Part number 550-100-260/0520
19
ECO
®
Tec
G
AS
-
FIRED
WATER
BOILER
–
80/110/150/199
B
OILER
M
ANUAL
Gas piping — sizing gas lines
Boiler gas connection is ½" NPT. Size gas lines large
enough to provide gas to all connected appliances.
Natural Gas:
0IPESIZINGFORNATURALGAS
1. Size gas piping from meter outlet to entrance of boiler in
accordance with Figure 23 and Figure 24.
2. Use total input of all connected appliances. Divide total input
in Btuh by 1,000 to obtain cubic feet per hour of natural gas.
a. Pipe lengths in Figure 23 are equivalent length of straight
pipe. Convert pipe fittings to equivalent lengths using data
from Figure 24.
b. Figure 23 is only for natural gas with specific gravity 0.60,
with a pressure drop through the gas piping as listed in
the table.
c. For additional gas pipe sizing information, refer to ANSI
Z223.1 NFPA 54 – latest edition (or Natural Gas and
Propane Installation CAN/CSA B149.1 or B149.2 for
Canadian installations).
.ATURALGASSUPPLYPRESSURE
1. Pressure required at gas valve inlet pressure port, see
Figure 93, page 102:
a. Maximum: 14" (355 mm) w.c. with no flow (lockup).
b. Minimum gas pressure, with gas flowing (verify during
boiler startup, while boiler is at high fire):
ECO
Tec
80: 3½" (89 mm) w.c.
ECO
Tec
110: 3½" (89 mm) w.c.
ECO
Tec
150/199: 3½" (89 mm) w.c.
c. Nominal gas pressure: 7.0" (178 mm) w.c.
2. Install 100% lockup gas pressure regulator in supply line if
inlet pressure can exceed 14" w.c. at any time. Adjust lockup
regulator for 14" w.c. maximum.
Propane Gas:
You must follow the instructions, beginning on
page 14, to operate the boiler on propane. Failure to
comply could result in severe personal injury, death
or substantial property damage.
0IPESIZINGFORPROPANEGAS
1. Contact gas supplier to size pipes, tanks and 100% lockup gas
pressure regulator.
0IPESIZE
inches
%QUIVALENTLENGTHFEET
%LBOW
4EE
SHORT
RADIUS
LONG
RADIUS
LINE
mOW
BRANCH
mOW
½
3.6
2.2
1.7
4.2
¾
4.4
2.3
2.4
5.3
1
5.2
2.7
3.2
6.6
1¼
6.6
3.2
4.6
8.7
1½
7.4
3.4
5.6
9.9
2
8.5
3.6
7.7
12.0
2½
9.3
4.0
9.3
13.0
'AS
PIPE
TOTAL
LENGTH
FEET
#APACITY
Cubic feet per hour, natural gas, 0.60 specific gravity
Gas pressure 13" (330 mm) w.c. or less
Pressure drop 0.3 inches (7.6 mm) w.c.
Ð
10
132
278
520
1050
1600
3050
4800
20
92
190
350
730
1100
2100
3300
30
73
152
285
590
890
1650
2700
40
N/A
130
245
500
760
1450
2300
50
N/A
115
215
440
670
1270
2000
75
N/A
105
175
360
545
1020
1650
100
N/A
96
150
305
460
870
1400
150
N/A
90
120
250
380
710
1130
0ROPANESUPPLYPRESSURE
1. Adjust propane supply regulator provided by gas supplier for
14" (355 mm) w.c. maximum pressure.
2. Pressure required at gas valve inlet pressure port, see
Figure 93, page 102:
a. Maximum: 14" (355 mm) w.c. with no flow (lockup).
b. Minimum gas pressure, with gas flowing (verify during
boiler startup, while boiler is at high fire):
ECO
Tec
80: 3½" (89 mm) w.c.
ECO
Tec
110: 3½" (89 mm) w.c.
ECO
Tec
150/199: 3½" (89 mm) w.c.
c. Nominal gas pressure: 11.0" (279 mm) w.c.
&IGURE
Pipe capacity for 0.60 specific gravity
natural gas; pipe length is in equivalent
feet.
&IGURE
Equivalent lengths of straight pipe for
typical gas line fittings.
