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Installation of Subbase
Hydronic Subbase
A subbase is available as required with all hydronic
units. This subbase measures 8" (203mm) in height
and includes the hydronic heating coil. Refer to IM
Bulletin 936 for installation details. In addition, rough
in supply and return piping.
Figure 9. Hydronic Subbase
3/4"
As Req'd
"
1
2
/
2
8
"
1
/
4
3" x 5" Opening for Electrical
and/or Piping Rough-in
"
1
7
/
4
3/4"
NOTES:
1. Side channels are adjustable from 0"–9
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
Optional Condensate Drain Kits
Internal Drain Kit
Receptacle (Factory installed when
fuse & disconnect are furnished)
15"
5/8" O.D. Copper Sweat
Top View
Permanent
Mesh Filter
41
"
1
/
2
Front View
3
/
" in length by inverting them. Side channels are predrilled to allow
8
1
1
/
"–1
/
".
4
4
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
"
1
2
/
2
"
1
"
7
/
1
"
1
1
3
/
Electrical
/
2
4
2
6
"
3
/
Knockout
4
5
"
1
/
2
External Drain Kit
Alternate 6" Long, 1/2" O.D.
Straight Copper Tube
IM 934-2 Applied PDAA/PDHA / Page 9 of 44
8"
1/4" – 1
"
1
/
4
Leveling Legs
End View
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