IM 934-2 Applied PDAA/PDHA / Page 9 of 44
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.
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.
Figure 9. Hydronic Subbase
3/4"
Receptacle (Factory installed when
fuse & disconnect are furnished)
As Req’d
NOTES:
1. Side channels are adjustable from 0"–9
3
/
8
" in 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
1
/
4
"–1
1
/
4
".
2
1
/
2
"
8
1
/
4
"
2
1
/
2
"
1
1
/
2
"
1/4" – 1
1
/
4
"
8"
3
1
/
4
"
5
1
/
2
"
7
1
/
2
"
6
3
/
4
"
7
1
/
4
"
3/4"
41
1
/
2
"
15"
Fuse
5/8" O.D. Copper Sweat
3" x 5" Opening for Electrical
and/or Piping Rough-in
Optional Fuse Disconnect
Permanent
Mesh Filter
Electrical
Knockout
Top View
Front View
End View
Leveling Legs
Optional Condensate Drain Kits
Alternate 6" Long, 1/2" O.D.
Straight Copper Tube
External Drain Kit
Internal Drain Kit
