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010.4150.0720 08.21
1. PRODUCT INFORMATION
1.1 FUNCTION
The VHX-DR, Vortex Heat Recovery Center, is a unique and
highly efficient economizer system with a built-in bypass.
It is a fully packaged light weight product with a round
configuration for ease of installation. The all 316L stainless
steel construction allows it to be used for both condensing
and non-condensing applications without any modifications.
It is extremely compact compared to traditional economizers
as it utilizes a modular design with one or more heat modules
that each have supply and return connections representing
individual liquid circuits. Individual circuits can be connected
to one or more common headers in accordance with the
specific application.
The modular design allows the economizer to be used for
multiple applications at the same time: one module can be
used for preheating of feedwater, one module for domestic
hot water, and one module for direct pool heating etc.
The unique economizer design creates a turbulent flow
across the module surface, thus maximizing heat transfer.
The modules are designed to handle asymmetric volume
flows with exceptionally high performance and are mounted
in individual slots - an easily serviceable configuration.
A modulating, multi-blade damper design provides bypass
capabilities for use with dual fuel applications, and also
prevents over-heating of the heat modules.
In most applications, the economizer is fully designed and
packaged with an automated mechanical draft system
capable of optimizing the exhaust rate of the appliance to
completely stabilize the appliance efficiency combustion
as well as to assure a proper and constant draft for the
appliance. This allows a single economizer to serve multiple
boilers no matter whether they are of atmospheric, fan-
assisted or forced draft design.
The VHX-DR is virtually maintenance free, having no moving
parts except the internal gas bypass assembly.
The performance of this type of exchanger is ultimately
dependent upon the dynamic conditions of temperature,
pressure and massflow available on both the liquid and gas
side.
The custom transitions offered fit most commercial pre-
fabricated chimney systems.
The VHX-DR Heat Recovery Module should only be used
with appliances operating on Natural Gas, LP-Gas/Butane
or low sulfur fuel oil (#2 through #6). In some exhaust
applications containing debris etc., cleaning may be required
periodically.
