Page 9
NOTE - Time is critical at this stage. Do not allow primĆ
er to dry before applying cement.
7 - Immediately after applying last coat of cement to pipe,
and while both inside socket surface and end of pipe
are wet with cement, forcefully insert end of pipe into
socket until it bottoms out. Turn pipe 1/4 turn during asĆ
sembly (but not after pipe is fully inserted) to distribute
cement evenly.
NOTE-Assembly should be completed within 20 secĆ
onds after last application of cement. Hammer blows
should not be used when inserting pipe.
8 - After assembly, wipe excess cement from pipe at end
of fitting socket. A properly made joint will show a
bead around its entire perimeter. Any gaps may indiĆ
cate a defective assembly due to insufficient solvent.
9 - Handle joints carefully until completely set.
Venting Practices
The thickness of construction through which vent/air intake
pipes may be installed is a minimum of 3 inches (610 mm),
and a maximum of 24 inches (610mm). If a G26 furnace re-
places a furnace which was commonly vented with another
gas appliance, the size of the existing vent pipe for that gas
appliance must be checked. Without the heat of the original
furnace flue products, the existing vent pipe is probably
oversized for the single water heater or other appliance.
The vent should be checked for proper draw with the reĆ
maining appliance.
WARNING
Insufficient combustion air can cause headaches,
nausea, dizziness or asphyxiation. It will also cause
excess water in the heat exchanger resulting in rustĆ
ing and premature heat exchanger failure. Excessive
exposure to contaminated combustion air will result
in safety and performance related problems. Avoid
exposure to the following substances in the comĆ
bustion air supply:
Permanent wave solutions
Chlorinated waxes and cleaners
Chlorine base swimming pool chemicals
Water softening chemicals
De-icing salts or chemicals
Carbon tetrachloride
Halogen type refrigerants
Cleaning solvents (such as perchloroethylene)
Printing inks, paint removers, varnishes, etc.
Hydrochloric acid
Cements and glues
Antistatic fabric softeners for clothes dryers
Masonry acid washing materials
Intake Piping
1 - Cement intake piping in slip connector located at top
of unit.
2 - Route piping to outside of structure. Continue with
installation following instructions given in exhaust and
intake piping termination section.
Exhaust Piping
1 - Cement exhaust piping into flue collar socket located
on the left side of the top cap.
2 - All horizontal runs of exhaust pipe must slope back to-
ward unit. A minimum of a 1/4 inch (6mm) drop for each
12 inches (305mm) of horizontal run is mandatory for
drainage. Horizontal runs of exhaust piping must be
supported every 5 feet (1.52m) using hangers.
NOTE - Exhaust piping should be checked carefully to
make sure there are no sags or low spots.
NOTE - Exhaust piping must be insulated with 1/2 inch
(13mm) Armaflex or equivalent when run through unĆ
heated space. Do not leave any area of exhaust pipe
open to outside air; exterior exhaust must be insulated
with 1/2 inch (13mm) Armaflex or equivalent.
CAUTION
Do not discharge exhaust into an existing stack or
stack that also serves another gas appliance. If vertiĆ
cal discharge through an existing unused stack is reĆ
quired, insert PVC pipe inside the stack until the end
is even with the top or outlet end of the metal stack.
CAUTION
The exhaust vent pipe operates under positive presĆ
sure and must be completely sealed to prevent leakĆ
age of combustion products into the living space.
Removal of Unit from Common Venting System
In the event that an existing furnace is removed from a
venting system commonly run with separate gas apĆ
pliances, the venting system is likely to be too large to propĆ
erly vent the remaining attached appliances. The following
test should be conducted while all appliances (both in opĆ
eration and those not in operation) are connected to the
common venting system. If the venting system has been
installed improperly, corrections must be made as outlined
in the previous section.
1 - Seal any unused openings in the common venting sysĆ
tem.
2 - Visually inspect the venting system from proper size
and horizontal pitch and determine there is no block-
age or restriction, leakage, corrosion and other defiĆ
ciencies which could cause an unsafe condition.
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