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AQC TANKLESS ELECTRIC WATER HEATERS |
5
INSTALLATION
WATER CONNECTIONS
5. Water connections
1. All plumbing work must comply with national and appli-
cable state and local plumbing codes.
2. A pressure reducing valve must be installed if the cold water
supply pressure exceeds 150 PSI (10 bar).
3. Make certain that the cold water supply line has been
flushed to remove any scale and dirt.
4. Install isolating valve in cold water line as shown in illustra-
tion. This allows the unit to be isolated for maintenance
purposes.
5. Cold water connection (inlet) is on the right side of the unit,
hot water connection (outlet) is on the left side of unit.
Note
EXCESSIVE HEAT FROM SOLDERING ON COPPER PIPES
NEAR THE AQC MAY CAUSE DAMAGE.
6. Tankless water heaters such as the AQC are not required to
be equipped with a Pressure and Temperature Relief Valve
(PTRV). If the local inspector will not pass the installation
without a PTRV, it should be installed on the hot water out-
let side of unit.
7. In case you are connecting to 1/2“ water pipe, solder 1/2“
NPT tapered female adapter by copper on ends of cold and
hot water lines. In case you are connecting to 3/8“ water
pipe, use a 1/2“ female pipe thread by 3/8“ compression
adapter. Braided flexible connectors will work as well. Con-
nect cold and hot water lines to the unit.
8. When all plumbing work is completed, check for leaks and
take corrective action before proceeding.
6. Electrical connection
DANGER Electrocution
BEFORE BEGINNING ANY WORK ON THE ELECTRIC IN-
STALLATION, BE SURE THAT MAIN BREAKER PANEL
SWITCH IS „OFF“ TO AVOID ANY DANGER OF ELECTRIC
SHOCK. ALL MOUNTING AND PLUMBING MUST BE
COMPLETED BEFORE PROCEEDING WITH ELECTRICAL
HOOK-UP. WHERE REQUIRED BY LOCAL, STATE OR
NATIONAL ELECTRICAL CODES THE CIRCUIT SHOULD
BE EQUIPPED WITH A „GROUND FAULT INTERRUPTER“.
1. All electrical work must comply with national and applicable
state and local electrical codes.
2. The AQC should be connected to a properly grounded dedi-
cated branch circuit of proper voltage rating. In installa tions
with several AQC units, each unit requires an independent
circuit. Please refer to the technical data table for the cor-
rect wire and circuit breaker size.
3. The wire must be fed through the rubber seal located be-
tween the hot and cold water connections. Then feed wires
through strain relief clamp and tighten clamp down on
wire. The „live“ wires must be connected to the slots on the
terminal block marked N and L (AQC 3-1 only) or L and L (all
other versions). The ground wire must be connected to slot
marked with the ground symbol.
4. Reinstall plastic cover.
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DANGER Electrocution
AS WITH ANY ELECTRIC APPLIANCE, FAILURE TO
ELECTRICALLY GROUND UNIT MAY RESULT IN SERI-
OUS INJURY OR DEATH.
7. Putting the water heater into
operation
!
WARNING
OPEN HOT WATER FAUCET FOR A FEW MINUTES UNTIL
WATER FLOW IS CONTINUOUS AND ALL AIR IS PURGED
FROM WATER PIPES. THE UNIT’S PLASTIC COVER
MUST BE INSTALLED BEFORE THE CIRCUIT BREAKER
IS TURNED ON.
1. Turn on circuit breaker to bring electrical power to the unit.
2. Open hot water faucet to a degree so that water flow is
„typical“ i.e. until the water flow is the same as that encoun-
tered during normal use.
3. Wait twenty seconds until temperature has stabilized. Then
check water temperature. If temperature is too low, the
water flow rate needs to be reduced. In order to do this,
turn off the unit’s circuit breaker, remove the cover and turn
the flow adjustment screw shown in illustration clockwise
1/2 turn (180 degrees). Then reinstall plastic cover, turn on
circuit breaker and check water temperature. This proce-
dure should be repeated until the desired temperature is
achieved. In case the water temperature is too high, turn
the flow adjustment screw counter clockwise in the same
manner until the desired temperature is achieved. The ar-
rows in illustration refer to the water temperature.
4. In order to obtain temperature control at a single spout mix-
er-type faucet, restrict cold water flow to faucet by partially
closing the cold water shut-off valve under the sink until
cold water and hot water flow rates are approximately the
same.
8. Normal maintenance
AquaPower AQC tankless heaters are designed for a very long
service life. Actual life expectancy will vary with water quality
and use. The unit itself does not require any regular mainte-
nance. However, to ensure consistent water flow, it is recom-
mended to periodically remove scale and dirt that may build
up at the aerator of the faucet or in the shower head. Also, the
