SPECTRUM INSTALLATION AND OPERATING INSTRUCTIONS
Page 17
20
190
350
730
1100
2100
3300
5900
12,000
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
4"
10
278
520
1050
1600
3050
4800
8500
17,500
GAS SUPPLY PIPING
WARNING: Check the boiler/water heater rating
plate to make sure that the boiler/water heater is
for the type of gas that will be used. If it isn’t, do
not connect the boiler/water heater to the gas
supply. Gas supply piping must be in accordance
with the National Fuel Code, ANSI Z223.1-latest
revision or applicable provisions of the local
building codes. Canadian Installations must
comply with CAN/CGA B149.1 or .2 Installation
Code. Failure to comply with this warning can
result in extensive property damage, severe
personal injury or death!
The Spectrum boiler/water heaters come from the
factory ready to be piped to the gas supply. If for any
reason the boiler/water heater is not for the type of gas
available at the installation site, call the nearest RBI
representative to resolve the problem.
NOTE: A minimum gas supply pressure of 5 in,
127 mm
W.C. natural or 12 in,
305 mm
W.C. propane
and maximum 14 in,
356 mm
W.C. natual or propane,
must be available at the safety shutoff valve inlet
with the unit(s) operating.
Table 9 should be used to ensure that the gas supply
piping is sized properly. If more than one appliance is
supplied by the same supply pipe, the piping must be
sized based on the maximum possible demand. Do not
neglect the pressure drop due to pipe fittings. Table 9
should be used in conjunction with Table 10 to ensure
that the gas supply piping has the capacity to meet the
demand.
30
152
285
590
890
1650
2700
4700
9700
Maximum gas volume of pipe, (ft
3
/hr)
Pipe length in feet
Table 9 - Gas Pipe Capacity
Nominal
Iron Pipe
Size, (in)
Maximum pipe capacity in ft
3
/hr based on 0.60 specific gravity gas
at a pressure of 0.5 psig or less and a 0.3" W.C. pressure drop.
50
115
215
440
670
1270
2000
3600
7400
60
105
195
400
610
1150
1850
3250
6800
80
90
170
350
530
990
1600
2800
5800
100
79
150
305
460
870
1400
2500
5100
150
64
120
250
380
710
1130
2000
4100
Note: Multiply the gas volume by 0.62 for propane flow capacity in ft
3
/hr.
Multiply the propane flow capacity by 2500 Btu/ft
3
to determine the propane Btu/hr
capacity for a given pipe size and length.
Figure 10 depicts the proper way to connect the
boiler/water heater to the gas supply piping. The manual
shut-off valve MUST be installed in the supply piping. It
should be installed
5 ft
,
1.5 m above the floor where
required by local codes. Provide a sediment trap at the
bottom of the vertical section of the gas supply pipe
upstream of the gas controls.
A ground joint union should be installed between the
boiler gas controls and the supply piping. Each of these
items are needed to ensure long life and ease of
servicing. Always use a pipe sealant that is suitable for
use with LP gas.
Figure 10 - Gas Supply Piping
CAUTION: Always use a wrench on the gas valve
body when making gas connections to it. Never
over-tighten the piping entering the gas valve body
or gas valve failure may result!
Equivalent of pipe length (ft)
Nominal
Iron Pipe
Size, (in)
Gas
Cock
2
Gate
Valve
2
Tee
1
90
°
Elbow
Type of pipe fitting
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
4"
5.2
6.9
8.0
10.3
12.3
15.3
15.3
0.6
0.8
0.9
1.2
1.4
1.8
1.8
1.5
1.9
2.3
3.0
3.7
4.5
4.5
Notes: 1. For flow through branch.
2. For flow at full open.
Table 10- Equivalent Pipe Length Chart
2.6
3.5
4.0
5.2
6.2
7.7
7.7
40
130
245
500
760
1450
2300
4100
8300
RIOM-47
