48
GTS HUMIDIFIER LX SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Table 48-1:
Flue vent lengths
Model
Minimum equivalent pipe length
ft (m)
Maximum equivalent pipe length
ft (m)
Combustion air intake
Flue gas vent
Combustion air intake
Flue gas vent
2"
(60
mm)
3"
(80
mm)
4"
(mm)
6"
(mm)
2"
(60
mm)
3"
(80
mm)
4"
(mm)
6"
(mm)
2"
(60
mm)
3"
(80
mm)
4"
(mm)
6"
(mm)
2"
(60
mm)
3"
(80
mm)
4"
(mm)
6"
(mm)
LX-50
10 (3) 70 (21)
10 (3) 70 (21)
100
(30)
250
(76)
100
(30)
250
(76)
LX-75
5 (1.5) 30 (9)
10 (3) 30 (9)
50 (15) 200
(61)
50 (15) 200
(61)
LX-100
5 (1.5) 10 (3)
10 (3) 20 (6)
25 (8)
150
(46)
25 (8)
150
(46)
LX-150
10 (3)
10 (3)
100
(30)
100
(30)
LX-200
40 (12) 175
(53)
40 (12) 175
(53)
LX-250
30 (9)
125
(38)
30 (9)
125
(38)
LX-300
25 (8)
100
(30)
25 (8)
100
(30)
LX-400
50 (15) 200
(61)
50 (15) 200
(61)
LX-500
35 (10) 150
(46)
35 (10) 150
(46)
LX-600
100
(30)
100
(30)
General venting (continued)
INSTALLATION
• When applying the codes, reference also the venting manufacturer's instructions, the service gas
supplier's regulations, and the specific instructions provided in this manual.
• Install vent piping as direct as possible, with a minimum number of turns or elbows.
• For Models LX-50 - LX-300 only: Install a drip tee within the first 3' (1 m) of flue venting for flue
condensate removal. If flue vent is less than 10' (3 m) long and a sidewall exit, then no drip tee
• The purpose of venting the gas humidifier is to completely remove all products of combustion
and ventilation gases to the outside air.
• Maintain a minimum upward slope of 1/4" per linear foot (2%) and supported every 4' (1 m)
on all horizontal runs of the flue gas. Maintain proper support of vent connections and joints.
Observe clearances (in accordance with applicable codes) from all combustible materials.
• Inspect for proper and tight construction. Clean and remove any restrictions or obstructions. An
existing chimney may be used as a chase.
• Do not connect this humidifier to a chimney flue servicing any other appliance.
• Dedicated flue gas venting and combustion air piping must be used for each individual LX series
GTS humidifiers.
• The flue gas outlet and combustion air inlet pressures at the vent adapters on the LX series GTS