12
Operations
From second stage regulator to machine.
This is based on incoming gas pressure of 11” WC and
a pressure drop of .5” WC. Numbers are for straight
schedule 40 pipe; fittings further reduce capacity.
The chart below is based on gas pressure in the range
0-.5 PSI, specific gravity of .6, and pressure loss of
.5WC. Numbers are for straight schedule 40 pipe;
fittings further reduce capacity.
Venting
If the machine is used indoors, regulations or ventila
-
tion concerns may call for a chimney or furnace pipe.
When venting, if the heating module is to be in an
enclosed area with a chimney on it, be sure the
chimney is the same size as the stack on the module.
Poor draft will cause the machine to soot and not
operate efficiently. When installing, keep in mind that
the machine should be positioned in such a manner
that the stack will be as straight as possible and
protrude through the roof of the building at a proper
location and at sufficient height to eliminate downdraft.
The chimney should be installed with a down draft
diverter.
Input - BTU Per Hour Draft Hood & Flue Pipe Size
250,000 - 320,000
8 inch
320,000 - 410,000
9 inch
NOTE
: If the flue pipe exceeds 10 ft. in length, or
contains more than two elbows, use next size larger
pipe and draft hood, or burner will not ignite. No
movable flue pipe damper should be used on any
installation.
Draft Diverter
The draft diverter shall be installed at least three
(3) feet above the heating coil. The diverter serves to
sever the chimney effect created in all sections of
furnace pipe positioned below to enhance the draft
through the burner. It also helps prevent freezing of the
coil due to wind chill factors.
Draft Diverter
(Optional)
Length
of Pipe
(ft.)
Iron Pipe Size
3/4”
1”
1 1/
4”
1 1/
2”
2”
10
360
680
1400
2100
3950
20
250
465
950
1460
2750
30
200
375
770
1180
2200
40
170
320
660
990
1900
50
151
285
580
900
1680
60
138
260
530
810
1520
70
125
240
490
750
1400
80
118
220
460
690
1300
90
110
205
430
650
1220
100
103
195
400
620
1150
150
84
160
325
500
950
200
72
135
280
430
800
Landa NG 3000 Operator’s Manual 8.913-942.0 - E
Length of
pipe (ft.)
Iron Pipe Size
1/2”
3/4”
1”
10
291
608
1146
20
200
418
788
30
161
336
632
40
137
287
541
50
122
255
480
60
110
231
435
70
102
212
400
80
94
198
372
90
87
185
349
100
84
175
330
Содержание NG-3000
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