Service manual

SECTION 6: VENTING
13
Figure 6: Standard Vented Heater - Vertical and Horizontal Vent Termination
Figure 7: Standard Vented Heater - Common Vertical Vent Termination
Vent
Terminal
4" Dia.Vent
Flashing
(By Others)
Listed
Thimble
(2" Clearance)
Vent Terminal
Vertical
Option
Horizontal
Option
Vent
Listed
Thimble
(2" Clearance)
Flashing
(By Others)
12" (31 cm)
Minimum
Condensate
Trap to Drain
(Optional)
Note: Vent supports
not shown.
Model Vent Diameter Part Number
UHA 30 - 125 4" (10 cm) 90502102
Roof
18" (46 cm)
Min.
Type "B" vent cap
(7" or 8") may be used.
(These are not available
from Roberts-Gordon.)
Roof
Flashing
Approved
Thimble
(If Applicable)
Type "B" Vent Pipe
4" (10 cm)
Single Wall Pipe
4" (10 cm)
Single Wall Pipe
"D" Area must equal sum
of open area of
individual vents.
"D"
Single Wall Pipe
The last section of vent pipe
passing through the roof or
wall may be Type "B" vent pipe.
All other vent materials in the
building must be single wall
vent pipe.
TOP VIEW
SIDE VIEW