Hussmann ISLA IM-FH, Installation & Operation Manual

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PN_3034423_C
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Plumbing
Waste Outlet and P-TR AP
The waste outlet is located at the left hand end of these
fixtures allowing drip piping to be run under the fixture
lengthwise.
A 1” P-TRAP and threaded adapter are supplied with
each fixture. The P-TRAP must be installed to prevent
air leakage and insect entrance into the fixture.
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.
. 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 floor 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 flood rim of
the floor 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
Armaflex.
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-404A unless otherwise
specified on the customer order. Check the serial plate
on the case for information.
Piping
The refrigerant line outlets are piped through the rear
of the fixture at the left hand end when viewed from the
back. Insulate suction lines to prevent condensation from
dripping.
Refrigeration L ines
L iquid Su ction
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 11/8”. 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-TR APS
(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.
Contro l Se ttings
Maintain these parameters to achieve near constant
product temperatures. Product temperature should be
measured first thing in the morning, after having been
refrigerated overnight. For all multiplexing, defrost
should be time terminated. Loadmaster valves are not
recommended. 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.
Evaporato r F ans
The evaporator fans are located at the center front of
these merchandisers directly beneath the display pans.
FOR ACCESS TO THE FANS: Remove the right hand
deck pan as viewed from the front of the case.