10 UV-PRC001-EN
Hydronic Auxiliary Coils
Hydronic Auxiliary Coils
All hydronic coils are wavy plate
finned and available in varied ca-
pacities (Table 7 and 8 listed be-
low). The coils are hydrostatically
tested at 350 PSI.
A manual air vent is installed on
the return header. All auxiliary
coils have opposite end supply/re-
turn connections from the main
coil.
See Figure 12 for auxiliary
PREHEAT coil header sizing,
and Figure 13 for auxiliary RE-
HEAT coil header sizing.
Table 7: Auxiliary preheat coil data
Coil
Description
Coil
Type
Unit
Size
Fins per
inch FPI
Rows
Heating
(Aux.)
Face
&
Bypass
CW-Main
HW-Preheat
Aux. Coil
DA
075-200
12
1 H&V
DC 16
DD 12
DE 16
HW ONLY
Main
Coil FA
075-150
12
1
Not
Available
200 14
Figure 13: Auxiliary REHEAT coil header sizing for 2-pipe
and 4-pipe systems. Right hand configuration
shown.
Indicates air flow
Table 8: Auxiliary reheat coil data
Coil
Description
Coil
Type
Unit
Size
Fins per
inch FPI
Rows
Heating
(Aux.)
Face
&
Bypass
CW-Main
HW (reheat)-
Aux. Coil
R1 075-200 12 1 Horiz
ONLY
R2 075-200 16 1
Figure 12: Auxiliary PREHEAT coil header sizing for 4-pipe
systems. (Right hand configuration shown.)
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