Pressure relief Valve
HOT COLD GAS
WARNING: Be careful not to reverse the hot
outlet and cold supply line connections to the
MOBIUS Water Heater. This will cause your
heater to operate dangerously and void
warranty. Make sure the hot and cold lines are
connected properly. Refer to the FOR YOUR
SAFETY section at the front of this manual.
PRESSURE RELIEF VALVE
The Mobius has a built Hi-Limit (high-
temperature) shut off switch and no store hot
water therefore only a “pressure only” relief
valve is required.
This unit does not come with an approved
pressure relief valve. An approved pressure
relief valve must be installed on the hot water
outlet. A “Tee” fitting should be used to attach
the pressure relief valve. Then place the
pressure relief valve 6” inches from water flow
as shown in picture to prevent premature wear
of relief valve. The pressure relief valve must
meet and followed local code.
The discharge capacity must be at least
235,000 Btu/hr. The discharge piping for the
pressure relief valve must be directed so that
the hot water cannot splash on anyone or
nearby equipment. Attach the run-off tube to
the pressure relief valve, and run the end of
the tube to within 6" from the floor. Do not
install any reducing couplings, valves or any
other type of restriction in this line. This run-off
tube must be installed to allow free and
complete drainage of both the valve and the
run-off tube.
If the pressure relief valve on the appliance
discharges periodically, this may be due to the
thermal expansion in a closed water supply
system or defective pressure relief valve,
replace a new pressure relief valve. Contact
the water supplier or local plumbing inspector
on how to correct this situation.
The pressure relief valve must be manually
operated once a year to check for correct
operation.
Should overheating occur or gas supply fail to
shut off, turn off the manual gas control valve
to the appliance.
Pressure Valve
CAUTION: Only the pipes within the heater are
protected on the MOBIUS Water Heater. Any
hot or cold water pipes located outside of the
unit will not be protected. Properly protect and
insulate these pipes from freezing.
Electrical Connections
WARNING: The heater must be electrically
grounded. Follow the requirements of the local
authority having jurisdiction. In the absence of
such requirements, follow the latest edition of
the National Electrical Code ANSI/NFPA 70 in
the U.S., or the latest edition of CSA C22.1
Canadian Electrical Code, Part 1, in Canada.
Do not rely on the gas or water piping to
ground the metal parts of the water heater.
Plastic pipe or dielectric unions may isolate the
water heater electrically. Service and
maintenance personnel who work on or around
the water heater may be standing on wet floors,
and could be electrocuted by an un-grounded
water heater.
CAUTION: Label all wires prior to
disconnection when servicing controls. Wiring
error can cause improper and dangerous
operation. Verify proper operation after
servicing.
The MOBIUS water heater requires an
electrical power supply from 120 VAC 60 Hz
circuit and be properly grounded.
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