Fulton Pulse DWH (PDWH) Domestic Water Heater - Manual (Page 23)

Wall Thimble
Installation
A 9" diameter thimble is inserted through
the wall from the outside. Secure the
outside flange to the wall with nails or
screws, and seal with adhesive material.
Install the inside flange to the inside wall,
secure with nails or screws, and seal with
adhesive material. Pass the vent pipe
through the thimble from the outside and
join to the rest of the vent system. Seal the
pipe to the thimble flange with adhesive
material. Figure 14. Install two pipe retain-
ing clamps around the intake as well as
vent pipes on both ends of the wall
thimble (on the inside and outside of the
wall) through which intake and vent pipes
are passed when tightened securely. They
will prevent the intake and vent pipes
from being pushed or pulled.
Ensure wall thimble for 6” exhaust vent
contains internal insulation prior to
installation.
Horizontal Vent
Termination
The vent termination is joined to the vent
pipe outside the wall. Use the same join-
ing procedures for vent pipe and fittings.
The termination of the vent system must
be at least 12" above the finished grade,
or at least 12" above normal snow accu-
mulation level (for applicable geographi-
cal areas). Refer back to previous page
Figure 13. The termination of the vent
system shall not be located in traffic areas
such as walk-ways, adjacent buildings,
openable windows and building openings
unless the venting system is at least 7 feet
above finished grade, (National Fuel Gas
Code, ANSI Z223.1). The vent termination
must be at least 4 feet (1.22m) horizontally
from, and in no case above or below,
unless a 4-foot 1.22m) horizontal distance
is maintained from electric meters, gas
meters, regulators, and relief equipment.
The air supply inlet and exhaust outlet
must be separated from 3ft. minimum to
10ft. maximum on the same wall. The
exhaust outlet must be installed 2ft.
minimum above and downwind from air
supply inlet to prevent exhaust
recirculation. Under certain wind
conditions, some building materials may
be affected by flue products expelled in
close proximity to unprotected surfaces.
Sealing or shielding of the exposed
surfaces with a corrosion resistant
material (such as aluminum sheet) may
be required to prevent staining or
deterioration.
Do not locate the vent termination too
close to shrubbery as flue products may
stunt or kill them.
After Installation/Prior
to Start-Up
WARNING
Do not attempt to start water heater before
filling and purging water heater heating
system. A dry fire will seriously damage
the water heater and may result in
property damage or personnel injury and
is not covered by warranty.
1. Completely fill and purge the heating
system using the following sample
procedure.
NOTE
The following purge procedure is
applicable to the piping configuration as
shown in Figure 15 on the following page.
a. Close combination shutoff/purge valve
in supply, all drain cocks, the shutoff valve
for the pressure reducing (fill) valve, and
all manual air vents.
b. Open all other system shutoff valves
and open a faucet or other water
discharge source.
c. Water will now begin to fill the system.
Continue fiIling until a constant stream of
water (no bubbling) is discharged.
d. When all air has escaped and only
water is discharged, close faucet or water
discharge source
e. At this point, the system has been initially
filled. However, air pockets may still remain
at high points in the system. It is possible,
depending on the particular system that
faucet used for filling still contains nothing but
air. If manual vents are installed on the
system high points, these should be opened
Installation
21-PDWH
Figure 14
Nominal Pipe & Thimble Diameters
Pipe Size (in.) A
Ø
B
Ø
C
Ø
3" 6 7 /
8
" 5 7 /
16
" 3 5 /
16
"
4" 9 3 /
8
" 8 1 /
2
" 4 3 /
16
"
6" 8 1 /
8
" Fixed 6 1 /
8
"
Pipe Size (cm) A
Ø
B
Ø
C
Ø
7.62 17.46 13.81 8.41
10.16 23.81 21.59 10.63
15.24 20.64 Fixed 15.56