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INSTALLATION
Installing the Unit
An adhesive backed paper template is shipped with the unit
and is used to locate the sink strainer holes. Use the following
procedure to mount the unit to the sink or holding vessel.
BURN HAZARD: Drain water may reach temperatures
in excess of 200°F (93°C). Use appropriate plumbing
materials when installing drain.
Do not use extension pipes on the inlet and outlet
connections on water heater units. Poor performance or
unsafe conditions may occur.
Auto-Fill units must be installed with adequate backflow
protection and must conform with all federal, state, and
local codes.
NOTE: FR2 Hydro-Heaters should be installed with a
perforated water baffle (not supplied with unit) to
distribute the heated water properly. The baffle should
be 3/4" (19 mm) high with a divider wall between
the inlet and outlet. The baffle should also have 3/4"
(19 mm) holes around the periphery every 6" (152 mm).
3/4" (19 mm) holes
around periphery on
6" (152 mm) centers.
Outlet
Watter Baffle Installation (FR2 Models)
CAUTION
3/4" (19 mm) high baffle
with divider wall between
inlet and outlet.
NOTE: 3CS2 Hydro-Heaters should be mounted in the center
of a sink or holding vessel.
(914 mm)
3" (76 mm)
Diameter
NOTE: The dotted lines in the image above indicate the
position of the unit under the sink or holding vessel.
1. Expose the adhesive back of the paper template and
position it on the bottom of the sink or holding vessel.
• The decal should be positioned exactly above where
the Hydro-Heater will be positioned below the sink or
holding vessel.
• Make sure the front edge of the decal is flush with the
front edge of the sink or holding vessel.
• FR2 Series Hydro-Heaters should be positioned with no
more than 3' (914 mm) on either side when mounted
under the sink or holding vessel.
2. Center punch and drill a 3/4" (19 mm) pilot hole at each of
Inlet
the two center marks on the template.
NOTE: The pilot holes are for cutting larger holes with a
knockout hole punch.
3. Remove the template and cut a 2" (51 mm) diameter hole
at each pilot hole location using a knockout hole punch.
4. Make a 1/8" (3 mm) offset around each 2" (51 mm)
diameter hole. The offset should be a diameter of 3"
(76 mm) centered around the hole.
Sink or Tank
Bottom
5. Unscrew the drain spud assembly from the welded pipe on
the heater.
8
3'
MAX
Offset
Front edge should be flush to the
front of the sink or holding vessel.
Top View of Holding Vessel
3"
(76 mm)
Dia. Offset
2"
(51 mm)
Dia. Hole
Side View of Hole and Offset
English
3'
(914 mm)
MAX
Holding Vessel
Drain
3/4" (19 mm)
Pilot Hole
2" (51 mm)
Diameter Hole
1/8"
(3 mm)
Offset
Height
HHM-0224
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