Haussmann RFLNS, Installation & Operation Manual

Page: 35 / 64

Reach-In
P/N 0387183_V 2-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Multiplexing
Piping of merchandisers operating on the same
refrigeration system may be run from merchan diser to
merchandiser through the end frame saddles provided
for this purpose.
D
o
NoT
ruN refrigeraNT liNes
Through merchaNDisers ThaT are
NoT
oN The
same refrigeraTioN sysTem
as this may result in poor
refrigeration control and compressor failure.
NOTE: If Gas defrost is used, the liquid line will
need to be increased two sizes larger inside the
merchandiser area. This is necessary to ensure even
liquid drainage from all evaporators during defrost.
Line Sizing
Refrigerant lines should be sized as shown on the
refrigeration legend that is furnished for the store or
according to ASHRAE guidelines.
Oil Traps
P-traps (oil traps) must be installed at the base of all
suction line vertical risers.
Pressure Drop
Pressure drop can rob the system of capacity. To keep
the pressure drop to a minimum, keep the refrigerant
line run as short as possible using a minimum number
of elbows. Where elbows are required,
use loNg
raDius elbows oNly
.
INSULATION
With GAS Defrost
The suction and liquid lines should NOT contact
each other and should be insulated separately
for a minimum of 30 ft (9144 mm) from the
merchandiser.
With OTHER Than Gas Defrost
The suction and liquid lines should be clamped or
taped together and insulated for a minimum of 30 ft
(9144 mm) from the merchandiser.
With All Defrost
Additional insulation for the balance of the liquid and
suction lines is recommended wherever condensation
drippage is objectionable or the lines are exposed to
ambient conditions.
Permit Number:
20-05195