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FIGURE 42
G26 -3 THROUGH -6 MODEL CONDENSATE
REMOVAL PROCESS
2
1
FLUE TRAP
COLD
HEADER
BOX
FLUE
DRAIN
HOSE
HEADER BOX
CONDENSATE TRAP
4
3
5
6
7
VENT
COMBUSTION
AIR BLOWER
Condensate Removal Process:
1- Condensate mixed with flue products
exits the coil and enters the cold headĆ
er box.
2- Condensate and flue products are sepaĆ
rated. Flue products are drawn into the
combustion air blower while condensate
is drained into the header box condenĆ
sate trap.
3- Flue products are expelled into the flue.
As flue products travel up and out, they
cool and more condensate is produced.
4- Condensate travels down the walls of
the flue pipe and into drain hose.
5- Water drains down through the flue
drain hose and is emptied into the
header box condensate trap.
6- When the cold header box condensate
trap is full, water begins draining out the
condensate drain pipe.
7- An external condensate trap is not reĆ
quired, but a vent is required. The vent
must extend above the height of the conĆ
denser coil (approx. 1 inch above the top
of the cold header box).
DETAIL OF COLD HEADER CONDENSATE TRAP
COLD HEADER BOX
HOSE BARB
RUBBER BOOT OR CAP
1/2"MPT PLUG
1/2"MPT TO FEMALE
PVC PIPE ADAPTER
1/2"PVC
1
COIL OPENING BEHIND
COLD HEADER BOX
2
DETAIL OF
FLUE TRAP
HOSE BARB
6
5
CONDENSATE
FROM COIL
1
4
FLUE DRAIN HOSE
SIDE DETAIL OF
HEADER BOX
CONDENSATION
TRAP
FRONT DETAIL OF
HEADER BOX
CONDENSATION
TRAP
6 - Connect condensate drain line (1/2" [13mm] SDR 11
plastic pipe or tubing) to condensate connection on
drip leg assembly and route to open drain. CondenĆ
sate line must be sloped downward away from drip
leg to drain. If drain level is above drip leg, condenĆ
sate pump must be used to condensate line. CondenĆ
sate drain line should be routed within the conditioned
space to avoid freezing of condensate and blockage
of drain line. If this is not possible, a heat cable kit may
be used on the condensate drip leg and line. Heating
cable kit is available from Lennox in various lengths;
6ft. (1.8m) - kit no. 18K48; 24ft. (7.3m) - kit no. 18K49;
and 50ft. (15.2m) - kit no. 18K50.
III-STARTĆUP
A-Preliminary and Seasonal Checks
1 - Inspect electrical wiring, both field and factory installed
for loose connections. Tighten as required.
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