Detroit Radiant Products Company QTS Series - Manual (Page 26)

QTS Series
26
3.0 Installation • Gas Supply
Chart 3.5 • Manifold Pressure
Pressure Equivalents: 1 Inch W.C. equals .058 oz/sq. in. equals 2.49 mbar.
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.
Gas Supply
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.
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.
Type of
Gas
Required Manifold
Pressure
Minimum Inlet
Pressure
Maximum Inlet
Pressure
Natural 3.5 Inches W.C. 5.0 Inches W.C. 14.0 Inches W.C.
Liquefied Propane 10.0 Inches W.C. 11.0 Inches W.C. 14.0 Inches W.C.