Outside Air Supply For Two Heaters Controlled By One Thermostat - Roberts Gorden Vantage HE-40 Installation, Operation & Service Manual

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R O B E R T S G O R D O N
VERTICAL INSTALLATION
6" to 12" (15 cm to 30 cm) Long
HORIZONTAL INSTALLATION
Vent Cap
Sweeping 'Y' Connection
Single Wall Pipe
(Seal All Joints)
Figure 27. Non-Pressurized Outside Air Supply for a Maximum of Two Heaters Controlled by a Common Thermostat
OUTSIDE COMBUSTION AIR SUPPLY (CONTINUED)
When air is supplied for combustion to a maximum of two
heaters through a common duct, the following rules
apply:
1. Follow the venting rules on page 22 for detailed
guidelines.
2. The two units must be controlled by a common
thermostat.
3. Use 4'' O.D. (10 cm O.D.) single wall or PVC pipe
between the heater connection and the common
source. The common source will be a minimum of
6'' O.D. (15 cm O.D.) single wall or PVC pipe.
Vent Cap
Flex Pipe
4" (10 cm)
Wall
4" (10 cm)
4" (10 cm)
8 :
S E C T I O N V E N T I N G A N D D U C T I N G
Roof
6" (15 cm)
Band Clamp
Sweeping Tee Connection
Band Clamp
6" (15 cm)
4" (10 cm)
Flex Pipe
6" to 12" (15 cm to 30 cm) Long
4. Combined length of the 4'' (10 cm) and 6'' (15 cm)
pipe shall not exceed 45 ft. (13.7 m) with 2 elbows
maximum per unit (see Fig. 28). See also Vent
Length Requirements heading on page 22 for
more detailed guidelines.
5. Entry of the 4'' (10 cm) pipes will not oppose one
another.
Example: 4 ft. of 6" O.D. (1.2 m of 15 cm O.D.)
common supply air pipe and one
6''x4''x4'' tee are attached to a 4'' pipe
x 4 ft. long, attached to VANTAGE
units. This will limit the flue length to
45 ft. of 4'' (13.7 m of 10 cm) pipe.
Burner Assembly
Burner Assembly
pg 29
® H E