Kenmore K90-150 Owner's Manual page 13

above grade. Terminationof the vent shall be
not less than 7 feet above an adjacent public
walkway. T he vent terminalshall not beinstalled
closerthan 3 feetfrom the insidecornerof an L
shapedstructure.Termination of the ventshould
be kept at least 3 feet away from vegetation.
The venting system shall terminateat least 4
feet horizontallyfrom, and in no caseabove or
below electric meters, gas meters, regulators,
andreliefequipment.
If multipleterminationsare used,there mustbe
a minimumof 12 inches betweenthe exhaust
of oneterminationand the air intakeof the next
termination. S ee Figures1-3in SectionE5 for il-
lustrations.
(_NOTE: All field installed vent pipe must be 3".
1. Attach combustion air intake piping to sup-
plied Fernco 2" coupling on CVI gas valve. At-
tach vent piping to furnished 2" CPVC vent tee
on draft inducer outlet.
(_NOTE:AII
pipe
joints are to be water
tight.
2. Working from the boiler to the outside, cut
pipe to required length(s).
3. Deburr inside and outside of pipe. Remove all
chips and shavings.
4. Chamfer outside edge of pipe for better distri-
bution of primer and cement.
5. Clean and dry all surfaces to be joined.
6. Check dry fit of pipe and mark insertion depth
on pipe.
(_OTE: It is recommended that all pipes be cut, prepared, and_
re-assembled before permanently cementing any joint. ,J
7. After pipes have been cut and pre-assem-
bled, apply cement primer to pipe fitting socket
and end of pipe to insertion mark. Quickly apply
approved cement to end of pipe and fitting sock-
et (over primer). Apply cement in light, uniform
coat on the inside of socket to prevent buildup of
excess cement. Apply second coat.
8. While cement is still wet, insert pipe into sock-
et with a 1/, turn twist. Be sure pipe is fully in-
serted into fitting socket.
9. Wipe excess cement from joint. A continuous
bead of cement will be visible around perimeter
of a properly made joint.
10. Handle pipe joint carefully until cement sets.
11. Support combustion air and vent piping a mini-
mum of every 5 feet using pre-formed metal hang-
ing straps. Do not rigidly support pipes. Allow for
movement due to expansion and contraction.
_.NOTE: Rigid supports will cause excess noise in vent piping._
I2. Slope combustion air and vent pipes toward
boiler a minimum of 1¼,,per linear foot with no
sags between hangers.
13. Use appropriate methods to seal open-
ings where vent and combustion air pipes pass
through roof or side wall.
Minimum 4" w.c. 10" w.c.
Maximum 10" w.c. 14" w.c.
Please check fine pressure while unit is running.
The gas pipe to your boiler must be the correct size
for the length of run and for the total BTU per hour
input of all gas utilization equipment connected to
it. See Table 6 for proper size. Be sure your gas
line complies with local codes and gas company
requirements.
The boiler and its individual shutoff valve must be
disconnected from the gas supply piping system
during any pressure testing of that system at test
pressures in excess of ½ psig (3.5kPa).
The boiler must be isolated from the gas supply pip-
ing system by closing its individual manual shutoff
valve during any pressure testing of the gas supply
piping system at test pressures equal to or greater
than ½ psig (3.5kPa).