Friedrich 920-087-04 (3-05) manual Friedrich Digital Control Features, DigitalTemperature

920-087-04 (3-05)

Friedrich Digital Control Features

The new Friedrich digital PTAC has state of the art features to improve guest comfort, indoor air quality and conserve energy. Through the use of specifically designed control software for the PTAC industry Friedrich has accomplished what other Manufactur- er’s have only attempted – a quiet, dependable, affordable and easy to use PTAC.

Below is a list of standard features on every Friedrich PTAC and their benefit to the owner.

DigitalTemperature	By digitally monitoring desired room temperature the room is controlled more precisely than conventional systems. The large, easy
Readout	to read LED display can show either set-point or actual room temperature as selected by owner.
One-TouchOperation	When the unit is powered off the unit can be returned directly to heating or cooling mode by pressing the ‘Heat’ or ‘Cool’ buttons
	without the confusing power up sequence of some controls. One-touch control takes guesswork out of unit control delivering a more
	enjoyable experience and eliminating front-desk calls.
IndividualModeand	By having separate control buttons and indicators for both fan and mode settings the Friedrich digital control eliminates the confu-
Fan Control Buttons	sion of previous digital PTACs. The accurate temperature setting provides greater guest comfort than other systems.
QuietStart/Stop	The fan start and stop delays prevent abrupt changes in room acoustics due to the compressor energizing or stopping immediately.
	Upon call for cooling or heating the unit fan will run for five seconds prior to energizing the compressor. Also, the fan off delay allows
FanDelay
	for “free cooling” by utilizing the already cool indoor coil to its maximum capacity by running for 30 seconds after the compressor.
RemoteThermostat	Some applications require the use of a wall mounted thermostat. All new Friedrich PTACs may be switched from unit control to
Operation	remote thermostat control easily without the need to order a special model or accessory kit.
WirelessRemote	Guests can adjust the temperature and mode of the unit through the use of an optional hand held wireless remote, improving guest
ControlReady	comfort and relaxation.
InternalDiagnostic	The new Friedrich digital PTAC features a self diagnostic program that can alert maintenance to component failures or operating
Program	problems. The internal diagnostic program saves properties valuable time when diagnosing running problems.
ServiceErrorCode	The self diagnosis program will also store error codes in memory if certain conditions occur and correct themselves such as ex-
	treme high or low operating conditions or activation of the room freeze protection feature. Storing error codes can help properties
Storage
	determine if the unit faced obscure conditions or if an error occurred and corrected itself.
ConstantComfort	The on-board processor monitors time between demand cycles (heat or cool) and will cycle the fan every 9 minutes to sample the
	room condition and determine if the desired conditions are met. This allows the room to have similar benefits to a remote mounted
RoomMonitoring
	stat without the complication or cost of a wall mounted thermostat.
ElectronicTemperature	By limiting the operating range the property can save energy by eliminating “max cool” or “max heat” situations common with older
Limiting	uncontrolled systems. The new electronic control allows owners to set operating ranges for both heating and cooling independently
	of one another.
RoomFreeze	When the PTAC senses that the indoor room temperature has fallen to 40°F the unit will cycle on high fan and the electric strip heat
	to raise the room temperature to 46°F then cycle off again. This feature works regardless of the mode selected and can be turned
Protection	off. The control will also store the Room Freeze cycle in the service code memory for retrieval at a later date. This feature ensures
	that unoccupied rooms do not reach freezing levels where damage can occur to plumbing and fixtures.
Random Compressor	Multiple compressors starting at once can often cause electrical overloads and premature unit failure. The random restart delay
	eliminates multiple units from starting at once following a power outage or initial power up. The compressor delay will range from
Restart
	180 to 240 seconds.
DigitalDefrost	The new Friedrich PTAC uses a digital thermostat to accurately monitor the outdoor coil conditions to allow the heat pump to run
	whenever conditions are correct. Running the PTAC in heat pump mode save energy and reduces operating costs. The digital
Thermostat
	thermostat allows maximization of heat pump run time.

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