Specifications

25
POPULAR CONFIGURATIONS AND SYSTEM DESIGNS
Specific market segments have gravitated
towards unit designs because of their overall
features, ease of installation, first cost and
system performance:
Hotel and Residential Market
These are smaller pools with light usage
compared to institutional pools. Besides the pool
water heating option, they tend to go without
some of the other heat recovery options that
are usually incorporated into larger units. This
configuration is usually refrigeration based with
the outdoor ventilation air connected directly to
a special intake at the unit. The space heating
coil is also mounted internally. The exhaust fan
is usually installed in the space with its intake
over the hot tub. They tend to be vertical units
and installed in the pool filter room. The air
conditioning heat rejection is to a remote outdoor
air-cooled condenser.
Heat Recovery on minimum
outdoor air and exhaust air
Outdoor ventilation air is essential for maintaining
good IAQ in the pool and is a code requirement.
The natatorium also needs to be maintained at
a slight negative air pressure, so warm energy rich air
needs to be exhausted. These two airstreams at vastly
different conditions present a perfect opportunity for
heat recovery.
Seresco provides unit mounted heat recovery between
these two air streams using a glycol run-around
loop. This approach to heat recovery offers the best
performance and design flexibility while staying in the
smallest possible cabinet. They are also easily sized to
meet the specific requirements of your facility. The result
is a compact, cost effective heat recovery option that
actually fits into a mechanical room.
Adding the glycol run around loop heat
recovery option to your Seresco unit in a
northern installation will typically realize a one
year payback on your investment!
• The heat recovery device should be suitably
protected from corrosion and freezing.
Condensate Reclaim
Verify with local codes whether condensate return
to the pool is allowed. While condensate is generally
considered gray water, this condensate is actually
cleaner and if introduced upstream of the filters and
chemical treatment can help realize considerable water
savings on site.
• If allowed by local codes, the condensate reclaim
from your Seresco unit can be the equivalent of one
pool fill annually!
Refrigerant Reduction
Seresco’s new Protocol design reduces the
refrigerant system charge compared to a traditional
compressorized direct expansion type unit by a
whopping 75%! There is no operation penalty to
this new design and is quickly becoming the new
industry standard.
• The Protocol unit’s refrigerant charge is so low
that no special ventilation may be required in the
mechanical room!
Popular Configurations and System Designs
Figure 14 – Vertical Unit Configuration