Based on Dfd Master Specification Dated 10/1/2012

1 SECTION 23 54 00 2 GAS FIRED FURNACES 3 BASED ON DFD MASTER SPECIFICATION DATED 10/1/2012 4 5 This section has been written to cover most (but not all) situations that you will encounter. Depending on 6 the requirements of your specific project, you may have to add material, delete items, or modify what is 7 currently written. The Division of Facilities Development expects changes and comments from you. 8 9 PART 1 GENERAL 10 SCOPE 11 This section includes specifications for gas fired furnaces. Included are the following topics: 12 13 PART 1 - GENERAL 14 Scope 15 Related Work 16 Reference 17 Reference Standards 18 Quality Assurance 19 Energy Efficiency 20 Submittals 21 Operation and Maintenance Data 22 Warranty 23 PART 2 - PRODUCTS 24 Furnaces 25 26 PART 3 - EXECUTION 27 Installation 28 Furnaces 29 Construction Verification Items 30 Functional Performance Testing 31 Agency Training 32 33 RELATED WORK 34 Section 01 91 01 or 01 91 02 – Commissioning Process 35 Section 23 08 00 – Commissioning of HVAC 36 Section 23 11 00 - Facility Fuel Piping 37 Section 23 05 23 - General-Duty Valves for HVAC Piping 38 Section 23 05 13 - Common Motor Requirements for HVAC Equipment 39 Section 23 51 00 - Breechings, Chimneys, and Stacks 40 41 REFERENCE 42 Applicable provisions of Division 1 govern work under this section. 43 44 REFERENCE STANDARDS 45 AGA American Gas Association 46 ANSI Z21.64 Direct Vent Central Furnaces 47 GAMA Gas Appliance Manufacturers Association 48 NEC National Electrical Code 49 50 QUALITY ASSURANCE 51 Refer to division 1, General Conditions, Equals and Substitutions. 52 53 ENERGY EFFICIENCY 54 Provide gas furnaces that bear the ENERGY STAR label and meet the ENERGY STAR specifications for energy 55 efficiency. 56 57 SUBMITTALS Refer to division 1, General Conditions, Submittals. 58 Include specific manufacturer and model numbers, equipment identification corresponding to project drawings and 59 schedules, dimensions, capacities, materials of construction, ratings, weights, power requirements and wiring diagrams, 60 filter information and information for all accessories. 61 62 OPERATION AND MAINTENANCE DATA 63 All operations and maintenance data shall comply with the submission and content requirements specified under section 64 GENERAL REQUIREMENTS. 65 66 Delete the following if there are no additional requirements. 67 In addition to the general content specified under GENERAL REQUIREMENTS supply the following additional 68 documentation: 1 DFD Project No. 2 23 54 00-1 1 1. [A/E and commissioning provider to define detailed operation and maintenance data requirements for 2 equipment specifications added to this section.] 3 4 WARRANTY 5 Furnace primary and secondary heat exchangers warranted for 20 years under normal use and maintenance. Remainder 6 of furnace components warranted for 1 year from date of start up. 7 8 9 10 PART 2 PRODUCTS 11 12 FURNACES 13 Manufacturers: Bryant, Carrier, Lennox, Trane or York. 14 This specification is for a sealed combustion condensing type furnace. 15 Direct vent, sealed combustion, condensing type AGA certified for use with [natural][propane] gas. Minimum annual 16 fuel utilization efficiency (A.F.U.E.) of 91. All ratings are to be certified by GAMA. All wiring shall comply with the 17 National Electrical Code. 18 19 22 gauge steel casing with baked enamel finish or prepainted galvanized steel. Insulate casing back and side panels 20 with foil faced fiberglass insulation. 21 22 Construct primary heat exchanger of aluminized steel. Construct secondary heat exchanger of stainless steel with 23 aluminum fins or of polypropylene laminated steel. Aluminized steel multi-port in-shot burner with hot surface or 24 electronic spark ignition, approved for vertical or sidewall venting. 25 26 AGA listed gas controls including manual main shutoff valve, double automatic gas valves for redundancy and gas 27 pressure regulator. 28 29 Centrifugal type blower fan statically and dynamically balanced with multiple speed, direct drive or belt drive fan 30 motor. Provide low energy induced draft blower for heat exchanger prepurge and combustion gas venting. 31 32 Provide unit with 2” thick 30% efficient disposable type panel air filter and filter holding rack with a maximum filter 33 face velocity of [ ] fpm. 34 Determine what filter pressure drop is acceptable for the system design. Design or specify a filter 35 arrangement that will allow for sufficiently low filter face velocities. 