Schwank P40U Fenwal User Manual
Page 18
18
P40U-F / P40U-IF I&O Manual
IM101220
RD: MAY 2014
RL: 5A
H
ORIZONTAL
VENT
THROUGH
A
SIDE
WALL
:
Maximum allowable flue vent length is equivalent to 20 feet [6.1 m]
A maximum of two 90°elbows (each equivalent 5 ft [1.5 m]) can be installed in the vent
The flue vent system must slope downwards approximately 1/4" per foot (63 mm / 300 mm)
toward the vent terminal, from the termination of the tube - radiant tube must be level.
continued ……..
’B’ Vent
Through
Wall
18” Min.
These minimum clearance
apply when using the
following Vent Terminal
4” (10 cm) - JA-0528-XX
or
6” (15 cm) - JA-0529-XX
See notes below
for use of other
approved vent terminations
FIGURE 10 - Horizontal Vent - ALL vent pipe and adapters by others
need to be equidistant to the vent Tee, but must comply to requirements below. The two
heaters must be controlled by a single common thermostat or “ON/OFF” switch.
A minimum 12 inch (30 cm) length of minimum 26 gauge single walled 4” (10 cm) diameter
vent pipe is to be installed on the swaged end of the tube before any Tee or Elbow is fitted.
Seal all vent connections with high temperature sealant. Vent connections must be secured
with three (3) #8 sheet metal screws uniformly spaced around the circumference of the
vent pipe.
When the vent pipe passes through a cold or unheated area where the ambient tempera-
ture is likely to produce condensation of the flue gases, the vent pipe will be insulated with
a suitable material as approved and specified by the insulation manufacturer to withstand
temperature up to 460°F (238°C).
The vent system must always be adequately supported to prevent sagging.
Single wall vent
from heater
‘C’ to ‘B’
adapter
Combustible Overhang
6”
Min.
FIGURE 9 - Heater Expansion - Suggested Vent Configuration*
By Others
All Vent Pipe & Adapters
By Others
* Other means of slip fit
installation of the vent
and duct are acceptable
providing there is ade-
quate allowance for free
expansion and contrac-
tion of the system, and
free flow of vent gases
and combustion air.