Input Kit - Graco HydroShield WMBL00 Instructions - Parts Manual

Install the the Optional Optional System
Install Install the Optional
Pneumatic Input

Input Kit

Pneumatic Pneumatic Input
The optional System Stop Pneumatic Input Kit
26B414 provides a pneumatic means to signal the
HydroShield system to stop. This contact is normally
open, but turns the system off when activated with a
pressure above the set pressure.
If the input is read as CLOSED, it stops system
operation and puts the system into Off mode. If the
input is read as OPEN, the system operates normally.
The optional System Stop Air input uses a pressure
switch to detect the pneumatic signal.
The optional System Stop Air pressure switch does
not come pre-installed. Purchase and install kit
26B414 to use the optional System Stop Air input.
1. Prepare the electrical controls for service. Follow
the steps in Prepare the Electrical Controls for
Service, page 106.
2. Install two bulkheads in the system.
The location is represented by A12 in
Pneumatic Connections, page
locations are labeled with the following red stop
symbol :
• Install one bulkhead into the bottom of the
control panel (14).
• Install one bulkhead on the right side of the
cabinet.
3A7312D
System Stop Stop
System Stop
Kit
Kit
111. Both
3. Mount the air pressure switch to the DIN rail
(436) to the right of the other pressure switch(s),
as shown in the following figure.
Figure 20 Port Connections for Kit 26B414
4. Remove the wires in the existing terminal blocks
and install in the pressure switch ports as shown
below:
Pressure Switch Pressure Pressure Switch Switch Port Port Port
NO
COM
Air Pressure Pressure
Air Air Pressure
Less than 70 psi (0.5
MPa, 5.0 bar)
Greater than 70 psi
(0.5 MPa, 5.0 bar)
5. Remove unused terminal blocks after connecting
the wires to the pressure switch ports.
6. Connect approximately 1 foot of 5/32" tube from
the pressure switch to the bulkhead on the inside
of the electronics panel.
7. Connect approximately 2 feet of 5/32" tube from
that bulkhead on the electronics panel to the
bulkhead on the side of the unit.
Installation
Terminal Terminal Block Terminal Block Block
3
4
System Stop System System Stop Air Stop Air State Air State State
System Stop Air
inactive (system run)
System Stop Air
activated (system
stop)
25