dry steam only to air stream. Humidifiers may be installed on single or
multiple units. All materials shall be [noncorrosive materials] [Type 300
stainless steel.]
2.6.3
Operation
Humidifier shall be controlled by a manually adjustable humidistat [located
in living spaces] [with sensing bulb in [return] [supply]]. Humidifier
shall operate when the furnace operates. Humidistat shall be calibrated in
percent relative humidity and shall be furnished by the humidifier
manufacturer.
2.7
AIR FILTERS
**************************************************************************
NOTE: Normally, replaceable type filters shall be
specified; however, permanent type filters may be
included in the project specifications provided
maintenance facilities are available for cleaning.
References to inapplicable filter types will be
deleted.
**************************************************************************
Air Filters shall be listed in accordance with requirements of UL 900.
2.7.1
Replaceable Media filters
Replaceable media filters shall be the [dry-media] [viscous adhesive] type,
of the size required to suit the application. Filtering media shall be not
less than 50 mm 2 inches thick fibrous glass media pad supported by a
structural wire grid or woven wire mesh. Pad shall be enclosed in a
holding frame of not less than 1.6 mm (16 gauge) 16 gauge galvanized steel,
and equipped with quick-opening mechanism for changing filter media. The
air flow capacity of the filter shall be based on net filter face velocity
not exceeding [1.5] [_____] m/s [300] [_____] feet per minute, with initial
resistance of [32] [_____] Pa [0.13] [_____] inches water gauge. Average
efficiency shall be not less than [_____] percent when tested according to
ASHRAE 52.1.
2.7.2
Sectional Cleanable Filters
Cleanable filters shall be [25] [50] mm [1] [2] inches thick. Viscous
adhesive shall be provided in 20 liter 5 gallon containers in sufficient
quantity for 12 cleaning operations and not less than 1 liter 1 quart for
each filter section. One washing and charging tank shall be provided foe
every 100 filter sections or fraction thereof. Each washing and charging
unit shall consist of a tank and [single] [double] drain rack mounted on
legs. Drain rack shall be provided with dividers and partitions to
properly support the filters in the draining position.
2.8
FUEL-OIL SYSTEMS
Fuel oil systems shall conform to Section 13202 FUEL STORAGE SYSTEMS.
2.9
FUEL-GAS SUPPLY SYSTEM
Fuel-gas supply system shall be as specified in Section 15190A GAS PIPING
SYSTEMS and Section 02556A GAS DISTRIBUTION SYSTEM.
SECTION 15566A
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