Specifications

20
4. There is an access valve in the liquid
line after the pump down valve. The
pump down valve can be manually
closed during start-up mode via the
controller. Add only as much refrigerant
as is needed to get to the total charge
indicated on the nameplate
. Never
charge liquid into the suction line
access valve!
5. The receiver has 2 sight glasses with
float balls to help ensure the maximum
and minimum refrigerant levels are
easily met.
3.0 Pool Water Chemistry. Pool water
quality directly affects space air quality, lifespan
and performance of the mechanical equipment.
Poor water chemistry is the single
biggest cause of indoor air quality
(IAQ) and corrosion problems in a
Natatorium.
Table 6 shows the National Spa and Pool
Institute recommended levels for water quality.
3.1 Chlorine smell in the pool area. The
chlorine smell that is often associated with indoor
pools is not actually the smell of excess chlorine
in the water but of that of off-gassed Combined
Chlorines. Combined Chlorines are a product of
insufficient free chlorine and can result in high
levels of bacteria and algae in the pool water.
Maintaining proper free chlorine levels will help
eliminate the foul odors.
The proper amount of outdoor air and exhaust air
to and from the space is also crucial to ensuring
chemical concentration levels are maintained
within acceptable levels.
The powerful chlorine smell that is
often associated with indoor
pools is NOT the result of too
much free chlorine in the water; it
is TOO LITTLE free chlorine that is
the culprit!
3.2 Filtration. Elevated concentrations of
biological waste and dissolved solids in water
have been shown to directly contribute to high
combined chlorine (chloramine) levels. It is
important to provide adequate water exchange
rates as well as proper treatment and filtration to
prevent any build up of these undesirable
components.
3.3 pH Level. High pH allows for scale formation,
which reduces pool water heater efficiency. Low
pH levels (acidic) are corrosive and may damage
the metal parts in pumps, water heaters and
piping. Maintaining pH levels between 7.2 and
7.6 are vital for the longest possible life for the
pool equipment.
Table 6 lists the NSPI recommended levels of
each.
Pools
Desirable Range
pH 7.4 – 7.6
Alkalinity 80 – 100 PPM
Free
Chlorine
2.0 – 3.0 PPM
Combined
Chlorine
0 PPM
Dissolved
Solids
100 – 300 PPM
Total
Hardness
225 – 250 PPM
Table 6 - National Spa and Pool Institute
Recommended Levels for Water Quality
3.4 Corrosion. The deterioration of the pool
building and equipment can result from poor
water chemistry. A well balanced pool with proper
water treatment and sufficient outdoor air/exhaust
air dilution offers an environment that will not
affect the health of the users or cause damage to
mechanical equipment or the structure.
Local codes generally require a separate,
ventilated space MUST be provided to store
pool chemicals.
DO NOT STORE POOL CHEMICALS IN THE
MECHANICAL EQUIPMENT ROOM!
Seresco has taken all possible commercially
feasible precautions to protect the NE Series
units against the corrosion caused by
accidentally high chemical levels. The equipment,
materials and paints are all resistant to airborne
chemicals for a short period of time.