Post And Rail Arrangement - Daikin RoofPak RPS Series Installation And Maintenance Manual

Post and Rail Arrangement

When welding unit to the curb, do not damage wiring (control
panel side). Weld ONLY in the specified zone in the acceptable
weld zone (see Figure 33). Welding must comply with weld
fillet size, etc. as indicated in
Figure 33: Welding of Unit to Rail—Unit Base, Cross-Sectional View
Unit base
2–48
.25
Weld
.50"
zone
Figure 34: Weld Locations for Rail Arrangement
6–12"
2–48
.25
www.DaikinApplied.com
CAUTION
Figure 33.
Acceptable weld zone
Weld every 48"
1. Set the rooftop unit on the rails. The rails should run
lengthwise and support the entire unit base.
2. Weld both sides of the unit directly to each rail as shown
in Figure 33
required is dependent on the length of the unit.
a. Make the fillet welds 2 inches long, spaced 48
inches apart on centers.
b. Place the end welds 6 to 12 inches from the unit
edge.
NOTE: High temperature insulation is installed at the factory
to allow for field welding along the lower front edge
region of the unit base.
Unit power wiring
(by factory)
Unit base
Field attachment
weld
Rail
High temp
insulation
23
Mechanical Installation
and Figure 34. The total number of welds
Unit control wiring
(by factory)
Rail
Rooftop unit
IM 926-3 • ROOFPAK APPLIED SYSTEMS
Rails
6–12"