19
PART 3 GAS CONNECTIONS
Verify that the appliance is supplied with the type of gas specified on the rating plate. Consult factory for installations at high altitude.
3.1
GAS CONNECTION
•
Safe operation of unit requires properly sized gas supply piping. See gas line sizing data.
•
Gas pipe size may be larger than appliance connection.
•
Installation of a union at the appliance gas line connection is required for ease of service and removal of the gas train.
•
Install a manual main gas shutoff valve, outside of the appliance gas connection as required by local codes.
•
A trap (drip leg) MUST be provided in the inlet gas connection to the appliance.
•
Optional gas controls may require routing of bleeds and vents to the atmosphere, outside the building when required by local
codes.
•
Larger models of this appliance may be supplied with a gas pressure relief valve. This valve is designed to relieve lockup
pressure in excess of the high gas pressure switch setting. It must be piped to discharge excess gas pressure through the valve
to a safe location in accordance with local codes. Follow table 5 for sizing the vent line.
Table 5: Gas Pressure Relief Valve – Vent Manifold Sizing Chart
Size of Combined Vent Line (Sch. 40 pipe)*
Qty of Pressure Relief Valves being combined
Pressure Relief Valve Size – ¾” NPT
Pressure Relief Valve Size - 1” NPT
1
¾”
1”
2
1”
1 ¼”
3
1 ¼”
1 ½”
4
1 ¼”
2”
5
1 ½”
2”
6
1 ½”
2”
7
2”
2 ½”
8
2”
2 ½”
*Up to 50 feet. Increase by one pipe size for every 50 feet or part thereof that the vent line extends beyond the initial 50 feet. The increase is to
be made at the connection to the relief valve.
Table 6: Recommended Gas Pipe Size
Input
0-100 feet
101-200 feet
201-300 feet
Btu/Hr x 1000
NAT.
L.P.
NAT.
L.P.
NAT.
L.P.
1000
2 “
1 ½“
2“
1 ½“
2 ½”
2”
1500
2 ½”
2”
3”
2 ½”
3”
2 ½”
2000
2 ½”
2”
3”
2 ½”
3”
2 ½”
2500
3”
2 ½”
3”
2 ½”
3 ½”
3”
3000
3”
2 ½”
3”
2 ½”
3 ½”
3”
3500
3”
2 ½”
3 ½”
3”
4”
3 ½”
4000
3 ½”
3”
4”
3 ½”
4”
3 ½”
Single Appliance Installation (For distance from natural gas meter or propane second stage regulator)
3.2
GAS PIPING
All gas connections must be made with pipe joint compound resistant to the properties of liquefied petroleum and natural gas. All piping
must comply with local codes and ordinances.
3.3
INSTALL PIPING
•
The gas line should be sufficient to handle the total installed capacity. Verify pipe size with gas supplier.
•
Use new, properly threaded black iron pipe free from burrs. Avoid flexible gas connections. Internal diameter of flexible gas lines
may not provide appliance with proper volume of gas.
•
Install a manual main gas shutoff valve at the appliance gas inlet, outside of the appliance and before the gas valve. Install a
joint union at the appliance gas line connection for ease of service and removal of the gas train.
•
Run gas pipe to appliance gas inlet.
•
Install a sediment trap in the supply line to the appliance gas inlet.
•
Apply a moderate amount of good quality pipe compound.
•
For LP gas, consult your LP gas supplier for expert installation.
The appliance and its individual gas shutoff valve must be disconnected from the supply piping when pressure testing the gas supply
piping at pressures above ½ PSI.
Содержание Avenger Series
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Страница 35: ...30 Figure 21 Recommended Piping with Reverse Return and Variable Primary Flow...
Страница 80: ...75 PART 12 EXPLODED VIEW Note Some items may not be as shown AVENGER PARTS LIST Figure A JACKET ASSMEBLY...
Страница 84: ...79 Figure B BLOWER BURNER ASSEMBLY...
Страница 87: ...82 Figure C TYPICAL GAS TRAIN AR1000 AR3000 Figure D TYPICAL GAS TRAIN AR3500 AR4000...
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