CGi Manual
Part Number 550-142-302/0520
CGi
SERIES 4 — GAS-FIRED WATER BOILER — Boiler Manual
15
Venting — Direct exhaust — components3c
Obtain vent system components
1. The following special gas vent systems comply with UL-1738
and ULC-S636 standards and are certified by CSA as the only
systems suitable for use with CGi boilers (all 3” diameter):
• Heat-Fab, Inc.
Saf-T Vent
®
• Flex-L International, Inc. StaR-34
• Z-Flex®, Inc. Z-Vent II
• ProTech Systems FasNSeal™
Use only the vent starter of the same manu-
facturer as the vent components. Do not mix
components from different systems. The vent
system could fail, causing flue gas spillage,
resulting in severe personal injury or death.
2.
Select vent method based on page 14 and installation requirements.
3. Refer to Table 4 for maximum vent run lengths and number
of elbows. Do not exceed data in Table 4.
4. Select vent components from separate
CGi, & GV Vent
Component Supplement
. All components, including the
vent starter, must be of the same vent manufacturer. Do not
mix components.
Massachusetts installations
(a) For all side wall horizontally vented gas fueled equipment installed
in every dwelling, building or structure used in whole or in part
for residential purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust vent termination is
less than seven (7) feet above finished grade in the area of the vent-
ing, including but not limited to decks and porches, the following
requirements shall be satisfied:
1. INSTALLATION OF CARBON MONOXIDE DETECTORS.
At the time of installation of the side wall horizontal vented gas
fueled equipment, the installing plumber or gas fitter shall ob-
serve that a hard wired carbon monoxide detector with an alarm
and battery back-up is installed on the floor level where the gas
equipment is to be installed. In addition, the installing plumber
or gas fitter shall observe that a battery operated or hard wired
carbon monoxide detector with an alarm is installed on each
additional level of the dwelling, building or structure served by
the side wall horizontal vented gas fueled equipment. It shall be
the responsibility of the property owner to secure the services of
qualified licensed professionals for the installation of hard wired
carbon monoxide detectors
a. In the event that the side wall horizontally vented gas
fueled equipment is installed in a crawl space or an attic,
the hard wired carbon monoxide detector with alarm
and battery back-up may be installed on the next adja-
cent floor level.
b. In the event that the requirements of this subdivision
can not be met at the time of completion of installa-
tion, the owner shall have a period of thirty (30) days to
comply with the above requirements; provided, however,
that during said thirty (30) day period, a battery oper-
ated carbon monoxide detector with an alarm shall be
installed.
2. APPROVED CARBON MONOXIDE DETECTORS. Each
carbon monoxide detector as required in accordance with the
above provisions shall comply with NFPA 720 and be ANSI/
UL 2034 listed and IAS certified.
3. SIGNAGE. A metal or plastic identification plate shall be perma-
nently mounted to the exterior of the building at a minimum
height of eight (8) feet above grade directly in line with the ex-
haust vent terminal for the horizontally vented gas fueled heating
appliance or equipment. The sign shall read, in print size no less
than one-half (1/2) inch in size, “GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS.”
4. INSPECTION. The state or local gas inspector of the side
wall horizontally vented gas fueled equipment shall not ap-
prove the
installation unless, upon inspection, the inspector observes
carbon monoxide detectors and signage installed in accor-
dance with the provisions of 248 CMR 5.08(2)(a) 1 through 4.
(b) EXEMPTIONS: The following equipment is exempt from
248 CMR 5.08(2)(a)1 through 4:
1. The equipment listed in Chapter 10 entitled “Equipment Not
Required To Be Vented” in the most current edition of NFPA 54
as adopted by the Board; and
2. Product Approved side wall horizontally vented gas fueled
equipment installed in a room or structure separate from the
dwelling, building or structure used in whole or in part for
residential purposes.
(c) MANUFACTURER REQUIREMENTS — GAS EQUIPMENT
VENTING SYSTEM PROVIDED. When the manufacturer of
Product Approved side wall horizontally vented gas equipment pro-
vides a venting system design or venting system components with
the equipment, the instructions provided by the manufacturer for
installation of the equipment and the venting system shall include:
1. Detailed instructions for the installation of the venting sys-
tem design or the venting system components; and
2. A complete parts list for the venting system design or venting
system.
(d) MANUFACTURER REQUIREMENTS — GAS EQUIPMENT
VENTING SYSTEM NOT PROVIDED. When the manufacturer
of a Product Approved side wall horizontally vented gas fueled
equipment does not provide the parts for venting the flue gases,
but identifies “special venting systems”, the following requirements
shall be satisfied by the manufacturer:
1. The referenced “special venting system” instructions shall
be included with the appliance or equipment installation
instructions; and
2. The “special venting systems” shall be Product Approved by
the Board, and the instructions for that system shall include
a parts list and detailed installation instructions.
(e) A copy of all installation instructions for all Product Approved side
wall horizontally vented gas fueled equipment, all venting instruc-
tions, all parts lists for venting instructions, and/or all venting design
instructions shall remain with the appliance or equipment at the
completion of the installation.
Max. vent
length (feet)
Total number of elbows (Note 1)
123456
CGi-25 to CGi-6 55 48 41 34 27 20
CGi-7 35 28 21 14 7 --
CGi-8 28 21 14 7 -- --
Note 1:
*
Table 4 Maximum vent length