36 37 Provide solid state integral control unit with all necessary controls and relays including but not limited to: 38 -Pressure switch for airflow of flue products through furnace and out vent system 39 -Rollout switch with manual reset to prevent overtemperature in burner area 40 -Electronic flame sensor 41 -Blower access safety interlock 42 -Timed blower start after main burners ignite 43 -Factory installed 24 v transformer for controls and thermostat 44 -LED’s to indicate status and to aid in troubleshooting 45 46 For combination heating/cooling units include the following. 47 Provide unit with matching cased "A" configuration cooling coil for upflow units, "V" configuration cooling coil for 48 downflow units, and vertical flat face configuration cooling coil for horizontal units. 49 50 Minimum 1/2" OD seamless copper tubing mechanically bonded to heavy ripple edged aluminum fins with thermal 51 expansion valve, holding charge and copper tube stubs for field piping. 52 53 Non-corrosive stainless steel or polymer drain pan with 3/4" NPT drain connection. 54 55 20 gauge steel Coil casing with baked enamel finish and fiberglass insulation. 56 57 [Refer to Sections [23 09 24][23 09 23][23 09 14 OR 23 09 15] for temperature control work.] 58 59 If temperature controls are not included elsewhere in the documents specify all control work under this 60 section by deleting the above sentence and editing the following. If temperature controls are included in 61 other sections then delete the following. 62 63 [This Contractor shall provide all temperature control and interlocking necessary to perform the specified control 64 sequence. All wiring is to be in conduit in accordance with Division 26 00 00 - Electrical. All relays, transformers and 65 controls are to be in enclosures. 66 67 Provide a 7 day programmable thermostat with 2 occupied periods per day, automatic changeover, separate heating and 68 cooling set points for both occupied and unoccupied modes. Provide auxiliary controls on sub-base to open minimum 69 outside air damper during occupied mode. Equal to Honeywell model T7300 with Q7300 sub-base. 70 1 DFD Project No. 2 23 54 00-2 1 Provide lockable thermostat guards in public spaces. 2 3 During occupied mode run the supply fan continuously, open the outside air damper and cycle the cooling or heating as 4 required to maintain occupied space temperature cooling or heating set point. During unoccupied mode close the 5 outside air damper and cycle the supply fan and cooling or heating as required to maintain unoccupied cooling or 6 heating space temperature set point.] 7 8 9 PART 3 EXECUTION 10 11 INSTALLATION 12 13 Install units as shown on plans, as detailed and according to the manufacturer’s installation instructions. 14 15 Pipe vents from gas regulator to outside (where regulators are provided). 16 17 [Install remote panels and thermostats where indicated on the drawings. Provide all wiring between remote 18 panels/thermostats and the gas fired item.] 19 Coordinate all power wiring with the electrical consultant. Coordinate all temperature controls with the 20 temperature controls specifications. Clearly identify and coordinate which trade is providing the various 21 wiring. 22 23 Show routing, sizing and termination of all gas ,gas vent , combustion air and vent piping on the drawings. 24 25 Coordinate exterior wall/roof penetrations with the building wall/roof type and configuration. 26 27 FURNACES 28 Install on concrete housekeeping pad, steel stand or suspend unit from structure as indicated on the drawings. Pipe 29 condensate to floor drain. 30 31 Provide schedule 40 PVC, ASTM D1785 combustion air and vent piping and fittings with solvent welded joints as 32 indicated on the drawings. Terminate as recommended by the furnace manufacturer. 33 34 CONSTRUCTION VERIFICATION 35 Contractor is responsible for utilizing the construction verification checklists supplied under specification Section 23 08 36 00 in accordance with the procedures defined for construction verification in Section 01 91 01 or 01 91 02. 37 38 FUNCTIONAL PERFORMANCE TESTING 39 Contractor is responsible for utilizing the functional performance test forms supplied under specification Section 23 08 40 00 in accordance with the procedures defined for functional performance testing in Section 01 91 01 or 01 91 02. 41 42 AGENCY TRAINING 43 All training provided for agency shall comply with the format, general content requirements and submission guidelines 44 specified under Section 01 91 01 or 01 91 02. 45 46 Contractor to provide factory authorized representative and/or field personnel knowledgeable with the operations, 47 maintenance and troubleshooting of the system and/or components defined within this section for a minimum period of 48 [XX] hours. 49 50 51 END OF SECTION 52

1 DFD Project No. 2 23 54 00-3