Thermal Solutions EVCA SERIES Installation, Operating And Service Instructions page 11

ii. Minimum three (3) feet above any forced air inlet
located within ten (10) feet of the vent termination.
iii. Minimum four (4) feet below, four (4) feet
horizontally or one (1) foot above any door, window or
gravity air inlet.
iv. Minimum four (4) feet horizontally from electric
meters, gas meters, regulators and relief valves. This
distance may be reduced if equipment is protected from
damage due to condensation or vapor by enclosure,
overhangs, etc.
v. Minimum twelve (12) inches from corners of
building.
s. Use appropriately designed thimbles when passing
through combustible walls or roofs.
t. Install fire-stops where vent passes through floors,
ceilings or framed walls. The fire-stop must close the
opening between the vent pipe and the structure.
u. Enclose vent passing through occupied or unoccupied
spaces above the boiler with materials having a fire
resistance rating at least equal to the rating of the
adjoining floor or ceiling. Maintain minimum clearance
to combustible materials.
v. Locate vent terminal above combustion air intake
terminal (if used) and no closer than one (1) foot
horizontally.
w. Vertical venting requires flashing and a storm collar to
prevent moisture from entering the structure.
x. Vertical vent termination must be at least two (2)
feet plus the expected snow accumulation above roof
penetration height.
2. General Guidelines
a. This boiler has been certified with AL29-4C® venting.
Select a vent material that is approved for use with
condensing flue gasses.
b. Install vent system before installing air intake, water, gas
or electrical connections.
c. For instances where the vent system manufacturer's
instructions do not make a specification, refer to the
below points.
i. Make sure pipe and fittings are clean by swabbing
with alcohol. Use Dow Corning 736 or 732 RTV,
Polybar #500 RTV or Sil-bond 4500 or 6500 to seal vent
pipe.
ii. Refer to the appropriate drawings in this section
of this manual to determine common acceptable
configurations of venting system.
3. IMPORTANT
The Commonwealth of Massachusetts requires
compliance with regulation 248 CMR 4.00 and 5.00 for
installation of side-wall vented gas appliances as follows:
(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 venting, 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 gasfitter shall observe 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 gasfitter 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
adjacent floor level.
b. In the event that the requirements of this
subdivision can not be met at the time of completion of
installation, 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 operated 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
permanently mounted to the exterior of the building at a
minimum height of eight (8) feet above grade directly in
line with the exhaust 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".
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