Installation
GANE-SVX001B-EN
13
2. Refer to
. Match “Length of Pipe in Feet” with
appropriate “Gas Input - Cu. Feet/Hr.” figure. This
figure can then be matched to the pipe size at the top
of the column.
Example:
It is determined that a 67 foot (20.4m) run of gas pipe
is required to connect a 200 MBTU gas unit heater to a
1,000 BTU/cu feet (0.29kW) natural gas supply
200000BTU
Hr
1000BTU
Cu feet
---------------------------------------------------------------------
200Cu feet
hr
=
, a 1 inch pipe is needed.
Note:
See General Safety Information section for English/
Metric unit conversion factors.
NOTICE
If more than one unit heater is to be served by the same
piping arrangement, the total cu. ft./hr. input and
length of pipe must be considered.
NOTICE
If the gas unit heater is to be fired with LP gas, consult
your local LP gas dealer for pipe size information.
NOTICE
Heater installation for use with propane (bottled) gas
must be made by a qualified l.p. gas dealer or installer.
he/she will insure that proper joint compounds are
used for making pipe connections; that air is purged
from lines; that a thorough test is made for leaks before
operating the heater; and that it is properly connected
to the propane gas supply system.
Before any connection is made to the existing line
supplying other gas appliances, contact the local gas
company to make sure that the existing line is of adequate
size to handle the combined load.
Table 3.
Gas pipe size
Nomin
al
Iron
Pipe
Size
Inch
Inter
nal
Diam
eter
Inch
Length of Pipe, Feet (meters)
10
(3.0)
20
(6.1)
30
(9.1)
40
(12.2)
50
(15.2)
60
(18.3)
70
(21.3)
80
(24.4)
90
(27.4)
100
(30.5)
125
(38.1)
150
(45.7)
175
(53.3)
200
(61.0)
1/2
0.622
175
(4.96)
120
(3.40)
97
(2.75)
82
(2.32)
73
(2.07)
66
(1.87)
61
(1.73)
57
(1.61)
53
(1.50)
50
(1.42)
44
(1.25)
40
(1.13)
37
(1.05)
35
(0.99)
3/4
0.824
360
(10.2)
250
(7.08)
200
(5.66)
170
(4.81)
151
(4.28)
138
(3.91)
125
(3.54)
118
(3.34)
110
(3.11)
103
(2.92)
93
(2.63)
84
(2.38)
77
(2.18)
72
(2.04)
1
1.049
680
(19.3)
465
(13.2)
375
(10.6)
320
(9.06)
285
(8.07)
260
(7.36)
240
(6.80)
220
(6.23)
205
(5.80)
195
(5.52)
175
(4.96)
160
(4.53)
145
(4.11)
135
(3.82)
1 1/4
1.380
1400
(39.6)
950
(26.9)
770
(21.8)
660
(18.7)
580
(16.4)
530
(15.0)
490
(13.9)
460
(13.0)
430
(12.2)
400
(11.3)
360
(10.2)
325
(9.20)
300
(8.50)
280
(7.93)
1 1/2
1.610
2100
(59.5)
1460
(41.3)
1180
(33.4)
990
(28.0)
900
(25.5)
810
(22.9)
750
(21.2)
690
(19.5)
650
(18.4)
620
(17.6)
550
(15.6)
500
(14.2)
460
(13.0)
430
(12.2)
2
2.067
3950
(112)
2750
(77.9)
2200
(62.3)
1900
(53.8)
1680
(47.6)
1520
(43.0)
1400
(39.6)
1300
(36.8)
1220
(34.5)
1150
(32.6)
1020
(28.9)
950
(26.9)
850
(24.1)
800
(22.7)
2 1/2
2.469
6300
(178)
4350
(123)
3520
(99.7)
3000
(85.0)
2650
(75.0)
2400
(68.0)
2250
(63.7)
2050
(58.0)
1950
(55.2)
1850
(52.4)
1650
(46.7)
1500
(42.5)
1370
(38.8)
1280
(36.2)
3
3.068
11000
(311)
7700
(218)
6250
(177)
5300
(150)
4750
(135)
4300
(122)
3900
(110)
3700
(105)
3450
(97.7)
3250
(92.0)
2950
(83.5)
2650
(75.0)
2450
(69.4)
2280
(64.6)
4
4.026
23000
(651)
15800
(447)
12800
(362)
10900
(309)
9700
(275)
8800
(249)
8100
(229)
7500
(212)
7200
(204)
6700
(190)
6000
(170)
5500
(156)
5000
(142)
4600
(130)
Notes:
1. Determine the required Cu. Ft./Hr. by dividing the input by 1000. For SI/Metric measurements: Convert BTU/Hr. to kilowatts. Multiply
the units inputs (kW) by 0.0965 to determine Cu. Meters./Hr.
2. For NATURAL GAS: Select pipe size directly from the table.
3. For PROPANE GAS: Multiply the Cu. Ft./Hr. value by 0.633; then, use the table.
4. Refer to the metric conversion factors listed in the General
Safety section for SI Unit measurement conversions.
Pipe Installation
1. Install the gas piping in accordance with applicable
local codes.
2. Check gas supply pressure. Each unit heater must be
connected to a manifold pressure and a gas supply
capable of supplying its full rated capacity as specified
in Table 4. A field LP tank regulator must be used to
limit the supply pressure to a maximum of 14 inches