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SPECIFICATIONS - ALL MODELS <br /> �N�D/NE <br /> Note: Specifications below are extracted from a master gas-fired unit heater specification and therefore <br /> certain numbered sections have been intentionally omitted. <br /> General <br /> A.Standards E.5. The ignition controller(s)shall be 100%shut-off with <br /> All unit(s)shall include: continuous retry. <br /> E.6. The gas pressure shall be between 6-7"W.0 for natural <br /> A.2. ETL design certification for use in both the US and gas(opt).The gas pressure shall be 11-14"W.C.for <br /> Canada to the ANSI Z83.8- latest revision, standard for propane gas. <br /> "Gas Unit Heater and Gas-Fired Duct Furnaces"for safe <br /> operation, construction, and performance. E.7.a. The solid state ignition system shall directly light the <br /> gas by means of a direct spark igniter each time the <br /> thermostat calls for heat. <br /> B.Mechanical Configuration <br /> o E.8. The unit gas controls shall be provided with the <br /> B.3. Condensing furnace section with 93%minimum following: <br /> efficiency provided by an indirect-fired tubular heat <br /> exchanger with individually fired tubes coupled to a E.8.d. Single-stage gas controls with a single-stage <br /> secondary recuperative heat exchanger for maximum combination gas control, an ignition control, and a <br /> heat recovery. single-stage low voltage thermostat.The unit fires at <br /> 100%full fire based on a call for heat from a room <br /> C.Venting/Combustion Air Arrangement thermostat. <br /> C.4. The unit shall be separated combustion.The venting E.9. An automatic reset high limit switch mounted in the air <br /> shall be a power exhausted arrangement with a stream to shut off the gas supply in the event of <br /> separate combustion air intake pipe connection to allow overheating. <br /> for fresh combustion air from outside the conditioned E.9.a. An automatic reset high limit switch mounted on the <br /> space. The unit shall be tested to insure proper ignition power exhauster housing to shut off the gas supply in <br /> when the unit is subjected to 40 mile per hour wind the event of overheating flue gas temperatures. <br /> velocities.The unit shall also include a factory mounted E.9.b. A condensate drain line overflow switch that senses if <br /> differential pressure switch designed to prevent main the condensate line is clogged and shuts the unit heater <br /> burner ignition until positive venting has been proven. down. <br /> Venting shall be Schedule 40 PVC. For Canadian E.10. A time delay relay that delays the start of the air mover <br /> installations, all vent pipe and components must be to allow the heat exchanger a warm-up period after a <br /> approved to ULC S636. call for heat.The time delay relay shall also continue the <br /> air mover operation after the thermostat has been <br /> D. Unit Casing satisfied to remove any residual heat on the heat <br /> D.1. The unit heater(s)casing shall be constructed of not exchanger. <br /> less than 20 gauge aluminized steel with minimization E.11. The unit shall be orificed for up to 2000'elevation above <br /> of exposed fasteners. sea level (opt the unit shall be orificed for <br /> D.2. All exterior casing parts casing parts shall be cleaned elevation above sea level). <br /> of all oils and a phosphate coating applied prior to <br /> painting.The exterior casing parts shall then be painted F. Electrical <br /> with an electrostatically applied baked-on gray-green <br /> polyester powder paint(7-mil thickness)for corrosion F.1. All electrical components shall carry UL, ETL, or CSA <br /> resistance. listing. <br /> D.3. The unit shall be furnished with horizontal air deflectors. F.2. Low voltage terminal board. <br /> The deflectors are adjustable to provide for horizontal F.3. A single 115V to 24V step down transformer shall be <br /> directional airflow control (up or down). provided for all unit controls. <br /> E. Furnace Section G.Air Mover <br /> E.1.e. The primary heat exchanger(s)shall be made of G.1. The motor horsepower shall be . <br /> 18 gauge aluminized steel (opt 409 stainless steel) G.2. The motor shall be factory wired (PTC Models). <br /> tubes and headers. Each heat exchanger tube shall <br /> be individually and directly flame-fired.The heat G.3. The motor shall be controlled by a time delay relay. <br /> exchanger tube shall be crimped to allow for thermal G.4. Propeller models shall meet the following requirements. <br /> expansion and contraction.The flue collector box shall <br /> be made of 20 gauge AL29-4C stainless steel. G.4.a. The motor type shall be Single-speed,totally enclosed(TE) <br /> The thermal efficiency of the unit(s)shall be a minimum G.4.b. The motor shall be rated for: (a)115V/60Hz/1Ph <br /> of 93%efficient for all air flow ranges through the use of G.5. Blower models shall meet the following requirements: <br /> a secondary recuperative heat exchanger.The G.5.a. The motor type shall be single-speed,totally enclosed <br /> secondary heat exchanger shall be constructed of (TE) <br /> AL29-4C stainless steel to withstand the corrosive <br /> environment of condensing gas fired equipment. G.5.b. The motor shall be rated for: <br /> E.2. The heat exchanger(s)seams and duct connections (a) 115V/60Hz/1Ph <br /> shall be certified to withstand 0.9"W.C. external static (b)208V/60Hz/1 Ph (BTC model) <br /> pressure without burner flame disturbance. (c)230V/60Hz/1 Ph (BTC model) <br /> E.3.a. The burner(s)shall be in-shot type, directly firing each (d)208V/60Hz/3Ph (BTC model) <br /> heat exchanger tube individually and are designed for <br /> good lighting characteristics without noise of extinction (e)230V/60Hz/3Ph (BTC model) <br /> for both natural and propane gas. (f)460V/60Hz/3Ph(BTC model) <br /> 6-170.7 (g) 575V/60Hz/3Ph (BTC model) 17 <br />