Desert Aire SelectAire Plus SP Series, Инструкция по установке и эксплуатации

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Desert Aire - SP Manual
• You may not need an auxiliary pump if the main pool pump has sufficient pressure to overcome the
elevation and the resistance of the water piping to the dehumidifier. If the main pump will be cycled on
and off, you must use an auxiliary pump.
• If you use an auxiliary pump and you intend to cycle the main pump, you must size the auxiliary pump
to overcome the resistance of the main pool piping and filters.
• The dehumidifier is equipped with a built-in flow switch. If there is no water flow to the unit, the
refrigeration circuit will be locked out of the pool water heating mode. All other modes, such as
dehumidification and cooling, will function normally. Desert Aire recommends continuous water flow to
the unit to prevent vapor lock, pump cavitation, and nuisance head pressure trips.
• You must install an air eliminator at any high points in the pool water piping. Excess air in the
Desert Aire pool water condenser will cause inadequate pool heating and high operating temperatures
and may shorten the life of the dehumidifier.
The dehumidifier may be equipped with pool heating on one or more circuits and may be equipped with pool
water heating. When pool water heating is included a factory supplied water temperature sensor and an
aqua stat well will be supplied per pool water circuit. See Section 2.8 for details on control and sensor
location.
Circuit
70 A / 80 A
70 B
80 B
Pool Water Flow Rate
and Pressure Drop
60 GPM @ 25 ft. W.C
70 GPM @ 25 ft. W.C
80 GPM @ 25 ft. W.C
Figure 11 – Standard Unit Water Flow Rates (for Units Equipped with this Option)
2.5 Auxiliary Air Heat Coil Piping
The Desert Aire dehumidifier may be equipped with an optional hot water or steam air heating coil. This
coil, when properly sized, will provide space heating during the winter months.
• You must use proper practice when you design and install the coil piping to prevent poor coil
performance, shortened service life, or damage to the coil.
• The supply connections must not be supported by the coil headers.
• The control valve should be sized according to the pressure and flow rate requirements, not
the coil connection size.
• On steam systems, size the trap for at least 2-1/2 times the design condensing rate to allow
for high condensate flow on system start-up.
• On steam systems, use strainers, dirt pockets, and isolation valves to prevent clogging the
control valve and to simplify service.
• Install swing joints in the connection piping to prevent damage to the coil header for thermal
expansion.
• Use a backup wrench on the pipe stubs when attaching connections to prevent damage to the
header.