Roof Curb Assembly And Installation - Daikin Rebel Applied DPSA Installation And Start-Up Manual

Roof Curb Assembly and Installation

Mold can cause serious illness and property damage. Some materials
such as gypsum wall board can promote mold growth when damp. Such
materials must be protected from moisture that can enter units during
maintenance or normal operation.
Locate the roof curb and unit on a portion of the roof that can
support the weight of the unit. The unit must be supported to
prevent bending or twisting of the machine.
If building construction allows sound and vibration into the
occupied space, locate the unit over a non-critical area. It
is the responsibility of the system designer to make
adequate provisions for noise and vibration in the
occupied space .
Install the curb and unit level to allow the condensate drain to
flow properly and allow service access doors to open and close
without binding.
Integral supply and return air duct flanges are provided with the
DPSA roof curb, allowing connection of duct work to the
curb before the unit is set. The gasketed top surface of the duct
flanges seals against the unit when it is set on the curb.
These flanges must not support the total weight of the
ductwork. It is critical that the condensate drain side of the
unit be no higher than the opposite side. Assembly of a typical
DPSA roof curb is shown in
Figure 19: Standard Roof Curb Assembly
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WARNING
Figure 19.
Curb Assembly instructions
1. Set curbing parts in accordance with assembly
instructions provided with unit. Take careful note of the
location of return and supply air openings,
2. If applicable, set other curbing parts in place making
sure that the orientation complies with the assembly
instructions. Check alignment of all mating bolt holes.
See Figure
3. Bolt curbing parts together using fasteners provided.
Tighten all bolts finger tight.
4. Square entire curbing assembly and securely tighten all
bolts.
5. Position curb assembly over roof openings. Curb must
be level from side to side and over its length. Check that
top surface of the curb is flat with no bowing or sagging.
6. Weld curbing in place. Caulk all seams watertight.
Remove backing from 0.25ʺ (6 mm) thick × 1.50ʺ (38
mm) wide gasketing and apply to surfaces shown by
cross-hatching.
7. Flash curbing into roof as shown in
8. Be Sure that electrical connection are coordinated (see
Figure 23)
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K
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17
21, Detail A.
Figure
P
IM 1287 • REBEL APPLIED ROOFTOP
Installation
Figure 19.
21, Detail A.
Condenser
Section Support
(if applicable)