Drain Pan Trapping; Bcve) - Trane BCHE Installation, Operation And Maintenance Manual

Piping and Connections
3. Braze the connections and allow to cool.
4. Slide the grommets back toward the unit. Trim any
excess if grommets overlap.
5. Remove the adhesive backing and apply the grommets
against the unit panel.
Drain Pan Trapping (Models
BCHE/BCVE)
Note: Size 24-60 BCVE units are internally trapped.
WARNING
No Step Surface!
Failure to follow instruction below could result in
death or serious injury.
Do not walk on the sheet metal drain pan. Walking on
the drain pan could cause the supporting metal to
collapse and result in the operator/technician falling.
Figure 46. Drain pan trapping for negative pressure applications
Negative pressure
Drain pan trapping for section
under negative pressure
L = H + J + pipe diameter where:
H = 1 inch for each inch of negative
pressure plus 1 inch
J = 1/2 H
54
L
NOTICE
Water Damage!
Failure to follow instructions below could result in
equipment and property damage.
Non-factory penetrations through the base of this unit
are not allowed. Any penetration in the base of the
unit may affect the water tight integrity of the unit and
lead to water leaks into the conditioned space.
Condensate drain connections are provided on only one
side of the coil section. Pitch the connection lines
horizontal or downward toward an open drain. Trane
recommends installing a plug to facilitate cleaning of the
trap. The drain connection sizes are:
NPT (national pipe thread) external
Unit size
12-120
The following figure illustrates the proper trapping, piping,
and operation of the trap. Use the formula under the figure
to determine the correct minimum depth for the condensate
trap. If a section has a drain pan for cleaning purposes
only, it does not need a trap; however, a cap or shutoff
valve should be installed on the drain connection. Only
sections handling condensate, such as a cooling coil
section or moisture eliminator section, require a trap.
H
J
connection
3/4-inch
BCX-SVX002A-EN