Filter Installation; Opening The Collapsed Exhaust Damper Hood - Trane Horizon OABE/F Installation, Operation And Maintenance Manual

Installation
Table 6. Chilled water pipe chase location (in.)
Unit A B
OAK 63.84 19.50
OAN 93.93 20.64
Table 7. Chilled water connection size (MPT-in.)
Unit Size MPT-in.
OAK 12–30 tons 2.5
OAN 30–54 tons 3.0

Filter Installation

Cabinet sizes OAD, OAG, OAK, and OAN ship with 2-inch
permanent filters (mist eliminators) installed in the air inlet
hood. The quantity of filters is determined by unit size.
Access to the filters is through the hinged filter access
panel on the air intake hood. In addition to the filters in the
intake hood, there is a separate bank of filters accessible
through the evaporator coil compartment door. Filter type,
size, and quantity are determined by selected filter option
and unit size.
Note: Do not operate the unit without filters.
Opening the Collapsed Exhaust Damper
Hood
OAB Cabinet
1. To release the damper hood, remove the hex head
sheet metal screws (one per side) shown in DETAIL A
(see Figure 59) and marked by arrow (1).
46
C D
11.00 5.00
11.00 5.00
Figure 59. OAB powered exhaust damper hood,
collapsed
2. Lift the hood upward and rotate the side panels
outward while holding the top up.
3. As shown in DETAIL B (see
arrow (2), secure the side panels to the top of the hood
using (8) hex head sheet metal screws, provided with
the unit, through the pre-punched holes in the top and
side panels (four screws per side).
4. Repeat these steps for the remaining damper hood.
Figure 60) and marked by
OAU-SVX004D-EN