Gas Supply - Brant Radiant Heaters AVS-40N Instructions Manual

AVS Series

Gas Supply

IMPORTANT! Before connecting the gas supply to the burner control box:
• Verify that the heater's gas type (as listed on the rating plate) matches that of your application.
• Check that the gas piping and service has the capacity to handle the total gas consumption of all
heaters being installed, as well as any other gas appliances being connected to the supply line.
• Check that the main gas supply line is of proper diameter to supply the required fuel pressures.
• If utilizing used pipe, verify that its condition is clean and comparable to a new pipe. Test all gas
supply lines in accordance with local codes.
• Test and confirm that inlet pressures are correct. Refer to the heater rating plate for gas type and
the required minimum and maximum pressures (see Chart 3.5). The gas supply pipe must be of
sufficient size to provide the required capacity and inlet pressure to the heater (if necessary,
consult the local gas company). Do not exceed the maximum allowed pressures for the heater,
the space or the gas piping system.
Chart 3.5 • Manifold Pressure
Type of
Gas
Natural
Liquefied Propane
NOTE: Check manifold pressure at the tap on the gas valve. Small variations in manifold pressure
(actual vs. published) may exist due to changing atmospheric conditions. Readings will be above
atmospheric pressure.
Pressure Equivalents: 1 Inch W.C. equals .058 oz/sq. in. equals 2.49 mbar.
NOTE: When installing in areas with high altitude please refer to these chats with orifice eqivalents
Natural Gas @ 3.5 inches W.C
Standard
BTU/h
Orifice
40,000 44
60,000 37
80,000 31
Propne Gas @ 3.5 inches W.C
Standard
BTU/h
Orifice
40,000 55
60,000 52
80,000 49
For altitudes above 8,000 ft, consult factory.
WARNING
!
Improperly connected gas lines may result in fire, explosion,
poisonous fumes, toxic gases, asphyxiation or death. Connect
gas lines in accordance to national, state, provincial and local
codes.
Required Manifold
Pressure
3.5 Inches W.C.
10.0 Inches W.C.
5,000 ft. 6,000 ft.
46
39
32
5,000 ft. 6,000 ft.
55
52
50
25
3.0
Minimum Inlet
Pressure
5.0 Inches W.C.
11.0 Inches W.C.
7,000 ft.
47 47
41 41
32 32
7,000 ft.
55 55
53 53
50 50
Installation • Gas Supply
Maximum Inlet
Pressure
14.0 Inches W.C.
14.0 Inches W.C.
8,000 ft.
47
41
33
8,000 ft.
56
53
51