Detroit Radiant Products Company FA Series - Manual (Page 14)

14
FA Series
Gas Supply Installation Instructions
The gas supply to the unit heater must be connected and tested in accordance with national, state,
provincial, and local codes along with guidelines in this manual. In the United States refer to the latest
edition of the ANSI Z223.1 (NFPA54) Standard and in Canada refer to the latest edition of the CAN/GCA
B149.1 Standard.
Supply gas piping to the unit should conform with the local and national requirements for type and
volume of gas handled, and pressure drop allowed in the line. Avoid pipe sizes smaller than 1/2”.
Refer to Chart 3.2 for natural gas and Chart 3.3 for propane to determine the cubic feet per hour (CFH)
required for the type of gas and size of unit to be installed. To determine the proper pipe diameter, use
the CFH value and the length of pipe necessary from Chart 3.4. In the case where several units are
serviced by the same main gas line, the total capacity (CFH) and length of main must be adequate to
service all appliances downstream of this main.
3.0 Installation • Gas Supply Installation Instructions
WARNING
!
Improperly connected gas lines may result in serious injury and death,
explosion, poisonous fumes, toxic gases or asphyxiation. Connect gas lines
in accordance to national, state, provincial and local codes.
Gas pressure to the appliance controls must never exceed ½” PSI (14” W.C.). Damage to the
controls may result.
Gas lines should be purged of air as described in ANSI Z223.1 (NFPA 54) or CSA-B149.1– latest
version. Installation of the piping must also conform with the local building codes, or in the
absence of local codes, with the latest edition of the National Fuel Gas Code (NFPA 54). In
Canada, installation must be in accordance with CSA-B149.1
CAUTION
!
NOTICE
The total input to the appliance must fall within +/- 5% of the rated input as indicated on the
rating plate. Otherwise the heat exchanger may prematurely fail.