6
EN
2. Choose a location for the water heater as centralized to the piping and electrical system as possible. Also, locate
the water heater and domestic water piping where it will not be exposed to freezing temperatures. All piping
should be insulated. Additionally, place the water heater so that the drain, controls, and inlets/outlets are easily
accessible.
NOTE: To save on heating costs and improve energy efficiency keep the distance between the water heater and
fixtures to a minimum to reduce heat loss from excess piping and keep friction loss at a minimum. Ensure all
water heater piping is properly insulated to minimize heat loss.
NOTE: If you do not provide the minimum recommended service clearances it might not be possible to service
the water heater without removing it from the space.
NOTE: In the State of California, the water heater must be braced, anchored, or strapped to avoid moving during
an earthquake. Contact local utilities for code requirements in your area. Visit http://www.dsa.dgs.ca.gov or call
1-916-445-8100 and request instructions.
3. Check area around water heater. Remove any combustible materials, gasoline, and other flammable liquids.
This water heater must not be located near flammable liquids such as gasoline, butane, liquefied propane,
adhesives, solvents, paint thinners, etc., as the controls of this water heater could ignite these vapors and cause
an explosion resulting in property damage, severe personal injury, or death.
This water heater must be installed upright in the vertical position as described in this manual. DO NOT attempt
to install this water heater in any other orientation. Doing so will result in improper water heater operation and
property damage, and could result in serious personal injury or death.
4. If the water heater is to replace an existing water heater, check for and correct any existing system problems
such as:
• System leaks
• Location that could cause the system and water heater to freeze and leak
5. This water heater must be installed vertical on a level surface.
B. Water Chemistry Requirements
Chemical imbalance of the water supply may affect efficiency and cause severe damage to the appliance and
associated equipment. Water quality must be professionally analyzed to determine whether it is necessary
to treat the water. Various solutions are available to adjust water quality. Adverse water quality will affect the
reliability of the system. In addition, operating temperatures above 135
o
F will accelerate the build-up of lime
scale and possibly shorten appliance service life. Failure of an appliance due to lime scale build-up, low pH, or
other chemical imbalance IS NOT covered by the warranty.
The water must be potable, free of corrosive chemicals, sand, dirt, and other contaminates, and meet the
manufacturer’s requirements. It is up to the installer to ensure the water does not contain corrosive chemicals or
elements that can damage the heat exchanger. Potable water is defined as drinkable water supplied from utility
or well water in compliance with EPA secondary maximum contaminant levels (40 CFR Part 143.3). If the water
contains contaminants higher than outlined by the EPA and the manufacturer, water treatment is recommended
and additional, more frequent maintenance may be required. If you suspect that your water is contaminated in
any way, discontinue use of the appliance and contact an authorized technician or licensed professional.
Water Chemistry Requirements
pH
6.5 - 8.5
Chloride
Less than 250 mg/L
Total Dissolved Solids (TDS)
Less than 500 mg/L
Copper
Less than 1.0 mg/L
Free CO2
Iron
Less than 0.3 mg/L
Total Hardness
Less than 200 mg/L
Manganese
Less than 0.05 mg/L
Aluminum
Less than 0.2 mg/L
Zinc
Less than 5 mg/L
*NOTE: To promote appliance service life, it is strongly recommended to follow the maintenance procedures in
this manual.
Table 2 - Water Chemistry Requirements