14 |
Breaker must remain OFF until installation is complete.
PLUMBING INSTALLATION
Heatworks requires this product be installed by a licensed and qualified plumber in accordance
with all applicable national, state, provincial, and local plumbing codes.
INSTALLING TWO OR MORE MODEL 3 UNITS IN SERIES VERSUS PARALLEL
If considering installing two MODEL 3’s next to one another in a dwelling, we recommend
installing MODEL 3’s in series instead of in parallel. In our experience, it is difficult to balance flow
perfectly if installing MODEL 3’s in parallel.
SAND FILTER FOR WELL WATER
Heatworks recommends installing a sand filter on the water supply line when using a well water
supply or other water supply that may have sediment.
WATER PRESSURE REGULATOR
The MODEL 3 comes with a water pressure regulator. To reduce the risk of water pressure
fluctuations that can go unnoticed by the homeowner, Heatworks recommends installing this
pressure regulator on the COLD| INLET side of the MODEL 3. Ensure the plumber’s tape stays clear
of the first inlet thread to avoid tape entering the inlet. Place the included O-ring in the recessed
portion of the pressure regulator and thread the regulator into the union. If possible, lube the
o-ring before installation.
The regulator is factory preset to 50 psi (345 bar), 345 kPa. To adjust pressure setting, loosen the
lock nut and turn the adjusting bolt clockwise to increase pressure, counter clockwise to decrease
pressure.
Any time a reducing valve is adjusted, use a pressure gauge to verify correct the correct pressure
setting. Do not bottom out the adjusting screw on spring cage.
WATER CONNECTIONS
•
DO NOT install a check valve within 10 feet of the inlet.
•
DO NOT apply heat or solder to any connections or pipe if they are already connected to the
MODEL 3. Heat from soldering may damage the MODEL 3 and void the warranty.
•
ONLY use Teflon tape on pipe threads.
DO NOT use pipe dope.
•
The pressure relief valve must remain installed. Removal of or tampering with the pressure
relief valve will void the warranty. A suitable alternative temperature and pressure relief
valve may be required to meet installation codes in your area. If one is required, install
the temperature and pressure relief valve in accordance with local codes and check 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, Heatworks recommends using a
temperature and pressure valve for added safety.
NOTE: Installations in the Commonwealth of Massachusetts requires a pressure relief valve
installed on the COLD| INLET water side by a licensed plumber. Please check your local installation
codes for any special requirements.
