Mechanical Thermostat, Plastic, 3 in. D

Description

Designed for PTAC and wall-mounted HVAC systems, the Amana PHWT-A150H offers reliable temperature control with intuitive operation and robust compatibility. Whether your system supports conventional heating / cooling or heat pump configurations, this thermostat handles both with ease.

Key Specifications & Features

• Model / Type: PHWT-A150H (non-programmable wall thermostat)
• Dimensions: 5-5/16″ H × 5-5/16″ W × 3″ D
• Material / Housing: Plastic enclosure
• Voltage / Power Input: 19–30 VAC (for low-voltage HVAC control systems)
• Output / Load Rating: Maximum 1.5 A per terminal; 3 A total load
• Temperature Range / Control: 45 °F to 90 °F (7 °C to 32 °C), with ±1 °F accuracy
• System Compatibility / Modes:
    • 2-stage heat / 1-stage cool (for heat pump systems)
    • 1-stage heat / 1-stage cool (for conventional / electric heat systems)
• Fan Control Options: Slide switches for Auto, Low, and High speed settings
• Display / Interface: Large backlit display with up / down soft-touch controls
• Additional Features:
    • Field-adjustable calibration
    • Manual changeover between heating and cooling
    • Keypad lockout capability

Benefits & Applications

• Flexible for Multiple System Types
  Handles both heat pump and conventional systems via selectable configuration, making it ideal for mixed HVAC setups in hotels, apartments, or commercial spaces.
• User-Friendly Interface
  The large backlit display and simple controls make it easy for building occupants to adjust setpoints and modes without confusion.
• Reliable & Accurate Control
  Precise ±1 °F accuracy ensures stable indoor comfort and efficient cycling, while robust output ratings support typical HVAC loads.
• Compact & Standard Form Factor
  The compact 5-5/16″ × 5-5/16″ footprint allows for straightforward installation and replacement of many standard wall thermostats.
• Commercial / Hospitality Ready
  Commonly used with PTAC units in hotel rooms, apartments, or retrofit installations where simple, dependable control is needed.

Installation & Usage Tips

1. Verify Wiring Compatibility
   Ensure your HVAC system’s control wiring matches the terminal layout (R, C, W1, W2, Y, fan, reversing valve terminals) and that your system voltage is within 19–30 VAC.
2. Mounting Location
   Mount on an interior wall about 4–5 ft above the floor, away from direct sunlight, drafts, or heating sources to get accurate ambient readings.
3. Set System Type Correctly
   Use the thermostat’s settings to specify whether you're running a heat pump (2H/1C) or a conventional system mode. Incorrect selection may lead to improper operation.
4. Adjust Calibration if Needed
   If the thermostat reads slightly off compared to a reference, use the built-in calibration adjustment to fine-tune.
5. Test After Installation
   Cycle both heating and cooling modes to confirm the system responds properly. Set minimum cooling and maximum heating setpoints to avoid short cycling.