Summit Ice Melt Systems
PO Box 6928, Tahoe City, CA 96145
Ph: 530-583-8888 Fax: 530-583-7777
www.SummitIceMelt.com
4 CDC Controller (Cont’d.)
Operation
The 4CDC controller uses a thermistor to sense ambient temperatures. When the
temperature drops below the Heater-On set-point, the system is energized. When the
temperature rises above the Heater-On set-point, the system is de-energized.
If the temperature drops below the low-temp cutoff, the system is de-energized. When
the temperature rises above the low-temp cutoff, the system is energized.
The 3-position rocker switch allows the operator to set the system in
Automatic
,
Manual
(system is energized no matter what ambient conditions are), or
Off
mode
(center position).
Installation
The 4CDC controller has an enclosure that is 10" high, 8" wide, and 4" deep. It has a
NEMA 4/12 rating, so it may be mounted indoors or outdoors, typically near the circuit
breaker panel. Each branch circuit must be protected by a ground fault protection
device per the NEC. A 120Vac protected circuit is required to energize the controller.
The ambient sensor is mounted outdoors in a shaded location representative of
minimum ambient conditions (typically on the north side of a building), and away from
any heat source, such as direct sunlight or a utility room exhaust vent, so that the
temperature sensor gives an accurate reading of the air temperature reflective of
actual ambient conditions. The ambient sensor comes with a standard 10 ft lead, but
its range can be extended up to hundreds of feet using ordinary stranded copper wire.
Pre-Season Testing
The heater circuits may be energized and tested for proper functionality prior to the
cold weather season by simply setting the 3-position rocker switch to Manual.
Amperage readings may then be taken on each branch circuit. Amperage will depend
on ambient temperature and time. Follow heater manufacturer test procedures.
Page 19 of 29
Содержание Radiant Edge HotSlot
Страница 31: ...Notes ...