Start Up / Operation; Controller Operation - Hussmann microSC SHM-A Series Installation & Operation Manual

P/N 3104942_B

CONTROLLER OPERATION

The electronic controller is located in the cas-
sette compartment. The controller comes factory
set, and is ready for use. The front grille must
be removed in order to access this control.
When removing the grille for this operation or
for condenser cleaning, care must be taken not
to damage the display interface cable. It may be
unplugged during this task.
1. Plug the merchandiser plug into its receptacle.
a. The controller display will illuminate.
b. The interior light will illuminate.
2. After the control preprogrammed time delay
of up to 6 minutes, the compressor and evap-
orator fan(s) will start if the control is calling
for cooling.
3. The control will cycle the compressor but
may also cycle evaporator fan(s) on and off
determined by the Set-Point and Differential
temperatures.
a. The Set-Point is the adjustable
preprogrammed temperature.
b. The Differential is the non-adjustable pre
programmed temperature.
c. The Control is designed to read and
display a cabinet temperature not a product
temperature.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

START UP / OPERATION

This cabinet temperature may reflect the re-
frigeration cycle of the Set-Point and it's Dif-
ferential. The most accurate temperature on
a cabinets operation is to verify the product
temperature.
Taking as an example a VRL case, freezer, If
the Set-Point is -12°F and the Differential is
9°F. (Set-Point) -12°F + 9 (Differential) = -3°F.
The compressor and evaporator fan(s) will cycle
off -12°F and back on at -3°F.
Main Features:
• Panel-mounted
• Energy saving algorithms and optimised de-
frost control
• 8 preloaded applications
• Defrost at single / double evaporator
• Frame Heater
• Local network auto-configuration
• Direct load connection (up to 2 HP)
• Supply voltage control LVD
• Presence of an open collector output
SHM-A Merchandisers
3-1