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Product Information
Helfpul Hints / FAQs
Accessories
PRODUCT INFORMATION
Chart MVE Freezer Components
Distributed by www.PrincetonCryo.com | Sales@PrincetonCryo.com | 800.232.2796
MVE Chart Tech Tips
If it is suspected that one of the electrical components is not
operating properly, an evaluation may be in order. Below is a
list of normal resistance values for select items:
Fill Valves (Dual 24VDC): 30 - 35 ohms
Fill Valve (Singular 24VDC): 60 - 70 ohms
Bypass Valve: 60 - 70 ohms
Bypass Sensor:
Room Temp: 1000 - 1100 ohms
Cryogenic Temp: 200 - 300 ohms
Humphrey 3 way: 130 - 145 ohms
Temperature Probes:
Room Temp: 1000 - 1100 ohms
Cryogenic Temp: 200 - 300 ohms
February 2014
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Summary of Contents for CHART MVE Series
- Page 1 February 2014 In This Issue Product Information MVE Chart Tech Tips Helfpul Hints / FAQs Accessories PRODUCT INFORMATION Chart MVE Freezer Components If it is suspected that one of the electrical components is not operating properly, an evaluation may be in order. Below is a...
- Page 2 Chart MVE Series and Cabinet Freezers Factory UL Approved Lid Switch, Harness, & TEC 3000 Settings Chart MVE Series and Cabinet Freezers are manufactured with an embedded lid switch (See Figure 1). There are two wiring harness variations of the lid switch.
- Page 3 Q: How is the UL-Approved harness connected at the factory? A: Chart's UL-Approved harness is hardwired in series with the fill valve circuit from the TEC 3000 main harness fill solenoid connector and to the lid switch. When the lid is opened this electrically opens the fill circuit and interrupts the fill (See Figures 5 &...
- Page 4 Q: Does the user need to do anything with the UL harness? A: No, for UL-Approved, everything is performed at the factory. A Lid Switch Harness, P/N 13701586, is included from the factory (See Figure 7). The harness is connected at pins 3 and 6 to the TEC 3000 main harness as shown in Figure 7.
- Page 5 Q: How does the fog clear harness connect? A: The UL-Approved Harness must be disconnected from the lid switch and fill solenoid. The Fog Clear Harness connects directly to the two terminals on the lid switch and to the terminating end of the lid switch harness. The fill solenoid is then connected directly to the TEC 3000 main wire harness (See Figure 9).
- Page 6 Figure 9: Optional Fog Clear Wire Harness PN 13296488 Once these connections have been established, proceed to change the Lid Switch and Fog Clear parameters on the TEC 3000. TEC 3000 Lid Switch and Fog Clear Parameter Settings Q: How does one change the parameters in the TEC 3000 to enable the lid switch and fog clear functionality? A: Navigate to the Lid Switch menu located in the ADD ON menus.
- Page 7 The TEC 3000 will alarm if the freezer lid remains open beyond the designated lid open time limit. Chart recommends changing the lid open alarm time to prevent false alarms. The maximum time can be set to 360 minutes .