Hillphoenix JNRBHSA, Руководство владельца по установке и эксплуатации

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AIRFLOW & DEFROST
Fig. 9 Air fl ow; probe, sensor locations
AIR FLOW & PRODUCT LOAD
Do not overload the food product display so that it impinges
on the air
fl ow pattern—doing so will result in diminished
performance and loss of proper temperature levels, particu-
larly when the discharge honeycomb and return air grille
are covered. Please keep products within the load limit line
shown on the diagram below (Fig. 8).
JNRZHSA cases utilize electric defrost. The defrost
termination probe is mountes into the coil package from
the left end of the coil. The discharge air probe monitors
the termperature of the discharge air and is found behind
the plug button in the upper
fl ue panel.
For more detailed information on suggested defrost
times and settings, see page 2. Further adjustment
may be required depending on store conditions.
DETERMINING SUPERHEAT
To identify proper superheat settings, complete the following:
1.
Obtain suction pressure from the access port. Obtain the
suction line temperature from the area near the TXV bulb
at the outlet of the evaporator coil (Fig. 10).
2.
Using the suction pressure reading and the Sporlan®
temperature-pressure chart (Appendix C), convert pres-
sure-to-temperature.
3.
Finally, subtract the converted temperature reading from
the actual temperature reading. The resulting number is
the superheat setting—once this has been determined,
adjust the TXV as needed to obtain the proper setting.
Fig. 11 Obtain pressure and temperature readings
DEFROST & TEMPERATURE CONTROLS
Hillphoenix cases utilize electric, hot gas, or timed-off
defrost. The primary components used for the defrost
cycle are the various defrost termination sensors, which
work to terminate the defrost cycle in the case.
JNRBHSA cases utilize Off-Time defrost. The defrost termina-
tion probe is housed at rear wall, behind the lower
rear baf
fl e (Fig 9). The discharge air probe monitors the tem-
perature of the discharge air and may be used as the defrost
termination sensor. The probe can generally be found
behind the rear baf
fl e, in the upper baf fl e, or in front of the
honeycomb.
NOTE: If the discharge air probe is used for defrost termina-
tion, none of the termination sensors listed earlier will be
installed in the case.
Fig. 10 Air fl ow; probe, sensor locations