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True Food Service Equipment, Inc.
15
15
INSTALLATION / OPERATION INSTRUCTIONS
FREEZERS DEFROST TIME CLOCK
OPERATION (Grasslin Timer)
RECOMMENDED DEFROST
SETTINGS:
True Manufacturing has factory set your
defrost time clock to a recommended time
and duration defrost scenario. All refrig-
eration equipment operating below 30°F
will accumulate frost on the evaporator
coil and will require routine defrost. Your
True equipment has been designed for three
defrost periods (6:00 a.m., 2:00 p.m. and
10:00 p.m.). If you decide to deviate from
these defrost time settings please follow the
procedures for adjustment below.
REQUIRED TOOLS:
• Phillips Screwdriver
• 1/4” Nut Driver or Socket
Locating The Defrost Timer:
Take off the timer box lid by removing four
(4) corner screws.
Single Door Models:
Defrost timer is located in top of the cabinet
in the timer box connected to the evaporator
housing.
Two Door Models:
Defrost timer is located in top of the cabinet
in timer box connected to the evaporator
housing.
Three Door Models:
Defrost timer is located on top and right-
hand side of the cabinet. The timer is in
the timer box connected to the side of the
condenser housing.
Setting the timer:
(UNPLUG UNIT FROM
POWER SUPPLY!)
DO NOT SET THE TIME BY
ROTATING THE “OUTER” DIAL.
Turn the minute hand clockwise until the
time of day on the outer dial is aligned with
the triangle marker on the inner dial (two
o’clock position).
Adjusting The Defrost Timer:
(time initiated, time or temperature termi-
nated)
Your True freezer contains a defrost system
that is temperature terminated, however the
time clock has been designed with a time
termination back-up so that the defrost peri-
od will not exceed thirty minutes. While
True requires a minimum 3 defrost periods
not to exceed 30 minutes the procedure on
this page should be followed to customize
your specific needs.
Notice:
If timer is not set for a minimum of 3
defrost per day for 30 minutes each, the coil
may develop excessive frost. This may lead
to system failure and product loss, which is
not covered under warranty.
The following procedure may be fol-
lowed to customize your needs.
High usage, high temperature, and
high humidity may require 4 defrost
settings per day.
WARNING:
Always follow the manufactur-
er’s recommended settings when
programming the amount and duration
of the defrost cycles.
STEP 1
The white tabs located on the outmost area
of the time clock have been factory set
for (6:00 a.m., 2:00 p.m., and 10:00 p.m.).
Each tab represents 15 minutes of defrost
time. Notice that at each defrost time two
white tabs are set for 15 minutes each for a
total of 30 minutes of defrost.
STEP 2
In order to program the time to begin the
defrost cycle, flip the white tabs out to set
the defrost time. To eliminate a defrost
time flip the white tabs back toward the
center of the Defrost Timer.
STEP 3
True recommends a 30 minute defrost cycle
three times per day.
Inner most dial.
Time of day.
Outer most dial. White tabs represent 15
minutes of defrost time.
Defrost Timer Box Image 1
Defrost Timer Image 2