Jacuzzi J-300 Series, Installation, Use & Maintenance Manual

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In extreme bitter cold weather, less than 0°C (32°F), program 
the primary filtration cycle to run for 24 hours to prevent 
freezing

„

 If you do not intend to use your spa, or if there is a prolonged 

power outage during periods of severe freezing temperatures, 

it is important that all water be removed from the spa and 
equipment to protect against damage from freezing.

Expert winterization of your spa is highly recommended, 
contact your authorized Jacuzzi dealer.

 In emergency situa-

tions, damage can be minimized by taking the following steps:

1. 

Turn off power to the spa.

2.

 Follow the directions for draining the spa.

3.

 Turn the massage/diverter selector(s) into the middle combo 

position to allow the water in the plumbing lines to drain.

4. 

Turn the waterfall valve(s) to the open position to allow the 

water in the plumbing lines to drain.

5.

 Open all the air controls and leave them open until you re-

sume use of the spa.

6.

 As soon as the water level falls below the seats (and once 

draining has finished), try to remove the water from the recesses 
in the seats and drainage point, for example using a liquid aspi-
rator. Do the same to suck the water from the bottom of the hot 
tub once draining has finished.

7. 

When the water level ceases to drop, use whatever means 

available to remove any remaining water from the foot well, such 
as a wet/dry vacuum.

8.

 Remove the synthetic cabinet panel under the control panel 

and locate the drain plugs on the front of the pump(s). Remove 
plugs to allow water to drain out of pumps and heater.

Note: 

Use a wet/dry vacuum or other means to keep this from 

flooding the equipment compartment. Replace the drain plugs.

9.

 Loosen the hose clamp on the circulation pump intake behind 

the control box and pull the hose off (twist hose back and forth 
while pulling outward). Tip hose down and allow to drain, then 
reinstall hose and clamp.

10.

 Loosen hose clamp at bottom of CLEAR

RAY® 

system and 

pull hose off of CLEAR

RAY®

 fitting (twist the hose back and forth 

while pulling downward). Tip hose down and allow to drain. Then 
reinstall hose and clamp. Remove the cover of the CLEAR

RAY®

system to access the UV bulb and quartz tube. Remove and store 
the UV bulb in a safe location. Remove and dry off the quartz 
tube then reinstall it. Depending on the length of time, consider 
replacing the UV bulb when you resume use of your hot tub.

11. 

Reinstall synthetic cabinet side panel and cover spa so that 

no casual moisture can enter into it.

Restarting Your Spa in Cold Weather

If you want to start up your spa after it has sat empty for a time 
in freezing temperatures, be aware that the water remaining in 
certain sections of the piping may still be frozen. This situation 
will block water flow preventing the spa from operating properly 
and possibly damaging the equipment. 

We recommend you consult your authorized Jacuzzi dealer for guid-
ance before attempting to restart your spa under these conditions.

Contact your Jacuzzi retailer if you have any questions about 
using your hot tub in winter or preparing it for the winter.

Maintaining water quality

To reduce the risk of contracting water-related pathologies or res-
piratory diseases, the water quality must be kept within the specified 
limits. This requires constant monitoring as the chemical aspect in-
volves a combination of different factors that need to be balanced. 
Delaying water maintenance work leads to poor hygiene that is po-
tentially damaging to your health, and also has an impact on the 
life of the hot tub.

For a specific guide to maintaining water quality, consult the Jacuz-
zi® system guide on water treatment and the relevant catalogue, or 
contact your authorised Jacuzzi retailer.

CLEARRAY™ Water Purification System

The CLEARRAY water purification system is an exclusive tech-
nology that takes advantage of natural ultraviolet radiation to 
eliminate bacteria, viruses and algae potentially present in the 
hot tub water. Ultraviolet light, also known as UV-C or germi-
cidal light, neutralises these organisms, also breaking down the 
DNA, so as to prevent reproduction. 
The CLEARRAY system, which is directly connected to your fil-
tration system, works as follows:
- the water coming from the pump, from the filter and from 
the heater is disinfected by ultraviolet light, after which it is 
introduced back into the spa.
The system is equipped with a power converter whose oper-
ation is signalled by two LEDs: the green one indicates that 
the device is powered, while the red one indicates that it is 
operating correctly.

WARNING!

DO NOT LOOK AT LIT BULB

SEVERE EYE DAMAGE

OR BLINDNESS CAN OCCUR

120 - 230V

IMPORTANT: After one year, the lamp must be replaced.

If the UV timer has been programmed correctly (please refer 
to the corresponding section), at the end of the allotted time 
shown on the display, a message will appear indicating that a 
new UV lamp needs to be installed and the timer reset.

UV lamp replacement and maintenance  

of the quartz tube

To access the Clearray® device, it is necessary to remove the 
front panel (or that of the audio system) and the right angle 
panel.

These operations should only be carried out by qualified 
installers. Please read the instructions carefully before 
carrying out any operations involving the opening of the 
Clearray® device.