2.When you have the black ribbon out, simply push the battery compartment back in while lining up the arrows.
OPERATING BASICS
3.On the back of the PSP300, there is an External Temperature Sensor that looks like an antenna. Pull this sensor out of its clip and bend the wire so that it point straight up. This is required for accurate temperature control.
4.On the upper right
side of the unit, there is an On/Off switch. Place this switch in the OFF position for right now.
MOUNTING
EXTERNAL TEMPERATURE 
SENSOR
ON/OFF SWITCH
RUN MODE
For the thermostat to function, the dial on the face of the thermostat must be turned to the RUN position. If you forget to do this, it will not work and the door will not close all the way.
UP/DOWN CHANGE KEYS
●These are the two upper keys, just right of the unit’s display. They are used to adjust set temperatures, and make other setting changes.
●Pressing these keys once will adjust a setting one step in the associated direction.
●If there are many choices for a value, usually that set- ting will advance while holding one of these keys. Some settings though, must be changed one press at a time.
SET DAY AND TIME
To set the correct time after the unit has lost power or after reset:
W A R N I N G :
●If any plugs do not fit into the receptacle that you are trying to plug into, Stop, the PSP300 is not designed for this application.
●If the cord you are plugging into the PSP300 only has 2 prongs, STOP, not having
a ground wire is unsafe. Your
Window Air Conditioner or Spacer Heater must have a plug with 3 prongs on it.
5.Plug the PSP300 straight into a 110 Volt electrical out- let on the wall nearest your Air Conditioning Unit or Space Heater.
6.Plug in the electrical cord from your Window Air Conditioner or Space Heater directly into the front of the PSP300.
COMPLETING YOUR INSTALLATION
7.Configure your thermostat at this time. Refer to
OPERATING INSTRUCTIONS.
8.Turn the ON/OFF switch on the upper right side to the ON position.
9.Turn on your Air Conditioner or Space Heater and turn the thermostat all the way up. (This will allow the PSP300 to control the room temperature and maintain a specific temperature)
10.Verify that the Window Air Conditioner or Space Heater and its fan are operating properly. When set to a high temperature, the heating system should provide warm air after a short time. Likewise, a cooling system should provide cool air after a short time. Usually sound can be heard while they are running. The rush of mov- ing air should be heard within a short time after either has been started.
11.Your installation is now complete.
1. Open the door on the front of the thermostat by lifting up the bottom of the door.
2.Rotate the dial to SET DAY AND TIME. The abbreviation for the day of week will flash.
WE
3.Use the UP key to advance to the current day.
4.Press NEXT to adjust the time. Time will flash.
5.Use the UP/DOWN keys to set the time.
6.Pressing NEXT again will toggle from Set Time to Set Day, or vice versa.
7.Return the dial to its RUN position.
TEMPERATURE CONTROL MODES
When a unit has first been powered up with the dial in the RUN position, your thermostat will begin to control your heating and/or air conditioning system according to it's default ENERGY STAR® approved program. There is a
