1-25
INSTALLATION
TANKLESS WATER HEATER 199
1.7.1 Domestic Hot Water System
This Tankless Water Heater has a copper piping circuit for efficiently generating
Domestic Hot Water. When a faucet is opened to draw hot water, water flow is
detected with a flow sensor and the unit fires up to begin generating domestic hot
water.
The heat exchanger has copper water passageways encased in the aluminum
heat transfer block. The aluminum heat exchanger acts as a heat buffer,
eliminating the “cold water sandwich effect” when turning on and off the water
repeatedly.
While the Tankless Water Heater unit is less susceptible to lime scale build-up
than other units on the market, always consider water quality in the installation.
We strongly recommend treating hard water and adjusting the pH to 6.5 and
8.5. As a reference
Table 5
represents some of the drinking water guidelines
published by the US EPA. Consult a water treatment adviser in your area to
assess your local needs. Proper water treatment will aid in the longevity of the
unit and ensure maximum efficiencies.
When installing and maintaining the water heater, you must consider water
quality. Water conditions outside of the levels specified below may damage the
water heater.
DESCRIPTION
MAX
MIN
Water Pressure
150 psi
40 psi
Programmable water temperature
149°F (65°C)
105°F (40°C)
Minimum Flow Rate to Activate DHW Sensor
N/A
0.5 GPM
Acceptable pH range
8.5 pH
6.5 pH
Total Dissolved Solids
500 mg/L
Total Hardness
200 mg/L 11.68 gr/gal
Aluminum
0.05 to 0.2 mg/L
Chlorides
250 mg/L
Copper
1.0 mg/L
Iron
0.3 mg/L
Manganese
0.05 mg/L
Zinc
5 mg/L
Table 5: Recommended Water Quality Levels
WARNING
HOT WATER CAN SCALD!
Water Temperatures over 125°F
/ 52°C can cause severe burns
instantly or death from scalds.
Children, disabled, and elderly are
at highest risk of being scalded.
•
Never leave them unattended
in or near the shower, bathtub
or sink.
•
Never allow small children to
use a not water faucet or draw
their own bath.
TO AVOID INJURY:
•
Feel and adjust water
temperature before bathing or
showering.
•
Water drained from the system
drain valve may be extremely
hot.
•
Make sure all connections are
tight.
•
Direct water flow away from
any person.
NOTE
The limited warranty provided
with the water heater does not
cover defects, malfunctions
or failures resulting from
water conditions that are
not in accordance with the
specifications in the table 5.