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Resumen del manual
G. Firing Mode 1. For models 992BE, provide three-stage firing control of the gas input to the boiler. 2. For models 1262BE-2342BE, provide four-stage firing control of the gas input to the boiler. H. Boiler Diagnostics 1. Provide external LED panel displaying the following boiler status/faults: a. Power on – Blue b. Call for heat – Amber c. Flow – Green d. Stages 1-4 – Green e. Fans 1-3 proven – Green f. Ignition fault – Red g. Safety fault – Red 2. Provide internal circuit board with fault history, indicating the following safety faults by LED signal: a. System status b. Manual reset high limit c. Auto reset high limit (optional) d. Low water cut-off (optional) e. Blocked vent f. Low gas pressure switch g. High gas pressure switch (optional) h. Controller alarm (optional) i. Flow switch j. Air pressure k. Factory option l. External interlock m. Cold Water Start/Cold Water Run (optional) n. Ignition lock-out 3. A Central Point Wiring board with diagnostic LED’s indicating the status of each relay. 4. Provide ignition module indicating the following flash codes by LED signal and displayed on LCD display: a. 1 flash – low air pressure b. 2 flashes – flame in the combustion chamber w/o CFH c. 3 flashes – ignition lock-out (flame failure) d. 4 flashes – low hot surface igniter current e. 5 flashes – low 24VAC f. 6 flashes – internal fault (replace module) I. Combustion Chamber: The lightweight, high temperature, multi-piece, interlocking ceramic fiber combustion chamber liner shall be sealed to reduce standby radiation losses, reducing jacket losses and increasing unit efficiency. J. Venting 1. When routed vertically, the boiler’s flue material and size shall meet or exceed the requirements specified for Category II in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 latest edition. 2. When routed horizontally, the boiler(s) flue material and size shall meet or exceed the requirements as specified for Category III in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 latest edition. 3. The boiler(s) shall be ducted combustion air ready. K. Cabinet 1. The corrosion-resistant galvanized steel jackets shall be finished with a baked-on epoxy Project Name / Date Division 23 52 33.13 - 3 powder coat which is suitable for outdoor installation, applied prior to assembly for complete coverage, and shall incorporate louvers in the outer panels to divert air past heated surfaces. 2. The boiler(s), if located on a combustible floor, shall not require a separate combustible floor base. 3. The boiler(s) shall have the option of venting the flue products either through the top or the back of the unit. 4. Combustion air intake shall be on the left side of the cabinet, right side optional. L. Boiler Operating Controls 1. The boiler(s) shall feature an optional four-stage digital controller with adjustable outdoor reset, mounted and wired. 2. Water and air temperature sensors shall be shipped loose for field installation by installing contractor. Specifier Note: The remaining items in this section are options. Delete those that are not being specified. IMPORTANT: The Cold Water Start and Cold Water Run Systems cannot be used on the same boiler. The Low Gas Supply Pressure and FlexGas Manifolds also cannot be used on the same boiler. M. Boiler Pump - Refer to Equipment Schedule N. SureRack™ Boiler Stacking Kit 1. The boilers shall be stacked directly one on top of the other, without offset, to minimize footprint. O. Cold Water Start System 1. The boiler(s) shall be configured with a cold water start automatic proportional bypass system that ensures the boiler will experience inlet temperatures in excess of 120.F in less than 7 minutes to avoid damaging condensation. The unit will automatically shut down if the inlet temperature is not achieved within the 7 minute time frame. 2. The cold water start system shall be configured with a modulating three-way valve that is controlled by a system-matched PID controller. The PID controller temperature sensor shall be located in the inlet header of the boiler. 3. The control shall have a temperature setting dial located on the face of the board. The temperature range of the dial shall be 105.F to 120.F. The PID Logic shall be capable of limiting system overshoot to a maximum of 10.F on initial start-up or call-for-heat. 4. The cold water start system shall be completely wired and mounted at the factory. 5. The control shall have the following diagnostic LED’s: a. Call for heat b. Start-up mode c. Inlet temperature error d. Sensor out of range 6. The controller shall have alarm contacts. P. Cold Water Run System 1. The boiler(s) shall be configured with a cold water run automatic proportional bypass system that ensures the boiler will experience inlet temperatures in excess of 120.F in less than 7 minutes to avoid damaging condensation. The unit will automatically shut down if the inlet temperature is not achieved within the 7 minute time frame. 2. The cold water run system shall be configured...
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