Empire Mantis FG28BM-1, Руководство по установке, Страница: 11 / 52

31792-4-1115 Page 11
VENTING REQUIREMENTS
WARNING
This appliance must not be vented with any other applianc-
es, even if that appliance is of the condensing type. Com-
mon venting can result in severe corrosion of other appli-
ances or their venting and can allow combustion gases to
escape through such appliances or vents. Do not vent the
heater into a fireplace chimney or building chase.
WARNING
Upon completion of the installation, carefully inspect the en-
tire flue system to assure it is properly sealed. DO NOT use
any vent material other than what is specified in this manual.
Leaks in the flue system can result in serious personal injury
or death due to exposure of flue products, including carbon
monoxide.
The Mantis is classified as a “Category IV” appliance, which re -
quires special venting materials and installation procedures.
Installations can be Conventional (one-pipe) and Direct Vent
(two-pipe). Venting must be completed with 1-1/2 inch diameter
pipe. In selecting a location for installation, it is necessary to pro -
vide adequate clearances for servicing and proper installation.
All vent and combustion air pipes and fittings must be Schedule
40 PVC and meet the ANSI/ASTM Standard D1785. Cement must
conform to ASTM Standard D2564.
Maximum Vent Length is 40 feet with three 90° elbows. The
minimum vent length is twelve inches. 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. See Table 1.
It is recommended that the Mantis Power-Vent High-Efficiency
Fireplace be located on an exterior wall for ease of venting. The
flue exhaust pipe and inlet air pipe should be located between wall
studs. The required opening for venting is 1-7/8 inch in diameter
for 1-1/2 inch PVC pipe.
For vent clearances refer to Figure 1 pg 10.
The bottom of the exhaust vent terminal and the air intake shall be
located at least twelve inches above grade and must be vented
outside. It is recommended the exhaust and intake be located
twelve inches from the maximum snow level.
The flue pipe must be supported on horizontal vent runs. The flue
pipe needs to be supported every three feet. All horizontal runs of
the flue must be pitched ¼ inch per foot either towards the fire -
place or away from the fireplace.
Note: If the vent run dips or sags, condensation may become
trapped and cause the unit to not operate properly.
The minimum vent length protruding from outside the wall is six
inches. For two-pipe installation, a minimum distance of three
inches and maximum distance of 24 inches must be maintained
between the pipes. See Figures 2 and 3.
Single flue (one-pipe) installations must have a minimum clear -
ance of two inches on the back of the fireplace for combustion air.
Note: If vent length requirements are not followed, the unit
will not operate properly.
Figure 3 - Colinear Direct Vent
Table 1 - Equivalent Vent Length Example
EVL = Equivalent Vent Length
EVL must be greater than or equal to 1’ and less than or equal to 40’
EVL = 90º elbow + 4’ straight pipe + 45º elbow + 2’ straight pipe + 45º elbow + 3’ straight pipe = 15’
EVL = 3’
(90º elbow)
+ 4’
(straight pipe)
+ 1.5’
(45º elbow)
+ 2’
(straight pipe)
+ 1.5’
(45º elbow)
+ 3’
(straight pipe)
= 15’
12” MIN
TO GRADE.
(RECOMMENDED
12” MIN
TO MAX
EXPECTE
D SNO
W LEVEL
)
6” Min
12” MIN
TO GRADE.
(RECOMMENDED
12” MIN
TO MAX
EXPECTE
D SNO
W LEVEL
)
TYPICAL
BOTH
PIPES
9” Min
3” Min
24” Max
EXHAUST
INLE
T
6” Min
Figure 2 - Single Flue