VHR SERIES
VENTILATION/HEAT RECOVERY PACKAGES
The VHR Series of Ventilation/Heat recovery
packages provides heat recovery, make-up air and exhaust in a compact packaged design for
rooftop or interior installation. Up to 80% of the exhausted energy can be recovered so
that ventilation rates can be economically maintained even while energy costs continue to
escalate. In new construction, the size of heating/ cooling equipment can be reduced,
resulting in lower capital costs.
FIGURE 1
ROTARY HEAT WHEEL EXCHANGER
Customer Benefits
Economical - Substantial
savings in operating and maintenance costs generally result in a pay-back period of two
years or less.
Simple to Operate- Remote
control panel with operating switches provides year around operation.
Easy to Service - Side
access panels permit unobstructed entry for motor and filter maintenance.
Quick Installation - Standard
unit is delivered assembled and wired.
Lightweight Rooftop Design
- Suitable for Curb Mounting. Conserves valuable interior space without imposing undue
structural problems.
Optional Supplementary Heater or
Cooling Coil tailored to available energy source.
Completely Safe - Less
than 1% of the exhaust products are transferred over to the supply air.
Energy is recovered by means of a regenerative type rotary
air-to-air heat exchanger, commonly called a heat wheel, depicted in Figure 1.
A fractional horsepower motor slowly rotates the wheel
between the exhaust and supply air streams flowing in opposing directions. The temperature
difference between the supply and exhaust air streams allows the wheel to reclaim heating
or cooling Btu's that would otherwise be lost to the atmosphere.
The specially designed wheel utilizes a unique process in
which alternating flat and corrugated sheets of aluminum are combined. Narrow flutes are
formed to provide passages for maximum contact between heat exchanger and air supply. This
construction produces a laminar flow heat exchanger with an exceptionally large heat
transfer surface, approximately 500 square feet of transfer area per cubic foot of heat
exchanger. High efficiency results from the combination of large surface area and slow
wheel rotation. Depending on the treatment applied to the aluminum wheel surface, either
sensible heat or sensible plus latent heat (moisture) may be recovered.
Two VHR series models are available to meet the needs of a
vast variety of applications:
VHRS- A general purpose unit with bondex coated wheel for
recovery of sensible heat in non-corrosive exhaust applications up to 150'F.
VHRE - A model with a desiccant coated wheel for recovery
of both sensible and latent heat in air conditioned buildings or corrosive exhaust
applications.
Standard Features
- Heat recovery wheel with air seals, belt driven by
fractional horsepower constant-speed gear motor. Choice of two wheel types:
- "S" - Bondex coated wheel for sensible heat
recovery in non-corrosive exhaust applications up to 150'F
- "E" - Desiccant coated wheel for total heat (both
sensible and latent) recovery in air-conditioned buildings or corrosive exhaust
applications
- Weatherproof housing for rooftop mounting with lifting lugs,
drain connections, side access panels and base frame.
- Forward curved, double width/double inlet class 1 fans with
open drip-proof motors for both supply and exhaust.
- Supply air intake louver, birdscreen and back-draft damper.
- Exhaust air back-draft damper.
- Warm-side of exhaust insulated with 1" thick
fiberglass for greater energy retention.
- Banks of filter racks for fresh and exhaust airstreams. (Use
2" cleanable filters only). Filters optional.·* Factory-wired controls and starters.
- Remote-control panel with operating switches and indicating
lights.
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