Jandy AE-Ti Installation And Operation Manual - page 24
Page 22
On some installations, the piping from the heat
pump to the pool is very short. The back pressure
could be too low to trigger the pressure switch. If this
happens, it may be necessary to install a directional
fitting or elbows where the return line enters the
pool. This will increase back pressure enough for the
heat pump to operate properly. If this configuration
is necessary, be sure to check that the system flow is
above the minimum requirement of 30 gpm after the
direction fitting or elbow has been installed.
Make sure the pool filter is clean before making
any pressure switch adjustment: A dirty filter will
restrict the water flow and the pressure switch cannot be
adjusted properly.
To adjust the pressure switch:
1. Be sure that all valves in the system are set to
allow water fl ow through the heat pump. Start the
fi lter pump.
2. Set the heat pump control to call for heat. Set the
On/Off switch on the heat pump control to the
ON position. If the heat pump was installed with
the Auto-Heat feature, set the mode to TIME so
that the heat pump will turn on if water is fl owing
through the heat exchanger.
3. If the heat pump control displays “LOW H
2
O
FLOW”, then the fl ow in the system may be below
the minimum fl ow of 30 gpm needed for the safe
operation of the heat pump. Investigate and correct
any fl ow problems before adjusting the water
pressure switch.
4. Remove the heat pump’s control access panel. The
water pressure switch is located in the lower left
corner of the control compartment.
5. After confi rming the fl ow rate is at a minimum
of 30 gpm, slowly rotate the thumb wheel on
the water pressure switch in a counterclockwise
direction until the “LOW H
2
O FLOW” indicator
disappears from the control display. Remember
that there is a time delay before the heat pump
compressor will start.
6. Once the heat pump is running, turn off the fi lter
pump. The heat pump should turn off immediately.
7. If the heat pump continues to operate when the
fi lter pump is off, turn the thumb wheel on the
water pressure switch in a clockwise direction
until “LOW H
2
O FLOW” is displayed on the
control and the heat pump shuts down.
8. Check the setting of the water pressure switch by
starting and stopping the fi lter pump and checking
the control display and operation of the heater
between each fl ow change.
9. If the water pressure switch cannot be adjusted
to accommodate the conditions listed above,
an external fl ow switch must be added to the
plumbing system to ensure that the heat pump will
not operate without the proper fl ow through the
heat exchanger.
Section 6. General Maintenance
6.1 Water
Chemistry
Proper chemical balances are necessary for
sanitary bathing conditions as well as ensuring your heat
pump’s long life. Be sure to keep your chemical and
mineral concentration levels within the values indicated
in Table 2.
NOTE For spas, it is also necessary to perform water
changes in addition to chemical treatment. It is
recommended to change the spa water every
60 days for light usage and every 30 days if
usage is heavy.
6.2 Winterizing
CAUTION
Failure to winterize could cause damage to the
heat pump and will void the warranty.
ATTENTION
La garantie sera annulée si l’appareil n’est pas
hivernisé convenablement.
PRECAUCIÓN
La falta de acondicionamiento de la bomba de
calor para el invierno podía causar daños y
anular la garantía.
In areas where freezing temperatures occur, you
should protect your pump, filter, and heat pump from
the elements. Perform the following steps to completely
drain the heat pump (see Figure 17).
1. Turn off the electrical power to the heat pump at
the main breaker panel.
2. Shut off the water supply to the heat pump.
3. Disconnect the water inlet and outlet unions
located on the lower front panel of the heat pump.