Type 1 enclosure with operating range specified or indicated.
Circuits
shall be as required for the applicable functions.
2.10.5.1
Air Flow Switch
Air flow switch shall have a service pressure range of 31 to 2542 Pa 0.12
to 10 inches wg.
2.10.5.2
Water-Flow Switch
Water flow switch shall have a body rating suitable for the service,
field-adjustable activating flow rate, and a pressure drop not in excess of
13.8 kPa 2 psi at maximum flow rate.
2.10.5.3
Pressure Switch
Pressure switch shall be factory set, one or two stage as indicated, with
adjustable operating and differential pressure. Bourdon tube inlet shall
be fitted with damper screw adjustment.
2.10.5.4
Differential Pressure Switch
Differential pressure switch shall be factory set, provided with high and
low sensing ports, one or two stages and adjustable differential range and
pressure.
2.10.5.5
Temperature Switch
Temperature switch shall be factory set, provided with [capillary] [armored
capillary] tubing and filled sensing system, one or two stages as
indicated, and operating adjustable differential range. For immersion
service, thermal wells shall be provided.
2.10.5.6
Differential Temperature Switch
Differential temperature switch shall be factory set, provided with two
[separate] [separate armored] capillary systems, one or two stages, and
adjustable differential range and temperature. For immersion service,
thermal wells shall be provided.
2.10.6
Push-Button Stations
Stations shall be NEMA Class 12 oil-tight, momentary or maintained-contact
type, as indicated. Start push-buttons shall have a fully guarded or flush
black operator button. Stop push-buttons shall have an unguarded or
extended red operator button.
2.10.7
Selector
Switches shall be NEMA Class 12 oil-tight, momentary or maintained contact
type, as indicated, with standard operator.
2.11
HEAT RECOVERY DEVICES
2.11.1
Heat Recovery Coil, Air
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NOTE: When coils are located in a corrosive or
salt-laden environment, require both the copper or
SECTION 15652A
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