Legacy Whirlpool LW 524 Owner's Manual page 51

Spa Controls
Initial Start-Up
PREPARATION AND FILLING
Fill the spa to its correct operating level. Be sure to open all valves and jets in the plumbing system
before filling to allow as much air as possible to escape from the plumbing and the control system
during the filling process. It is always best practice to fill the spa at the filter area.
After turning the power on at the main power panel, the top-side control panel display will go
through specific sequences. These sequences are normal and display a variety of information
regarding the configuration of the hot tub control.
PRIMING MODE
This mode will last for 4-5 minutes or you can manually exit the priming mode after the pump(s)
have primed, by pressing a WARM or COOL button (or TEMP).
Regardless of whether the priming mode ends automatically or you manually exit the priming
mode, the system will automatically return to normal heating and filtering at the end of the
priming mode. During the priming mode, the normal system's programming and heating is dis-
abled to allow the priming process to be completed by the user without the possibility of turning
on the heater under low-flow or no-flow conditions. Nothing comes on automatically, but the
pump(s) can be energized by pushing the JETS button. If the spa has a 24 hour Circulation Pump,
it can be activated by pressing the LIGHT button during Priming Mode.
PRIMING THE PUMPS
As soon as the above display appears on the panel, push the JETS button once to start Pump 1
in low-speed and then again to switch to high-speed. Also, push the Pump 2 or AUX button, if you
have a 2nd pump, to turn it on. The pumps will now be running in high-speed to facilitate prim-
ing. If the pumps have not primed after 2 minutes, and water is not flowing from the jets
in the spa, do not allow the pumps to continue to run. Turn off the pumps and repeat the
process. NOTE: Turning the power off and back on again will initiate a new pump priming session.
Sometimes momentarily turning the pump off and on will help it to prime. Do not do this more
than 5 times. If the pump(s) will not prime, shut off the power to the spa and follow the
instructions shown for removing air locks in the installation instructions section of this manual.
IMPORTANT: A pump should not be allowed to run without priming for more than 2 minutes.
Under NO circumstances should a pump be allowed to run without priming beyond the end of the
4-5 minute priming mode. Doing so may cause damage to the pump and heater due to lack of
water flow necessary for proper heating and to push out excessive air within the system after fill-
ing.
EXITING PRIMING MODE
You can manually exit Priming Mode by pressing a Temperature button, WARM (Up) or COOL
(Down). Note that if you do not manually exit the priming mode as described above, the prim-
ing mode will be automatically terminated after 4-5 minutes. Be sure that the pump(s) have been
primed by this time.
Once the system has exited Priming Mode, the top-side control panel will momentarily display the
set temperature but the display will not show the temperature yet, as shown below. This is because
the system requires approximately 1 minute of water flowing through the heater to determine the
water temperature and display it.
DO NOT DIVE. DO NOT DIVE. 101 49