5
Before locating the appliance, check:
1. Check for nearby connection to:
• Heating system water piping
• Electrical power
• DHW system water piping
2. Locate the appliance so that if water connections
should leak, water damage will not occur. When such
locations cannot be avoided, it is recommended that a
suitable drain pan, adequately drained, be installed
under the appliance. Under no circumstances is the
manufacturer to be held responsible for water damage
in connection with this appliance, or any of its
components.
3. If a new water heater will replace an existing water
heater, check for and correct system problems, such as:
• System leaks causing oxygen corrosion or heat
exchanger cracks from hard water deposits.
• Incorrectly-sized expansion tank.
• Lack of freeze protection in the appliance water
causing the system and the appliance to freeze and
leak.
⚠
WARNING
This appliance is certified as an indoor
appliance. Do not install the appliance
outdoors or locate where the appliance will
be exposed to freezing temperatures or to
temperatures that exceed 100°F.
Do not install the appliance where the
relative humidity may exceed 95%. Do not
install the appliance where condensation
may form on the inside or outside of the
appliance, or where condensation may fall
onto the appliance.
Installation clearances
1
Determine APW location
The heater must be installed with the prescribed clearances
for service as shown in FIG. 1-1 on page 6. The recommended
minimum clearance dimensions are listed below; however, if
local building codes require additional clearances, these codes
shall supersede the recommendations listed below:
• Sides: 24 in. (61 cm)
• Front: 24 in. (61 cm)
• Rear: 24 in. (61 cm)
• Top: 12 in. (30.5 cm)
All water piping and electrical conduit must be arranged so
that it does not interfere with the removal of the APW water
heater assemblies/parts or inhibit service or maintenance of
the unit.
Site selection and preparation
Ensure that the site selected for installation of the APW water
heater includes the following:
• Access to AC input power at 120 VAC/60 Hz
• Close proximity to system boiler loop to be used as heating
fluid source.
• If applicable, access to ModBus network wiring within the
prescribed wire lengths (see the Section 6 - Wiring)
Indirect Plate Water Heater Installation & Service Manual