ASHRAE Journal - July 2019 - 109

Suppliers' New Product Preview Advertising Section
Achieve the Performance of a Chilled Water System on a DX Budget!

or over 25 years, Rawal Devices' mechanical APR Control
has been solving oversized air-conditioning challenges. The
APR Control® has proven to be a reliable solution in thousands
of applications; providing continuous capacity modulation for
DX systems for short cycling and dehumidification. Our triedand-true electronic APR-E™ Valve provides a unique solution
for maintaining precise control for temperature and stability.
Resetting the discharge air temperature based on space
conditions or energy requirements is becoming the rule rather
than the exception. With our electrically driven & electronically controlled APR-E, that serves as a digitally responsive
external compressor unloader for capacity modulation, you
now have the ability to control any single or multi-stage DX
system to a precise discharge air setpoint. Equipment or system
design limitations make direct control of discharge air almost
impossible otherwise.
Until the APR-E™ Valve, there has been no cost-effective
way to modulate a fixed compressor to a precise discharge air
set-point! The APR-E will regulate the amount of refrigerant
flow entering the evaporator by diverting the discharge gas into
the suction line before the compressor, modulating the cooling
capacity of the evaporator. As the discharge air temperature
falls below setpoint, the APR-E™ Valve can be controlled to

open and begin modulating. This action decreases the amount
of refrigerant to the evaporator, resulting in a higher discharge
air temperature off the coil.
Conversely, as the discharge air temperature rises above
setpoint, the APR-E can be controlled to modulate towards
the closed position. Now increasing the amount of refrigerant
to the evaporator, decreasing the discharge air temperature
off the coil.
With the APR-E you can obtain the versatility offered in
other high-priced systems or modulating technology while
remaining budget friendly!
* Able to achieve superior system performance by precisely
controlling discharge air to within +/- 1° deviation from
set-point (or less)
* Integrated into BAS/BMS or as a Stand-Alone Control
* Easily installed on New or Retrofit Systems
* The APR-E allows you to meet energy code demands
Learn how to achieve the performance of a chilled water
system on a DX budget; Join us for a live webinar on
Wednesday, July 24, 2019 at 1:00 P.M. ET to learn more
about our APR-E™ Valve, or call us today for assistance.

PRECISION DISCHARGE AIR CONTROL
WITH THE RAWAL APR-E VALVE ™
Control any single or 2-stage DX system to a precise
discharge air setpoint with our electrically driven &
electronically controlled APR-E™. This Rawal Valve
is an external compressor unloader for aftermarket
installations. The APR-E™ provides modulation
for any DX air-conditioning system and is easily
integrated into an existing BAS/BMS or with a
stand-alone controller for New or Retrofit Systems.

THE
OBTAINILITY
FLEXIB ILLED
OF A CHSYSTEM
WATER N A
O
GET!
DX BUD

* Dew Point Control for critical environments
* Applicable to any VAV/MUA/DOAS systems
* Reset DAT to minimize reheat for
energy savings
RAWAL DEVICES, INC. | PHONE: 800.727.6447
FOR MORE INFORMATION VISIT: WWW.RAWAL.COM
SEND ALL INQUIRIES TO: SALES@RAWAL.COM
J U LY 2 0 19

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ASHRAE Journal - July 2019

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