7
ELECTRICAL –
•
Self-Contained Model Installation – M er-
chandisers need only to be connected to a
120V / 60 hz electrical supply., and are sup-
plied with a 20 amp cord.
•
Post Construction Clean-up – After the first
two weeks of a major store remodel or new
store operation, the grill should be removed
and the condensing unit and condenser face
cleaned due to the accumulated dirt and d e-
bris generated during construction.
•
Remote Model Installation – Connections –
All wiring must be in compliance with NEC
and local codes. Electrical connections for
refrigerated models are made in the electri-
cal box on the back of the case behind the
rear close-off panel.
•
Field Wiring – Field wiring must be sized
for components amperes stamped on the s e-
rial plate. Actual ampere draw may be less
than specified. Always check the serial
plate.
Evap Fan
Light
Condensate Condensing
Minimum
Fuse
Model
Amps
Amps
Pan Amps Unit Amps
Circuit
Amps
Amps
Refrigerant ( * )
R-22
R-404A
R-22
R-404A
MBC24-3661/74
0.38
0.15
5.0
10
9.2
16
14
20
MBC24-3684
0.38
0.35
5.0
10
9.2
16
14
20
MBC243661R/74R
0.38
0.15
N/A
N/A
N/A
15
15
15
MBC243684R
0.38
0.35
N/A
N/A
N/A
15
15
15
MBC24-4861/74
0.57
0.20
5.0
10
10.1
16
16
20
MBC24-4884
0.57
0.44
5.0
10
10.1
16
16
20
MBC244861R/74R
0.57
0.20
N/A
N/A
N/A
15
15
15
MBC244884R
0.57
0.44
N/A
N/A
N/A
15
15
15
Check Serial Plate for Refrigerant type and amount used. Self-Contained cases were changed from R-22 to
R-404a starting September, 2001.
REFRIGERATION –
Expansion Valve Adjustment
Expansion valves must be adjusted to fully feed the evaporator. To achieve the
proper setting, the merchandiser must first have been in operation long enough to have
reached the approximate intended operating temperature. Air flow should not be
restricted by heavy frost formation on the evaporator. Adjust valves as follows:
