Navien NHW700, Руководство по установке

Страница: 15 / 83

14 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:
WARNING
Review the entire installation information in this
manual before starting installation. Consider all
the requirements for venting, piping, and wiring.
Note
If the water heater is installed in
Massachusetts, see “6.8 Requirements
for the State of Massachusetts“ on page
78.
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
Solids (TDS)
Up to 500 mg/l
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
Treatment
Method
Flush
Frequency*
Soft
0-4 grains/gal
(0-60 mg/L)
None None
Moderately
Hard 4-7 grains/gal
(61-120 mg/L)
Water Softener**
or Navien
PeakFlow is
Recommended
Once/Year
Hard
7-9 grains/gal
(121-160 mg/L)
Residential:
Once/Year
Very Hard
9-12 grains/gal
(161-200 mg/L)
Water Softener**
or Navien
PeakFlow
is HIGHLY
Recommended
Extremely
Hard >12 grains/gal
(200 mg/L)
Water Softener**
or Navien
PeakFlow is
Required
* 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. See Water
Heater Flush Procedures.
**Check local codes for any restrictions on use of water
softeners
Water Heater Flushing Procedures
NOTICE
Flushing the Heat Exchanger can be a difficult
procedure. Read the following instructions
carefully before attempting this procedure. If
you are uncertain about any of the steps in the
procedure, contact an authorized technician
or licensed professional. Keep in mind that
improper maintenance can void your warranty.
Refer to “Dimensions” on page 11 for details about
part locations.
Before flushing the Heat Exchanger, gather the
following items:
●
A bucket that is 5 gallons or larger
●
Cleaning solution diluted with water
●
3 hoses
●
A water circulation pump
3. Installing the Water Heater