nVent 89114653 WAMT Operator Adapter Instruction Manual
- June 12, 2024
- nVent
Table of Contents
nVent 89114653 WAMT Operator Adapter
Product Information
The Operator Adapter WAMT is designed for installation with Westinghouse Type AMT Below-Handle Mechanisms for Disconnect Switches and Circuit Breakers, as well as Flex Shaft Handle Mechanisms for Circuit Breakers. It includes various components listed in the parts list, such as adapter plate, plate gasket, screws, slide arm, shoulder collar, lock washers, washers, nuts, interlock blade, and installation instructions.
Installation Instructions
- Step 1: Install the adapter plate (item 1) and plate gasket (item 2) on the inside of the enclosure, behind the rectangular opening provided. Attach the gasket side with PSA to the adapter plate. Secure in place with four screws (item 3) and four nylon washers (item 15).
- Step 2: Assemble the Westinghouse AMTOP operating handle to the mounting plate installed in step 1. Omit the cap screw and lock washer that fits into the bottom hole of the AMTOP operating handle.
- Step 4: Attach the bottom of the slide arm (item 4 or 14) to the offset arm of the lock release mechanism. Use two flat washers (item 8), two lock washers (item 9), and two hex nuts (item 10). Do not tighten until parts are adjusted (see step 5B).
It is important to check the function, fits, and clearances of all equipment
both before and after installation to ensure proper and safe operation that
meets all applicable codes, standards, and
regulations. In case the completed installation does not function properly or
fails to meet any codes, standards, or regulations, do not attempt to make
alterations or operate the equipment. Report any issues to Hoffman Customer
Service immediately.
OPERATOR ADAPTER WAMT
Installation Instructions for Westinghouse Type AMT Below-Handle Mechanisms
for Disconnect Switches and Circuit Breakers, and Flex Shaft Handle Mechanisms
for Circuit Breakers
(For parts list, see Page 2)
For floor-mounted enclosures with the disconnect on the right flange
For one- through six-door free-standing enclosures with the disconnect the the right flange
For floor-mounted enclosures with the disconnect on the centerpost
WARNING
The functions, fits and clearances of the installation described hereon are
calculated from information supplied by the manufacturers of the equipment to
be installed. Be certain to check the function, fits and clearances
of all equipment both before and after installation to assure that it operates
properly and safely and meets all applicable codes, standards and regulations.
In the event the completed installation does not function properly or fails to
meet any such codes, standards or regulations, do not attempt to make
alterations or operate the equipment. Report such facts immediately to:
Hoffman Customer Service
2100 Hoffman Way
Anoka, MN 55303
763.422.2211
http://hoffman.nvent.com/contact-us
Par Listts
Operator Adapter, Catalog Number WAMT, Westinghouse Type AMT Below-Handle
Mechanisms and Flex Shaft Mechanisms
| Item No. | Description | Part No. | Qty. |
|---|---|---|---|
| 1 | ADAPTER PLATE, WEST AMT. | 26264001 | 1 |
| 2 | PLATE GASKET | 89109613 | 1 |
| 3 | SCREW, 1/4-20X1/2 PAN HEAD | 99401031 | 4 |
| 4 | SLIDE ARM | 26250001 | 1 |
| 5 | SHOULDER COLLAR | 26149001 | 1 |
| 6 | SCREW, 1/4-20X7/8 HEX HEAD | 99401030 | 1 |
| 7 | LOCKWASHER, 1/4 SPRING | 99401318 | 1 |
| 8 | WASHER, FLAT | 22101003 | 2 |
| 9 | LOCKWASHER, 1/4 INTERNAL TEETH | 99401300 | 2 |
| 10 | NUT, 1/4-20 HEX | 99401406 | 2 |
| 11 | INTERLOCK BLADE | 26199002 | 1 |
| 12 | SCREW, 10-32X3/8 PAN HEAD | 99401007 | 2 |
| 13 | LOCKWASHER, #10 INTERNAL TEETH | 99401307 | 2 |
| 14 | SLIDE ARM (ALTERNATE) | 26391001 | 1 |
| 15 | NYLON WASHER | 26132003 | 4 |
| 16 | INSTALLATION INSTRUCTIONS | 89114653 | 1 |
Notes:
- Adapter plate to be used for all below-handle AMT mechanisms and for AMT Flex Shaft cable mechanism for F Frame circuit breakers.
