| Multi-circuit
DEFROST
CONTROLS PRECISION
5000 Series |
| Specifications |
| Time
Cycle: |
Adjustable
in 2-minute increments from 2 to 120 minutes. |
| Motor: |
Synchronous
type, completely sealed and lubricated |
| Motor
Power: |
4
watts |
| Motor
Temperature
Range: |
(ambient):
35°F to 175°F. |
| Base:
|
All
steel construction, 16
gauge channeled steel.
zinc plated for corrosion
resistance and durability. |
| Mounting: |
See
left. |
| Contact
Transfers: |
Maximum
number of con
tact transfers per 24-hour
period for each program
imer is 64 (8 switch unit)
or 32 (4 switch unit). |
| Terminals: |
1/4
inch male quick
connect (standard). |
|
|
This
accurate, multi-circuit timing device can individually operate from
one to 24 switches. It is designed to control a series of operations
with a variable time sequence, such as a refrigeration defrost cycle.
Built with positive snap-action switches to provide positive and
immediate switching. this field-adjustable defrost control combines
ease of programming with accuracy and reliability.
• The 5000 Series provides a
high level of adjustment flexibility. The basic units are with either
four or eight sequentially programmed SPDT, 15 amp., cam-operated
switches. It differs from common multi-circuit controls in that
each switch is independently controlled by the combined action of
two separate time shafts. This arrangement makes it possible to
combine extremely short “on” periods with extremely
long “off” periods, such as a two-minute “on “
period once a day.
• Switches can be cycled independently
at selected times for independently adjusted “on” periods.
For example, one switch can be adjusted to operate eight times a
day, with a 10-minute “on” period. Each switch is actuated
by an individually adjustable cycle timer consisting of a cam assembly
with a drive gear designed to rotate one revolution at relatively
high speed and stop, giving one cycle to the switch. Each cycle
timer is initiated by an individual program timer which rotates
at the relatively slow speed of one revolution per 24 hours and
includes a molded dial with slots into which trippers can be inserted.
In operation, a tripper in the program timer starts the cycle timer,
which then goes through one cycle and comes to rest. Placement of
the trippers determines when “on” periods occur. Adjustment
of the cycle timer determines the length of the “on”
periods.
• The 5000 Series defrost control
is available as a master unit with a synchronous drive motor and
either four or eight individually controlled switches—or as
a slave unit (without a motor) of either four or eight individually
controlled switches. Up to 24 switches can be operated by combining
slave units with just a single master unit.
• Master units have one industrial-duty
synchronous motor that is designed for long life. |
