Installation guide

50 | Rinnai Continuous Flow Water Heating Specication Guide 02-13
Water quality
Water quality outside the limits, as set down below, will void this warranty. Water quality tests must be carried out
at the customer’s own cost. Rinnai will reimburse any reasonable test costs where water quality is within the limits
tabled.
Water quality and impurity limits
TDS (Total
Dissolved
Solids)
Total
Hardness
CaCO
3
Alkalinity
(as CaCO
3
)
Dissolved
(free) CO
2
pH Chlorides Magnesium Sodium Iron Langelier
Index
Up to 600
mg/L or
ppm
Up to 200
mg/L or
ppm
Up to 200
mg/L or
ppm
Up to 25
mg/L or
ppm
6.5-8.5 Up to 300
mg/L or
ppm
Up to 10
mg/L or ppm
Up to 150
mg/L or
ppm
Up to 1
mg/L or
ppm
Between
-1.0-0.8
Most metropolitan water supplies fall within these limits. If you are unsure about water quality, please contact
Rinnai and we will provide you with details of an authorised agency able to test your water for compliance to
Rinnai standards. If sludge or foreign matter is present in the water supply, a suitable filter should be incorporated
in the water supply. Some examples of water quality issues where water may need to be treated:
- Hard water (areas including Wanganui)
- Aggressive water (areas including Christchurch)
- Both hard and aggressive water (some bore water)