A.O. Smith TWI 35-200, Installation, User And Service Manual

Page: 38 / 92

Water composition
Hardness
(alkaline earth ions)
> 1.00 mmol/l:
- German hardness > 5.6° dH
- French hardness > 10.0° fH
- English hardness > 7.0° eH
- CaCO
3
> 100 mg/l
Conductivity > 125 µS/cm
Acidity (pH value) 7.0 < pH value < 9.5
Note
If the water specifications differ from the specifications in the table, the tank protection
cannot be guaranteed, refer to Warranty (on page 3).
8.2.4 Working clearances
Make sure that there is sufficient clearance to access the water heater:
• 100 cm in front of the water heater (AA).
• 50 cm at the left and right side of the water heater (BB).
Fig. Working clearances
AA
BB
IMD-1350 R0
8.3 Installation diagram
Note
This manual only discusses unvented installations.
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38 Installation, Maintenance and Service part