Technical data
24
Onzen Technical Guide
1.15 A S O M S
e following table outlines the typical water maintenance program required for an Arctic Spa ed with Onzen.
To help ensure chemicals dissolve appropriately it is good practice to rst mix/dissolve the chemical in an uncontaminated container of hot water before carefully
adding to the spa water.
Item Frequency Maintenance Task Target Range Maintenance Action to Adjust/Correct
TA Weekly
Check the Total Alkalinity to ensure it is in
the target range.
80 – 100 ppm
Low TA - Can be raised by adding Arctic Pure, Perfect Balance to spa water.
High TA - Can be lowered by adding Arctic Pure, Adjust Down to spa water.
pH Weekly
Check the Potential Hydrogen to ensure it is
in the target range.
7.2 – 7.6 ppm
Salt systems naturally drive pH levels to increase, strive to achieve a Low pH level 7.2. pH
must not exceed 7.6.
Low pH - Can be raised by adding Arctic Pure, Adjust Up to the spa water.
High pH - Can be lowered by adding Arctic Pure, Adjust Down to spa water.
FCL
Weekly
(& before each
use)
Check the Free Chlorine Level to ensure it is
in the target range.
Adjust the chlorine levels using “Boost”
granular chlorine, aer heavy use or if the
Onzen Output is too low.
1 – 3 ppm
Low FCL - Can be raised by adding Arctic Pure, Boost and or turning Onzen
Cycle Duration (Chlorine Production On) Level up.
High FCL - Can be lowered by:
• Natural cause over a few days.
• Turning Onzen Cycle Duration (Chlorine Production On) down.
• Adding Arctic Pure, X-it.
e above is dependent on FCL level, spa usage and bather load.
ORP Refer FCL Refer FCL Maintenance Task 600–1000 mV Refer FCL Maintenance Action to Adjust/Correct.
CH Monthly
Check Calcium Hardness level to ensure it is
in the target range. Salt systems perform best
with Low Calcium Hardness levels.
50-150 ppm
High CH - lower with a stain & scale controller such as Arctic Pure, Best Defence, to help
hold Calcium in suspension.
Sodium
Chloride
Monthly
Check the Sodium Chloride Level to ensure
it is in the target range.
Version 8
1500-1800 ppm
Once Sodium Chloride reading is in the ideal range salt concentration will only
change if water is splashed or drained out. Do not add salt unless this test
conrms the level is below the chemical target range.
High Sodium Chloride - add water.
Low Sodium Chloride - add salt.
Onzen
Output
As required
If spa use changes signicantly, adjust the
output level of Onzen Chlorine Production
( “On” )
2 - 4 Hours per
day suggested
Go into low level seings and adjust Onzen Cycle Duration (Chlorine Production On)
accordingly.
Adjust to suit spa usage and bather load.
Filter Every 3 Months Change the lter N/A Change the lter in accordance with Owners Manual instructions
Water Every 6 Months Change the water N/A Change the water in accordance with Owners Manual instructions.
Note: It is also good practice to take a water sample on a regular basis and have the water independently tested by your local spa/pool store.