- Use slide arm (item 4) for all AMT below-handle mechanisms and AMT Flex Shaft cable mechanisms. Use slide arm (item 14) only for AMT Flex Shaft mechanisms for F Frame circuit breakers.
INTRODUCTION
This installation instruction is for Westinghouse Below−Handle AMT and Flex
Shaft AMT cable mechanisms for F-Frame circuit breakers. These mechanisms are
for disconnect switches and circuit breakers mounted in Hoffman two door,
floor−mounted, enclosures with the disconnect on the right flange.
INSTALLATION STEPS
Step 1
Install adapter plate (item 1) and plate gasket (item 2) on the inside of the
enclosure, behind the rectangular opening provided. Gasket side with PSA
should be attached to adapter plate. Secure in place with four screws (item 3)
and four nylon washers (item 15).
Step 2
Assemble the Westinghouse “AMTOP” operating handle to the mounting plate which
was installed in the enclosure in step 1.
Omit cap screw and lockwasher which fits into bottom hole of “AMTOP” operating
handle.
Step 3
Install the slide arm (item 4 or 14) over the projecting part of the “AMTOP”
operating handle as shown. Note that bottom holes in slide arm are not on
center of slide arm. Place the smaller diameter end of the shoulder ollar
(item 5) through the oval slot in the slide arm. Install long cap screw (item
6) with lockwasher (item 7) hrough shoulder collar into the bottom mounting
hole of the “AMTOP” operating handle and tighten. The slide arm should move up
and down smoothly. Install interlock lever extension per Westinghouse
instructions.
Step 4
Attach the bottom of the slide arm (item 4 or 14) to the offset arm of the
lock release mechanism. Use two flat washers (item 8), two lockwashers (item
9), and two hex nuts (item 10). Do not tighten until parts are adjusted (see
step 5B)
Step 5
The handle safety lock release mechanism is adjustable in two places.
-
Check the adjustment of the factory installed roller bracket. The door latch should hit against the latch stop portion of the roller bracket when the door is closed and latched. Adjust up or down if necessary. The attached mechanism will then
provide the necessary up−down motion required to operate the release mechanism in the “AMTOP” operating handle. -
Adjust the length of the slide arm assembly. With proper adjustment of the slide arm, the safety lock (in “AMTOP” operating handle) should release just before the master door is fully latched. Lengthen slide arm if safety lock releases too soon. Shorten slide arm if safety lock releases too late.
Step 6
Attach the cover interblock blade (item 11), provided by Hoffman, to the
tapped spacer on the door using the bottom set of mounting holes. Used the two
screws (item 12) and lockwashers (item 13). The cover interlock blade prevents
the door from being opened when the “AMTOP” operating handle is in the “ON”
position. This blade may be adjusted up or down to hook properly on the
interlock lever extension. The blade (item 11) must be positioned so the
bottom edge of blade clears the interlock lever extension by 1/4 inch when
“AMTOP” operating handle is in extreme “OFF” position.
Step 7
Drill and tap holes in panel for disconnect required per Westinghouse
instructions. See Westinghouse instructions for location and size of mounting
holes.
Step 8
Install panel in enclosure.
Step 9
Mount disconnect switch or circuit breaker on panel using Westinghouse
instructions and parts.
For Two-Door, Floor-Mounted Enclosures with Disconnect on Right Flange
Step 1
Install adapter plate (item 1) and plate gasket (item 2) on the inside of the
enclosure, behind the rectangular opening provided. Gasket side with PSA
should be attached to the adapter plate. Secure in place with four screws
(item 3) and four nylon washers (item 15).
Step 2
Assemble the Westinghouse “AMTOP” operating handle to the mounting plate which
was installed in the enclosure in step 1.
Omit cap screw and lockwasher which fits into bottom hole of “AMTOP” operating
handle.
Step 3
Install the slide arm (item 4 or 14) over the projecting part of the “AMTOP”
operating handle as shown. Note that bottom holes in slide arm are not on
center of slide arm. Place the smaller diameter end of the shoulder collar
(item 5) through the oval slot in the slide arm. Install long cap screw (item
6) with lockwasher (item 7) through shoulder collar into the bottom mounting
hole of the
“AMTOP” operating handle and tighten. The slide arm should move up and down
smoothly. Install interlock lever extension per Westinghouse instructions.
