Connecting Gas Service - Dunkirk D247 Installation Instructions Manual

CONNECTING GAS SERVICE
Connect gas service from meter to control assembly(s) in
accordance with ANSI Z223.1 1984 and local codes or utility
On multiple base boilers, connect gas service with branch
lines from common main. Individual branch lines must be
the same size as the inlet to the gas valve. A ground joint
union should be installed in each branch line for easy
servicing of gas controls. A drip leg or trap should be
installed at the bottom of a vertical section of piping at the
inlet to the control chain, Figure 8. A pipe compound
resistant to the action of liquefied petroleum gases must
be used on all threaded pipe connections.
The main gas supply line should be adequate to prevent
undue pressure drop. See Chart No. 3 for pipe sizes for
gas mains.
To check for leaks in gas piping, use a soap and water
solution or other approved method, DO NOT USE AN
OPEN FLAME.
The boiler must be disconnected from the gas supply piping
system during any pressure testing of that system. Test
the gas connection to the boiler before placing the boiler in
operation.
Minimum Gas Supply Pressure
Models 300,500,600, 1000, 1300,
1500,2000,2100,2500,
2600,3000
Models 400, 700, 800,900, 1100,
1200,1400,1600,1700,
1800, 1900, 2200, 2300,
2400, 2700, 2800, 2900
Maximum Gas Supply Pressure
All Models
Manifold Pressure
All Models
GAS SUPPLY
l
5.0 inches w.c.
5.3 inches w.c.
14.0 inches w.c.
3.5 inches w.c.
SECURE MANIFOLD FROM
BVER HEAD FRAMING
DRIP LEG
INSTALL MANUAL VALVES
5 FEET ABOVE FLOOR
WHERE REQUIRED BY
LOCAL CODES
TYPICAL ISOMETRIC WIRING
AND GAS MAIN PIPING
NOT FURNISHED,
BOILERS ARE FIELD WIRED
AND ASSEMBLED.
FIGURE 8
SUGGESTED WIRING AND GAS MAIN PIPING
CHART 3
TABLE OF PIPE SIZES IN INCHES FOR GAS MAINS
(NATURAL GAS)
Boiler
No. 20' 30' 40' 50' 60' 80' 100' 125' 150'
300 1¼ 1¼ 1¼ 1¼ 1¼ 1¼ 1½ 1½ 1½
400 1¼ 1¼ 1¼ 1¼ 1½ 1½ 1½ 1½ 2
500 1¼ 1¼ 1¼ 1½ 1½ 1½ 2 2 2
600 1¼ 1½ 1½ 1½ 2 2 2 2 2
700 1¼ 1½ 1½ 2 2 2 2 2 2½
800 1½ 1½ 2 2 2 2 2 2½ 2½
900 1½ 2 2 2 2 2 2½ 2½ 2½
1000 1½ 2 2 2 2 2½ 2½ 2½ 2½
1100 2 2 2 2 2 2½ 2½ 2½ 2½
1200 2 2 2 2 2½ 2½ 2½ 2½ 3
1300 2 2 2 2½ 2½ 2½ 2½ 3 3
1400 2 2 2 2½ 2½ 2½ 3 3 3
1500 2 2 2½ 2½ 2½ 2½ 3 3 3
1600 2 2 2½ 2½ 2½ 2½ 3 3 3
1700 2 2½ 2½ 2½ 2½ 3 3 3 3
1800 2 2½ 2½ 2½ 2½ 3 3 3 3
1900 2 2½ 2½ 2½ 3 3 3 3 3
2000 2 2½ 2½ 2½ 3 3 3 3 3
2100 2½ 2½ 2½ 3 3 3 3 3 4
2200 2½ 2½ 2½ 3 3 3 3 4 4
2300 2½ 2½ 3 3 3 3 3 4 4
2400 2½ 2½ 3 3 3 3 3 4 4
2500 2½ 3 3 3 3 3 4 4 4
2600 3 3 3 3 3 4 4 4 4
2700 3 3 3 3 4 4 4 4 4
2800 3 3 3 4 4 4 4 4 4
2900 3 3 4 4 4 4 4 4 4
3000 3 4 4 4 4 4 4 4 4
SEE CHART # 3 FRR GAS
MAIN MANIFRLD SIZING
PROVIDE DISCONNECT
MEANS
AND OVERLOAD
PROTECTION AS REQUIRED
1202V GOHz
4x4x5/8
JUNCTION BOX
(BY INSTALLER)
MOUNT IN
CONVENIENT LOCATION
ADJACENT TO BOILER
ALL WIRING TB CONFORM TO
NEC FOR TEMPERATURE
LIMITATION FOR TYPE "T*
WIRE
(63F
RISE)
ALL WIRING MUST COMPLY WITH ALL
APPLICABLE CODES, REGULATIONS
10
AND ORDINANCES