Unit installation

SOLAR PANELS

If you have a solar system plumbed in the same system

as the heat pump, you may experience static pressure

on certain brands of solar panels. Often times the pres-

sure switch will detect back pressure created from el-

evation of the solar panels.

Some solar systems may reverse flow (drain) when the

circulation pump shuts off. This may cause problems

with the internal "pressure" switch. In some cases you

may have to add check valves to control the reverse

flow. Check with the solar panel manufacturer or in-

staller before using check valves. Make sure that your

solar system is capable of draining into the pool, via a

vacuum relief valve.

These and other conditions may require the use of this

added type of flow switch or special use water pressure

switch. Reverse flow and static pressure may allow

the unit to run without water flow or cycle off and on,

causing damage.

The added “flow” switch only detects water movement

and will not be effected by static, low or high pressure,

therefore, it is best suited in these situations.

BELOW WATER LEVEL

If the unit is installed three feet or more below water

level, the pressure switch will be effected by static pres-

sure. This static pressure may cause the “pressure"

switch to stay activated thus allowing the unit to run

when the water flow stops. You then may require the

external flow switch or the special use water pressure

switch.

LONG RUNS & LOW FLOW

The "flow" switch or special water pressure switch may

be needed on systems when the heater is installed more

than 30 or 40 feet from the circulation pump. Weak or

heavy load filtering systems will slow the water flow

and cause the standard water pressure switch to cycle.

SUCTION LEAKS

Be advised that suction leaks that allow air into the sys-

tem will cause erratic operation of the water "pressure"

switch and water "flow "switch. The air turbulence

causes the switch to malfunction.

OPTIONAL WATER "FLOW" SWITCH

Some installations require an external water “FLOW” switch in place of the water “PRESSURE” switch. This

switch will keep the unit from running without water flow.