Sanyo MDF-U500VXC - Manual (Page 6)

6 Twin Guard Series ™ -86°C Ultra-Low Freezers www.twinguardseries.com
Twin Guard ™ Dual°Cool Refrigeration System
Dual, independent refrigeration systems operate in Normal or energy-saving EcoMode™ which is selected by the user and engaged through the
LCD controller. Normal Mode is used for the strictest of GMP applications. EcoMode™ is applicable to 90-95% of applications.
Twin Guard ™ Dual°Cool Refrigeration System
Status Function Performance
System A and B ON Maximum Pull-Down and Recovery Capcity
Establishes highly uniform -86°C storage
temperature; maximizes recovery following
door openings and heat load additions
B
-86˚C
A
System A and B ON, Cycling On/Off EcoMode™
Maintains better energy management at
high or low ambient temperatures as well as
excellent top-to-bottom uniformity.
B
-86˚C
A
System A and B ON, Cycling On/Off Normal Mode
Maintains excellent top-to-bottom uniformity.
Maintains most repeatable, cycling wave form
for the strictest of GMP applications.
B
-86˚C
A
System A ON Back-Up for System B
Maintains minimum -65°C reserve
temperature
B
-65˚C
A
System B ON Back-Up for System A
Maintains minimum -65°C reserve
temperature
B
-65˚C
A
The SANYO Twin Guard Series ™ Freezer can be set for Normal or
EcoMode ™ operation. EcoMode ™ establishes an overlapping cycle to
significantly reduce energy consumption.
2 compressors are turned ON/OFF at same time
2 compressors and fan motor for each are independently controlled by SV and read AT.
Chamber
Comp A
Comp B
temp T12 on T12 off
Normal Normal
Chamber
Comp A
Comp B
temp T12 on T12 off
T2 on T2 off
Chamber
Comp A
Comp B
temp
T on T1 off T12 on T2 off T1 2 on
ECO mode ECO mode
ECO mode operation image
Pull down
Temp.
Comp A
Comp B
Stable temperature
NORMAL mode operation image
Pull down
Temp.
Comp A
Comp B
Stable temperature
This chart shows the repeatable cycling wave form of normal mode vs. eco mode.
Normal mode is for strict GMP applications.
EcoMode ™ vs. Normal Mode