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Model HMI-103/105
3-5. OPERATING CONTROLS
FIG. NO. ITEM NO. DESCRIPTION FUNCTION
3-1 1 Contactor The relay that directs power to the heaters
3-1 2 Air Heaters Located in the base of the unit, and regulated
by an infinite switch
3-2 3 High Limit Thermostat A safety device in case of overheating,
mounted to the base, behind the control panels
and access panels
3-3 4 Radiant Heaters Short tubular heaters mounted in reflectors
in ceiling panel
3-3 5 Light Bulbs A 60 watt rated bulb that is Teflon coated
3-3 6 Lamp Socket A high temperature ceramic socket for holding
the light bulb
3-4 7 Power Switch Used to turn on the light bulbs
3-4 8 Radiant Heat and Air A time proportioning controller; the higher the
Heat Infinite Regulator number setting means the radiant heat will be on
a greater percentage of time
3-4 9 Fuse Holder A protective device for the lighting and heating
circuit; the fuse is a 15 amp rating and must be
replaced by a fuse of the same size and rating
3-5 10 Cooling Fan Maintains cooler metal surface temperatures
3-6 11 Manual Reset Shuts off the heat if a cooling fan fails; the
High Limits access panel must be removed and the high
limit manually reset
203 3-3