Service and Parts Manual (2016, 2017, 2015)

21 PB
OPERATION
Function and Control
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.
Instant Heat In Pump
Mode
Heat pump models will automatically run the electric heater to quickly bring the room up to
temperature when initially energized, then return to heat pump mode. This ensures that the
room is brought up to temperature quickly without the usual delay associated with heat pump
units.
Even Heat Monitoring The digital control monitors indoor conditions to ensure that the room temperature is within
5 degrees of the setpoint. If necessary the unit will cycle the electric heat to maintain the
temperature. This feature ensures guest comfort by delivering the heating of an electric
heater while maintaining the efciency of a heat pump.
Separate Heat/Cool Fan
Cycle Control
"The owner may choose between fan cycling or fan continuous mode based on property
preference. (Note: Even heat monitoring and quiet start/stop fan delay only operate in fan
cycle mode) Fan continuous mode is used to keep constant circulation in the room during
all times the unit is ‘ON’. Fan cycle will conserve energy by only operating the fan while
the compressor or electric heater is operating. The ability to set the fan cycling condition
independently between heating and cooling mode will increase user comfort by allowing the
choice of only constantly circulating air in the summer or winter time. Unlike other PTAC
brands that only allow one selection."
Emergency Heat Override In the event of a compressor failure in heat pump mode the compressor may be locked out
to provide heat through the resistance heater. This feature ensures that even in the unlikely
event of a compressor failure the room temperature can be maintained until the compressor
can be serviced.
Desk Control Ready All Friedrich digital PTACs have low voltage terminals ready to connect a desk control energy
management system. Controlling the unit from a remote location like the front desk can
reduce energy usage and requires no additional accessories on the PTAC unit.
Indoor Coil Frost Sensor The frost sensor protects the compressor from damage in the event that airow is reduced or
low outdoor temperatures cause the indoor coil to freeze When the indoor coil reaches 30° F
the compressor is disabled and the fan continues to operate based on demand. Once the coil
temperature returns to 45° F the compressor returns to operation.
Ultra-Quiet Air System The new Friedrich PZ series units feature an indoor fan system design that reduces sound
levels without lowering airow and preventing proper air circulation.
High Efciency The Friedrich PTAC benets from quality components and extensive development to ensure a
quiet, efcient, and dependable unit.
Dual Motor Friedrich's new dual motor design allows for the quietest and most efcient units yet.
Rotary Compressor High efciency rotary compressors are used on all Friedrich PTACs to maximize durability and
efciency.
Stainless Steel Endplates Outdoor coil endplates made from stainless steel reduce corrosion on the outdoor coil
common with other coil designs.
Top Mounted
Antimicrobial Air Filters
All Friedrich PTAC return air lters feature an anti-microbial element that has proven to
prevent mold and bacterial growth in laboratory testing. PDXRTA replacement lter kits
feature the same anti-microbial agent. All lters are washable and reusable and are easily
accessed from the top of the unit without the removal of the front cover.
Filtered Fresh Air Intake Friedrich PTAC units are capable of introducing up to 75 CFM of outside air into the
conditioned space. The outdoor air passes through a mesh screen to prevent debris from
entering the air stream.