UTICA BOILERS SVB Series

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

This document is the Installation, Operation & Maintenance Manual for the Utica Boilers SVB Series 3 Gas-Fired Hot Water Induced Draft Boilers.

Function Description:

The Utica Boilers SVB Series 3 are gas-fired hot water induced draft boilers designed for residential and commercial heating applications. They are classified as Category I boilers, meaning they operate with a non-positive vent static pressure and with a vent gas temperature that may cause condensation in the vent. The boilers are equipped with an induced draft blower to assist in venting flue gases. They are designed to provide hot water for space heating and can be integrated into various heating systems, including those with zone control valves or refrigeration systems. The control module continuously monitors boiler water temperature and fires or shuts off the burner based on this data, aiming to satisfy the thermostat's call for heat efficiently. A feature is included to save energy by reducing boiler water temperature as the heating load decreases, with an override for external energy management systems or specific applications.

Important Technical Specifications:

Models: SVB-2, SVB-3, SVB-4, SVB-5, SVB-6, corresponding to 2, 3, 4, 5, and 6 sections respectively.
Fuel Type: Natural Gas or Propane.
Working Pressure: Tested for 50 psi ASME working pressure.
AFUE (Annual Fuel Utilization Efficiency): 84.0% to 84.4% across all models.
Input Ratings (Btu/hr): Ranging from 42,500 (SVB-2) to 187,500 (SVB-6) at sea level to 2,000 feet.
Heating Capacity (Btu/hr): Ranging from 36,000 (SVB-2) to 158,000 (SVB-6).
Net AHRI Rating Water (Btu/hr): Ranging from 31,000 (SVB-2) to 135,000 (SVB-6).
Vent Diameter (Category I - To Chimney): 4 inches for all models.
Vent Diameter (Category III - Horizontal Vent): 3 inches for SVB-2, SVB-3, SVB-4, SVB-5; 4 inches for SVB-6.
Supply & Return Tappings: 1-1/4" NPT for all models.
Natural Gas Inlet: 1/2" NPT for all models.
Relief Valve NPT: 3/4" NPT for all models.
Drain Valve NPT: 3/4" NPT for all models.
Heating Water Content: Ranging from 1.75 gal (6.6 L) for SVB-2 to 6.75 gal (25.6 L) for SVB-6.
Boiler Weight (less packaging): Ranging from 225 lbs (102.1 kg) for SVB-2 to 431 lbs (195.5 kg) for SVB-6.
Dimensions:
- Width: 11" (279 mm) for SVB-2 to 24" (610 mm) for SVB-6.
- Height: 29" (737 mm) for all models.
- Depth: 23-1/4" (591 mm) for all models.
Electrical Supply: Separate 115 volt circuit, 15 ampere protective device.
Thermostat: 24 volt thermostat, connects to yellow low voltage wires labeled T-T. Heat anticipator setting: 0.2 amps.
Minimum Design Return Water Temperature: 130°F (to prevent condensation).
Minimum High Limit Setting: 150°F.
High Altitude Operation: Reduced input rate of 4% for every 1,000 feet above 2,000 feet sea level (USA). Certified field conversion kits available for 2,000-4,500 feet (Canada), reducing input by 10%.

Usage Features:

Installation Flexibility: Can be installed on non-combustible floors (special base required for combustible floors). Minimum clearances to combustible construction are specified (e.g., 6" top/rear/left, 8" right, 18" front for alcove).
Piping Options: Supports typical forced hot water piping and systems with zone control valves. Bypass piping is suggested for low design water temperature systems (below 150°F) or large water content systems to prevent condensation.
Ventilation & Combustion Air: Requires adequate air openings for proper combustion and ventilation, adhering to National Fuel Gas Code or Natural Gas and Propane Installation Code requirements.
Venting Systems: Supports Category I chimney venting (with 3"x4" increaser) and Category III horizontal induced draft venting. Various UL Listed stainless steel vent pipe materials are approved (Z-Flex Z-Vent, Heat-Fab Saf-T-Vent, Flex-L Star-34, ProTech FasNSeal). Horizontal venting requires a downward slope of 1/4" per foot (21 mm/m) away from the boiler to prevent condensate collection. Optional power venters (Field Controls SWG-4, SWG-5) are available for sidewall venting, offering flexibility for longer vent runs or challenging wind conditions.
Gas Supply: Requires proper sizing of gas piping and leak testing before operation. Minimum and maximum supply pressures, as well as manifold pressure, are specified for natural gas and propane.
Control Module: Features an integrated control module with a display for status items and parameters (setpoint, differential, sensor temperature, error codes). Settings can be adjusted (setpoint 130-220°F, differential 10-30°F).
Safety Features: Includes a safety relief valve (to be installed upright), pressure switch for induced draft blower operation, and safety shutdown for ignition system. The control module provides diagnostic error codes for troubleshooting various issues (e.g., pressure switch failure, flame sensing issues, temperature sensor failure, line voltage errors, lockouts).
Energy Saving Feature: Reduces boiler water temperature as heating load decreases, with an override for specific conditions (external energy management, non-space heating use, modular systems >300,000 Btu/hr, tankless coil).

Maintenance Features:

Annual Visual Check: Recommended for pilot and main burner flames at the beginning of each heating season.
Safety Relief Valve Test: Test annually according to manufacturer's instructions.
Expansion Tank (Non-diaphragm) Maintenance: Instructions provided for correcting waterlogging or excess air.
Boiler Flue Passages: Recommended annual inspection and cleaning by a qualified service agent. Cleaning involves removing burners, pilot, vent pipe, jacket panels, draft diverter, and cerafelt gasket strips, then cleaning passageways with a wire brush and vacuum.
Burner Maintenance: Verify all flame ports are open and clear.
Vent Pipe Inspection: Check monthly for leaks and obstructions. Periodically clean the screen in the vent terminal for horizontal venting.
Water System: Drain completely if the system is out of service during freezing weather.
Blower: Permanently lubricated ball bearing construction, no lubrication required.
Circulator Pump Isolation Valves: Operate manually once or twice per year to prevent sticking.
Low Water Cutoff(s): Inspect field-sourced low water cutoffs annually or as recommended by the manufacturer. Flush float-type low water cutoffs.
Housekeeping: Keep the boiler area clear of combustible materials, flammable vapors, and obstructions to combustion and ventilation air.
Troubleshooting Guide: Comprehensive guide with possible causes and solutions for common issues (e.g., no heat, noisy burner, relief valve leaking) and detailed error codes from the control module for advanced diagnostics.
Ignition System Checks: Step-by-step procedure for checking ignition cable, grounding, spark ignition circuit, and pilot/main burner light-off. Instructions for adjusting pilot flame.