Nor-Lake Capsule Pak Refrigeration Systems - Manual (Page 17)

07/14 Rev. H 040086 17
opeRation
StandaRd tempeRatuRe (CooleR) SyStemS
The automatic air defrost Capsule Pak™ Refrigeration System for coolers is a basic, unitized refrigeration system.
The system is designed to provide normal storage temperatures in a Kold Locker™ Walk-in with a minimum of
effort during initial installation. The system consists of a complete condensing unit, an evaporator coil, a method
for controlling the temperature, and a time switch for setting "off cycle" defrost.
Important: It is the installing contractor’s responsibility to check the operation upon start-up and make necessary
temperature control or thermal expansion valve adjustments as required for proper operation.
Note: Capsule Pak™ Refrigeration Systems that are designed for outdoor installation will be fitted with electric
crankcase heaters, electrically heated condensate drain tubes, automatic head pressure control valve, and the
"pump-down cycle".
Refrigeration Controller
Capsule Pak™ refrigeration systems may be equipped with either a conventional temperature thermostat or an
electronic programmable temperature control. See page 19 for the operation of a conventional control or see
separate instructions on the operation of the electronic temperature control.
Defrost Cycle (Cooler System)
The purpose of the defrost cycle is to allow time for any frost formed on the evaporator to melt and clear from the
surface. The time clock stops the condensing unit. During this time, the evaporator fans continue to run, blowing
+35-38˚F air over the fins. This process will warm the evaporator above
+32˚F. After 15 minutes, the condensing unit should restart.
Note: Some models may have a programmable controller used in place of the Time
Clock. This unit is used to control the time and duration of the defrost. Please see the
separate instructions that are included for the operation of this control.
Time Clock
The time clock used to control the defrost cycle has been factory preset. However,
please refer to the following instructions on the operation of the time clock if an
adjustment is ever needed. Note: The cooler time clock is factory set for a 15 minute
defrost every 3 hours.
Time Clock Adjustment
The 24-hour dial has quarter-hour divisions and AM/PM indications. The time switch is set by pushing the
captive trippers to the outer ring position for the entire period that the load is to be turned "on", i.e. fifteen minutes
for each tripper on the 24-hour dial. When the tripper is pushed to the inside, the switch is in the "off" position. (It
is not recommended for the cooler to have defrosts longer than 15 minutes.)
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peratiOn