Detroit Radiant Products Company LD3 Series - Manual (Page 35)

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LD3 Series 3.0 Installation • 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 and
the installation complies with national and local codes and requirements of the local gas company.
• Unless otherwise noted on the rating plate, this infrared heater is designed and orificed to operate
on standard BTU gas. Contact the factory if utilizing non-standard BTU gas.
• 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.
To connect the gas:
The LD3 Series heater is equipped to connect to the corrugated stainless steel tube (CSST) flexible gas
connector (Included).
Do not connect the main gas line directly to the heaters gas inlet without the
use of the flexible connector. All piping must be installed in accordance with the requirements outlined
in the National Fuel Gas Code ANSI/Z223.1 (latest edition) or CSA-B149.1 and B149.2. Support all gas
piping with pipe hangers, metal strapping, or other suitable material. Do not rely on the heater to support
the gas pipe.
When connecting piping to the unit, the use of a thread joint compound is required. The thread compound
(pipe dope) shall be resistant to the action of liquefied petroleum gas or any other chemical constituents of
the gas to be conducted through piping. Use of Teflon
® tape is not permitted.
Install ground joint union with a brass seat and a manual shut-off valve adjacent to the unit for emergency
shut-off and easy servicing of controls. A 1/8” NPT plugged tap that is accessible for a test gauge
connection is also recommended, as illustrated in Figures 3.24 & 3.25.
A sediment trap must be installed in the supply line in the lowest spot prior to connecting to the heater.
The trap length shall be at least three inches long. Ideally, the trap would be installed as close as possible
to the shut-off, as shown in Figure 3.24.
WARNING
!
Failure to install, operate or service this appliance in the approved manner may result in
property damage, injury or death. Only trained, qualified gas installation and service
personnel may install or service this equipment.
WARNING
!
Always use two (2) opposing wrenches to tighten mating pipe connections to
prevent excessive torque on the gas valve and manifold pipe. Excessive
torque can damage the valve and/or misalign the orifice, resulting in fire,
explosion, serious injury or death.