Q3-DC 0907
5
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 se riously interfere with the operation of this
re frigerator, 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 sys tem 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 pre ferred
minimum. PVC pipe, when used, must be sup-
ported 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
s hould be insulated with a nonabsorbent
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 other wise
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.
1/2” O.D.
NOTE: The standard coil is piped at 1/2” (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 refrig erant line
run as short as possible, using the minimum number
of elbows. Where elbows are re quired, use long radius
elbows only.
CONTROL SETTINGS
See the “Case Specs” section of this guidebook
for the appropriate settings for your merchandiser.
Maintain these parameters to achieve near constant
product temperatures. Product temperature should
first be measured in the morning, after having
been refrigerated overnight. For all multiplexing,
defrost should be time terminated. Defrost length
and frequency should as directed in the Case
Specifi cations section of this guide. 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 Hussmann’s information sheet. Sensors for
