Common Questions

Page 11 of 12

exists for removing the unit in its crated state, unpack the unit and inspect it. This will reduce the
weight down to 134 lbs. and two people can easily handle it.

34. Can the PCS1 cool down a hot pool?

Yes: The PCS1 can be manually turned on during the evening hours to cool down an
overheated pool. In this case, the heat exchanger will work in the reverse mode. The hot pool
water will be routed up to the PCS1 while cooler attic air will be drawn across the heat exchanger.
This manual operation ignores the temperature control sensors. To be effective, some ventilation
must be present in the attic to allow the heated attic air to escape into the atmosphere.

Cooling down an overheated pool is a common need during the hot summer months in
some parts of the country.

35. Can the PCS1 be fully automated?

Yes: The PCS1 can be fully automated by installing the Compool LX220 temperature
controller available from SolarAttic, Inc. An electric valve actuator [VOR for valve operator]
physically sits on top of the bypass valve. When heat is available for the pool or spa, the controller
automatically turns the VOR, which then turns the shaft of the bypass valve to the correct position.
The pool owner simply sets the desired temperature on the controller.

36. Can the PCS1 be controlled in an inexpensive way?

Yes: The PCS1 can be semi automated by using the existing pool’s timer in conjunction
with a manual bypass valve and a daylight sensor. The bypass valve is left in the on position. The
pump timer operates the pump during daylight for 10 hours. The light sensor ensures the pump
only runs during daylight.

This simple automation assumes that when it is daylight, heat will be available. It has some
drawbacks and limitations. First, if heat is not in the attic, the PCS1 could operate in the reverse
mode and may actually be cooling down the pool. Second, filtration time may be confused by lack
of sunlight. An alternate method is to simply operate the bypass valve manually each day.

For best results, the company recommends that the PCS1 be fully automated so maximum
heat can be extracted automatically from the attic and put into the pool.

37. Can the PCS1 be used for year around heating of my pool?

Generally, No: The PCS1 will function year around in many locations taking out all
available heat from the attic and putting it into the pool. However, a more appropriate question is:
"Will the PCS1 heat my pool to 85 degrees year around?"We do not know of any location where
the PCS1 will do this in the United States. We also do not know of any location where solar
panels will do this in the United States. As a rule of thumb, the PCS1 will usually perform as well
as a solar panel system that is properly sized. Even in southern parts of the USA, solar energy
wanes and does not work well during the months of November through January. By mid
February, solar energy begins to intensify and it performs better for the pool. You can expect to
significantly lengthen your swimming season with the PCS1. And, your enjoyment of the pool
will be much greater. However, in the USA if you want year around heating of the pool, you will
need to augment the PCS1 with a conventional heater during non-solar periods. In some tropical
areas, we expect that the PCS1 would heat the pool year around to a comfortable temperature.

Common Questions

Page 12 of 12

38. What are some benefits of the PCS1 swimming pool heater?

Energy savingsthat put money into your pocket. The PCS1 pays for itself!

Personal satisfactionreducing the "ozone problem" by not using

chlorofluorocarbons.

Personal satisfactionin reducing the "greenhouse" problem by not using fossil fuels.

Personal satisfactionin using an alternative renewable solar energy resource.

• The aesthetic beautyof enjoying solar energy benefits without "ugly & obtrusive" roof

panels.

• The comfort & luxuryof swimming in a warmer swimming pool.

• The relief from budget busting energy billsand “restrictive energy use laws”.

• The additional energy savingsfrom reduced or eliminated air-conditioning costs.

• The availabilityof electricity to run the PCS1 as opposed to natural gas and other fossil

fuels.

• The practicality of using attic heat to solve your swimming pool heat needs.

• The fast paybackperiod and knowing that the system will result in continued energy

savings.

• Having a solardevice that heats your pool without all the problems of solar panel

devices.

DICTIONARY

OF

TERMS