TEMPERATURE CONTROLS/ THERMOMETER/TIMERS
Contents
1. TEMPERATURE CONTROLS THERMOMETER TIMERS NOTES TEMPERATURE CONTROLS THERMOMETER TIMERS Timer Adjustments TRUE TECHNICAL SERVICE MANUAL ALL MODELS WWW TRUEMFG COM DEFROST TIME CLOCK OPERATION WITH THE EXCEPTION OF THE T 19F T 19FZ T 23F GRASSLIN DEFROST TIMER OPERATION INSTRUCTIONS RECOMMENDED DEFROST SETTINGS 1 Defrost Timer Box True Manufacturing has factory set your defrost time clock to a recommended time and duration defrost scenario All refrigeration equipment operating below 30 F will accumulate frost on the evaporator coil and will require routine defrost Your True equip ment 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 Tools Required e Phillips Screwdriver 1 4 Nut Driver or Socket Locating The Defrost Timer Take off louvered grill assembly by removing four 4 corner screws Single Door Models Defrost timer is located in the lower right corner behind the louvered grill inside galva nized electrical box Two Door Models 2 Defrost Timer Defrost timer is located in the middle of the cabinet behind the louvered grill Timer is mounted to the left of the centered ballast box Inside of gray timer box Three Door Models Defrost timer is located on the left upright post behind the louvered grill Inside of gray ti2. 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 and adjustment below Tools Required e Slotted Screwdriver Locating The Defrost Timer Take off lower grill assembly by removing four 4 corner screws Graduated Adjusting Time Disk Knob y Time Single Door Models Indicator Defrost timer is located in the lower right corner behind the louvered grill Duration Indicator Two Door Models Defrost timer is located in the middle of the cabinet behind the louvered grill Timer is mounted to the left of the centered ballast box Three Door Models Defrost timer is located on the left upright post behind the louvered grill Adjusting The Defrost Control time initiated temperature terminated Mr STEP Referencing the outer graduated time disk position the Your True freezer contains a defrost system that is tem current time of day to align with the TIME indicator To move perature terminated however the time clock has been the graduated time disk grasp the adjusted knob and turn counter designed with a time termination back up so that the clockwise until the current time of day aligns with the TIME indicator defrost period will not exceed twenty minutes While True recommends 3 defrost periods not to exceed 30 minutes the procedure below should be followed to customize your specific needs STEP 2 In order to program th
3. e time to begin the defrost cycle insert threaded trip pins into the graduated time disk hole that corresponds to your customized defrost needs WARNING STEP 3 True recommends a 30 minute defrost cycle three times per Always follow the manufactures recommended day Changing the recommended duration requires pressing down and settings when programming the amount and sliding the copper duration indicator duration of the defrost cycles 150 TRUE DEFROST CONTROLS OPERATION INSTRUCTIONS 2 TIME INITIATED TIME TERMINATED Like in the time initiated temperature terminated controls these systems have a temperature sensor that will disconnect the heaters to keep the cabinet from over heating However it won t restart the freezing cycle until the contro completes the factory set time These systems are also equipped with temperature sensors to de lay the fan motors once the defrost cycle has been completed to prevent the circulation of warm air inside the cabinet Actuating Gear To adjust the defrost cycle time there is only one possible adjust ment Once the cabinet has reach the design temperature pick the time of the day that you want the unit to defrost Turn the actuat ing gear clockwise until the contacts change position initiating the defrost cycle 2 Heater Line 4 Temp Control Fan Delay 3 Neutral Note Older version timers had terminals and 3 reversed 15 TRUE 152
4. mer box Setting the timer UNPLUG UNIT FROM POWER SUPPLY Uj 4 ites V y DO NOT SETTHETIME BY ROTATING THE OUTER DIAL 4 KUIN 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 See image 2 Inner Time of Outer most dial most dial day White tabs represent 15 minutes of defrost time 148 TRUE Adjusting The Defrost Timer time initiated time or temperature terminated 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 period will not exceed thirty minutes While True requires a minimum 3 defrost periods not to exceed 30 minutes 2 tabs the procedure on this page should be followed to customize your specific needs The T 19F T 19FZ T 23F will have 4 defrost per day for 15 minutes I tab each Factory setting 2 am 8 am 2 pm 8 pm 15 minutes in length The following procedure may be followed to customize your needs High usage high temperature and high humidity may require 4 defrost settings per day STEP 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 minute
5. s 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 2 tabs defrost cycle three times per day NOTICE If timer is not set for a minimum of 3 defrost per day for 30 minutes 2 tabs each the coil may develop excessive frost This may lead to system failure and product loss which is not covered under warranty WARNING Always follow the manufacturers recommended settings when programming the amount and duration of the defrost cycles Grasslin Timer Configuration 1 Line black wire 2 Line if jumper installed tan or black wire F Normally closed contact temp control red wire 3 Normally open contact defrost heater pink wire 4 Normally closed contact door switches tan or black wire N Neutral white wire X Defrost termination purple wire DISCLAIMER Wire colors are subject to change 149 TRUE DEFROST TIME CLOCK ADJUSTMENT PARAGON DEFROST TIMER OPERATION INSTRUCTIONS RECOMMENDED DEFROST SETTINGS True Manufacturing has factory set your defrost time clock to a recommended time and duration defrost scenario All refrigeration 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
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