Lennox 16L24, 16L23, LB-89657B, LB-89657A, 16L25 User Manual
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GAS UNITS j _:_bic=lo.s
_ Techrlloal
KITS AND ACCESSORIES LithoU,S.A,
©1997 Lennox industries inc.
Datlas, Texas
503,770M
10/97
FURNACE TRANSITION KIT
INSTALLATION INSTRUCTIONS FOR FURNACE TRANSITION KIT CAT# 16L23
(LB-89657A), CAT# 16L24 (LB-89657B), AND CAT# 16L25 (LB-89658A),USED WHEN
CONVERTING FROM G14 UNITS TO G26 UNITS (UPFLOW)
Package 1of 1 contains:
1 - Supply airtransition
1 - External Filter rack (used with kit CAT# 16L23 and
16L24)
1 - Internal filter rack top piece (used with kit CAT#
16L25)
1 - Internal filter rack bottom piece (used with kit
CAT# 16L25)
1 - Filter rack door
1 - Roll of adhesive-backed foam tape (1/8" thick x
5/16" wide)
8- Insulation pins
8- Insulation washers
1 - 1/2" CPVC x 1/2"PVC bushing
2 - Wire ties (used with kit CAT# 16L25)
Check all components for shipping damage. Consult
last carrier immediately if damage is found.
Table 1 shows furnace transition kit usage. These kits
are used when replacing an existing G14 upflow
furnace with a G26 upflow furnace. It allows
installation of the G26 furnace without modification
of the existing supply and side return air plenums.
Bottom return air applications do not require the
provided filter rack,
TABLE 1
G14 installations with air conditionh_g - G14removal
may require raising of coil, or partially or fully
removing the coil. If coil needs to be removed, line
sets may need to be cut, which in turn requires system
pump-down or refrigerant recovery depending on
type of service valves provided on condensing unit or
ambient outdoor temperatures.
Refer to figure 1 for typical G14 installation.
A - G14 units without air conditioning
1 - Set the thermostat to the lowest setting,
2 - Disconnect electrical power to G14 unit,
3- Shut off gas to G14 unit.
4 - Disconnect supply air plenum at unit top.
5 - Remove control access panel,
6 - Cut combustion air intake pipe and exhaust pipe
in location(s) which will allow convenient
reconnection of pipes to G26 unit, and/or
removal of muffler(s) (if installed). Remove
muffler(s) (if installed), Support intake and
exhaust pipes to prevent damage to pipe joints,
7 - Cut condensate drain line in a location which will
allow convenient reconnection with G26 unit.
8 - Disconnect gas line at unit.
9 - Disconnect power wiring at unit.
10 -Disconnect low voltage wiring at unit.
11 -Remove blower access panel.
G14 CABINET WIDTH G26 CABINET WIDTH KIT CAT# (LB#)
inches (mm) inches (mm)
Q3-40 21-1/4 (540) Q2/Q3-50 16-1/4 (413) 16L23 (LB-89657A)
Q3-60 21-1/4 (540) Q3-50 or Q3-75 16-1/4 (413) 16L23 (LB-89657A)
Q4-60 21-1/4 (540) Q4/5-75 21-1/4 (540) 16L25 (LB-89658A)
Q3-80 21-1/4 (540) Q3-75 16-1/4 (413) 16L23 (LB-89657A)
Q4-80 21-1/4 (540) Q4/5-75 21-1/4 (540) 16L25 (LB-89658A
Q5-80 26-1/4 (667) Q4/5-75 21-1/4 (540) 16L24 (LB-89657B)
Q3-100 26-1/4 (667) Q3/4-100 21-1/4 (540) 16L24 (LB-89657B)
Q4/5-t00 26-1/4 (667) Q4/5-100 21-1/4 (540) 16L24 (LB-89657B)
Page 1
12- Removefilterfrominsideof unit(if present).
Units with side return air - Disconnect side
return air plenum at unit.
Units with bottom return air - Disconnect unit
base from return air plenum.
13 -Remove G14 unit,
B - 614 units with air conditioning
IMPORTANT
1 - Set the thermostat to the lowest setting.
2- Disconnect electrical power to G14 and
condensing unit.
3- Shut off gas to G14 unit.
4 - Remove control access panel.
5 - Cut and remove any section of intake pipe which
blocks access to air conditioning coil. Cut intake
and exhaust pipe at a location(s) which will
provide convenient reconnection of pipe(s) to
G26 unit and/or removal of muffler(s) (if
installed). Remove muffler(s) (if installed),
Support intake and exhaust pipe to prevent
damage to pipe joints.
6
Remove coil access panel.
7-
Disconnect coil cabinet/supply air plenum at G14
unit top. If coil/coil cabinet can be lifted enough
to provide vertical clearance for removal of G14
unit, support coil/coil cabinet at needed height
and go to step 11. Ifnot, prepare coil for removal.
8
If condensing unit has fully functional service
valves and outdoor ambient conditions permit
operating compressor, pump-down refrigerant
system; if not, recover refrigerant.
Cut line sets and coil drain line in a location which
will provide convenient reconnection. Move and
support to allow for coil removal,
10 -Slide coil from coil cabinet/supply air plenum.
11 - Cut G14 heat exchanger condensate drain line in
a location which wilt provide convenient
reconnection with G26 unit.
12 -Disconnect gas line at unit.
13 -Disconnect power wiring at unit.
14 -Disconnect low voltage wiring at unit.
15-Remove blower access panel.
16 -Remove filter from inside unit (if present)
Units with side return air - Disconnect side
return air plenum at unit.
Units with bottom return air - Disconnect unit
base from return air plenum,
Page 2
FLEXIBLE ISOLATION
HANGER
EXHAUST PIPE
TYPICAL G14 INSTALLATION
FLEXIBLE BOOT
/ SUPPLY AIR j ......
ii AIR
i
J ...... /_ _ RETURN
ii
f-f i i
ii j- ....
i" --- FLEXIBLE BOOT IN
RETURN AIR PLENUM
SUPPLY AIR PLENUM
INSULATED PAST FIRST ELBOW
FLEXIBLE BOOT IN PLENUM --
MUFFLER
CONDENSATE DRIP LEG
=
MANUAL
MAIN SHUT OFF
VALVE
GAS SUPPLY PIPING
CONTROL
ACCESS PANEL
............. 0
BLOWER RETURN AIR PLENUM
GP_ ELECTRICAL CONDUIT
RETURN AIR PLENUM
INSULATED PAST FIRST
ELBOW
FLEX BLE BOOT N
ISOLATION PADS (ISOMODE) (4) ._
Note - Installation must conform with these
instructions and the installation instructions
packaged with the G26 furnace.
Closet installations - G26 cabinet depth is 2-3/8"
(60.5ram) larger than G14. The G26 may be installed
one inch (25turn) closer to rear of closet (if space
permits) by rotating supply air transition 180 degrees
from that shown in figure 4 or5.
COMPARTMENT i
ACCESSFANEL !
FIGURE 1
A - Filter Rack Installation (Side Return Only)
Note - Filter rack is not used in bottom return air
applications.
I - External Filter Rack
(Used with kit CAT#16L23 and16L24)
1 - Lay G26 unit on its side and cut out return air
opening in cabinet. See figure 4.
2- Filter rack is shipped for right side installation
and for 16 inch (40.6 cm) filter size. If application
requires left side orientation, convert as shown in
figure 2. If application requires 20 inch (50.8 cm)
filter size convert as shown in figure 3.
Page 3
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