2525 W CASINO RD BASE FILE 2025-01-03

Standards All unit(s)shall include: The gas fired unit heater(s) shall include ETL Listed and ETL Verified design certification for use in both the US and Canada to the ANSI Z83.8 - latest revision, standard for "Gas Unit Heater and Gas- Fired Duct Furnaces" for safe operation, construction, and performance. Mechanical Configuration Furnace(s) section with 83.0% minimum efficiency provided by an indirect-fired heat exchanger with dimpled tube pattern for efficient heat transfer. Venting Arrangement The venting shall be a power exhausted arrangement. The unit shall be tested to insure proper ignition when the unit is subjected to 40 mile per hour wind velocities. The unit shall also include a factory mounted differential pressure switch designed to prevent main burner ignition until positive venting has been proven. Unit Casing The unit heater(s) casing shall be constructed of not less than 20 gauge aluminized steel with minimization of exposed fasteners. All exterior casing parts shall be cleaned of all oils and a phosphate coating applied prior to painting. The exterior casing parts shall then be painted with an electrostatically applied baked-on gray-green polyester powder paint (7-mil thickness) for corrosion resistance. The unit shall be furnished with horizontal air deflectors. The deflectors are adjustable to provide for horizontal directional airflow control (up or down). Furnace Section The heat exchanger(s) shall be made of 20 gauge aluminized steel tubes and headers. The thermal efficiency of the unit(s) shall be a minimum of 83.0 efficient for all air flow ranges. Each heat exchanger tube shall be individually and directly flame-fired. The heat exchanger tube shall be contoured and dimpled to provide efficient heat transfer and crimped to allow for thermal expansion and contraction. The flue collector box shall be made of 20 gauge aluminized steel. The heat exchanger(s) seams and duct connections shall be certified to withstand 0.5" W.C. external static pressure without burner flame disturbance. The burner(s) shall be made of 28 gauge aluminized steel. Burner(s) shall have non-clogging, slotted ports with a stainless steel separator strip designed for good lighting characteristics without noise of extinction for both natural and propane gas. The ignition controller(s) shall be 100% shut-off with continuous retry. The gas pressure shall be between 6-7" W.0 for natural gas. The solid state ignition system shall intermittently light the pilot each time the system is energized. Once the pilot is proven, the main gas valve shall open and allow gas flow to the main burner.