About this task
WARNING
- Electrical shock hazard
- Disconnect the power source before making electrical connections to
avoid possible electrical shock or equipment damage.
CAUTION
- Equipment damage hazard
- Carefully position wires so they do not interfere with the manual
reset button. Wires interfering with the reset button can cause the control
to malfunction and damage controlled equipment.
Procedure
-
Disconnect the power source and remove the control cover.
-
Verify that the replacement relay is the correct replacement
for the controlled system. See Table 1.
-
Identify and record the position of each connection terminal and wire on the
original relay.
-
Disconnect all wires that are required to remove the relay from the control
housing.
-
Loosen the two relay mounting screws one complete turn. Do not
remove the mounting screws from the housing. See Figure 1.
-
Slide the time delay relay to the right and lift it out of the control
housing.
-
Install the replacement relay into the control housing and slide it to the left
under the mounting screw heads, then retighten the mounting screws.
-
Reconnect all wires to the terminals that they were connected to on the
original relay.
-
Replace the cover and verify that the reset button lines up correctly with the
cover. Adjust the position of the time delay relay in the control housing if
necessary.
-
Reconnect the power. Check the operation of the control and the controlled
system.
Figure 1. P29 Low-Pressure Cutout Control with time delay relay without
cover
| Callout |
Description |
| A |
Time delay relay |
| B, C |
Relay mounting screw |
| D |
Manual reset button |