[
Electric infrared heater]
Thermostat
Unit thermostat
[
Infrared heater thermostat]
SD-10 Operation and Maintenance Data
Electric [unit] [and] [cabinet] heaters, Data Package 5
Electric [baseboard] [sill] [pedestal] units, Data Package 5
[
Electric infrared heater, Data Package 5]
Submit in accordance with Section 01781 OPERATION AND
MAINTENANCE DATA.
PART 2
PRODUCTS
2.1
ELECTRIC [UNIT] [AND] [CABINET] HEATERS
UL 1025; wattage, voltage, phase, number of steps, watts Btu/hrand cubic
meter per second CFM as indicated. Provide control-circuit terminals and
single source of power supply. Heaters 5 Kw and larger shall be 3-phase,
with load balanced on each of the three phases. Limit leaving air
temperature to 60 degrees C 140 degrees F with entering air of 15 degrees C
60 degrees F.
[2.1.1
Enclosure
**************************************************************************
NOTE: UL 1025 provides enclosure construction
requirements that are adequate for installation in
ordinary locations. Use this paragraph for heaters
to be located in areas where the heater may be
subject to abuse.
**************************************************************************
Minimum [20] [_____] gage steel.
]2.1.2
Heating Element
Nickel chromium heating wire element, free from expansion noise and 60 Hz
hum. Embed element in magnesium-oxide insulating refractory. Seal element
in high-mass steel or corrosion-resisting metallic sheath with fins.
Enclose element ends in terminal box. Provide not more than six fins per
25 mm inch. Limit fin surface temperature 285 degrees C 550 degrees F at
any point during normal operation.
2.1.3
Controls
Include limit controls for overheat protection of heaters. For remote
thermostatic operation, provide contactor rated for 100,000 duty cycles.
[Provide a control transformer to supply 120-volt thermostat control
circuit for each heater.]
SECTION 15768N
Page 6
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