American Standard / Trane BAY24VRPAC52DBA - Conventional 24 Volt HVAC System Interface Relay Panel for American Standard AccuLink Platinum ZV or Trane ComfortLink XL Control. 1 Year Warranty 5 Heat (Gas , Oil ,Electric) / 2 Cool / Heat Pump / Dual Fuel LED Stage Indicators * Automatically communicates and coordinates with your other system components via the AccuLink Communicating System* American Standard / Trane Component