HVAC Design Engineers

Protect your designs from the things you can’t control

Rawal APR Control is a variable-capacity solution for new & existing DX systems in a wide range of facilities and applications

Overview

Rawal APR Control:

Modify any DX system to operate as a modulating variable capacity system

Rawal APR Control is a variable capacity enhancement for new and existing DX (direct expansion) systems in a wide range of commercial and industrial facilities and applications that helps provide:

  • Tight temperature control
  • Better humidity control
  • Improved high-percentage outside air
  • System protection and reduced operational downtime

New technologies may not be right for every situation

New technologies like variable speed HVAC give you new ways to serve your customers. But they’re not right in every situation, can cost more, and may not be in-stock. Rawal APR Control is often easier to install and gets the job done right:

  • Repair existing in-place equipment
  • Avoid disagreements from call-backs and warranty issues
  • Maintain lasting relationships and secure future opportunities by keeping your projects within budget
Solutions

Simplify the equipment selection process

Accommodate load variability and changing criteria

Satisfy the customer’s desire for versatile HVAC equipment to accommodate future expansion

Reduce risk when selecting equipment for spaces with unknown variables

Avoid high humidity challenges in any application

Provide capacity modulation to extend compressor runtime

Improve your customer’s HVAC Energy Performance

Eliminate short cycling to keep the evaporator coil active

Provide true load-matching performance with up to 80% turndown

Protect Against:

High humidity

Temperature fluctuation

Excessive compressor cycling

Evaporator freezing/liquid flood-back on VAV applications

Unconditioned fresh air for ventilation requirements

Provide precision discharge air control

Optimize your HVAC equipment with less effort

Meet tight temperature and humidity requirements in specialized applications (Dew Point Control)

Achieve discharge air control within 1 degree deviation from temperature setpoint with the APR-E

New design & retrofit solution

New codes demand increased ventilation and fresh air

Provides variable capacity to standard DX units that weren’t originally designed for custom applications

Matches system’s capacity to meet new and ongoing occupancy restrictions

Value engineering option

Lower up-front costs without sacrificing performance

Ideal for projects with lead-time or budget constraints

For Key Benefits

Meeting & Exceeding Standard Equipment Energy Efficiency

Energy Efficiency Engineers Improve your customer’s HVAC Energy Performance

Saves power by reducing lift of compressor

Lowers operating costs by optimizing the HVAC system

OEMs Trusted and installed by major U.S. Manufacturers

Major OEMs offer the APR Control as a factory-installed modification, or for field installation when their systems require retrofit upgrades or service

Manufacturers use Rawal instead of FIOPS (factory-installed options) where accelerated delivery is required

Standardize designs across different geographic regions

Units with APR Control have the versatility to serve any environment

For Key Benefits

Energy Efficiency Engineers

Build in success from the start

Create satisfied customers and contractors

Energy Efficiency Engineers Improve your customer’s HVAC Energy Performance

Help the contractor deliver a properly performing system with less stress, per your design

Reduce call-backs and preserve warranty budgets, so contractors are more likely to install it than other options

Energy Efficiency Engineers

Improve HVAC system energy performance & lower operating costs

Save power by reducing lift of compressor to operate at a lower kW consumption

Lower operating costs by reducing fan motor speed with minimal risk

Reduce or eliminates the need for costly reheat of all types

For Trusted Solution

OEMs

Trusted and installed by major U.S. manufacturers

Major OEMs offer the APR Control as a factory-installed modification, or for field installation when their systems require retrofit upgrades or service

Manufacturers use Rawal as a standard component in select equipment lines

For Trusted Solution

National Account Engineers

Addition of the APR helps equipment to satisfy local codes in any geographic region

Standardize designs across different climates

Units with APR Control have the versatility to serve any environment

Resources
Additional

HVAC Design Engineer Resources

APR control energy efficiency

The APR Control provides alternative design strategies that have been proven to reduce total power consumption of a new or existing system installation/design.

APR Control vs. Hot Gas Bypass

The APR Control is an external compressor unloader that reduces the compression ratio as it diverts refrigerant from the outlet of the compressor back to the suction inlet.

APR Control for Ventilation & Fresh Air

The introduction of outside air with highly variable load creates the need for variable-capacity systems. APR Control enables the system to match capacity with changing load conditions.

Rawal apr control is a variable capacity enhancement to dx hvac systems.

The dynamic nature of plant growth cycles and cultivation phases demands air conditioning units that can adapt to changing environmental requirements. These HVAC systems play a critical role in maintaining optimal temperature, humidity, and ventilation conditions to support healthy plant development and maximize crop yield.

Industrial manufacturing facilities experience fluctuating occupant loads, demanding robust and adaptable HVAC systems.

The dynamic nature of production processes and workforce activities necessitates air conditioning units capable of adjusting to changing operational demands.

Any commercial retail or office space faces the same challenge – too hot/too cold and too humid being the top complaints. These problems are often driven by varying occupancy across commercial office spaces with  some companies on a regular 5-day in the office schedule while others are on a varied schedule.

The controlled environments within these facilities demand meticulous temperature, humidity, and air quality management. Fluctuating activities, such as experiments or surgeries, necessitate adaptable air conditioning units to maintain optimal conditions.

Restaurants and diners contend with fluctuating occupant loads, demanding adaptable air conditioning (AC) and heat pump (HP) systems. The ebb and flow of customers throughout the day necessitates HVAC units capable of adjusting to changing occupancy levels.

The dynamic nature of healthcare institutions, with varying patient admissions and discharges, requires air conditioning units to constantly adapt to changing occupancy levels. This flexibility is crucial for maintaining a comfortable and healthy environment for patients, staff, and visitors.

Schools face challenges with systems serving classrooms, providing fresh air for a lot of people in a small space.

This often leads to high humidity and equipment failure.