B. PLUMBING HOOK-UP
1. The unit is supplied with 3/4” NPT fittings molded into the heating
chamber. DO NOT USE PIPE DOPE OR PVC PRIMER OR GLUE ON THE
FITTINGS. DO NOT USE A TORCH ON ANY FITTING CONNECTED TO THE
HEATER. Use only TEFLON TAPE on the threads ensuring that no tape or
debris enters the heater.
2. If an adapter is required to reduce fitting size, use the enclosed adapter
with O- ring. No additional sealants or teflon tape is required. For other
adapters, be sure to use 3/4 NPT fittings and seal with TEFLON TAPE
ONLY. Connect plumbing to the adapters with teflon tape.
3. 3. Flex-pipe is recommended for ease of installaIon and service. Where
fixed pipe is used, a plumbing union is recommended for ease of service.
4. Always use two wrenches to tighten plumbing fittings to the heater to
avoid stress to the fittings and heating chamber.
5. Install ball valves on the inlet and outlet pipes to allow isolation of the
heater for service. Be sure both valves are open prior to activating the
heater.
6. Recommended operating pressure is 60 to 80 PSI. For installations with
higher pressure a PRV is required. For installations above the ceiling or
attic, a bleed air separator is recommended. Where water hammer exists,
a properly sized arrestor should be installed.
7. Run water through the unit for a few minutes until all visible air is purged
from the lines and unit and the flow is continuous without spitting air.
NOTE: ALL PLUMBING MUST BE COMPLETED BEFORE STARTING ELECTRICAL HOOKUP
TEST ALL CONNECTIONS FOR LEAKS BEFORE CONNECTING ELECTRICITY
C. COMMISSIONING THE UNIT
1. Open all ball valves and turn on water outlets.
2. Activate power at breaker.
3. Cycle the water on and off and verify unit operation.
4. Verify temperature and adjust as necessary.
5. If desired temperature is not reached, verify flow and sizing
information to ensure adequately sized unit has been installed.
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