Step 4
Attach the bottom of the slide arm (item 4 or 14) to the offset arm of the
lock release mechanism. Use two flat washers (item 8), two lockwashers (item
9), and two hex nuts (item 10). Do not tighten until parts are adjusted (see
step 5B)
Step 5
The handle safety lock release mechanism is adjustable in two places.
-
Check the adjustment of the factory installed roller bracket. The door latch should hit against the latch stop portion of the roller bracket when the door is closed and latched. Adjust up or down if necessary. The attached mechanism will then provide the
necessary up−down motion required to operate the release mechanism in the “AMTOP” operating handle. -
Adjust the length of the slide arm assembly. With proper adjustment of the slide arm, the safety lock (in “AMTOP” operating handle) should release just before the master door is fully latched. Lengthen slide arm if safety lock releases too soon. Shorten slide arm if safety lock releases too late.
Step 6
Attach the cover interblock blade (item 11), provided by Hoffman, to the
tapped spacer on the door using the bottom set of mounting holes. Used the two
screws (item 12) and lockwashers (item 13). The cover interlock blade prevents
the door from being opened when the “AMTOP” operating handle is in the “ON”
position. This blade may be adjusted up or down to hook properly on the
interlock lever extension. The blade (item 11) must be positioned so the
bottom edge of blade clears the interlock lever extension by 1/4 inch when
“AMTOP” operating handle is in extreme “OFF” position.
Step 7
Drill and tap holes in panel for disconnect required per Westinghouse
instructions. See Westinghouse instructions for location and size of mounting
holes.
Step 8
Install panel in enclosure.
Step 9
Mount disconnect switch or circuit breaker on panel using Westinghouse
instructions and parts.
For One- Through Six-Door Free-Standing Enclosures with Disconnect on Right
Flange
Step
1
Install adapter plate (item 1) and plate gasket (item 2) on the inside of the
enclosure, behind the rectangular opening provided. Gasket side with PSA
should be attached to the adapter plate. Secure in place with four screws
(item 3) and four nylon washers (item 15).
Step 2
Assemble the Westinghouse “AMTOP” operating handle to the mounting plate which
was installed in the enclosure in step 1.
Omit cap screw and lockwasher which fits into bottom hole of “AMTOP” operating
handle.
Step 3
Cut 2 1/2 inches off bottom end of slide arm (item 4 or 14). Bottom end of
slide arm has rectangular holes only.
Step 4
Install the slide arm (item 4 or 15) over the projecting part of the “AMTOP”
operating handle as shown. Note that bottom holes in slide arm are not on
center of slide arm. Place the smaller diameter end of the shoulder collar
(item 5) through the oval slot in the slide arm. Install long cap screw (item
6) with lockwasher (item 7) through shoulder collar into the bottom mounting
hole of the
“AMTOP” operating handle and tighten. The slide arm should move up and down
smoothly. Install interlock lever extension per Westinghouse instructions.
Step 5
Attach the bottom of the slide arm (item 4 or 14) to the offset arm of the
lock release mechanism. Use two flat washers (item 8),
two lockwashers (item 9), and two hex nuts (item 10). Do not tighten until
parts are adjusted.
Step 6
Adjust the length of the slide arm assembly. With proper adjustment of the
slide arm, the safety lock (in “AMTOP” operating handle) should release just
before the master door is fully latched. Lengthen slide arm if safety lock
releases too soon. shorten slide arm if safety lock releases too late.
Step 7
Attach the cover interblock blade (item 11), provided by Hoffman, to the
tapped spacer on the door using the bottom set of mounting holes. Used the two
screws (item 12) and lockwashers (item 13). The cover interlock blade prevents
the door from being opened when the “AMTOP” operating handle is in the “ON”
position. This blade may be adjusted up or down to hook properly on the
interlock lever extension. The blade (item 11) must be positioned so the
bottom edge of blade clears the interlock lever extension by 1/4 inch when
“AMTOP” operating handle is in extreme “OFF” position.
Step 8
Drill and tap holes in panel for disconnect required. See table for location
of disconnect centerlines. See Westinghouse instructions for location and size
of mounting holes.
Step 9
Install panel in enclosure.
Step 10
Mount disconnect switch or circuit breaker on panel using Westinghouse
instructions and parts.
For Two-Door, Floor-Mounted Enclosures with Disconnect on Centerpost
© 2018 Hoffman Enclosures Inc.
PH 763 422 2211 • nVent.com/HOFFMAN
References
Read User Manual Online (PDF format)
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