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Step 3. Disconnect the following dimmer bulkhead MTA receptacles
from yoke termination board:
a. Dimmer motor MTA receptacle from header DIM.
b. Dimmer motor sensor (optical switch) MTA receptacle from
header DIM EOT.
c. Thermal switch MTA receptacle from header T1.
d. Photo transistor MTA receptacle from header P.T.
Step 4. At dimmer bulkhead, remove two 6-32x3/8"PPZ screws securing
dimmer bulkhead to head assembly. Slide dimmer bulkhead from
luminaire head.
Step 5. Replace dimmer bulkhead by doing steps 2 thru 4 in reverse.
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Parts:
1 EA ASSY, VL6 DIMMER BLADE (22.9638.0039)
Tools:
Screwdriver, Phillips #2
Nutdrivers, 7/16 inch
White cotton gloves or finger cots
To remove and replace dimmer blade assembly:
Step 1. Remove power from luminaire.
Step 2. Remove dimmer bulkhead (
).
Step 3. At dimmer heatshield, remove four 6-32x1/2"PPZ screws and #6
lockwashers that secure heatshield to dimmer bulkhead. Separate
heatshield from bulkhead (
).
Figure 3-4: Separating Dimmer Bulkhead and Heatshield
DIMVW1
Termal Switch
4-40x5/16"PPB
Screw
Optical Switch
Dimmer Blade
Heatshield
#6 Ext. Tooth
Lock Washer
6-32x1/2"PPZ
Screw
6-32x3/16"PPZ
Screw
Photo
Transistor
Dimmer Bulkhead