Installation and Operation Manual

20
Friedrich PTAC Digital Control and Unit 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 speci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 benet to the owner.
Digital Temperature
Readout
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 selected by owner.
One-Touch Operation
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.
Fan Speed Mode
The Friedrich PTAC/PTHP units feature two fan speeds and auto mode for the user to select from. This allows the
user to properly match the amount of airow for their comfort level and also deliver's quiet performance.
Individual Mode and
Fan Control Buttons
By having separate control buttons and indicators for both fan and mode settings the Friedrich digital control
eliminates the confusion of previous digital PTACs. The accurate temperature setting provides greater guest
comfort than other systems.
Quiet Start/Stop
Fan Delay
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 ve seconds prior to energizing 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.
Two-Speed Wall
Thermostat Mode
When connected to a wall thermostat the user can select from high or low fan speed at the thermostat, unlike
competitive models that have only one speed selection. This allow more comfortable and quieter operation.
Requires the use of Friedrich remote thermostat RT6 or equivalent thermostat with two speed fan output.
Remote Thermostat
Operation
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 accessory kit.
Internal Diagnostic
Program
The Friedrich digital PTAC features a self diagnostic program that can alert maintenance to component failures
or operating problems. The internal diagnostic program saves properties valuable time when diagnosing running
problems.
Service Error Code
Storage
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 feature.
Storing error codes can help properties determine if the unit faced obscure conditions or if an error occurred and
corrected itself.
Electronic
Temperature Limiting
By limiting the operating range the property can save energy by eliminating “max cool” or “max heat” situations
common with older uncontrolled systems. The new electronic control allows owners to set operating ranges for
both heating and cooling independently of one another.
Room Freeze
Protection
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 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 xtures.
Random Compressor
Restart
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 180 to 240 seconds.
Digital Defrost
Thermostat
The 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 saves energy and reduces
operating costs. The digital thermostat allows maximization of heat pump run time.