Specifications include, but are not limited to: Ten(10) unit heaters, 130,000 BTU high efficiency natural gas units. Ceiling mount hanging units, 115/160 supply voltage, 115 volt fan motor, transformer for 24 volt controls, disconnect switch (20A@115v rating, single stage natural gas valve, external gas connection. 1. Acceptable manufacturers - Reznor UEAS, Modine Effinity 93 or MNDOT approved equal. 2. Units shall include operation instructions or manuals. 3. Units shall be covered under manufactures warranty, one year minimum. 4. Unit heaters shall have an American Gas Association (AGA) design certification. 5. The output capacity shall be a minimum of 93% of the input based on steady state thermal efficiency as certified by AGA. 6. Horizontal air deflector louvers shall be provided for controlling discharge air pattern. 7. Heat exchanger shall be designed with direct-fired primary heat exchanger tubes constructed of aluminized steel or stainless steel if indicated on plans. The secondary heat exchanger shall be constructed of aluminized steel or stainless steel and the entire heat exchanger assembly shall be tool pressed, no welding and shall have smoothly contoured stress free aero dynamic tubes. 8. The units shall have a factory mounted and wired integral, vibration isolated power exhauster. The unit shall also include a factory mounted and wired safety pressure switch designed to prevent pilot and main burner ignition until positive venting has been proved. 9. Units shall be provided with direct spark multi try ignition with lockout. All units shall include a redundant type main gas valve, pilot valve, low voltage control transformer, safety high limit control(overhead control), safety pressure switch, gas valve regulator and manual shut off valve. All gas controls shall be rated for a maximum inlet pressure of 1/2 psi and shall be exposed for easy access. Control board shall include diagnostic lights and dip switch for fan settings.
