b.
When thermostat is in "COOL" position with fan selector switch in
"ON" position, compressor, and condenser fan shall cycle together
and evaporator fan shall run continuously.
2.5.13.2
a.
When thermostat is in "HEAT" position with fan selector switch in
"AUTO" position, heater and supply air fan shall cycle together.
Provide a separate thermostat to keep the fan running until the
heater cools.
b.
When thermostat is in "HEAT" position with fan selector switch in
"ON" position, heater shall cycle and supply air fan shall run
continuously.
2.5.13.3
Supply Air Fan
a.
When fan selector switch is in "AUTO" position with thermostat in
"OFF" position, fan shall not run.
b.
When fan selector switch is in "ON" position, fan shall run
continuously.
2.6
FILTERS
Provide filters to filter outside air and return air and locate [as
indicated] [inside air conditioners] [inside filter box] [inside
combination air filter mixing box]. Provide [replaceable (throw-away)]
[high efficiency] [cleanable (reusable)] type. Filters shall conform to UL
900, [Class 1] [or] [Class 2]. Polyurethane filters shall not be used on
units with multiframe filters.
2.6.1
Replaceable Type Filters
ASTM F 1040 throw-away frames and media, standard dust holding capacity,
1.79 m/s 350 fpm maximum face velocity, and [25 mm one inch] [50 mm 2 inches
] thick.
2.6.2
High Efficiency Filters
Filters shall have a mean efficiency of [_____] percent when tested in
accordance with ASHRAE 52.1. Filter assembly shall include; holding frame
and fastener assembly, filter cartridge, mounting frame, and retainer
assembly. Reinforce filter media with glass fiber mat. Pressure drop
across clean filter shall not exceed [_____] Pa inches of watergage.
Precede high efficiency filters with a UL Class 2 replaceable type filter.
2.6.3
Cleanable Type Filters
ASTM F 872, Type II, UL Class 2. Provide sufficient oil to coat filters
six times based on one pint of oil per each 0.93 square meter 10 square feet
of filter area. Provide washing and charging tanks for cleaning and
coating filters.
2.6.4
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NOTE: Prohibit the use of mercury as the operating
fluid when air handling units are to be in areas
SECTION 15730N
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