Friedrich PTAC - R410A service manual Friedrich Digital Control Features, Digital Temperature

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 specifi cally designed control software for the PTAC industry Friedrich has accomplished what other Manufacturer’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 benefi t to the owner.

Digital Temperature	By digitally monitoring desired room temperature the room is controlled more precisely than conventional
	systems. The large, easy to read LED display can show either set-point or actual room temperature as
Readout
	selected by owner.
One-Touch	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
Operation	takes guess-work out of unit control delivering a more enjoyable experience and eliminating front-desk
	calls.
Individual Mode and	By having separate control buttons and indicators for both fan and mode settings the Friedrich digital con-
	trol eliminates the confusion of previous digital PTACs. The accurate temperature setting provides greater
Fan Control Buttons
	guest comfort than other systems.
Quiet Start/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 fi ve seconds prior to en-
Fan Delay	ergizing the compressor. Also, the fan off delay allows for “free cooling” by utilizing the already cool indoor
	coil to its maximum capacity by running for 30 seconds after the compressor.
Remote Thermostat	Some applications require the use of a wall mounted thermostat. All new Friedrich PTACs may be switched
	from unit control to remote thermostat control easily without the need to order a special model or acces-
Operation
	sory kit.
Wireless Remote	Guests can adjust the temperature and mode of the unit through the use of an optional hand held wireless
Control Ready	remote, improving guest comfort and relaxation.
Internal Diagnostic	The new Friedrich digital PTAC features a self diagnostic program that can alert maintenance to compo-
	nent failures or operating problems. The internal diagnostic program saves properties valuable time when
Program
	diagnosing running problems.
Service Error Code	The self diagnosis program will also store error codes in memory if certain conditions occur and correct
	themselves such as extreme high or low operating conditions or activation of the room freeze protection
Storage	feature. Storing error codes can help properties determine if the unit faced obscure conditions or if an error
	occurred and corrected itself.
Constant Comfort	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 Monitoring	room to have similar benefi ts to a remote mounted stat without the complication or cost of a wall mounted
	thermostat.
Electronic	By limiting the operating range the property can save energy by eliminating “max cool” or “max heat” situ-
Temperature	ations common with older uncontrolled systems. The new electronic control allows owners to set operating
Limiting	ranges for both heating and cooling independently of one another.
	When the PTAC senses that the indoor room temperature has fallen to 40°F the unit will cycle on high fan
Room Freeze	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 off. The control will also store the Room Freeze cycle
Protection
	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 fi xtures.
Random	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
Compressor Restart
	power up. The compressor delay will range from 180 to 240 seconds.

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