Detroit Radiant Products Company LS3 Series - Manual (Page 45)

45
LS3 Series
9 After five minutes, observe the pressure rating on the pressure gauge.
The target manifold gas supply pressure for:
• Natural gas is 3.5 inches W.C.
• Propane gas is 10.0 inches W.C.
NOTE: Manifold pressure of the heater is pre-set at the factory. No adjustment should be
necessary.
During the verification process, a tolerance of +/- 5% of the full scale is acceptable due to varying
atmospheric conditions.
If manifold pressure is outside of this tolerance, then an adjustment may be necessary.
Removing pressure gauge from manifold port on gas valve:
10 Set thermostat or other control device to the lowest set point.
11 After heater has completed the post-purge cycle, turn off the electrical power to the heater.
12 Turn off the gas valve with the switch located on the valve body (see Figure 3.29).
13 Remove the pressure gauge tube and the manometer.
14 Replace the manifold pressure tap plug on the gas control valve.
15 Leak check the re-installed pressure tap plug using a soap solution or equivalent method
as described in ANSI Z223.1 (NFPA 54).
Prior to leaving the Job Site
Prior to leaving the job site, verify that:
9 Service access door is properly secured to the unit.
9 The heater is clear of any objects that would interfere with the proper air circulation or that
violate the listed clearance to combustibles.
9 Manual gas shut off is ON.
9 Electrical power is ON.
9 Thermostat is set to desired temperature.
9 Properly dispose of all packaging materials.
9 Check to be sure you have all of your tools.
9 Leave the Installation, Operation, Maintenance and Parts Manual with the owner or end user.
Chart 3.10 • Manifold Pressure
Pressure Equivalents: 1 Inch W.C. equals .058 oz/sq. in. equals 2.49 mbar.
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.
Propane 10.0 Inches W.C. 11.0 Inches W.C. 14.0 Inches W.C.
3.0 Installation • Prior to Leaving the Job Site