Wayne SC80 User Manual - page 11
11
Table 4: Pipe Sizing Chart for Liquid Propane (11” w.c.) with Copper Tubing
The following chart is based on
11” w.c.
inlet pressure and a pressure drop of
0.5” w.c.
Maximum Capacity of Tube Size in Btu per Hour
Pipe Size
1/2”
5/8”
3/4”
7/8”
Length (feet)
Maximum Capacity in Btu/hr
10
110,000 206,000 348,000 536,000
20
76,000 141,000 239,000 368,000
30
61,000 114,000 192,000 296,000
40
52,000
97,000 164,000 253,000
50
46,000
86,000 146,000 224,000
60
42,000
78,000 132,000 203,000
70
38,000
71,000 120,000 185,000
80
36,000
67,000 113,000 174,000
90
33,000
62,000 105,000 161,000
100
32,000
59,000 100,000 154,000
NOTE:
Copper tubing shall comply with standard type K or L of ASTM B 88 or ASTM B 280.
TESTING PIPING FOR LEAKS
Before turning gas under pressure into piping, all openings from which gas can escape should be closed. Immediately
after turning on gas, the system should be checked for leaks. This can be done by watching the 1/2 cubic feet test dial
and allowing 5 minutes to show any movement, or by soaping each pipe connection and watching for bubbles. If a leak is
found, make the necessary repairs and repeat the above test. Defective pipes or fittings should be replaced and not
repaired.
Never use a flame
or fire in any form to locate gas leaks, use a soap solution.
After the piping and meter have been checked completely, purge the system of air. Do not bleed the air inside the furnace.
Be sure to relight all the gas pilots on other appliances.
ELECTRICAL WIRING OF BURNER
The SC80 burner is shipped completely wired. It is only necessary to supply the 120 volt circuit, thermostat and limit
circuit. All wiring must conform with the National Electric Code or the code legally authorized in the locality where the
installation is being made. The burner, when installed, must be electrically grounded in accordance with local codes or, in
the absence of local codes, with the latest edition of the National Electrical Code, ANSI/NFPA No. 70. See wiring
diagrams in the Section V: Service and Troubleshooting for reference on wiring, thermostat connection, and limit circuit. If
an external electrical source is utilized, the conversion burner, when installed, must be electrically grounded in
accordance with local codes or, in the absence of local codes, with the latest edition of the National Electrical Code
ANSI/NFPA No. 70.
The burner ships with a jumper wire on the thermostat (T-T) terminals. The jumper needs to be removed for remote
thermostat control and the thermostat needs to be connected per wiring diagrams. T-T terminal is an open/close switch for
the burner and no voltage should be connected to it. For boilers it may be necessary to leave the T-T terminal jumped as
the aquastat may be providing the voltage to the burner and controlling when voltage is sent to the burner. The burner is
controlled by the appliance. Once wiring is complete between burner and appliance, verify appliance is controlling the
burner’s on/off operation. When connecting the burner to the 120 volt electrical supply, utilize the knockout provided on
the burner’s junction box.