Seresco NP Series Operation And Maintenance Manual page 7

Standard NP series dehumidifiers are semi‐custom: while basic concept and layout is the same, options and
specific systems and components layout and location may vary from one dehumidifier to another. One of the
typical dehumidifier arrangement is shown on Pic.C.1.
Dehumidifier Options

Indoor or outdoor installation.
o
Note: Pic. C.1. shows outdoor model, equipped with louvers (to protect air intake and discharge
openings from elements). Indoor model would have ducts connected to respective openings, no
louvers would be needed.

Capacity (number of compressors) – two to four compressors (see Dehumidifier Optional Arrangement below
for more details):
o
Two‐compressor dehumidifier option (18 to 80 tons, models NP018 to NP080).
o
Three‐compressor dehumidifier option (90 to 100 tons, models NP090 to NP100).
o
Four‐compressor dehumidifier option (128 tons, model NP128).

Airflow/ductwork connection *. Pic. C.1 shows some options only; each option location availability depends on
the dehumidifier installation (indoor or outdoor) and other options:
o
Return Air (RA) ductwork connection ‐ top, bottom, end, sides.
o
Supply Air (SA) ductwork connection – top, bottom, sides.
o
Optional Min Outdoor Air (OA) ductwork connection/termination – top, sides.
o
Optional Min Exhaust Fan (EF) and Purge Fan (PF) ductwork connections/terminations – end, sides.
o
Optional Purge Outdoor Air (POA) ductwork connection/termination ‐ top, sides.

Optional Pool Water Heating **.
o
Dehumidifier can accommodate up to two pool water heating circuits

Optional Space Heating ‐ hot water coil, electric or gas heater ***.

Optional Heat Recovery (HR) circuit.

Air Conditioning (AC)* – external water cooling or fluid cooler (packaged or separate).
o
Note: Pic. C.1 shows outdoor model with "packaged" fluid cooler (mounted with the dehumidifier).
"Packaged' AC option is available for outdoor models only; alternatively, indoor and outdoor models
could be fitted for separate/remote AC option – remote fluid cooler or other external cooling media
source.
*
Some available options (tonnage, ductwork connections, AC options etc.) are shown. Refer to the submittal
and other relevant documentation for your dehumidifier's options.
** The pool water heating option relies on compressor‐created excess heat and is used as an additional
heating source. It does not eliminate the need for a main pool water heater.
*** For specific details on space heating (hot water, gas, electric) option, refer to the submittal and other
documentation:

Gas‐fired duct heater can be installed internally (fitted inside the dehumidifier at the factory) or provided for field
installation (to be fitted in the supply air ductwork).

Electric heater or hot water coil, depending on capacity, model, size, etc., can be installed externally (mounted on the
top of SA opening or fitted in the supply air ductwork) or internally. Refer to your dehumidifier's submittal
documentation.
CAUTION!
For equipment proper operation, maintenance and service, respective clearances should be
maintained. Generally, 30" clearances to the equipment must be kept for the maintenance and service purposes.
For the specific required clearances information, as well as dehumidifier overall dimensions, distances to pipe
connections, duct connections etc., refer to the submittal documentation.
C – General Information
Attention! Equipment Clearances and Dimensions!
4
C‐