Page 11 of 17
| INSTALLATION MANUAL for CFEWH SERIES 6-13 | V01 - 12 / 02 / 2021
PLUMBING INSTALLATION
FOR LICENSED PLUMBERS ONLY
The unit is a closed outlet water heater and is intended to operate at the pressure
of the water mains, where the flow of water is controlled by one or more faucets/
valves in the outlet line.
The unit can be installed into any type of commercial or residential construction
as per the current plumbing standards.
However, it is mandatory for a water pressure limiting valve and a shutoff
valve to be connected in series with the unit’s
6
Cold Water Inlet Connection.
›
The unit maximum rated operating line pressure is 0.8 MPa / 8 bar / 116 PSI.
›
The unit minimum operating pressure is atmospheric pressure.
›
The installation of a pressure limiting valve – a mandatory requirement –
ensures that excess water pressure applied, as result of water hammer and/
or other circumstances, does not stress the appliance unduly.
›
The inlet water pressure limiting valve must be rated at
0.5 MPa / 5.0 bar / 72.5 psi.
›
The shutoff valve installed must not be a non-return type valve.
›
Inlet and outlet piping must be maximum 3/4�, minimum 20� pipe length.
›
If the water heater is supplying a dishwasher/washing machine, a water
hammer arrestor must be installed on the outlet side of the water heater.
HOT
WATER
OUT
COLD
WATER
IN
PRESSURE
LIMITING
VALVE
5 bar/500 kpa
SHUTOFF
VALVE
INLET
OUTLET
COLD
WATER
IN
PRESSURE
LIMITING
VALVE
5 bar/500 kpa
SHUTOFF
VALVE
MUST NOT BE
A NON-RETURN
TYPE VALVE
INLET
HOT
WATER
OUT
OUTLET
LESS THAN
250mm
SINGLE CFEWH SERIES 6-13
PLUMBING CONNECTION
TANDEM CFEWH SERIES 6-13
x
2
PLUMBING CONNECTION
IMPORTANT:
MicroHeat, nor its Distributors,
will be liable for any damages
through failure to comply with
the installation and operating
instructions outlined in this
manual – specifically in this
instance where the specified
water pressure limiting valve
and shutoff valve type, as
indicated, must be installed
with this unit.
PAGE 1 of 1
1.
Switch OFF the circuit breaker and isolation switch supplying the electric
mains power to the unit for plumbing installation.
2.
Connect the water pressure limiting valve (5.0 bar / 72.5 psi / 500 kpa) and
shutoff valve.
3.
Connect the water supply via the shutoff valve and pressure limiting valve
to the unit to the
6
Inlet Water Connection. The
6
Inlet and
7
Outlet
Water Connections are both ¾� NPT. NOTE: Flush the cold water line before
connecting to the unit.
4.
Connect the hot water from the
7
Outlet Water Connection.
5.
Run water through the unit without power to ensure there are no leaks.
6.
Switch ON the circuit breaker and isolation switch supplying the electric
mains power to the unit for plumbing installation.
If the LED is slow flashing
GREEN
, the unit is in standby mode and is ready for use.
Turning hot water on will initiate the heating process and hot water should exit from
of the point-of-use water outlet. The LED will illuminate as fast flashing
GREEN
.
See Page 15 for full list of light indicator signals.
STEPS FOR INSTALLATION
END OF SECTION
