Friedrich VRP12K, Service And Parts Manual

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INTRODUCTION
The Friedrich VRP® is a variable capacity system that utilizes Precision Inverter® technology to provide optimal space conditions.
While each VRP unit has a nominal capacity of 12,000, 24,000, OR 36,000 Btus, every unit has the ability to adjust Btu output based
on the actual room load. This equates to:
• Greater in‑room dehumidification from longer compressor run time.
• Lower energy costs by consuming less power.
• Greater occupant comfort due to smaller swings in room temperature and humidity.
The VRP accomplishes this by constantly monitoring various system and environmental inputs to vary the output of the unit.
The ability to vary compressor and blower speeds and the use of reheat coil enables the VRP to provide optimal comfort. With up
to 20.0 SEER and 10.0 HSPF, the VRP provides a highly efficient solution. Further, the Precision Inverter technology allows the heat
pump to operate at ambient conditions as low as 0˚F reducing the use of strip heat. This results in significant savings in operational
costs.
An optional integrated FreshAireTM system delivers up to 70 CFM of conditioned fresh air into the space. The fresh air is filtered
through a MERV 8 filter per ASHRAE 62.1‑2013, and is then conditioned through the unit’s primary DX coils backed by a reheat coil
that augments the unit’s dehumidification capability. This integrated fresh air solution provides the ability to potentially downsize or
eliminate additional make up air and humidity control equipment.
Friedrich’s wall controller is the main interface between conditioned space and the unit. The controller has seven back‑lit segment
displays that indicate the system mode (cool, heat, fan only), fan speed (low, high or auto), setpoint (°F or °C) or alternatively room
temperature (°F or °C).
The controller has an integrated temperature and humidity sensor that sends room status to the main control unit (MCU) to
determine operating modes and speeds of various components.
The wall controller also contains a motion sensor that wakes the wall controller from a sleep mode when not in use. This energy
saving feature eliminates annoying glow from the controller and the need to turn on lights at night to operate it.
The unitary packaged design means easier installation or replacement. Because the VRP is a packaged unit, it is installed as a
completely assembled refrigeration system. Unlike VRF or chilled water systems that require on‑site wiring, piping and sealing of
individual components, VRP units are assembled, charged and run tested under strict quality control guidelines in Friedrich’s North
American factory. Additionally, there is no need to locate the cooling tower or condensing units on the ground or rooftops where
green spaces can exist instead.
In sum, The Friedrich VRP offers a significant value to all parties involved in the design and construction of a new building.
Because of the simpler and more straightforward nature of the packaged design, and the ability to potentially downsize or eliminate
additional make up air and humidity control equipment, the VRP reduces much of the headache and complexity facing the design
engineer. Because the VRP is easy to install, with no complicated floor‑to‑floor piping and wiring involved, the contractor can
be confident of a high‑quality installation and get on and off the job more quickly. And finally, the owner gets the efficiency and
performance of larger, more complex and costly equipment, with a lower overall installed cost; and he/she virtually eliminates the
potential safety and service issues associated with systems that rely on thousands of feet of refrigerant or water piping running
throughout the building, including occupied spaces.