Nortrax David Manchester Road, Ottawa FAN ASSISTED COPPER TUBE BOILERS 21 May 2014 Project: PART 1 - GENERAL...

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1 21 May 2014 PART 1 - GENERAL WORK INCLUDED QUALITY ASSURANCE APPROVALS... 1 PART 2 - PRODUCTS HEATING BOILERS BOILER SEQUENCE CONTROL... Error! Bookmark not defined BOILER SCHEDULE... Error! Bookmark not defined. PART 3 - EXECUTION INSTALLATION STARTUP... 4 INDEX

2 21 May 2014 Page 1 PART 1 - GENERAL 1.1. WORK INCLUDED.1 Comply with Division 1, General Requirements and all documents referred to therein..2 Provide all labour, materials, products, equipment and services to supply and install the heated water boilers and controls indicated on the Drawings and specified in this Section of the Specifications QUALITY ASSURANCE.1 Manufacture and install in accordance with governing codes and regulations and the following reference standards:.1 Provincial Boiler and Pressure Vessels Act.2 CSA Standard B.51 (latest edition): Code for the construction and Inspection of Boilers and Pressure Vessels.3 ASME: Boiler and Pressure Vessel Code, Section IV.4 Canadian Electrical Code.5 Piping to ANSI Standards.6 Provincial Environmental and Energy Acts.7 CSA/CGA B149 Natural Gas Installation Code.2 Provide factory tests to confirm specified construction, and proper operation of unit APPROVALS.1 Obtain and pay for Environmental Protection Act Permit..2 Submit to the Owner Canadian registration number of the unit attesting to units meeting the requirements of the Authorized Inspection Agency. PART 2 - PRODUCTS 2.1. HEATING BOILERS.1 Provide natural gas fired hydronic hot water heating boilers of proven and certifiable low NOx design with ASHRAE 90.1 approval. Boilers shall be, constructed in accordance with ASME standards complete with approval stamp for 160 psi working pressure..2 Boilers shall be certified and listed by CSA International under the latest edition of the harmonized ANSI Z21.13 test standard for the U.S. and Canada and shall bear a CGA Seal as a hydronic boiler..3 Meet performance requirements shown on schedules. Minimum efficiency 85%..4 Provide boilers constructed as follows:

3 21 May 2014 Page 2.1 The boiler shall bear the ASME "H" stamp for 160 psi working pressure and shall be National Board listed. There shall be no banding material, bolts, gaskets or "O" rings in the header configuration. The 316L stainless steel combustion chamber shall be designed to drain condensation to the bottom of the heat exchanger assembly. A built-in trap shall allow condensation to drain from the heat exchanger assembly. The complete heat exchanger assembly shall carry a ten (10) year limited warranty..2 The boiler shall be certified and listed by C.S.A. International under the latest edition of the harmonized ANSI Z21.13 test standard for the U.S. and Canada. The boiler shall comply with the energy efficiency requirements of the latest edition of the ASHRAE 90.1 Standard and the minimum efficiency requirements of the latest edition of the BTS2000 Standard. The boiler shall operate at a minimum of 94% thermal efficiency at full fire. The boiler shall operate up to 98% thermal efficiency with return water temperatures at 100 F or below. The boiler shall be certified for indoor installation. The boiler s Thermal Efficiency shall be verified through third party testing by the Hydronics Institute Division of AHRI and listed in the AHRI Certification Directory..3 The boiler shall be constructed with a heavy gauge steel jacket assembly, primed and pre-painted on both sides. The combustion chamber shall be sealed and completely enclosed, independent of the outer jacket assembly, so that integrity of the outer jacket does not affect a proper seal. A burner/flame observation port shall be provided. The burner shall be a premix design and constructed of high temperature stainless steel with a woven metal fiber outer covering to provide modulating firing rates. The boiler shall be supplied with a gas valve designed with negative pressure regulation and be equipped with a variable speed blower system, to precisely control the fuel/air mixture to provide modulating boiler firing rates for maximum efficiency. The boiler shall operate in a safe condition at a derated output with gas supply pressures as low as 4 inches of water column. The boiler shall be equipped with leveling legs..4 The boiler shall utilize a 24 VAC control circuit and components. The control system shall have an electronic display for boiler set-up, boiler status, and boiler diagnostics. All components shall be easily accessed and serviceable from the front and top of the jacket. The boiler shall be equipped with; a temperature/pressure gauge, high limit temperature control certified to UL353, ASME certified pressure relief valve, outlet water temperature sensor, return water temperature sensor, a UL 353 certified flue temperature sensor, outdoor air sensor, low water flow protection and built-in adjustable freeze protection..5 The boiler shall feature the Smart System control with a Multi-Colored Graphic LCD display with Navigation Dial and Soft Keys for, password security, three loop temperature setpoints with individual outdoor air reset curves, pump delay with adjustable freeze protection, pump exercise, and USB PC port connection. The boiler shall be capable of controlling a variable speed boiler pump to keep a constant Delta T at all modulation rates. The boiler shall have the capability to accept a 0-10 VDC input connection for BMS control of modulation or setpoint, enable disable of the boiler, variable system pump signal and a 0-10VDC output of boiler modulation rate. The Boiler shall have a built-in Cascade with sequencing options for lead lag or efficiency optimized modulation logic, with both capable of rotation while maintaining modulation of up to eight boilers

