Start Up / Operation; Start Up; Tev Adjustment; Load Limits - Hussmann Q3SSM6R Installation & Operation Manual

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T A R T U P

START UP

Follow the controller start up procedures
as detailed in Section 3 of this manual.
Each self contained merchandiser has its
own evaporator coil and a pre-set
thermostatic expansion valve (TEV).
The TEV has been factory set at design
conditions to provide the recommended
performance.

TEV ADJUSTMENT

Expansion valves may be adjusted to fully
feed the evaporator. Before attempting to
adjust valves, make sure the evaporator is
clear or only lightly covered with frost, and
the merchandiser is within 10°F of its
expected operating temperature.
Adjust the valve as follows:
a. Attach a probe to the suction line near the
expansion valve bulb.
b. Obtain a pressure reading from the factory
installed Schraeder valve. Convert the pres-
sure reading to a saturated temperature for the
refrigerant.
Temperature (b) minus Temperature (a) is the
superheat. The valve should be adjusted so that
the greatest difference between the two tem-
peratures is 3°F to 5° F.
Make adjustments of no more than
the valve stem at a time and wait for at least
15 minutes before rechecking the probe tem-
perature and making further adjustments.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
/ O
P E R A T I O N

STOCKING

Product should NOT be placed inside the
merchandisers until merchandisers are at
proper operating temperature.
Allow merchandiser 24 hours to operate before
loading product.
Proper rotation of product during stocking is
necessary to prevent product loss. Always
bring the oldest product to the top and set the
newest to the bottom.
Air discharge and return flues must remain open
and free of obstruction at all
proper refrigeration and air curtain
performance.
Do not allow product, packages, signs, etc. to
block these grilles. Do not use non-approved
shelving, baskets, display racks, or any
accessory that could hamper air curtain
performance.
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Do not allow product to be placed outside of
the designated load limits in the illustration.

LOAD LIMITS

Each merchandiser has a load limit decal. Shelf
life of perishables will be short if load
limit is violated. See the following page for
load limit drawings.
At no time should merchandisers be
stocked beyond the load limits indicated.
Q3 Remote Merchandisers
P/N 3068445 _E
t i m e s to provide