Water Pressure Switch Adjustment; Section 6. General Maintenance; Water Chemistry - Jandy JE1500T Manuel D'installation Et De Fonctionnement

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Jandy ® JE Heat Pumps
the Set Point Lockout, press and hold the Up and Down
buttons for 5 seconds. The unit will display SET POINT
UNLOCKED .
5.6

Water Pressure Switch Adjustment

CAUTION
The water pressure switch should be adjusted
to turn the heater off when the pump is off.
Setting the switch to close at too low of a flow
can damage the appliance. Adjust the switch
to turn the heater off, not on.
The pressure switch is preset at the factory for
activation at 2 psi (14 kPa). This is the minimum setting
for the water pressure switch and works for all basic
installations. Only adjust the water pressure switch if
the heat pump does not operate when the proper flow
is applied to unit or if the heat pump does not shut
off when the filter pump is off. Occasionally, unusual
plumbing configurations or necessary restrictions in
the plumbing may cause pressure sensing problems. In
these rare situations, the plumbing system configuration
may require adjustment of the water pressure switch.
Adjustment of the pressure switch may be necessary
if any part of the filter system piping is 3 feet (1 m) or
more above the top of the heat pump jacket.
Do not adjust the pressure switch if the heat pump is
installed more than 5 feet (1.5 m) above or 10 feet
(3 m) below the pool surface. Consult your local
Zodiac dealer for recommendations.
®
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 (114 lpm) 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 flow through the heat pump. Start the
filter pump.
2. Set the heat pump control to call for heat. Set the
heat pump control to the POOL HEAT mode.
3. If the heat pump control displays "NO FLOW",
then the flow in the system may be below the
minimum flow of 30 gpm (114 lpm) needed for
the safe operation of the heat pump. Investigate
and correct any flow problems before adjusting the
Installation and Operation Manual
ENGLISH
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 confirming the flow rate is at a minimum
of 30 gpm (114 lpm), slowly rotate the thumb
wheel on the water pressure switch in a
counterclockwise direction until the "NO 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 filter
pump. The heat pump should turn off immediately.
7. If the heat pump continues to operate when the
filter pump is off, turn the thumb wheel on the
water pressure switch in a clockwise direction
until "NO 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 filter pump and checking
the control display and operation of the heater
between each flow change.
9. If the water pressure switch cannot be adjusted
to accommodate the conditions listed above,
an external flow switch must be added to the
plumbing system to ensure that the heat pump will
not operate without the proper flow 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 3.
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.
Figure 15. Winterizing the JE Heat Pump
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