JOHNSON CONTROLS
63
20
FORM 155.17-N1
ISSUE DATE: 4/1/2013
SECTION 20 – DRAFT CONTROL
There are two commonly used ways to maintain the
pres sure at the outlet of the high-temperature genera-
tor. Either man u al or automatic/motorized draft con-
trol can be used.
All YORK direct-fired ParaFlow
TM
chiller/heaters
with a Power Flame burner will come standard with
a manual backdraft damper. This backdraft damper
ships loose for field mounting on the back side of the
high-temperature gen er a tor (outlet). The damper can
be mod i fied for mo tor ized op er a tion either at the John-
son Controls factory (if specially or dered that way) or
in the field if site conditions re quire.
Figure 29 on page 63 illustrate two different types
of manual backdraft dampers. One of these dampers
will be supplied by Pow er Flame and shipped loose
with each chill er ship ment.
C D D D
H
ATTAC H TAG
PWF 253
TO OUTLET
STACK
SENSING PORT
(2) EACH
12"
4" 150# FLANGE – 12SC - 14SC
6" 150# FLANGE – 15SL - 19GL
"A" x 1/2
DRAIN PORT
18-1/4"
G
"B" x 1/2
"B" x 1/4
"F" (TYP.)
4 SIDES
"M" DIA., ("N" HOLES)
"B"
"J" (TYP.)
"I"
"K"
"L" (TYP.)
"A"
12-1/4"
2"
LD05318
FIGURE 29 - MANUAL & MOTORIZED BACKDRAFT DAMPER WITH FGR CONNECTION
TABLE 2 - MANUAL BACKDRAFT DIAGRAM
MODEL PF P/N "A" "B" "C" "D" "F" "G" "H" "I" "J" "K" "L" "M" "N"
12SC/13SC/14SC
P/N 131000
24-1/2 22-1/2 4-9/16 5-1/8 2 24 5-7/8 3/4 10-1/2 3/4 11-1/2 1/2 8
15SL/16S
P/N 131020
27-1/4 27-1/4 4-23/32 5-15/16 2 24 5-7/8 13/16 12-13/16 13/16 12-13/16 1/2 8
16SL/17S/18S/19S
P/N 131030
34-1/2 34-1/2 5-13/16 7-5/8 2 24 5-7/8 13/16 16-7/16 13/16 16-7/16 5/8 8
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