Rheem Solar Hiline 52D180 Owner's Manual And Installation Instructions page 14

WATER SUPPLIES
-1.0
very corrosive
SUMMARY OF WATER CHEMISTRY ADVICE AFFECTING WARRANTY
The water heater, solar collectors and their components are not suitable for certain water chemistries. Those
chemistries are listed below. If the water heater is connected at any time to a water supply with the following
water chemistry, the Rheem warranty will not cover any resultant faults on the components listed below:
Water Chemistry
Total Dissolved Solids (TDS) > 2500 mg/L
Total Dissolved Solids (TDS) not suitable for anode type
Saturation Index (SI) < -1.0
Saturation Index (SI) > +0.4
(if an expansion control valve is not fitted)
Saturation Index (SI) > +0.8
SATURATION INDEX (SI)
SOLAR WATER HEATERS WITH ELECTRIC HEATING UNIT
WITHIN WARRANTY
SPECIFICATION
SATURATION INDEX
(calculated @ 80°C water temperature)
corrosive
0 +0.4
scaling very scaling
Component
water heater cylinder
water heater cylinder
solar collector
copper sheathed heating unit
water heater cylinder
temperature pressure relief valve
solar collector
standard watts density heating unit
14
+0.8