Green Mountain GMHB227, Инструкция по установке, эксплуатации и обслуживанию

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6 - COMBUSTION AIR AND VENT PIPING
6.8A Indoor Air For Combustion (380 ONLY)
1.
Provisions for combustion and ventilation air to be in
accordance with the section “Air for Combustion and
Ventilation,” of the National Fuel Gas Code, ANSI Z223.1/
NFPA 54, or Clause 8.2, 8.3 or 8.4 of Natural Gas and
Propane Installation Code, CAN/CSA B149.1 (Canada), or
as determined by the authority having jurisdiction.
a. Provide make-up air where exhaust fans, clothes
dryers, and kitchen ventilation equipment interfere
with proper operation.
b. National Fuel Gas Code recognizes several methods
of obtaining adequate ventilation and combustion
air. Requirements of the authority having jurisdiction
may override these methods.
i. Engineered Installations. Must be approved by
authority having jurisdiction.
ii. Refer to National Fuel Gas Code for
requirements for louvers, grilles, screens, and
air ducts.
iii. Mechanical Air Supply. Provide minimum of 0.35
cfm per Mbh for all appliances located within
space. Additional requirements where exhaust
fans installed. Interlock each appliance to
mechanical air supply system to prevent main
burner operation when mechanical air supply
system not operating.
iv. Combination Indoor and Outdoor Air. Refer
to National Fuel Gas Code for applicable
information.
v. All Indoor Air. Calculate minimum allowable
room volume for all appliances in space. Use
a different method if minimum volume not
available.
01. Standard Method. Cannot be used if known
air infiltration rate is less than 0.40 air
changes per hour. Use equation, include
total for all appliances: Volume ≥ 50 ft3 x
Total Input [Mbh]
02. Known Air Infiltration Rate. Use equation,
include total for all appliances: Volume ≥
21 ft3/ACH x Total Input [Mbh]. Do not use
an air infiltration rate (ACH) greater than
0.60.
03. Refer to National Fuel Gas Code for opening
requirements between connected indoor
spaces.
vi. All Outdoor Air. Provide permanent opening(s)
communicating directly or by ducts with
outdoors.
01. Two Permanent Opening Method. Provide
opening commencing within 12 inches of
top and second opening commencing within
12 inches of bottom of enclosure. Refer
to National Fuel Gas Code for required
minimum free area.
02. One Permanent Opening Method. Provide
opening commencing within 12 inches
of top of enclosure. Provide minimum
clearance of 1 inch on sides/back and
6 inches on front of boiler (does not
supersede clearance to combustible
materials).
2.
The area surrounding the boiler must be clear and free
of combustible materials, gasoline, and other flammable
liquids and vapors.
3.
Combustion air must be drawn from a space free from
contamination by the following chemicals. These items
are incompatible with the materials used to construct the
boiler.
a. Chlorine or fluorine compounds. These are present in
many household products, including: water softener
salts, laundry bleaches, detergents, adhesives,
paints, varnishes, paint strippers, waxes, swimming
pool and spa chemicals, and plastics.
b. Drywall dust and other particles present during
construction or remodeling. It is recommended the
boiler intake be sealed off if the boiler will not be
used during the construction/remodeling period.
c. Do not allow the boiler to ingest fiberglass,
insulation, etc.
d. Aerosols and refrigerants of any kind.
e. Compounds which may be found in commercial
establishments, such as:
i. Hair spray and other beauty shop products.
ii. Cleaning agents used in dry cleaning facilities
iii. Chemicals used in auto body and metal working
shops
B. Ventilation and Combustion Air (380) ONLY
Provisions for combustion and ventilation air in accordance
with the section "Air for Combustion and Ventilation", of th e
National Fuel Gas Code , ANSI Z223.4/NFPA 54 or Clause 8.2,
8.3 or 8.4 of Natural Gas and Propane Installation Code , CAN/
CSA B149.1, or applicable provisions of the local building code
PN 240012369, REV A [08/31/2018]