Hussmann FNGSC-A, Installation & Operation Manual

Page: 23 / 54

P/N 3141959_C 2-11
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
FNGSC-A Self Contained Merchandisers
INSTALLING DRIP PIPING
(units with a floor drain)
Poorly or improperly installed drip pipes can
seriously interfere with the merchandiser’s
operation and result in costly maintenance and
product losses .
Optional drip pipe arrangements are shown on
the next page . Assemble the components using
PVC specific threaded pipe sealer according to
the manufacturer’s direction .
Please follow the recommendations listed
below when installing drip pipes to ensure
proper installation .
1 . Never use drip piping smaller than the
nominal diameter of the pipe or water seal
supplied with the merchandiser .
2 . When connecting drip piping, the water
seal must be used as part of the drip piping
to prevent air leakage or insect entrance .
Never use two water seals in series in any
one drip pipe .
D
OUBLE WATER SEALS IN
SERIES WILL CAUSE AN AIR LOCK AND
PREVENT DRAINING
.
3 . Pitch the drip piping in the direction of
flow .
There should be a minimum pitch of
1
/
4
in. per ft (20 mm per 1 m).
4 . Avoid long runs of drip piping . Long runs
make it impossible to provide the pitch
necessary for good drainage .
5 . Ensure that drip piping is supported to
relieve any stress on drip pipe connectors
and drain hub .
a . Drip piping MUST be supported 24 inches
from drain hub tee .
6 . Provide a suitable air break between
flood rim of the floor drain and outlet of
drip pipe . To meet code requirements, it may
be necessary to install a field-supplied
drip pipe reducer . An alternative is to
cut the last section of drip pipe at an
angle .
7 . Prevent drip pipes from freezing:
a . Do NOT install drip pipes in contact
with uninsulated suction lines . Suction lines
should be installed with a nonabsorbent
insulation material .
b . Where drip pipes are located in dead air
spaces, such as between merchandisers or
between a merchandiser and a store wall,
provide means to prevent freezing .
It is the installing contractor’s
responsibility to consult local agencies
for local code requirements.