Horizon Water Source Heat Pump Field Connection Instructions - Trane Horizon OABD Series Installation, Operation And Maintenance Manual

Verify that the power supply available is compatible with the
unit's nameplate ratings. The available supply power must be
within 10 percent of the rated voltage stamped on the
nameplate. Use only copper conductors to connect the power
supply to the unit.
Horizon Water Source Heat Pump Field
Connection Instructions
The following instructions illustrate the field connections for
water lines on a typical Horizon™ water source heat pump unit.
Water source heat pump units will be installed on curbs with a
pipe chase section attached (as shown in
Figure 123. Typical water source heat pump cabinet
Figure 124. Typical water source heat pump unit curb
Pipe Chase
Section of Curb
1. Open the doors on the water source heat pump cabinet
section to access the coils and the pipe chase panel cover
(see Figure 126 for a view of the pipe chase panel cover
located on the floor of the cabinet section beneath the
center drain pan).
OAU-SVX007A-EN
Figure 125. Rear isometric view (doors hidden for
Figure 123).
Water Source Heat Pump
Cabinet Section
Figure 126. Pipe chase panel cover
Figure 1
2. Remove the hex head sheet metal screws from the center
3. Remove the hex head sheet metal screws from the pipe
4. Cut required holes (size varies depending on unit size and
5. Connect the water lines to the NPT male connections
The "water out" line will contain a factory installed ball valve
with actuator. See
style will vary depending on the tonnage of each unit).
clarity)
drain pan (do not discard) to access the pipe chase panel
cover.
chase panel cover for access to the pipe chase and discard
the cover.
Note: If water lines will not be entering the cabinet section
through the pipe chase, contractor must field-cut
holes and the pipe chase panel cover can remain
in place.)
type of pipe gasket used) in the center drain pan for pipe
entry. Reinstall the center drain pan, insert pipe, and seal
as necessary to prevent water leakage around drain pan/
pipes.
(there is a "water in" and a "water out" connection per unit).
Refer to Table 11, p. 80 for specific water line sizes per
cabinet and tonnage.
Figure 127, p. 80
Installation
Water Source Heat
Pump Coil Location
Center Drain Pan
Figure 3
Rear Isometric View (Doors Hidden
for Clarity)
Fi
Pipe Chas
Pipe Chase Panel Cover
for details (coil size and
79