Bosch 830 ES Manual page 18

18 | Installation instructions
Fig. 19
[1] Appliance
[2] Condensate drain
[3] Elbow
[4] Hose clamp
[5] Hanger strap
[6] Horizontal run ¼ " rise/ft
[7] May be insulated if necessary
[8] Chimney
[9] Rain cap
[10] Storm collar
[11] Flashing
[12] Silicone seal
4.3.4 Vent connections
Attaching the exhaust and air inlet connection adaptors to the top of
the heater
▶ Attach the flue gas exhaust accessory to the top of the unit fig. 20
(position 1) using the 4 screws and gasket provided, and fully insert
vent pipe into the accessory. If using 4" venting, a 3" to 4" increaser
should be installed directly after this accessory.
NOTE: Vent pipe must be completely vertical when
inserting or blue gasket inside exhaust accessory can
become displaced. Exhaust accessory can be removed
with vent pipe attached to check gasket position.
6 720 644 936 (2013/01)
Fig. 20 Exhaust connection
▶ Attach the combustion air inlet accessory to the top of the unit fig. 21
(position 2) using the 3 screws and gasket provided, and install 3" air
intake pipe over the accessory.
Fig. 21 Inlet connection
NOTE: The combustion air accessory can be installed on
the top right or on the top left side of the heater. The
combustion air inlet that is not used must be kept sealed.
4.3.5 Connecting the external condensate water drain
NOTICE: Risk of appliance freezing!
▶ Failure to properly install condensate drain can
damage the appliance and will void the warranty.
NOTICE: Risk of appliance freezing!
▶ Do not install condensate drain tubing in areas where
it may freeze.
Use materials approved by the authority having
jurisdiction. In the absence of other authority, PVC, and
CPVC pipe must comply with ASTM D1785, F441
orD2665. Cement and primer must comply with ASTM
D2564 or F493. For Canada, use CSA or ULC certified
PVC or CPVC pipe, fittings and cement, see table 5.
If an external condensate drain (installer supplied) must be installed
(chapter 4.3.2), the following is recommended:
830 ES