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IMPORTANT NOTES:
1.
This unit should not require soldering any pipes for installation. Heat from soldering may damage the
flow sensor in the unit.
2.
This unit is equipped with both computer-controlled and electro-mechanical auto resetting thermostat
switches for high-limited temperature protection. Since this product does not use a storage tank, the
use of a temperature pressure relief valve (T&P) is not required for most installations. UL Standard 499
does NOT require that a pressure relief valve be used. However, a T&P valve may be required to meet
installation codes in your area. If one is required, install the pressure relief valve in accordance with
local codes and ensure that it operates correctly and that air is purged from the valve prior to installing
the water heater. When connecting to Flex or High Temperature CPVC pipe, we recommend that a T&P
valve be used for added safety.
Please note: Installations in the Commonwealth of Massachusetts and State of Kentucky require a
pressure relief valve. Please check your local installation codes for any special requirements.
3.
The maximum operating water pressure is 150 PSI. If the water pressure is higher, a pressure reducing
valve must be installed on the main incoming water supply line prior to installing the unit.
4.
When connecting the inlet water pipe to the unit, make sure to use a wrench to hold the unit’s
connection, and another wrench to tighten, so the flow sensor on the unit is not loosened or damaged.
Serious internal damage to the water heater can occur if the inlet or outlet connections are over
tightened or if solder connections were made.
5.
We recommend that a manual shut-off valve (ball valve) be installed on the inlet and outlet of the water
heater so there is a convenient shut-off point available in the event that future maintenance or servicing
is required. Before connecting pipes to the water heater, it is extremely important to flush the lines to
eliminate all plumbing paste or residue in the lines caused by any brazing or soldering.
We recommend that all the water pipes or hoses within 3 feet of the inlet and outlet connections be rated for
high temperature applications with a 150°F minimum.
