10
2
General venting
Installation & Service Manual
This appliance has five venting options. They are:
1.
Conventional Negative Draft Venting
Conventional negative draft venting with vertical
termination.
2.
E+ with a Vertical Conventional Vent
E+Vent with a vertical conventional vent for flue
products and a combustion air pipe from either the
sidewall or roof top.
3.
Direct Venting with Sidewall Terminations
Direct vent with sidewall terminations for flue
products and combustion air.
4.
Direct Venting with Vertical Terminations
Direct vent with vertical through-roof terminations
for flue products and combustion air.
5.
Outdoor Installation
Outdoor installation consists of the installation of
a special vent cap / top assembly, gas valve cover,
deflectors, and a weatherproof junction box.
Vent system options
All appliances are shipped from the factory equipped for
conventional negative draft venting. All other optional vent
systems require the installation of specific vent kits and
venting materials. The following is a detailed explanation
of the installation requirements for each venting system,
components used and part numbers of vent kits for each
model.
E+Conventional Venting
Figure 2-5 Conventional Venting Installation
Conventional Negative Draft Venting
System
Follow all requirements in the General Venting section for
venting flue products to the outdoors, obtaining adequate
combustion and ventilation air and general installation
instructions. All conventionally vented appliances must have
combustion and ventilation air supplied to the mechanical
room in accordance with the latest edition of the National Fuel
Gas Code, ANSI Z223.1, in Canada, the latest edition of CAN/
CGA B149 Installation Code for Gas Burning Appliances and
Equipment, or applicable provisions of the local building codes.
A bell increaser is installed directly on the appliance vent
outlet. The bell increases the vent size by 1 inch (25.4 mm)
in diameter. The bell increaser
MUST
be installed on the
appliance vent outlet for all conventional negative draft vent
systems. Vent connection is made directly to the bell increaser
on top of the appliance. No additional draft diverter or
barometric damper is required on single appliance installations
with a dedicated stack and a negative draft within the specified
range of a negative 0.02 to 0.05 inches water. Multiple
appliance installations with combined venting or common
venting with other negative draft appliances require that each
appliance must have a barometric damper installed to regulate
draft within the proper range. If the draft in a dedicated stack
for a single appliance installation exceeds the specified draft, a
barometric damper must be installed to control draft.
The vent pipe sizes are:
TABLE 2A
CONVENTIONAL VENT FLUE SIZE
Input Btu/hr
Flue Size*
150,000
5"
199,999
5"
250,000
6"
300,000
6"
*Vent size with 1” bell increaser installed for conventional
negative draft venting
On a conventionally vented, negative draft appliance, the
connection from the vent to the stack or vent termination
outside the building
MUST
be made with listed Type “B”
double wall (or equivalent) vent connectors and must be direct
as possible with no reduction in diameter. Use the National
Fuel Gas Code venting tables for double wall vent to properly
size all vent connectors and stacks. The Type “B” vent and
accessories, such as firestop spacers, thimbles, caps, etc.,
MUST
be installed in accordance with the manufacturer’s listing.
Содержание Efficiency-Pac EW 150 -- 300
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