4 21 May 2014 Page 3 without utilization of an external controller. Supply voltage shall be 120 volt / 60 hertz / single phase..6 The boiler shall be equipped with two terminal strips for electrical connection. A low voltage connection board with 42 data points for safety and operating controls, i.e., Auxiliary Relay, Auxiliary Proving Switch, Alarm Contacts, Runtime Contacts, Manual Reset Low Water Cutoff, Flow Switch, High and Low Gas Pressure Switches, Tank Thermostat, Three Wall Thermostat/Zone Controls, System Supply Sensor, Outdoor Sensor, Building Management System Signal, Modbus Control Contacts and Cascade Control Circuit. A high voltage terminal strip shall be provided for supply voltage. The high voltage terminal strip plus integral relays are provided for independent pump control of the System pump, the Boiler pump and the Domestic Hot Water pump..7 The boiler shall be installed and vented with a:.1 Direct Vent Sidewall system with a horizontal sidewall termination of both the vent and combustion air. The flue shall be PVC, CPVC or Stainless Steel sealed vent material terminating at the sidewall with the manufacturers specified vent termination. A separate pipe shall supply combustion air directly to the BOILER from the outside. The air inlet pipe may be PVC, CPVC, ABS, Galvanized, Dryer Vent, or Stainless Steel sealed pipe. The air inlet must terminate on the same sidewall with the manufacturer s specified air inlet cap. The BOILER s total combined air intake length shall not exceed 100 equivalent feet. The BOILER s total combined exhaust venting length shall not exceed 100 equivalent feet..8 Additional standard equipment shall include a flow switch, high temperature limit control, an air pressure switch to monitor low air and blocked flue conditions, low voltage transformer with a five amp circuit breaker for the 24 volt control circuit, a 50 PSI ASME pressure relief valve and a temperature / pressure gauge. All units must be factory tested and complete with a quality test report shipped with the unit. Supply Voltage to boiler at 120 volts..9 All components shall be easily accessed and serviceable and have multi-pin plug in type connectors to ease service, troubleshooting and lower removal and replacement costs. Indicating lights shall be provided for power on, pre purge, trial for ignition, flame failure, low air and individual stage operation. The ignition module shall provide status indication visible from the unit control panel. PART 3 - EXECUTION 3.1. INSTALLATION.1 Follow manufacturer's erection, operation and maintenance instructions..2 Provide wiring between boiler control panels and sequence controller. Iinstall and wire controls for boilers and any loose control components.3 Provide, to the appropriate trade, steel angle inserts to be placed in the housekeeping pads for the support of the boilers.

5 21 May 2014 Page 4.4 Pipe relief valves and drains from each unit to funnel floor drain or hub drain. Make required piping, electrical, venting, and control connections STARTUP.1 Manufacturers representative to provide start-up assistance service for contractor under the direction of the consultant complete with flue gas analysis showing NOx emissions for submission with start up report..2 System commissioning shall be the responsibility of the contractor and payment for any equipment commissioning shall be the responsibility of the contractor..3 Manufacturers representative to also provide for one half day (4 hours) of maintenance and operating instructions for the owners representative and include for training on troubleshooting potential problems. Provide engineering consultant adequate notice prior to start-up assistance and instruction sessions and provide a written start up report of installation results. END OF SECTION