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How to install Acc. 18Z on ASCO Series 4000 Transfer Switch?
Mounting Location
The Accessory 18Z relay board mounts directly behind the operator interface on the inside of the enclosure door. A second Accessory 18Z (which makes it Acc.18Z2) can be mounted onto the first relay board. Maximum of two 18Z relay board can be used per transfer switch.
Figure 1. Accessory 18Z (L-R: Operator Interface Board, 1st Acc. 18Z Relay Board, 2nd Acc. 18Z Relay Board)
Figure 2. Actual Photo, Back of the Enclosure Door
Tools required
1/4” nut driver & small blade screwdriver
Procedure
1. With all power OFF, open the enclosure door. Locate the operator interface (membrane controls) mounted on the inside of the enclosure door.
2. Install (clockwise) four standoffs (from the kit) onto the four studs on the right side of the operator interface board. Tighten the four standoffs with a 1/4” nut driver.
3. Position the relay board (from the kit) so that the terminal block is on the right side. Carefully install the relay board onto the four standoffs (use the left and center holes) so the the socket at the top connects with the pin header on the operator interface board. If a second relay board will be installed, proceed to step 4. Then install (clockwise) four 6–32 elastic stop nuts (from the kit) to secure the assembly. Tighten the nuts.
4. To install a second relay board, remove the four elastic stop nuts (if installed) from the first relay board. Install four standoffs (from the kit) onto the four studs on the first relay board and tighten the standoffs. Position the second relay board like the first,but offset it to the left. Carefully install the second relay board onto the four standoffs (use the left and center holes) so the socket at the top connects with the pin header on the first relay board. Then install four 6–32 elastic stop nuts to secure the assembly. Tighten the nuts.
Figure 3. Accessory 18Z Relay Boards (mounted behind operator interface board).
For further questions, you may send your inquiry to technicalsupport@ascopower.com or Contact 1.800.800.ASCO (2726).
Published for:ASCO Power Technologies USA
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