Hybrid Installation - Well-Connect WCVC-16 Installation Manual

5. Hybrid Installation

Ductwork:
a. Use good judgment and proper industry practices when
designing a duct distribution system for the Well-Connect.
The ductwork must be arranged such that the Well-Connect
is in parallel with, rather than in series with, the fossil fuel
furnace. Supply air (and return air, if applicable) must be
routed through ductwork suitable for carrying and
distributing 600 CFM for Model WCVC-16 or 1000 CFM for
Model WCVC-24 with no more than ½" total static pressure.
Ideally this can be accommodated even when both the Well-
Connect and fossil fuel furnace are on at the same time. In
rare applications it may be necessary to only run one at a
time, or create a separate return duct for the Well-Connect.
It is up to the installer to determine if this is both possible
and practical based on actual trial and pressure
measurements, as well as installer experience. Some sites
may meet the requirement, while some may require
ductwork modifications, and still others may simply not be a
good fit for this type of Well-Connect application. Installers
MUST run the Well-Connect along with the second stage
systems (in both heating AND cooling modes, if
applicable), until steady-state operation is achieved,
and ensure all system Δ Ts remain within acceptable
ranges for the equipment involved.
b. If the return is not ducted, make sure there is a clear,
unobstructed return air path from the discharge point(s)
back to the unit.
c. Keep in mind, any exposed supply ductwork may sweat
when the Well-Connect is used for air conditioning and duct
insulation may be in order.
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