12
Positioning on Curb —
Position unit on roof curb so that the following clearances
are maintained:
1
/
4
in. (6 mm) clearance between the roof
curb and the base rail inside the right and left,
1
/
2
in.
(12 mm) clearance between the roof curb and the base rail
inside the front and back. This will result in the distance
between the roof curb and the base rail inside on the
condenser end of the unit being approximately equal to
Detail A in Figs. 5 and 6.
Do not attempt to slide unit on curb after unit is set. Doing
so will result in damage to the roof curb seal.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
Flue vent discharge must have a minimum horizontal
clearance of 48 in. (1220 mm) from electric and gas
meters, gas regulators, and gas relief equipment.
Minimum distance between unit and other electrically live
parts is 48 inches (1220 mm).
Flue gas can deteriorate building materials. Orient unit
such that flue gas will not affect building materials.
Locate mechanical draft system flue assembly at least 48
in. (1220 mm) from an adjacent building or combustible
material.
NOTE
: Installation of accessory flue discharge deflector
kit will reduce the minimum clearance to combustible
material to 18 in. (460 mm).
After unit is in position, remove rigging skids and
shipping materials.
Step 7 — Duct Connection
Field--supplied flanges should be attached to horizontal
duct openings (see Fig. 9) and all ductwork should be
secured to the flanges. Insulate and weatherproof all
external ductwork, joints, and roof or building openings
with counter flashing and mastic in accordance with
applicable codes.
Horizontal Return
Duct Opening
2-Position or Manual
Outside Air
Damper Hood
Horizontal Supply
Duct Opening
C09092
Fig. 9 -- Horizontal Duct Opening Cover Panels
Step 8 — Install Outside Air Hood
Economizer and Two Position Hood Removal --
Factory Option
1. The hood is shipped in knock--down form and is
located in the indoor air compartment. The hood is
strapped to the blower assembly. (See Fig. 10).
Hood
Package
C09133
Fig. 10 -- Hood Package -- Shipping Location
2. To gain access to the hood, remove the back blower
access panel.
3. Locate and cut the strap, being careful to not
damage any wiring.
4. Carefully lift the hood assembly through the back
blower access opening and assemble per the steps
outlined in the following procedure.
Two Position Damper and Economizer Hood Installation
-- Factory Option
1. Remove hood top from shipping position. (See
Fig. 11.)
Hood Top
Shipping
Position
C09134
Fig. 11 -- Hood Top – Shipping Position
See Fig. 12 for identification of the various parts of
the hood assembly.
2. Install four angles to the upper end panel using the
screws provided
3. Apply seal strip to mating flanges on the side plates
of the hood (see Fig. 12).
580J
***D
Summary of Contents for 580J***D series
Page 3: ...3 C09128 Fig 1 Unit Dimensional Drawing 17 and 20 Size Units 580J D ...
Page 4: ...4 C09129 Fig 1 Unit Dimensional Drawing 17 and 20 Size Units cont 580J D ...
Page 5: ...5 C09130 Fig 2 Unit Dimensional Drawing 24 and 28 Size Units 580J D ...
Page 9: ...9 C09052 Fig 5 Roof Curb Details 17 and 20 Size Units 580J D ...
Page 10: ...10 C09100 Fig 6 Roof Curb Details 24 and 28 Size Units 580J D ...
Page 22: ...22 C09115 Fig 29 RTU MP System Control Wiring Diagram 580J D ...
