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10 WSHP-PRC001-EN
Boilerless Control/Electric Heat
(option)
In cooling dominant regions where
heat may be used 15 to 30 days out of
the winter season, eliminating the
boiler may be an economical advan-
tage to the building owner. Eliminat-
ing a boiler from the system reduces
costs associated with the mechanical
system installation, as well as the
maintenance and service of the boiler.
How can heat be provided for the few
days of the year when heat is neces-
sary? Through the water-source heat
pump of course. The advantage of the
water-source heat pump is it’s ability
to provide heat recovery within the
closed water-loop. While some
WSHPs may be extracting heat from
the closed water loop, other WSHPs
may be adding heat to the closed
water loop. This creates a perfect sys-
tem balance for heat sharing or move-
ment from one space to another.
But when water temperatures fall in a
boilerless system, and no further heat
recovery may be made via the closed
loop, heat may be added to the space
through a boilerless control electric
heat option. See Figure 17 for the boil-
erless control, electric heat system
diagram.
With the boilerless electric heat
option, the heat pump encompasses
an internal nichrome open wire heat-
ing element (factory mounted and
wired). It is comprised of a single
stage of electric heat designed to
invoice an electric heater in place of
the compressor in the event entering
water temperature falls below 55 F or
a field adjusted temperature setting
between 25 F to 60 F.
Features and
Benefits
Figure 17: Boilerless control, electric heat system
What is NOT available with the boilerless electric heat option?
1 Hot gas reheat
2 Basic 24 volt controls
3 Tracer
TM
ZN510 controls
4 115 and 575 volt ratings
5 Supplemental or emergency heat applications