29
Never use a match or open flame to test for leaks.
B. Connecting The Gas Piping
Refer to Figure #12 (on following page) for the general lay-
out at the boiler. It shows the basic fittings you will need. The
gas line enters the boiler from the right side jacket panel. The
boiler may receive the gas supply pipe through the left side, or
rear jacket panel by relocating the gas valve connector and pipe
assembly. The boiler is equipped with a ½” NPT connection on
the gas valve for supply piping. The following rules apply:
1. Use only those piping materials and joining methods
1.
listed as acceptable by the authority having jurisdiction, or
in the absence of such requirements, by the National Fuel
Gas Code, ANSI Z223.1- latest revision. In Canada, follow
the CSA- B 149.1 and .2 Installation Codes for Gas Burn-
ing Appliances and Equipment.
2. Use pipe joint compound suitable for liquefied petro-
2.
leum gas on male threads only.
3. Use ground joint unions.
3.
4. Install a sediment trap upstream of gas controls.
4.
5. Use two pipe wrenches when making the connection to
5.
the gas valve to keep it from turning.
6. Install a manual shutoff valve in the vertical pipe about 5
6.
feet above floor.
7. Tighten all joints securely.
7.
TABLE #3 – GAS PIPE SIzES
NatUral Gas
length of
Pipe - Ft.
Pipe capacity - BtU Per Hour input includes Fittings
1/2”
3/4”
1”
1 1/4”
20
92,000
190,000
350,000
625,000
40
63,000
130,000
245,000
445,000
60
50,000
105,000
195,000
365,000
ProPaNe Gas
length of
Pipe - Ft.
Pipe capacity - BtU Per Hour input includes Fittings
copper tubing*
iron Pipe
5/8”
3/4”
1/2”
3/4”
20
131,000
216,000
189,000
393,000
40
90,000
145,000
129,000
267,000
60
72,000
121,000
103,000
217,000
* Outside diameter
8. Propane gas connections should only be made by a
8.
licensed propane installer.
9. Two stage regulation should be used by the propane
9.
installer.
10. Propane gas piping should be checked out by the
10.
propane installer.
C. Checking The Gas Piping
After all connection have been made, check immediately
for leaks. Open the manual shutoff valve. Test for leaks by
applying soap suds (or a liquid detergent) to each joint.
Bubbles forming indicate leak. CORRECT EVEN THE
SMALLEST LEAK AT ONCE.
GAS SUPPLy PIPING
WARNING
!
Summary of Contents for UB90-100
Page 15: ...15 Near Boiler Piping Figure 2 Single Zone Boiler Piping ...
Page 16: ...16 Figure 3 Multi zone Boiler Piping With Zone Valves Near Boiler Piping ...
Page 19: ...19 Figure 6 Diaphragm Type Expansion Tank Piping Near Boiler Piping ...
Page 20: ...20 Figure 7 Conventional closed type Expansion Tank Piping Near Boiler Piping ...
Page 27: ...27 Combustion Air and Vent Pipe Figure 11 Combustion Air and Vent Piping ...
Page 32: ...32 Electrical Wiring Figure 13 Field Wiring Connections ...
Page 53: ...53 DETAILED SEQUENCE OF OPERATION ...
Page 57: ...57 TROUBLESHOOTING CHART 2 TROUBLESHOOTING ...
Page 58: ...58 TROUBLESHOOTING CHART 3 TROUBLESHOOTING ...
