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SECTION 2
EDR-PURE-IOM-230608
Nominal
ID
Pipe Size
Inch (mm)
Inch (mm)
1-1/4 (31.75)
1.380 (35.05)
1-1/2 (38.1)
1.610 (40.89)
2 (50.8)
2.067 (52.50)
2-1/2 (63.5)
2.469 (62.71)
3 (76.2)
3.068 (77.92)
4 (101.6)
4.026 (102.26)
6 (152.4)
6.07 (154.17)
8 (203.2)
7.98 (202.69)
9. After completing pressure testing and obtaining any
necessary approvals from the AHJ, introduce gas service
and purge gas piping in accordance with local codes.
Do not purge their contents into a con ned space or
where fuel gas can accumulate.
10. The boiler gas train has been factory leak tested
however, ttings may loosen during shipment and
installation. After gas piping is completed and before
wiring installation is started, all piping connections
(factory and eld) must be carefully checked for gas
leaks.. Use a soap and water solution or combustible
gas detector. A GAS-Mate
recommended.
ƒ Components Requiring Ventilation to the
Outdoors
The SKP25 regulating gas valve has independent certi cation
as a ventless regulator and does not require ventilation to
the outdoors. The port marked "AIR" on the actuator is not a
gas vent connection, connecting a vent line to this port may
cause operational issues.
An authority having jurisdiction (AHJ) may not permit the
use of a vent limiter on some or all components. If venting is
required, use the following general guidelines:
ƒ
Drill an appropriately sized penetration for each vent
line through the topmost panel on the rear of the boiler
cabinet (Figure 11). Do not install any vent lines through
removable latching panels. Properly seal around the
pipe with silicone to maintain a sealed cabinet and
ensure combustion air will not bypass the lter.
Questions? Please Contact Your Local Manufacturer's Representative
TABLE 3 SCH 40 PIPE NATURAL GAS CAPACITY
Equivalent Pipe Length
90 Elb
Tee
Feet
Feet
(meter)
(meter)
3.45 (1.05)
6.9 (2.10)
4.02 (1.22)
8.04 (2.45)
5.17 (1.57)
10.3 (3.13)
6.16 (1.87)
12.3 (3.74)
7.67 (2.33)
15.3 (4.66)
10.10 (3.07) 20.2 (6.15)
10.10 (3.07) 23.60 (7.19) -----
13.30 (4.05) 29.10 (8.86) -----
0119 or equivalent is
®
Max Capacity in ft3 of natural gas per hour. 14"wc pressure.
Pressure drop of 0.5"wc. Equivalent length of pipe (feet)
20
40
60
950
-----
-----
1460
990
810
2750
1900
1520
4350
3000
2400
7700
5300
4300
15800
10900
8800
-----
-----
-----
-----
ƒ
Each component must have a separate vent line to
the outdoors. Vent lines must not be manifolded or
combined with any other vent or exhaust systems.
ƒ
Start with the vent connection size and as soon as it is
practical, increase the pipe size one diameter. For every
ten feet of vent, increase the pipe size one diameter.
Never reduce the vent size.
ƒ
Protect the vent termination from debris, dust and
insects. Install the vent termination above the snow
line and point down to prevent ingress of water. The
termination must be a minium of 3 ft (0.9 m) from a
source of ignition.
When required,
run the vent
line(s) through
this panel
FIGURE 11 TOPMOST REAR PANEL
INSTALLATION
80
100
150
-----
-----
-----
-----
-----
-----
1300
1150
950
2050
1850
1500
3700
3250
2650
7500
6700
5500
-----
20220
16503
-----
41200
33660
200
-----
-----
800
1280
2280
4600
12766
29128
2-15
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