Hussmann VRL Installation & Operation Manual page 32

E
32
lEctrIcal
Model Product Application
VRL1B1A Frozen Food - DOE
VRL2B1A Frozen Food - DOE
VRL3B1A Frozen Food - DOE
Notes *** :
1) Controller Set point from factory is - 8 °F for VRL1B1A
2) Controller Set point from factory is - 10 °F for VRL2B1A.
3) Controller Set point from factory is - 10 °F for VRL3B1A.
4) The controller set poing range listed in the table above may be required when you are evaluated the product under ASHRAE 72 - FF DOE conditions to
Hussmann Controller Operation RTN
The Controller controls refrigeration temperature. This is factory installed in the control panel. Defrosts
are time initiated and temperature terminated for self contained. The defrost setting is factory set
as shown above. To ensure a thorough defrost, defrost must be terminated by the temperature
termination setting — not by time.
LOAD LIMIT LINE
SECTION A-A
PN_3155541_E
/ r
EfrIgEratIon
Discharge Air Temperature
( Refrigeration Mode )
0 *** -10 to -8 ° F ( - 23 to - 22 ° C )
´-7 to 2 ° F (-21 to -16 ° C ) *** -10 to -8 ° F ( - 23 to - 22 ° C )
´-7 to 2 ° F (-21 to -16 ° C ) *** -10 to -8 ° F ( - 23 to - 22 ° C )
Discharge Air Temperature
Model Product Application
VRL1B1A Frozen Food - DOE -10 to 0 ° F (-23 to -17 ° C )
VRL2B1A Frozen Food - DOE -7 to 2 ° F (-21 to -16 ° C )
Notes *** :
1) Controller Set point from factory is - 8 °F for VRL1B1A
2) Controller Set point from factory is - 10 °F for VRL2B1A.
3) The controller set poing range listed in the table above may be required when you are evaluated the product under ASHRAE 72 - FF DOE conditions to achieve IAT 0 °F.
VRL1B1A - Discharge Air Temp Sensor ( ° F ) @ 75 °F 55 % RH ( DOE )
30
25
20
15
10
5
0
-5
-10
54.75
The graph shows what the discharge air sensor is reading. The case controller is
pre-programmed from the factory with a set point of -8° F. This merchandiser
holds product in all locations between 7° F and -6° F (evaluated under ASHRAE
72 method).
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES.
THIRD
ANGLE
PROJECTION
P/N
SHEET 3 OF 12
U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com
/ c
ontrollEr
Controller Set Point Defrost Frequency
Range ( ° F )
Controller Set Point
( Refrigeration Mode ) Range ( ° F )
*** -10 to -8 ° F ( - 23 to - 22 ° C )
*** -10 to -8 ° F ( - 23 to - 22 ° C )
R
REV
Type of Temp.
( per day ) Defrost Termination
3 Hotgas 55 ° F ( 12 ° C )
3 Hotgas 47 ° F ( 8 ° C )
3 Hotgas 60 ° F ( 15 ° C )
Defrost Frequency
( per day )
3
3
Failsafe
Time ( min )
50
40
40
Temp. Failsafe
Type of Defrost
Termination time ( min
Hotgas 55 ° F ( 12 ° C ) 50
Hotgas 47 ° F ( 8 ° C ) 40