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OPERATION
OVERVIEW
6 | AQM TANKLESS ELECTRIC WATER HEATERS WWW.APTANKLESS.COM
6. Overview
6.1 General Description
The AQM tankless water heater di ers from conventional storage
type water heaters in several ways. It does not store hot water.
Instead, water is heated instantaneously as it ows through the
unit. The powerful heating elements are activated by a ow
switch as water is drawn from a hot water faucet connected to
the AQM. Due to the absence of stand-by losses, the AQM o ers
greater energy e ciency than storage type water heaters. The
unit will continuously supply hot water as long as the faucet is
open.
The temperature of the hot water delivered by the AQM depends
on the wattage of the heating element, the temperature of the
incoming cold water, and the water ow rate through the unit.
In order for the AQM to operate properly, it must be carefully
matched to the application.
In case you have questions regarding the way you plan to use the
AQM, please call our technical service line at 800.582.2213 (USA
and Canada). For service outside the U.S. and Canada, please call
us at USA 413.247.3380. You can also e-mail us at info@aptankless.
com or fax us at 413.247.3369.
The AQM can be used for hand washing type applications in
the U.S. and Canada:
– Restroom sinks in commercial/industrial facilities
and homes
– Kitchen areas in commercial /industrial facilities
and homes
– Cabins
– Special uses in photo developing shops,
laboratories etc.
The AQM can also be used for whole apartments and homes in
warm climate zones such as the Caribbean region, Central America
and Mexico due to the higher ambient water temperatures.
This manual must be read carefully before attempting to install the aqm water heater. If you do not follow the safety
rules or the instructions outlined in this manual, the unit may not operate properly and it could cause property damage,
serious bodily injury and/or death.
Aqua Power
®
will not be liable for any damages because of failure to comply with the installation and operating instructions
outlined in this manual or because of improper use. Improper use includes the use of this appliance to heat any liquid
other than water. Failure to comply with the installation and operating instructions or improper use voids warranty. Never
remove the unit’s cover unless the electricity is turned o .
If you have any questions regarding the installation or operation of this water heater, or if you need any additional
installation manuals, please call our technical service line on 800.582.2213 (USA and Canada only). If you are calling
from outside the U.S. Or Canada, please call usa 413-247-3380 and we will refer you to a quali ed Aqua Power
®
service
representative in your area.
6.2 Important information before supplying power
to unit
Air in the cold water pipe will destroy the bare-wire
heating system of the AQM. If the water supply to
the AQM has been interrupted, for example due to the risk
of frost or work on the water pipe, the following steps must
be carried out before the unit is used again.
» 1. Turn o circuit breaker.
» 2. Open a hot water tap downstream of the unit for as long
as is necessary for the unit and the cold water pipe to be
free of air.
» 3. Turn on circuit breaker.
All information in these Instructions for Use and Installation
must be followed carefully. They provide important
information with regard to safety, operation, installation,
and maintenance of the device.
6.3 Hot water output
Model Wattage @ max
rated voltage
Typical hot water output
AQM 2-1 1.8 kW 0.32 gpm / 1.2 l/min
AQM 2.5-1 2.4 kW 0.50 gpm / 1.9 l/min
AQM 3-1 3.0 kW 0.50 gpm / 1.9 l/min
AQM 3.5-1 3.5 kW 0.66 gpm / 2.5 l/min
AQM 4-2 3.5 kW 0.66 gpm / 2.5 l/min
AQM 6-2 5.7 kW 1.00 gpm / 3.8 l/min
AQM 2-1 models are internally restricted to 0.32 gpm (1.3 l/
min). AQM 2-1, 2.5-1, 3-1 ship with a 0.5 gpm (1.9 l/min) pressure
compensating ow reducer/aerator that must be installed. AQM
3.5-1, 4-2 ship with a 0.66 gpm (2.5 l/min) pressure compensating
ow reducer/aerator that must be installed.
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