The Two-Stage Principle
Canada is a country of widely varying temperatures from season to season. In-house research has shown a typical building requires its total designed heating capacity only 10 percent of the heating season. The RE-VERBER-RAY two-stage HL SERIES was specifically developed to more efficiently meet the heating requirements of the other 90 percent of the heating season. These two graphs reproduced with permission from an RDM Engineering report, dramatically demonstrate the operating differences between the two­stage and single input infrared heating alternatives. With single-stage systems heaters run on 'high-fire' all the time. With Re-Verber-Ray HL Series heaters, two-stage technology means that the "high-fire' mode is really only needed ten percent of the heating season, resulting in energy savings year after year, as well as an enhanced employee comfort level.

Independent Testing Conclusions Independent test data has compared the fuel efficiency of two-stage versus single stage infra-red heating and conclusively demonstrated that RE-VERBER-RAY two-stage technology used in the HL SERIES results in a clearly more efficient heating system over standard single-stage. Highlights of the conclusions from the Technical Reports produced include: 1. A significant reduction in the number of on­off cycles (a reduction of some 35 percent) resulting in increased energy savings, improved comfort and extended product life. 2. Conceptual analysis showed a minimum 12 percent energy saving utilizing two-stage technology, when compared with single-stage. Ongoing independent testing comparing the HL SERIES with a competitor's single stage heating system has documented an average of 33.5 percent in energy savings utilizing RE-VERBER-RAY two-stage technology. 3. For really cold Winter days - about ten percent of the heating season - full heat output is readily available with the "high -fire" mode of two-stage technology. By more closely paralleling actual heating requirements and using the "low-fire" mode for 90 percent of the heating season, there is clearly enhanced employee comfort level in the work environment. 4. The greater overall performance efficiency of the RE-VERBER-RAY two-stage technology used in the HL SERIES results in a cleaner environment.

Overall System Features
Two-stage flexibility ensures maximum comfort and efficiency through a "calculated input differential" - the difference between "high-fire" and "low-fire" levels of operation. The overall design efficiency provides greater flexibility in new and retrofit applications through modular construction which allows radiant tube configurations accommodating 45, 90 or 180 degree elbows. Optional outside combustion air allows combustion air and heater controls to be isolated from adverse conditions. The HL SERIES is approved by the Canadian Gas Association (CGA) for vented or unvented use.

Exchanger Features
The combustion chamber tube and radiant tubes are manufactured from four inch diameter 16 gauge titanium alloyed aluminized steel and 16 gauge aluminized steel Type 1 respectively for corrosion resistance and exceed the ML 500 hour salt spray test. The exchanger coupling system utilizes a "slip fit" system, as well as a four inch band clamp for added security and a continuous linear appearance. The exterior coating of the exchanger is specially blended for maximum emissivity, corrosion resistance and architectural appeal. The final component in the system, the turbulator baffle, is designed to maximize heat transfer and minimize exhaust loss.


Engineered Reflector Design
Fully adjustable polished aluminum parabolic reflectors complete with end caps can be installed at angles from 0 to 45 degrees directing heat only where required. The integrated hanging system includes state-of -the-art hangers and a unique reflector tension spring that prevents reflector vibration - all easily installed without tools.

Control Box Features
Staging indicator lights mean continuous monitoring of the HL SERIES for optimal energy savings. The fixed metering orifice provides maximum combustion efficiency from factory preset parameters. Dual safety pressure switches continuously monitor burner operation and the proven globar ignition system (HSI) assures ignition under adverse conditions. The burner sight glass allows the globar operation to be monitored easily from the floor. Included is the industry leading MICRO 6OU-24, a self-diagnostic microprocessor based control that incorporates pre and post purge firing as well as "hard" and "soft" lockout. "Hard lockout" for complete 100 percent heater shutdown of the burner and fan which can only be restarted by resetting the thermostat and "soft lockout" which facilitates an automatic 30 minute restart if the heater goes out because of environmental conditions (i.e. winds that exceed 40 miles (66 km) per hour.)


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