Installation
3A7931B
11
Connect and Disconnect Air
Tubes
Follow these steps when connecting and disconnecting
any air tubes on the DM-22 supply system.
Connection
1. Grasp the tube, then slowly push it straight into the
fitting until it stops.
2. To avoid disconnection when air pressure is
applied, pull gently on the tube to ensure a secure
connection.
Disconnection
1. Follow the
2. Push evenly on the fitting’s red release button.
3. While pressing the release button, pull tube out of
fitting.
4. To reuse the tubing, cut off the previous connection
portion at 90
°
while being careful not to damage the
outer diameter of the tube.
NOTE:
Use of a tube cutter is recommended. The fitting
will leak if tubing is not cut at 90
°
.
System Components and
Accessories
The following components are supplied with the pump
(see F
•
The Bleed-type Master Air Valve (AC)
is supplied
with your system to relieve air trapped between this
valve and the pump after the air is shut off. Trapped
air can cause the pump to cycle unexpectedly. The
valve is located close to the pump, downstream
from the pump air regulator.
•
The Pump Air Regulator (AE)
controls pump
speed and outlet pressure by adjusting the air pres-
sure to the pump. The regulator is located upstream
from the bleed-type master air valve.
•
The Ram Air Regulator (AF)
controls ram speed
by adjusting air pressure to the ram and pressure
exerted by the wiper plate on the fluid.
•
The Pump Bleeder Valve (AD)
is supplied with
your system to relieve fluid pressure in the displace-
ment pump, hose, and dispensing valve. However,
triggering the dispensing valve may not be sufficient
to fully relieve pressure. Ensure the drain hole in the
valve is pointing down. This valve is also used to
bleed air from the pump when priming.
Air Line
Connect an air supply line to the 8 mm(f) Main Air Line
Inlet Fitting (AR). Install an air line filter and lubricator in
the main air line. In the main air line, upstream from all
other air line accessories, install a second bleed-type
master air valve to shut off all air to the system and to
isolate accessories for servicing.
Fluid Line
Connect a fluid line to the Fluid Outlet Fitting (AG). Con-
nect a suitable dispensing valve to the free end of the
line.
To help reduce the risk of serious injury when adjust-
ing or repairing the pump, the pressure must be
relieved. The pump includes two required safety
devices: the bleed-type master air valve (AC) and the
Pump Bleeder Valve (AD). These devices are used as
part of the Pressure Relief Procedure.
