Greenheck IG Installation, Operation And Maintenance Manual page 12

2. Attach Mounting Brackets
Attach field-supplied, corrosion resistant, mounting
brackets to the CVA using corrosion resistant sheet
metal screws.
3. Install Exhaust Pipe
Slide the exhaust pipe through the CVA. Provide
enough exhaust piping to pass through the roof and
provide the minimum clearance of 12 inches between
the exhaust pipe termination and the combustion air
intake. With all required clearances satisfied, attach
the exhaust pipe to the CVA.
INTAKE END
Exhaust Connection
(Model IGX)
Combustion Air Connection
(Model IGX)
4. Install Combustion Air Pipe
Attach a field-supplied combustion air pipe to the
concentric side of the CVA.
Be sure to provide enough combustion air piping
to pass through the roof and provide the minimum
clearance of 12 inches between the combustion
air intake and the exterior surface of the roof. This
clearance may need to be increased to allow for snow
accumulation.
Be sure to maintain the minimum clearance of
12 inches between the exhaust pipe termination and
the combustion air intake.
5. Install CVA Assembly
Place the CVA assembly through the roof and verify
that all minimum clearance requirements as specified
in these instructions are met. Secure the CVA
assembly to the ceiling with corrosion resistant sheet
metal screws through the mounting brackets.
6. Attach CVA Assembly to Unit
Attach the exhaust pipe to the unit's combustion
exhaust. Using an additional combustion air pipe,
connect the unit's combustion air supply intake to the
combustion air connection on the CVA.
Be sure to include the required tee's with drip legs and
clean-outs.
12
Model IG / IGX Make-Up Air
Exhaust Connection
(Model IG)
DISCHARGE
END
Combustion Air Connection
(Model IG)
7. Install Combustion Air Inlet Guard and
Exhaust Vent Terminal
Slide the combustion air terminal over the vent pipe
and fasten it to the combustion air pipe. Attach the
exhaust vent terminal to the discharge end of the
exhaust piping.
8. Seal Opening
Seal the opening between the roof line and the air
intake pipe using an appropriate method.
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