36
Model
Venting Category
Certified Venting
Material
Vent Size (inches)
Maximum Vent
Length (feet)
ADB-751 w/CHX
IV
UL 1738 Certified
Venting Material e.g.
AL29-4C Stainless
Steel PVC*, CPVC*
8
55 Subtract 10 ft per
elbow, Max. 3
elbows
ADB-1001 w/CHX
IV
UL 1738 Certified
Venting Material e.g.
AL29-4C Stainless
Steel PVC*, CPVC*
10
55 Subtract 10 ft per
elbow, Max. 3
elbows
ADB-1501 w/CHX
IV
UL 1738 Certified
Venting Material e.g.
AL29-4C Stainless
Steel PVC*, CPVC*
12
55 Subtract 10 ft per
elbow, Max. 3
elbows
*Contact the manufacturer for details.
Table P: Horizontal Thru-wall Venting with Add-on Condensing Heat Exchanger
Horizontal Thru-wall Venting
System (Category IV) Installation
This installation utilize the boiler mounted blower to
vent the combustion products to the outdoors.
Combustion air is taken from inside the room and the
vent is installed horizontally through the wall to the out-
doors. Adequate combustion and ventilation air must
be supplied to the boiler room in accordance with the
National Fuel Gas Code or, in Canada, the latest edi-
tion of CSA B149 Installation Code for Gas Burning
Appliances and Equipment.
UL 1738 Certified Venting Material (e.g. AL29-4C)
MUST be used. The vent must be installed to prevent
flue gas leakage. Care must be taken during assembly
to ensure that all joints are sealed properly and are air-
tight.
For certain installations, i.e. pool, heat pump, domes-
tic hot water supply with pre-heat tank, PVC or CPVC
may be used. Contact manufacturer for details.
To prevent condensate accumulation in the vent, it is
required to install the horizontal portion of vent with a
slight upward slope of not more than 1/4" per foot of
horizontal run and an approved condensate trap must
be installed per applicable codes, so the condensation
in the vent pipe drains back to the boiler.
The Stainless Steel non-restrictive direct vent cap
must be furnished by the boiler manufacturer in
accordance with its listing.
WARNING:
For common vent installations contact
factory.
WARNING:
No substitutions of flue pipe or vent
cap material are allowed. Such substitutions would
jeopardize the safety and health of inhabitants.
Summary of Contents for 751
Page 2: ...2...
Page 6: ...6 Component Locations Fig 1 Component Locations...
Page 15: ...15 Fig 6 Dual Boiler Piping Fig 7 Dual Boiler Piping with CHX...
Page 20: ...20 Fig 13 Single Boiler Pool Application Fig 14 Single Boiler Pool Application with CHX...
