Bosch GWH 2400 ES NG Manual page 14

Installation instructions
3.3.2 Condensate drain requirements
A condensate drain must be installed under the
following conditions:
• All vertical terminating vent installations
• Horizontal terminating vent installations where the
total equivalent exhaust vent length is greater than 10
feet. See table 19, page 36.
• Vent installations where any section of the exhaust
vent pipe passes through an unconditioned space.
Note: Do not install condensate drain in areas where it
may freeze.
1. Install condensate drain as close to heater as
possible.
2. Use 3/8" ID high temperature silicone tube to
connect to condensate drain port. Do not use copper
piping for any portion of the condensate drain.
3. Form a condensate trap by means of a 3" loop
partially filled with water.
4. To increase the tube length, connect to end of the
high temperature silicon tubing with vinyl tubing, PVC or
CPVC pipe. Do not reduce the internal diameter at any
point.
5. Dispose of condensate according to local codes.
Fig. 16 Condensate drain installation (combustion air
piping not shown)
3" Venting Z-flex
90° 2SVEVWCF03
Condensate
Horizontal 2SVEDWCF03
Condensate
Condensate 2SVEDTK24
Drain Tube
Table 8 Approved Condensate Drain Part Numbers
14
ProTech Heat Fab
FST3 & 93PPLSTEE
FSDF3
FSHDT3 9321
N/A 7000TUBE
Room sealed installation (TWIN PIPE SYSTEM)
Installing this water heater as a room sealed (TWIN
PIPE SYSTEM) is the recommended method. Contact
your dealer for available vent termination kits and vent
materials for this water heater.
The exhaust and combustion air piping must vent
directly to the outside of the structure.
Warning: In areas where outside
temperatures routinely come close to
freezing, sealed combustion operation
is required.
termination or separate terminations for
combustion and vent, which must be
installed on the same wall or roof
surface, however never facing the
direction of prevailing winds. Failure to
do so may result in heat exchanger
freezing up and bursting. This failure is
not covered under the manufacturer's
warranty.
Fig. 17
Combustion air pipe: ≤ 26 ft (8 m) from collar
Exhaust vent pipe: ≤ 26 ft (8 m) from collar
Fig. 18
Use a concentric
6720608542-05.1AL
6 720 608 782