degrees C degrees F. On reduction in cooling loads, the air supply
quantity shall be gradually reduced to a fixed minimum setting. Then, the
reheat coil shall be activated in sequence to maintain thermostat setting.
2.8.6.2
Electric Coils
UL listed, factory-fabricated, electric-resistance coils, and open-type
heaters. Provide integral terminal box containing automatic reset
thermal-cutout primary safety device, load carrying heat limits or manual
reset thermal-cutout secondary safety device, and air-flow switch in
control circuit.
2.9
MOTORS AND MOTOR STARTERS
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NOTE: The motor control requirements should be
coordinated with the electrical section and will
depend on field conditions. The following types of
motor starters should be used as a guide only. When
electrical equipment is connected to heavily loaded
power circuits, the starting current may cause
excessive voltage drop.
Motor kW
Voltage
Type Starter
Up to 1/4
120
Manual
3/8 to 5 1/2
208-230
Across-the-line-magnetic
5 1/2 to 11
208-230
Across-the-line magnetic, part winding
or wye-delta
11 to 22 1/2
460
Across-the-line magnetic part winding
or wye-delta
Above 11
208-230
Part winding or wye-delta
Above 22 1/2
460
Part winding or wye-delta
Motor hp
Voltage
Type Starter
Up to 1/3
120
Manual
1/2 to 7 1/2
208-230
Across-the-line-magnetic
7 1/2 to 15
208-230
Across-the-line magnetic, part winding
or wye-delta
15 to 30
460
Across-the-line magnetic, part winding
or wye-delta
Above 15
208-230
Part winding or wye-delta
Above 30
460
Part winding or wye-delta
**************************************************************************
NEMA MG 1, NEMA ICS 2, and NEMA ICS 6, respectively, with electrical
characteristics as indicated. Motors shall be [open] [dripproof]
[totally-enclosed] [explosion-proof]. Motor starters shall be [manual]
SECTION 15720N
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