Installing The Water Heater; Choosing An Installation Location; About Water Quality - Navien NPE-180A2 Installation Manual

3. Installing the Water Heater

3.1 Choosing an Installation
Location
When choosing an installation location, you
must ensure that the location provides adequate
clearance for the water heater, adequate venting
and drainage options, and sufficient access to gas,
water, and electrical supplies. Carefully consider
the following factors when choosing an installation
location:
CAUTION
Review all of the installation information in this
manual before starting installation. Consider
all the requirements for venting, piping,
condensate removal, and wiring.
WARNING
Do not install this water heater in a recreational
vehicle, trailer, boat or other vehicular type unit
as it will result in a Carbon Monoxide Poisoning
Hazard.

About Water Quality

Proper maintenance of the water heater is required
when water quality does not meet EPA standards.
Damage caused by poor water quality is not
covered under warranty. The following table shows
the maximum contaminant levels allowed, based
on the EPA National Secondary Drinking Water
Regulations (40 CFR Part 143.3). If you suspect that
your water is contaminated in any way, discontinue
use of the water heater and contact an authorized
technician or licensed professional.
Contaminant Maximum Allowable Level
Total Hardness Up to 200 mg/l (12 grains/gallon)
Aluminum 0.05 to 0.2 mg/l
Chloride Up to 250 mg/l
Copper Up to 1.0 mg/l
Iron Up to 0.3 mg/l
Manganese Up to 0.05 mg/l
pH 6.5 to 8.5
Sulfate Up to 250 mg/l
Total
Dissolved Up to 500 mg/l
Solids (TDS)
Zinc Up to 5 mg/l
Chlorine Up to 4 mg/l
If your local water is hard, please review the
following recommended treatment and flushing
guidelines.
Hardness Level
0-4 grains/gal
Soft
(0-60 mg/L)
Moderately 4-7 grains/gal
Hard (61-120 mg/L)
7-9 grains/gal
Hard
(121-160 mg/L)
9-12 grains/gal
Very Hard
(161-200 mg/L)
Extremely >12 grains/gal
Hard (200 mg/L)
* Flushing is recommended if a treatment device is
not installed. This procedure should be performed
using white vinegar or solutions that are specifically
formulated for use on tankless water heaters.
** Check local codes for any restrictions on use of water
softeners.
Treatment Flush
Method Frequency*
None None
Water
Once/Year
Softener**
or Navien
PeakFlow is
Recommended
Water
Softener**
Residential:
or Navien
Once/Year
PeakFlow
is HIGHLY
Commercial:
Recommended
Twice/Year
Water
Softener**
or Navien
PeakFlow is
Required
Installing the Water Heater 15