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Electric Subbase
An electrical subbase is optional for all 208V and 230V units. A
subbase is standard for all 265V units. The standard subbase is
available with 3" (76mm) or 4" (102mm) heights. The subbase
contains leveling legs for adjustment of up to 1" (25mm)
additional height. All subbases are factory supplied.
Installation
Install the subbase as follows:
1. If the minimum depth subbase is required, discard the side
extension pieces.
2. If more than the minimum depth is required, determine the
depth of the side extension pieces desired and break at the
Figure 12. Standard (Electric) Subbase
3" x 5"
(76 to 127mm)
Opening for
Electrical and/or
Drain Rough-In
Knockouts for
Opitonal Fuse &
Disconnect Switch
Hydronic Subbase
A subbase is supplied as standard with all hydronic units. This
subbase measures 8" (203mm) in height and includes the
hydronic heating coil. Refer to IM Bulletin 419 for installation
Figure 13. Hydronic Subbase
3/4"
As Req'd
1
2
/
"
15"
2
8
1
/
"
4
3" x 5" Opening for Electrical
and/or Piping Rough-in
5
/
" O.D. Copper Sweat
8
7
1
/
"
4
3/4"
IM 368 / Page 8 of 20 (Rev 11/03)
Subbase Installation
Electrical
Junction
Box for Main
Power Connection
Receptacle (Req'd
on 265V Units)
Plug/Cord Cover
(Req'd on 265V
Units)
Receptacle (Factory installed
when fuse & disconnect are
furnished)
2
1
/
"
2
Top View
1
7
/
"
2
Permanent
3
6
/
"
4
Mesh Filter
1
41
1
/
"
2
Front View
proper score line. Insert the extension pieces into the front
assembly and secure with two short black screws at
each side.
3. Insert leveling bolts into subbase bottom flange. Four (4) bolts
will be needed if side extensions are used. Only two (2) bolts
are required if side extensions are not used.
4. Place the subbase on the floor and align its center line with
the center line of the wall opening. Do not fasten the subbase
to the floor. Attach the subbase to the cabinet wall sleeve
using clips provided with the subbase.
5. The wiring should be roughed in and the conduit connected
to the subbase junction box. Complete the installation by
wiring the receptacle to the incoming power supply.
7
⁄
"
8
5
⁄
"
8
3"
5"
2
1
⁄
"
2
Leveling Screw (4 Places)
Front Elevation (Three Front Panels in Place)
details. In addition, rough in supply and return piping. Electrical
and plumbing rough-in can be done through the back of the
hydronic heat section or through the openings provided in the
bottom of the subbase. The finished piping can be done now or later.
Fuse
Optional Fuse
Disconnect
3
1
/
"
Electrical
4
Knockout
1
/
"
2
5
1
/
"
2
1/4" – 1
1
/
"
4
End View
Electrical Knockouts
17"
12"
Plan
41
1
⁄
"
2
NOTES:
1.
Side channels are adjustable from 0"–9
length by inverting them. Side channels are
predrilled to allow infinite adjustment.
2.
Subbase shown with louvered front panel
removed. Front panel is hinged to allow
access to valve, coil, filter & electrical
junction box.
3.
Leveling legs are adjustable from
8"
Leveling Legs
3
0" to 9
⁄
"
8
3
4
⁄
"
8
1
1
⁄
"
2
3"or 4"
0" to 1"
3
/
" in
8
1
/
"–1
1
/
".
4
4
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