Empire Heating Systems PVS18N-3, Owner'S Manual And Installation Instructions

Page: 27 / 96

37873-0-0217 Page 27
VENTING
WALL FURNACE INSTALLATION
The flue exhaust pipe and inlet air pipe should be located between
wall studs. If an existing unit is being replaced, the flue exhaust
and inlet pipes may be run continuously through the existing flue
pipe or wall opening. See page 15 for special termination kits. The
required opening for venting is 1-7/8 inch in diameter for 1-1/2 inch
pipe, and 2-3/8 inch diameter for two inch pipe.
The flue outlet must be at least twelve inches from any opening
which flue gases could enter the building. See Figure 38. The flue
outlet must be a minimum distance of three feet from any pressure
regulator.
The bottom of the exhaust vent terminal and the air intake must
be located at least twelve inches above grade or the maximum
snow level.
The pipe must be supported every three feet on horizontal runs
and every 10 feet on vertical runs. All horizontal runs must be
pitched ¼ inch per foot towards the wall furnace.
Notice: If the vent run dips or sags, condensation may become
trapped and cause the wall furnace to not operate properly.
The minimum vent length protruding from outside the wall is ten
inches. For two-pipe installation, a minimum distance of five inch -
es from pipe centers and maximum distance of 24 inches must be
maintained between the pipes. See Page 31.
Maximum Vent Length is 50 feet. Each 90° elbow used in the
vent system will be the equivalent to three feet, and each 45°
elbow is equivalent to 1.5 feet, which should be added to the
overall vent length. The vent terminal does not contribute to the
overall vent length measurement.
Notice: If vent length requirements are not followed, the wall
furnace will not operate properly.
Vent Freezing Protection
When the vent pipe is exposed to temperatures below freezing
(i.e. when it passes through unheated spaces, chimneys, etc.) The
pipe must be insulated with 1/2 inch thick sponge rubber insula-
tion, Armaflex-type insulation or equivalent (Ameraflex is a regis -
tered trademark of Amaracell). Insulating pipe is important to avoid
condensate icing. See Figure 39.
Figure 39
The minimum flue length off the wall is 10”.
The bottom of the exhaust vent terminal and the air intake shall
be located at least 12 inches above grade or expected snow level.
WARNING
The nearest point of the vent cap should be a minimum
horizontal distant of three feet (0.91m) from any pressure
regulator. In case of regulator malfunction, the three feet
(0.91m) distance will reduce the chance of gas entering the
vent cap.
Notice: Clean all debris from the inside of the flue pipe prior
to applying the glue and final assembly of the pipe. Since the
condensate is designed to flow back to the appliance this debris
will be carried to the condensate trap resulting in a clog. An “A2”
error will appear on the display panel if this happens. The clog,
and the work required to fix it, can be easily prevented by pulling
a wet cloth through the pipe prior to applying the glue and final
assembly.
Install Vent Termination and Piping
The UltraSaver may be installed with up to 50’ equivalent length
venting.
Notice : For each 45° elbow installed in the run, the length
of the run MUST be reduced by 1.5 feet (45 cm). Reduce the
length of the run three feet (91.4 cm) for every 90° elbow. The
vent terminal elbow does not contribute to the overall vent
length measurement.
See pages 29 through 32 for vent termination and vent run ex-
amples and requirements.
This unit is vented directly out the back using 1-1/2” or 2” PVC
pipe. See Figure 38 for exterior vent hole location.
If 1-1/2” pipe is used, it must be enlarged to 2” pipe prior to exit-
ing the wall into the shroud.
If venting out the back through the wall is not possible (such as
in a basement) the vent pipes may be run in front of the wall (left,
right, or up) inside of the room using an optional deep shroud.
See page 15.
When venting through the wall, be sure to leave 2-3/8” (51mm)
of flue pipe extending through the rear shroud into the room for
connection to the inducer. See Figure 40.
2 3/8
”
(60mm)
Figure 40