AMANA PHWT-A150H THERMOSTAT
1) DESCRIPTION AND COMPATIBILITY
The Amana PHWT-A150H is a non-programmable electronic thermostat, which can be used with the following heating/cooling applications:
•Cooling/ Conventional PTAC Units (PTC) with or without Electric Heat
•Heat Pump PTAC Units (PTH or HEH) with or without Electric Heat
2) SPECIFICATIONS
•Input Voltage: 19 to 30 VAC
•Output Rating: Max. 1.5A per terminal (3A total)
•Temperature Control: 45°F to 90°F (7°C to 32°C)
•Temperature Accuracy: ± 1°F (± 0.5°C)
•Wire Terminals:
C |
24 VAC Common |
GL |
Fan LOW Speed |
GH |
Fan HIGH Speed |
W2 |
2nd Stage or Auxiliary Heating Signal |
W1 |
1st Stage Heating Signal |
Y |
Cooling Signal |
R |
24 VAC Hot |
B/O |
Reversing Valve |
3) SAFETY INFORMATION
•This thermostat is for LOW voltage applications only.
•Turn OFF electricity to all heating and cooling components.
•All wiring must conform to applicable local and national building and electrical codes and ordinances.
4) TO REMOVE EXISTING THERMOSTAT
1.Write down the letters printed near each wire terminal that is used, and the color of each wire it is connected to; self-adhesive wire labels are also enclosed.
2.Carefully remove wires from existing thermostat and bend so they cannot fall back into wall or touch each other.
3.Remove existing thermostat base from the wall.
5) TO INSTALL NEW THERMOSTAT
1.Mount the thermostat on an inside wall about five feet above the floor in an area that has good circulation, but is not directly affected by a vent or duct.
2.If painting or construction is still ongoing, cover the thermostat completely or wait until work is complete before mounting thermostat.
3.If new mounting holes are needed, mark the placement of the new mounting holes through the thermostat base. Using a 3/16” drill bit, drill the holes you have marked and insert the supplied wall anchors.
4.Feed the wires through the wire opening in the base and use supplied screws to mount base to the wall.
5.Using Section 7) WIRING DIAGRAMS, wire each terminal on the new thermostat base. Ensure that the bare end is fully seated into the connector, then tighten securely. Pull gently on wires to ensure they are secure.
6.Place thermostat front back onto the base.
7.Restore power back to heating and cooling components and thermostat.
8.See Section 8) INSTALLER SETTINGS MENU, to adjust the required settings needed for each system type.
53611-1
6) FRONT PANEL CONTROLS
THERMOSTAT SYSTEM MODE SWITCH POSITIONS:
HEAT position
OFF position
COOL position
HEAT = thermostat permits heating operation
OFF = thermostat stops all heating or cooling functions COOL = thermostat permits cooling operation
THERMOSTAT FAN SWITCH POSITIONS:
AUTO position
LOW position
HIGH position
AUTO position = fan operates in low speed mode as needed during a call for heating or cooling activation only.
LOW position = fan operates continuously in LOW speed, with the heating or cooling components cycling on and off in the background as needed.
HIGH position = fan operates continuously in HIGH speed, with the heating or cooling components cycling on and off in the background as needed.
THERMOSTAT BUTTONS:
UP button
DOWN button
UP / DOWN = used for raising or lowering the target set temperature and selecting user options and settings in the display screen.
The temperature that is shown at all times in normal operation is the Target Set Temperature.
To view current ambient room temperature while in Heat or Cool mode, perform a single press of BOTH the Up and Down buttons at the same time.
Note: to adjust the target set temperature, first ensure that the thermostat is in either Heat or Cool mode, and press either the up or down buttons until the desired target temperature is reached. Presses to the Up or Down buttons will have no effect when the thermostat is in Off mode.
SETTING A KEYPAD / FRONT PANEL LOCKOUT:
•While in either HEAT or COOL mode, a keypad lockout can be introduced which will prevent any temperature adjustment from being made by the user. Even while locked, any button press will illuminate the display backlight.
•To activate (and deactivate) the keypad lockout, press and hold BOTH the Up and Down buttons for at least 5 seconds. When the keypad is locked, a padlock will appear in the lower left corner of the display.
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