1
8
Plumbing
Waste Outlet and P-TRAP
The waste outlet is located off the center of the case on
one side allowing drip piping to be run lengthwise under
the fi xture.
A 1-1/2" P-TRAP and threaded adapter are supplied with
each
fi xture. The P-TRAP must be installed to prevent air
leakage and insect entrance into the fi xture.
NOTE: PVC-DWV solvent cement is recommended. Follow the
Hussmann’s instructions.
Installing Condensate Drain
Poorly or improperly installed condensate drains can
seriously interfere with the operation of this refrigerator, and
result in costly maintenance and product losses. Please
follow the recommendations listed below when installing
condensate drains to insure a proper installation:
1. Never use pipe for condensate drains smaller
than the nominal diameter of the pipe or P-TRAP
supplied with the case.
2. When connecting condensate drains, the P-TRAP
must be used as part of the condensate drain
to prevent air leakage or insect entrance. Store
plumbing system
fl oor drains should be at least 14”
off the center of the case to allow use of the P-TRAP
pipe section. Never use two water seals in series in
any one line. Double P-TRAPS in series will cause a
lock and prevent draining.
3. Always provide as much down hill slope (“fall”) as
possible; 1/8” per foot is the preferred minimum.
PVC pipe, when used, must be supported to
maintain the 1/8” pitch and to prevent warping.
4. Avoid long runs of condensate drains. Long runs
make it impossible to provide the “fall” necessary for
good drainage.
5. Provide a suitable air break between the fl ood rim of
the fl oor drain and outlet of condensate drain. 1” is
ideal.
6. Prevent condensate drains from freezing:
a. Do not install condensate drains in contact with
non-insulated suction lines. Suction lines should
be insulated with a non-absorbent insulation
material such as Armstrong’s Armafl ex.
b. Where condensate drains are located in dead
air spaces (between refrigerators or between a
refrigerator and a wall), provide means to prevent
freezing. The water seal should be insulated to
prevent condensation.
Refrigeration
Refrigerant Type
The standard refrigerant will be R-22 unless otherwise
specifi ed on the customer order. Check the serial plate on
the case for information.
Piping
The refrigerant line outlets are located under the case.
Locate fi rst the electrical box, the outlets are then on the
same side of the case, but at the opposite end. Insulate
suction lines to prevent condensation drippage.
Refrigeration Lines
Liquid
Suction
3/8” O.D.
5/8” O.D.
NOTE: The standard coil is piped at
5
/
8
” (suction); however,
the store tie-in may vary depending on the number of
coils and the draw the case has. Depending on the case
setup, the connecting point in the store may be
5
/
8
”,
7
/
8
”,
or 1
1
/
8
”. Refer to the particular case you are hooking up.
Refrigerant lines should be sized as shown on the
refrigeration legend furnished by the store.
Install
P-TRAPS
(oil traps) at the base of all suction line
vertical risers.
Pressure drop
can rob the system of capacity. To keep the
pressure drop to a minimum, keep refrigerant line run as
short as possible, using the minimum number of elbows.
Where elbows are required, use long radius elbows only.
Control Settings
See Q3-DV technical data sheet for the appropriate
settings for your merchandiser. Maintain these parameters
to achieve near constant product temperatures. Product
temperature should be measured fi rst thing in the morning,
after having been refrigerated overnight. For all multiplexing,
defrost should be time terminated. Defrost times should be
as directed in the Q3-DV technical data sheet. The number
of defrosts per day should never change. The duration
of the defrost cycle may be adjusted to meet conditions
present at your location.
Access to TEV Valves and Drain Lines
Mechanical -
Remove product from case. Remove pans.
TX valve (mechanical only) and drain are located under
the pans within the case.
Electronic -
The Electronic Expansion valve master and
slave cylinder(s) are located within the electrical access
panel(s) in the rear of case. Unscrew the rear panels with
Phillips screwdriver.
Electronic Expansion Valve (Optional)
A wide variety of electronic expansion valves and case
controllers can be utilized. Please refer to EEV and
controller manufacturers information sheet. Sensors for
electronic expansion valves will be installed on the coil inlet,
coil outlet, and in the discharge air. (Some supermarkets
require a 4th sensor in the return air). Case controllers will
be located in the electrical raceway or under the case.
