Bosch 940 ES Installation Manual page 16

Installation instructions
10' MIN.
2' MIN.
3' MIN.
FIRESTOP SUPPORT
FIRESTOP SUPPORT
HOSE
CLAMP
ELBOW
CONDENSATE
DRAIN
APPLIANCE
Fig. 17 Vertical venting installation (single pipe pene-
tration)
Warning: Single pipe penetration should be used
in non-freezing climates only!
Fig. 18 Vertical venting installation (twin pipe penetra-
tion)
16
RAIN CAP
STORM COLLAR
FLASHING
4" MIN.
AIR SPACE
6720608158-91.2Av
10' MIN.
2' MIN.
3' MIN.
CHIMNEY
MAY BE INSULATED
IF NECESSARY
HORIZONTAL RUN
1/4" RISE/FT
HANGER STRAP
ELBOW
HOSE
CLAMP
CONDENSATE
DRAIN
APPLIANCE
Fig. 19 Vertical venting installation - Masonry Chim-
ney (combustion air piping not shown)
3.3.4 Vent connections
B Attach the flue gas exhaust accessory (8 705 504
151) to the top of the unit (position 1) using the 4
screws and gasket provided. Fully insert stainless
steel vent pipe 1.5" minimum into the accessory and
tighten the clamp (position 2).
If using the 4" vent, a 3" to 4" increaser is
i
required immediately off the top of the
heater.
NOTE: Vent pipe must be completely ver-
i
tical when inserting or gasket inside ex-
haust accessory can become displaced.
Exhaust accessory can be removed with
vent pipe attached to check gasket posi-
tion.
RAIN CAP
STORM COLLAR
FLASHING
SILICONE SEAL
MORTAR
ELBOW
6720608158-14.2AL
6 720 644 930