Speed Queen Drying Tumblers SCB50EG - Manual (Page 49)

47
M412616
information should be obtained from the steam
system supplier or a qualified steam fitter. Size of steam service pipe is dependent upon many
variables (length, tees, high pressure system, low
pressure system, etc.) Specific pipe size
STEAM CONNECTIONS (Steam Drying Tumblers)
STEAM REQUIREMENTS (Steam Drying Tumblers)
INSTALLING STEAM SOLENOID VALVE
AND MAKING STEAM INLET
CONNECTIONS
High pressure machines require a (constant) 80 to
100 psig (5.62 to 7.03 kg/sq. cm) steam service for
optimum operation. Low pressure machines require a
(constant) 10 to 15 psig (.70 to 1.05 kg/sq. cm) steam
service for optimum operation. The following steps
outline procedure for installing steam solenoid valve
and connecting steam service.
a. Install a manual shut-off gate valve in condensate
return line after steam trap for each coil.
b. Connect steam solenoid valve to related steam
coil inlet connection with nipples, flex hoses,
unions, tee and pressure relief valve. See
Figure
24 for a typical installation.
c. Install a gate shut-off valve in steam supply
line, Figure 24. Connect shut-off gate valve
outlet to solenoid steam valve inlet connection.
INSTALLING STEAM TRAP AND MAKING
CONDENSATE RETURN CONNECTIONS
Steam trap must be installed and coil outlet
connections must be connected to condensate return
lines. The following steps outline the procedure for
installing steam trap and connecting condensate
return lines. See
Figure 24 for a typical installation.
a. Connect a flexible hose to each steam coil outlet,
Figure 24.
b. Install a strainer to the ends of each flexible hose.
c. Install a steam trap to each strainer.
IMPORTANT: Steam trap must be installed a
minimum of 10 inches (25.4 cm) below steam coil
outlet connections, see
Figure 24.
d. Install a gate shut-off valve to each steam trap.
e. Connect to condensate return lines.
aWARNING
The flexible steam hoses connecting
the solenoid steam valve to the coil
inlets must have a 125 psig (pounds
per square inch gauge) (8.79 kg/sq.
cm) working pressure. A shut-off gate
valve must be installed upstream from
the solenoid steam valve. This way,
steam can be shut off for maintenance
purposes, or in the event the hose
ruptures.
The steam solenoid valve must be
supported so minimum load is exerted
on the steam coil inlet connections.
aWARNING
The flexible steam hoses connecting
the coil outlet connections and steam
traps must have a minimum of 125
psig (pounds per square inch gauge)
(8.79 kg/sq. cm.) working pressure. A
shutoff gate valve must be installed
downstream from each steam trap so
the condensate return line can be
isolated in event a steam trap requires
maintenance.
Each steam trap must be supported so
minimum load is exerted on the coil
outlet connection.