Fläkt Woods
3099 US 03.02
28
Specifications are subject to alteration without notice
PUMA (A–F) Rotary heat exchanger
TECHNICAL HANDBOOK
Sample Specification
ECONOVENT Rotary Heat Exchanger type PUM(A-F), manufactured by
Fläkt Woods, distributed by MUNTERS INTERNATIONAL, INC.. The
Manufacturer shall be ISO 9001 certified.
WHEEL (rotor)
- The wheel shall be made of layers of corrugated and alterna-
ting flat composite material or aluminum foil of uniform width to ensure a
smooth surface. This wheel material is bonded together to form a rigid transfer
medium forming a multitude of narrow channels thus ensuring a laminar flow.
The wheels shall be of proven design (available on the market for at least 15
years). Corrosion protected wheels shall be able to withstand environments
such as marine/coastal climates or industrial applications.
Type A: Non-hygroscopic aluminum wheel for recovering principally sensible
heat.
Type B: Hygroscopic aluminum wheel for recovering sensible and latent heat.
Type C: Edge-reinforced non-hygroscopic aluminum wheel for recovering
principally sensible heat.
Type D: Edge-reinforced hygroscopic aluminum wheel for recovering sensible
and latent heat.
Type E: Epoxy-treated aluminum wheel for recovering principally sensible
heat.
Type F: Hygroscopic composite material wheel with high corrosion resistance
for recovering sensible and latent heat.
The wheel can be fully wound or, on larger units, Sectorized, i.e. assembled in
segments. In the latter case, the segments are assembled between rigid spokes
thus ensuring structural longevity and allowing replacement of one or specific
segments only; or all of the segments can be replaced without having to remove
any spokes. The wheel shall be cleanable by spraying its face surface with com-
pressed air, low temperature steam or hot water or by vacuum-cleaning (on
type F wheels: compressed air or vacuum-cleaning only) without affecting its
latent heat recovery properties.
The wheels shall be tested in accordance with ASHRAE 84-78 method of
testing air-to-air heat exchangers.
The wheels shall meet test conditions for European standard and ARI 1060-97.
Development and manufacture shall meet all quality assurance criteria specified
in BS EN ISO 9001.