Instructions / Assembly

IMPORTANT INSTALLATION 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.