6 - Afterdetermining that each appliance remaining con-
nected to the common venting system prepedy vents
when tested as indicated in step 3, return doors, win-
dows, exhaust fans, fireplace dampers and any other
gas-burning appliance to their previous condition of
use.
7- If improper venting is observed during any of the
above tests, the common venting system must be cor-
rected. The common venting system should be re-
sized to approach the minimum size as determined by
using the appropriate tables in appendix G in the cur-
rent standards of the National Fuel Gas Code ANSI
Z223.1 in the USA, and the appropriate Category 1
Natural Gas and Propane appliances venting sizing
tables in the current standards of the CAN/CGA
B149.1 and B149.2 in the Natural Gas and Propane
Installation Code in Canada.
Horizontal Venting
Side Wall Venting Kit Widng
CX_3 CONTROL 8OX
MOTOR
THERMOSTAT CONNECTIONS
13ERMINAL IN FURN&CE
JUNC'RQN BOX
24 VAC
THERMC_TAT
.... FA_Y4NST_ED WI_NG
-- FIFJ.D-INSTALLED WIRING
FIGURE 17
This furnace design is certified by the American Gas
Association and the Canadian Gas Association for hori-
zontal venting through an outside wall only with the use of a
Field Conb'ols Company Model SWG-4L sidewall venting
kit available as Lennox part number 79J15. No other Field
brand venting kit or any other manufacturer's venting kit is
acceptable. Horizontal venting of this furnace without the
use of the above stated kit is prohibited. See figure 17 for
field wiring of side wall horizontal venting kit,
When horizontally vented, the minimum clearance for
termination from electric meters, gas meters, regulators
and relief equipment is 4 feet (1.2 m)for US installations.
Refer to the current CAN/CGA B149.1 and B149.2 for
installations in Canada or with authorities having localju-
risdiction.
At vent termination, care must be taken to maintain pro-
tective coatings over building materials (prolonged expo-
sure to exhaust condensate can destroy protective coat-
ings). It is recommended that the exhaust outlet not be
located within 6 feet (1.8 m) of a condensing unit because
the condensate can damage the painted coating.
Iiiiiiii_i_ii_lii!ii::i!iiiiii iii {iiil!i¢i!iiiTiiiiT{iiii!iiiiiiii{ii
GAS SUPPLY
1 - This unitisshipped standardfor left orright sideinstal-
lation of gas piping (or top entry in horizontal applica-
tions). Connect the gas supply to the piping assembly.
2- When connecting the gas supply, factors such as
length of run, number of fittings and furnace rating
mustbe considered to avoidexcessive pressure drop.
Table 10 listsrecommendedpipe sizes for typicalaP-
plications.
The gas piping must not runin or throughair ducts,
clotheschutes, gas ventsor chimneys,dumbwaiters
or elevator shafts,
3-
4-
5-
The pipingshouldbesloped 1/4inch(6.4 ram) per 15feet
(4.57 m) upwardtowardthe meterfrom the fumace.The
piping must be supported at proper intervals [every 8 to
10 feet(2.44to 3.01 m)usingsuitablehangers or straps.
A drip leg should be installedin verUcalpipe runs to the
unit.
In somelocalities,codes may require installationof a
manuel main shut-off valve and union (furnished by
the installer) externalto the unit. Union must be of the
groundjointtype.
AIMPORTANT
NOTE - Install a 1/8 inch NPT plugged tap in the _eldpiping
u_m of_e gas supplyconnes_on_ the unit. The tap
must be accessiblefor testgaugeconnection._ee figure 18.
NOTE - In case emergencyshutoffis required, shutoff main
manual gasvalve and disconnect main power to uniL These
devicesshou/d be propedylabeled by theinstaller.
Page 19
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