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DET3
Series
Gas Supply Installation Instructions
The gas supply to the tube 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/
CGA 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".
The installation must conform with local building codes or, in the absence of such codes, the National Fuel
Code (NFPA 54) and in conjunction with ANSI Z21.24/CSA 6.10 "Connectors for Gas Appliances".
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
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.
IMPORTANT! The heating system will expand and contract during operation. Allowances for expansion
must be made between the connection to the heater and the gas supply. A flexible gas connection
of approved type is required. Flexible Type 1 gas connectors installed in one plane, without any sharp
bends, kinks or twists.
!
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 1/2 PSI (14" W.C.).
Damage to the controls may result.
!
CAUTION
NOTICE
3.0
Installation
•
Combustion Air Requirements
39
•
Gas Supply
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