Installation Instructions

8
EN
Failure of electric elements due to lime scale build-up on the heating surface, low pH, or other imbalance IS NOT
covered by the warranty.
Water pH between 6.5 and 8.5
• pH levels below 6.5 can cause an increase in the rate of corrosion. pH of 8.5 or higher can potentially cause
lime scale build-up
• Maintain water pH between 6.5 and 8.5. Check with litmus paper or have it chemically analyzed by a local
water treatment company.
• If the pH is not between 6.5 and 8.5, consult a local water treatment company for solutions.
Hardness between 4 grains (70 mg/L) and 20 grains (350mg/L):
• The appliance must not be supplied with water of hardness less than 4 grains (70 mg/L), nor with especially
hard water (greater than 20 grains (350mg/L)); we recommend installing a water softener, properly calibrated
and controlled - do not allow the residual hardness to fall below 9 grains (150mg/L).
Chloride concentration less than 100 ppm (mg/L)
• Do not  ll appliance or operate with water containing chlorides in excess of 100 ppm (mg/L).
• Using chlorinated fresh water should be acceptable as levels are typically less than 5 ppm (mg/L).
• Do not connect the appliance to directly heat swimming pool or spa water.
Total Dissolved Solids (TDS) less than 500 ppm (mg/L)
• Total dissolved solids are minerals, salts, metals, and charged particles that are dissolved in water.
• The greater the amounts of TDS present, the higher the corrosion potential due to increased conductivity
in the water.
• If using softened water to  ll the appliance, it is still possible to have high TDS. This water can be corrosive.
Consult local water treatment companies for other treatment solutions to reduce this a ect.
Water conductivity not higher than 1200 μS / cm
*NOTE: To promote appliance service life, it is strongly recommended to follow the maintenance procedures in
this manual.
Figure 2 - Installation Detail
VALVE
CHECK VALVE
EXPANSION TANK
HOT WATER OUTLET
CATCH PAN
UNION
COLD WATER INLET
TEMP/PRESSURE
SHUT-OFF VALVE
DRAIN
RELIEF VALVE
MIXING VALVE
DRAIN
BALL VALVE
AUTOMATIC WATER
WATER LEAK
DETECTION
SENSOR
LP-665-D
07/31/18
NOTES:
1. Minimum pipe size should
match connection size. Upsize
pipe accordingly if greater  ow
is required.
2. A thermal expansion tank
suitable for potable water must
be sized and installed within
this piping system between
the back ow preventer and the
cold water inlet.
3. All circulators should have an
integral  ow check.
4. Drains and check valve
between unit and storage tank
will assist in purging air from
system.
5. These drawings are meant
to demonstrate system piping
only. The installer is responsible
for all equipment and detailing
required by local codes. In
Massachusetts, you must install
a vacuum relief valve per 248
CMR.
6. Mixing valve application is
optional, but recommended to
help prevent scalding. See Part
3 for more information.
7. It is highly recommended by the manufacturer to install water leak detection devices and automatic shuto valves in
any water heater installation where a leakage of water could result in property damages.