fan: Auto/On
  • CPH control (1-10 heat, 1-5 cool); fan extension; lockouts
  • Filter reminder; humidity control (40-60% RH)
• Compliance: Installation by qualified personnel; hazardous voltage precautions

Operation Instructions

Initial Setup

1. Power On: Apply HVAC power; thermostat runs power-up test (checks voltage/sensors; displays errors if any).
2. Set Time/Date: Touch clock icon; adjust hour/minute/day/month/year with arrows; save.
3. System Mode: Touch mode icon; select Heat/Cool/Auto/Off/Em Heat.
4. Dehumidify: If enabled, touch humidity icon to set 40-60% RH.

Home Screen Navigation

1. Display: Current temp (local/remote/outdoor), setpoints, time/day, mode, fan, occupancy, humidity, alerts (e.g., filter).
2. Controls: Touch icons for mode/fan/schedule; arrows for setpoints.
3. Icons: System mode, fan, time, occupancy, temp arrows, humidity, outdoor temp.

Scheduling and Presets

1. Access: Touch schedule icon; select day/group (All/Mo-Fr/Sa-Su).
2. Periods: 2 or 4 per day; set start times (e.g., 6AM/8AM/6PM/10PM), setpoints (heat 70°F/62°F, cool 78°F/85°F), fan/occupancy.
3. Defaults: ENERGY STAR compliant (e.g., mornings/evenings 70°F heat/78°F cool).
4. Save: Changes auto-save; cancel discards.

Settings Screen

1. Access: Installer menu (hold center 5s); set units (Option 0100), changeover (0110), CPH (0162-0172).
2. Filter Reset: Hold arrows 3s.
3. Lockout: Option 0290 (code required).
4. Offset: ±3°F display (0220).

Advanced Features

1. TOV: Touch fan for quick (up to 4 hrs); or user custom time/setpoint/fan.
2. Remote Sensors: Temp (0210: local/remote/outdoor), humidity (0200).
3. Non-Programmable: Option 0140=1 for manual only.
4. Economizer/TOD: Option 0150; fan extension (90s cool/40s heat).

Troubleshooting

• Error E1: Low voltage (<16.6V); check power.
  
• E2: High voltage (>34V); check transformer.
  
• E3/E7: Sensor short/open; cycle power/service.
  
• E4/E6: Memory errors; replace unit.
  
• Out-of-Range: Blinking "--F"/"--C"; adjust location.

Installation Instructions

Warning: Qualified personnel only; disconnect power, lockout/tagout to avoid hazards.

Pre-Installation

• Mount 4-5 ft above floor on interior wall; avoid sun/drafts/corrosives.
  
• Tools: Screwdriver, stripper, level.
  
• Wire: 18-22 AWG; max length per Table (e.g., 150 ft 18 AWG).

Wiring Diagrams

For various systems (11 options):

Terminal	Connection
R/Rc/Rh	24V Power
W1/W2	Heat Stages
Y1/Y2	Compressor Stages
O/B	Changeover Valve
G	Fan
C	Common
S1/S2	Remote Temp Sensor
Hp/Hs	Remote Humidity Sensor

Note: Jumper Rc/Rh for single transformer; see manual Figures 4-14 for full diagrams.

Configuration Options

1. Enter menu post-power-up (hold center 5s).
   
2. Set system (0120: HP/Conv), stages (0130), programmable (0140).
   
3. Temp sensor (0210), CPH rates, lockouts (0180/0181).
   
4. Test stages (0199); reset if needed (0300).

Calculation Tool

Estimate monthly savings from scheduling setback (assumes 1% savings per °F, based on CPH duty cycle; 30 days/month).