Natco Fire Coil 85, Инструкция по установке и эксплуатации

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National Combustion Co., Inc.
Page 8
In addition to air needed for combustion, air shall
also be supplied for ventilation, including all air required
for comfort and proper working conditions for personnel.
The Fire Coil 85 loses less than 1 percent of its input
rating to the room, but other heat sources may be present.
2.2 Venting
2.2.1 Vent Categories
Depending upon desired Fire Coil 85 venting, it
may be considered a Category I or a Category III
appliance. In general, a vertical vent system will be a
Category I system. However, in rare instances, a vertical
vent system may be considered Category III. In the U.S.,
the National Fuel Gas Code (ANSI Z223.1-Latest
Edition), or in Canada the CSA B149.1 (latest edition),
defines a Category I vent system, and includes rules and
tables to size these vent systems. If the Fire Coil 85’s
vertical vent system does not satisfy the criteria for
Category I venting, it must be vented as a Category III
system.
All Fire Coil 85 vent systems which discharge
horizontally (without the use of a power venter) are
considered Category III vent systems.
2.2.2 Category I Vent
When vented as a category I appliance, the vent
system must conform to the National Fuel Gas Code (ANSI
Z223.1-Latest Edition) in the U.S., or in Canada, to CSA
B149.1 (latest edition). The vent system must be sized and
installed for a Category I Fan-Assisted Appliance.
If chimney height is greater than 25 feet, or if multiple
units are vented into the same vertical vent, a barometric
damper must be installed on each appliance, such that the
flue draft does not exceed (negative) 0.1" w.c.
If using a power venter for any type of Category I
venting, the draft should be set between (negative) 0.01
and 0.10" w.c.
2.2.3 Common Venting Systems
Fire Coil 85 units are Category I fan-assisted when
vented vertically and adhering to all applicable codes.
When common venting Fire Coil 85 fan-assisted
unit with other appliances through one shared vertical
duct called a “common vent”, special care must be taken
by the installer to ensure safe operation. In the event that
the common vent is blocked, it is possible, especially for
fan-assisted devices, to vent backwards through non-
operating appliances sharing the vent, allowing
combustion products to infiltrate occupied spaces.
If the
appliances are allowed to operate in this condition,
serious injury or death may occur.
WARNING
Operation of appliances with a blocked common vent
may lead to serious injury or death. If safe operation of
all appliances connected to a common vent cannot be
assured, including prevention of spillage of flue gasses
into living spaces, common venting should not be applied,
and appliances should each be vented separately.
Proper vent sizing, construction and safety
requirements from the National Fuel Gas Code, ANSI
Z223.1 or in Canada, from CSA B149.1 as well as all
applicable local codes must be followed.
As an additional precaution, it is recommended that
a Carbon Monoxide (CO) alarm be installed in all
enclosed spaces containing combustion appliances.
Fire Coil 85 units are not allowed to be vented into
a common horizontal vent system, unless a properly
sized vent fan is used, and the common vent system is
properly designed by the vent fan manufacturer or a
qualified engineer.
Refer to the installation and operating instructions on
all appliances to be common vented for instructions,
warnings, restrictions and safety requirements. If safe
operation of all appliances connected to a common vent
cannot be assured, including prevention of spillage of flue
gasses into living spaces, common venting should not be
applied, and appliances should each be vented separately.
2.2.4 Category III Vent
When the Fire Coil 85 is vented with horizontal
discharge, it must be installed per this installation
manual and the venting system manufacturer’s
installation instructions. The vent system must be sealed
stainless steel (
see Table 5 ).
Figure 3. Combustion Air and Vent Through Roof.
TERM DESCRIPTION
Pipe
Single-wall galvanized steel pipe, 24 gauge
minimum (either insulated or non-insulated)
Joint
Permanent duct tape or aluminum tape
Sealing
Table 4. Required Combustion Air Piping Material.