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4. CASE SETTINGS
a. Defrost –
IMPORTANT! – THE SUPPLIED CASE CONTROLLER WILL CONTROL DEFROST
AND IS PROGRAMMED AT THE FACTORY WITH THE SETTINGS BELOW.
This case does
not need a defrost from the rack. A rack defrost will lead to erratic operation and
potential loss of product.
i. Danfoss controller defrost frequency (d03):
8 hours
ii. Danfoss controller defrost duration (d04):
30 minutes
b. Discharge air (for reference)
i. 30-32° (in type M ambient conditions 68° DB, 50% Rh) measured 2 hours after
defrost. Will vary depending on time of measurement and actual store
conditions.
c. Superheat
i. Target 3-5° for superheat.
d. Evaporator suction temp
i.
IMPORTANT!
-
24°
. Lower temps may precipitate freeze-up of the fogger
system and degradation of case performance. Higher temps may jeopardize
product temperatures.
e. Controller setpoints are as follows:
i. Setpoint (cutout):
35°
ii. Differential (r01):
1°
NOTE: You may notice that the controller setpoint is higher than the specified discharge air temp. This is because the
controller air sensor has been placed in the return air stream under the deck pans. This was done because the fogger
spray into the discharge air confused the controller and led to erratic operation.
Figure 9: Air probe for controller setpoint located in return air stream on the primary case only.
5.
IMPORTANT! - MIATECH AQUA FOGGER CONTROLLER SETTINGS:
a. Power switch: On
b. Water pressure: 5 psi
c. Mist time: 45 seconds
d. Off time: 3 minutes
e. Heaters plugged into proper GFCI socket (labeled at Heater)
6.
REVERSE OSMOSIS FILTER
Total dissolved solids to be less than 100 PPM.
