Havis PT-A-920 Configuration guide

PT-A-920_INST-8-20
INSTALL INSTRUCTIONS PT-A-920
PRISONER TRANSPORT POWER VENT
TOOLS REQUIRED:
Drill and Drill bits Tape measure Wire cutter/crimper Saw to cut plastic tube
4.5” Hole saw Philips screwdriver Caulk gun File
PARTS and HARDWARE:
QTY DESCRIPTION PART#
1 Power Vent assembly 23144
1 Rubber tube adaptor 23178
1 4.250” od x 12” long Extension tube 23176 (Only used for Medium roof height van)
1 6” X 6” vent grill 15662
1 Under dash bracket for switch 14082 (C-UDB-1)
1 Rocker switch 13994 (C-SW-1)
1 Power Vent Label 11129 (C-LABEL-S)
6 #10 x 1/2" PPHSMS 16436
NOTES:
1. Silicone sealant, wiring, wire terminals, wire ties and fuse are not included.
These items must be provided by installer
2. Power vent package includes a bag with (5) #6 x 1" stainless steel flat head sheet metal
screws for attaching vent to roof.
3. Open packaging and confirm that you have all items on parts list.
Always!
 Read all instructions before installing any Havis, Inc. products.
 Check for obstructions (Wires, brake lines, fuel tank, etc.) before drilling any holes!

Use hardware provided with install
ation
kit.
IMPORTANT
 Carefully take your time in measuring for accurate vent hole locations.
 Be sure to run a power and ground wires to the approximate location of power vent so you can
access it through the 4.5” diameter hole in the roof.
 Vacuum all metal chips after drilling and or cutting holes.

PT-A-920_INST-8-20
Vent grill # FPM99063-06
#10 x 1/2" Phillips pan head
sheet metal screws
# 16436
#6 x 1” Phillips flat head
sheet metal screws
PT-A-920 Assembly
Power vent assembly #23144
OEM Van roof
4” long tube included with # 23144 power
vent used for low roof van application.
12” long tube # 23176 provided for
medium roof height van application.
Rubber tube adaptor #23178
Prisoner Transport
Insert ceiling
Cut 4.5” diameter hole
Cut 4.5” diameter hole
Drill ¼” diameter hole
In PVC tube for wires

PT-A-920_INST-8-20
PT-A-920 Installation Procedure
1. All wiring should be routed to approximate locations prior to installing sheet metal parts.
2. With PT insert bulkheads, benches and walls installed, measure from the top of the PT driver
side wall to a location between the van roof ribs and cross supports. Vent does NOT mount in
the center of the van because of overlapping ceiling sheet metal and center divider.
3. The vent is normally located between existing ceiling holes for dome lights and HVAC vents.
Measure ceiling from rear bulkhead end to desired vent location and mark ceiling. Mark side
to side ceiling measurement that was determined in step two (2). This will give you the
correct center location for the power vent.
4. Measure and mark the same vent location on the underside of van roof.
5. Drill pilot holes in the ceiling and roof at vent center locations previously marked.
6. Use the 4.5” diameter hole saw and cut holes in ceiling and roof at pilot hole locations.
Note: If desired, you can install ceiling and then cut both 4.5” holes in the van. This might
help ensure that both holes are aligned correctly, but cleaning metal chips will be more
difficult.
7. Power and ground wiring must be routed to approximate vent location prior to final
installation of ceiling.
8. Detach exterior vent cap from fan housing by removing (2) screws. (save screws)
9. Temporarily place fan housing into roof hole and mark the (4) flange mount holes on roof.
10. Remove fan housing and drill out mount holes in roof with 5/64” diameter drill bit.
11. Measure distance between van roof and PT insert ceiling and subtract 1.5” inches.
12. Insert the supplied 4.25” diameter PVC tube into underside of fan housing.
13. Measure from the bottom of fan housing mounting flange and mark the tube at measurement
determined in step 11.
14. Cut the tube at marked length and deburr ends with file.
15. Insert and glue (or silicone) tube into the fan housing. Let adhesive dry as required.
16. Drill a 1/4” diameter hole in the tube approximately 2” inches down from top.
17. Route fan wires through 1/4” hole and attach quick disconnect terminals to wires. Use silicone
to seal the hole.
18. Place vent grill on underside of ceiling 4.5” hole and mark the (4) mount holes.
19. Drill out ceiling vent grill mount holes with 5/32” diameter drill bit.
20. Locate wires inside van and attach other half of quick disconnect terminals.
Note: Make sure to leave slack in wires to make it easier for final wire connections.
21. Collapse and insert the rubber tube adaptor through the roof hole or ceiling hole.
22. Place power vent assembly on roof, connect wires and slide assembly through hole.
23. From inside, attach rubber adaptor to vent tube. This may require second person on van roof.
Note: Adjust the rubber adaptor as needed to close the gap between the vent tube and ceiling.
24. Slightly lift power vent and apply silicone sealant between roof and vent mount flange.
25. Place vent back on roof and screw down with supplied # 6 x 1” flat head sheet metal screws.
26. Reattach exterior vent cap onto fan housing with original screws.
27. Screw on vent grill to ceiling with supplied # 10 x 1/2” sheet metal screws.
28. Test Power vent operation.
29. Follow the same process on opposite side if more than one power vent is being installed.
30. Under dash switch bracket provided if not mounting switch in console.