Alliance Laundry Systems 250 C.F.M. User Manual

Page of 144
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
M414545
29
INSTALLING STEAM SOLENOID 
VALVE AND MAKING STEAM INLET 
CONNECTIONS
High pressure machines require a (constant) 80 to 100 
psig (pounds per square inch gauge) (5.62  to 7.03 kg/sq. 
cm) steam service for optimum operation. Low pressure 
machines require a (constant) 10 to 15 psig (pounds per 
square inch gauge) (.70 to 1.05 kg/sq. cm) steam service 
for optimum operation. The following steps outline the 
procedure for installing the steam solenoid valve and 
connecting the steam service.
a. Install a manual shut-off gate valve in the condensate 
return line after the steam trap for each coil.
b. Connect the steam solenoid valve to the related steam 
coil inlet connection with nipples, flex hoses, unions, 
and tee. Refer to Figure 9.
c. Install a gate shut-off valve in the steam supply line.  
Connect the shut-off gate valve outlet to the solenoid 
steam valve inlet connection. Refer to Figure 9.
INSTALLING STEAM TRAP AND 
MAKING  CONDENSATE RETURN 
CONNECTIONS
The steam trap must be installed and the coil outlet 
connections must be connected to the condensate return 
lines. The following steps outline the procedure for 
installing the steam trap and connecting the condensate 
return lines. Refer to Figure 9.
a. Connect a flexible hose to each steam coil outlet.
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 the steam coil 
outlet connections.
d. Install a gate shut-off valve to each steam trap.
e. Connect to the condensate return lines.
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 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.
W065
WARNING
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 shut-off 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.
W066
WARNING