26
Water Treatment
Water Treatment System
City Water Supply
Pressure
Relief
Valve
Hot Water to Fixtures
Shutoff Valve
Drain
Cold to Water
Heater
Optional Sediment
Filter
Water Treatment Device
Shutoff Valve
Electrolux
Condensing
Tankless Gas
Water Heater
Type of Water
Hardness
Level
Treatment
Device
Flush
Frequency*
Type of Water
Hardness
Level
Treatment
Device
Flush
Frequency*
Soft
0-1 gpg
1-3 gpg
(0-17 mg/L)
None
None
None
None
None
None
Slightly Hard
(17-51 mg/L)
None
None
Moderately
Hard
Hard
3-7 gpg
(51-120 mg/L)
Once a Year**
Once a Year
Twice a
Year
Once a Year**
7-10 gpg
(120-171 mg/L)
Very Hard
10-14 gpg
(171-239 mg/L)
Water Softener
Treatment
Required
Extremely
Hard
Soft
Slightly Hard
Moderately
Hard
Hard
Very Hard
Extremely
Hard
> 14 gpg
(> 239 mg/L)
0-1 gpg
1-3 gpg
(0-17 mg/L)
(17-51 mg/L)
3-7 gpg
(51-120 mg/L)
7-10 gpg
(120-171 mg/L)
10-14 gpg
(171-239 mg/L)
> 14 gpg
(> 239 mg/L)
Treatment
Required
Treatment
Required
Treatment
Required
* Install Isolation Valves to allow for flushing.
** Flushing is required if a water treatment device is not installed.
Scale Inhibitor
Water Softener
Scale Inhibitor
Water Softener
Scale Inhibitor
Water Softener
Scale Inhibitor
**
**
* Install Isolation Valves to allow for flushing.
** Flushing is required if a water treatment device is not installed.
Residential Use Treatment Guidelines
Commercial Use Treatment Guidelines
Water Softener
Scale Inhibitor
Water Softener
Scale Inhibitor
Water Softener
Scale Inhibitor
Water Softener
Scale Inhibitor
If this water heater will be installed in an application where the supply water is hard, the water must be
treated with a water softener or scale inhibitor. Refer to the below tables for suggested treatment and
maintenance measures to be taken based on the water hardness level. Damage to the water heater
as a result of water in excess of 12 gpg (200 mg/L) of hardness is not covered by the Electrolux Home
Products, Inc. Warranty.
/PUF 8BUFSTPGUFOFSTNBZCFSFHVMBUFECZUIFMPDBMXBUFSKVSJTEJDUJPODPOTVMUXJUIUIFNBOVGBDUVSFS
for code, sizing, and installation guidelines; the below diagram is for reference only.
