Refrigerant Connections; Condensate Drain Connection - Bosch BVA 2.0 Series Installation Instructions Manual

1 8 | Bosch IDS BVA 2.0

7 Refrigerant Connections

Keep the coil connections sealed until refrigerant connections are made. Refer to
the BOVA Installation, Operation, and Maintenance Manual for details on line sizing,
tubing installation, and charging information.
Coil is factory charged with Nitrogen. Evacuate the system before charging with
refrigerant.
Install refrigerant lines so that they do not block service access to the front of the
unit.
Nitrogen should fl ow through the refrigerant lines while brazing.
Use a brazing shield to protect the cabinet's paint and a wet rag to protect the
rubber grommet and input pipe's piston seal ring from being damaged by torch
fl ames. Use a wet rag or an approved heat paste to protect the TXV sensing bulb
during the brazing process. Refer to Figure 13.
After the refrigerant line connections are made, seal the gap around the
connections with pressure sensitive gasket.
Use a wet rag to protect the sealing rings in the
input pipe from being damaged by torch flames
while brazing.
Wet rag
Figure 13
After the brazing work is fi nished, make sure to check that there is no refrigerant
leakage. After checking for vapor leaks, be sure to insulate the pipe connections,
refer to Figure 14.
Do not leave a gap
Vapor line
Piping heat insulation
material
Liquid line
Do not leave a gap
Figure 14
Data subject to change

7.1 Condensate Drain Connection

Consult local codes for specifi c requirements.
Refer to Figure 15 and the information below for required condensate drain trap
installation.
DO NOT OVERTIGHTEN DRAIN FITTING
UNIT MUST BE SLIGHTLY INCLINED
TOWARDS DRAIN CONNECTION
Figure 15
Vapor line
Liquid line

Ensure drain lines do not block access to front of the unit. Minimum
clearance of 24 inches is required for filter, coil or blower removal and
service access.

Make sure unit is leveled or pitched slightly toward primary drain
connection so that water will drain completely from the pan.

Do not reduce drain line size to less than connection size provided on
condensate drain pan.
Air
handler 
All horizontal drain lines must be pitched downward away from the unit at
a minimum of 1/8" per foot of line to ensure proper drainage.

Do not connect condensate drain line to a closed or open sewer pipe. Run
condensate to an open drain or run line to a safe outdoor area.

The drain line should be insulated where necessary to prevent sweating
and damage due to condensate forming on the outside surface of the line.

Make provisions for disconnecting and cleaning of the primary drain line
should it become necessary. Install a 3 inch trap in the primary drain line
as close to the unit as possible. Make sure that the top of the trap is below
connection to the drain pan to allow complete drainage of pan (See Figure
15).
CONDENSATE DRAIN TRAP
DO NOT OPERATE UNIT WITHOUT
CONDENSATE DRAIN TRAP.
UNIT
1. When making drain fi tting connections to the drain pan, use a thin
layer of Tefl on paste, silicone or Tefl on tape and install by hand
tightening.
2. When making drain fi tting connections to drain pan, do not
overtighten. Over tightening fi ttings can split pipe connections on the
drain pan.
02.2019 | Bosch Thermotechnology Corp.
Installation Instructions
TO APPROVED DRAIN