2-4
R
efRIgeRatIon
/ e
lectRIcal
P/N 0515388_L
U.S. & Canada 1-800-922-1919 • Mexico 01-800-890-2900 • www.hussmann.com
REFRIGERATION THERMOSTAT
The bulb for the optional refrigeration thermo-
stat is located approximately 12 in. (305 mm)
above the coil and 6 ft (1829 mm) from the
left-hand end (facing front) of the merchan -
diser. The optional refrigeration thermostat is
located 3
1
/
2
ft (1067 mm) from the left-hand
end, just past the raceway. On wide island
models, the thermostat body is located on the
serial plate side (front) of the merchandiser.
DEFROST TERMINATION
THERMOSTAT
The standard disc type defrost termination
thermostat is not adjustable. This thermo-
stat is clamped to the suction line of the
coil on the left-hand (facing front) end of
the merchandiser.
E-Plus
models do not use a defrost termi-
nation thermostat and are to be time
terminated only.
DEFROST SEQUENCES
These merchandisers require defrost cycles
for proper operation. Refer to the data
sheets for application data.
The Time Clock initiates defrost. The
evaporator fans continue to circulate air across
the evaporator coil, melting any frost build-up.
Defrost can be terminated by either tempera-
ture or time.
Temperature Termination
Temperature termination should be used for
the following types of installations:
1. Parallel systems with EPRs or suction stop
solenoids
2. Single compressor units without pump-
down cycle.
Time Termination
Time termination should
be used for the following
types of instal lations:
1. All E-Plus models;
2. Parallel systems with
thermostat and liquid
solenoid; and
3. Single compressor
units with pump-down.
To use time termination,
simply do not wire the
termination thermostat.
Optional Refrigeration
Thermostat Bulb
6 ft (1829 mm)
12 in. (305 mm)
Optional
Refrigeration
Thermostat
Standard
Defrost
Termination
Thermostat
3.5 ft (1069 mm)