3.1.1
Furnaces
Foundations, settings, or suspensions for mounting equipment and
accessories including supports, vibration isolators, stands, guides,
anchors, clamps, and brackets shall be provided. Foundations and
suspension for equipment shall conform to the recommendations of the
manufacturer, unless otherwise indicated on drawings. Anchor bolts and
sleeves shall be set accurately using properly constructed templates.
Anchor bolts, when embedded in concrete, shall be provided with welded-on
plates on the head end and guarded against damage until equipment is
installed. Equipment bases shall be leveled, using jacks or steel wedges,
and when resting on concrete shall be neatly grouted-in with a nonshrinking
type of grout. Equipment shall be located as indicated and in such a
manner that working space is available for all necessary servicing, such as
shaft removal, replacing, or adjusting drives, motors, or shaft seals, air
filters, access to automatic controls, humidifiers, and lubrication.
Electrical isolation shall be provided between dissimilar metals for the
purpose of minimizing galvanic corrosion. The interior of cabinets or
casings shall be cleaned before completion of installation. The furnace
shall be connected to the vent or chimney with the specified connectors,
draft regulators, draft loads, and induced draft fans, as applicable, in
accordance with NFPA 211.
3.1.2
Automatic Vent Dampers
Automatic vent dampers shall be installed in accordance with ANSI Z21.66.
3.1.3
Humidifiers
Humidifiers shall be installed in accordance with manufacturer's
instructions and in an arrangement that will permit access and ease of
maintenance. Piping, draining, manual shut-off valve, and solenoid valves
when required for type of humidifier furnished shall be provided. Drain
lines shall be provided for humidifiers and shall be piped to drains shown.
Humidifiers installed in a bypass arrangement shall be provided with an
integral damper that can be conveniently operated to regulate or shut off
flow through the humidifier. To permit humidifier operation, a manual
ON-OFF switch shall be provided near the humidifier. The ON-OFF switch may
be integral with the humidifier. When humidifier is installed in glass
fiber ductwork, ductwork shall be adequately reinforced to support the
humidifier.
3.1.4
Access Panels
Access panels shall be provided for concealed valves, vents, controls,
dampers, and items requiring inspection or maintenance. Access panels
shall be of sufficient size and so located that the concealed items may be
serviced and maintained or completely removed for replacement. Access
panels shall be as specified in Section 05500A MISCELLANEOUS METAL.
3.1.5
Flexible Connectors
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NOTE: Flexible connectors will be provided where
required to absorb expansion and contraction,
isolate vibration, absorb noise, compensate offset
motion, absorb continuous flexing, and relieve
equipment from piping stresses. Where flexible
SECTION 15566A
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