| Positioning on Curb — | |
| Position unit on roof curb so that the following clearances | |
| are maintained: 1/4 in. (6.4 mm) clearance between the | |
| roof curb and the base rail inside the front and back, 0.0 | |
| in. clearance between the roof curb and the base rail | |
| inside on the duct end of the unit. 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 Fig. 4 and Fig. 5, section | |
| Although unit is weatherproof, guard against water from | |
| higher level runoff and overhangs. | |
| Flue vent discharge must have a minimum horizontal | |
| clearance of 4 ft (1220 mm) from electric and gas meters, | |
| gas regulators, and gas relief equipment. Minimum | |
| ||
| distance between unit and other electrically live parts is | |
581J | 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 — Convert to Horizontal and Connect | |
| Ductwork (when required) | |
| Unit is shipped in the vertical duct configuration. Unit | |
| without |
Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork.
Step 8 — Install Outside Air Hood
Economizer and Two Position Damper Hood Package Removal and Setup - Factory Option
1.The hood is shipped in
2.To gain access to the hood, remove the filter access panel. (See Fig. 9.)
FILTER ACCESS PANEL
INDOOR COIL ACCESS PANEL
detector option may be |
configuration. To convert to horizontal configuration, |
Fig. 9 - Typical Access Panel Locations
C10146
remove screws from side duct opening covers and remove | |
covers. Using | the same screws, install covers on vertical |
duct openings | with the |
duct openings must be tight. See Fig. 8. |
3.Locate the (2) screws holding the metal tray to the basepan and remove. Locate and cut the (2) plastic
Hood Parts
Plastic Tie Wrap
Qty (2)
Screws for Metal Tray
Qty (2)
Fig. 8 - Horizontal Conversion Panels
C06108
C08639
Fig. 10 - Economizer and Two-Position Damper
Hood Parts Location
12