Page 2 - Chart 1: Natural Gas and LP; BURNER DESCRIPTION
2 Chart 1: Natural Gas and LP Firing Rate Burner Model Length of Flame Tube Min BTU/H Max BTU/H Primary Electric Input Secondary Electric Input Total Watts Total Amps Gas Conn. SU-2A 4 ¼” 50,000 250,000 120 Volt 60 Hz 1 Ph 24 Volts 150 Max 3 or less ½” - Control System: Fenwal Model 2466H936-111 wit...
Page 3 - CONVERTING OIL TO GAS; CONVERTING COAL TO GAS; servicing and proper operation of the burner.; AIR FOR COMBUSTION; BTU hr; Chart 2: Minimum Firing Chamber Dimensions; Rectangular
3 CONVERTING OIL TO GAS Before attempting the gas conversion, check to insure the heating system is properly sized for the total heating demand and the entire system is in good operating condition, including the fire chamber and flue passages. It is important to allow adequate clearance around the a...
Page 4 - CHIMNEY REQUIREMENTS; The chimney should extend; at least 3’ above a flat roof or the highest roof ridge (see Fig.; Fig. 2 Chimney and Fresh Air Dimensions
4 CHIMNEY REQUIREMENTS The chimney should extend at least 3’ above a flat roof or the highest roof ridge (see Fig. 2) and be free in a radius of 30’ of objects such as tree limbs, other buildings, etc, which may cause a down draft. The chimney should be lined as required by the local Gas Company or ...
Page 5 - VENT PIPE AND DRAFT HOOD SIZES; A movable internal damper is not permitted on gas; Chart 3: Vent Pipe Sizing; INSTALLING THE BURNER
5 VENT PIPE AND DRAFT HOOD SIZES Refer to Chart 3 to properly size the flue pipe. If the flue pipe exceeds 10’ in length (including elbows), use the next larger diameter flue pipe and draft hood. If a draft regulator is required, any Canadian Standards Association (CSA) or Underwriter’s Laboratory (...
Page 6 - GAS SERVICE & PIPE CAPACITY; Nominal diameter of pipe in inches; elbow counts as 3’ for the purpose of these calculations
6 GAS SERVICE & PIPE CAPACITY Before connecting the burner to the gas supply, insure that the gas pipes and service meter are large enough to permit the additional load of the gas burner (see Chart 4). Chart 4: Pipe Capacity Table*( x 1,000 BTU’s) Nominal diameter of pipe in inches Pipe Length**...
Page 7 - do not use; Please make sure you conform to local and state codes.
7 It is advisable to run a separate gas line from the meter to the gas burner to avoid pressure drops. Refer to the above Pipe Capacity table for the correct sizes. ALL PIPING MUST CONFORM TO LOCAL CODES. Use black steel pipe and malleable fittings ( do not use cast iron parts) with a suitable pipe ...
Page 8 - ORIFICE INSTALLATION; minimum is; Note: The manifold pressure may vary for OEM packaged units.; Chart 5: Burner Orifice Sizing For Natural Gas And LP*; INSTALLING THE CHIMNEY LINER, DRAFT DIVERTER AND
8 ORIFICE INSTALLATION All burners are equipped with an orifice set at the minimum firing rate (except for OEM packaged units). Drilling the orifice increases the firing rate. To drill the orifice, first open the union and then unscrew the orifice from inside the union. Determine the proper orifice ...
Page 9 - ELECTRIC WIRING; All applicable local codes should be followed as well.; Fig. 4 Wiring Diagram for Fenwal 2466H; SEQUENCE OF OPERATIONS
9 ELECTRIC WIRING These gas burners are manufactured for use with 120 volt, 60 cycle, single-phase electric current. The installation must comply and be grounded in accordance with the National Board of Fire Underwriters and National Electric Code ANSI/NFPA No. 70-1987 (or the latest addition). All ...
Page 10 - Fig. 5 Wiring Diagram for Honeywell S89F; Honeywell S89F; Volt transformer powers the gas valve, allowing the fuel to flow.
10 Fig. 5 Wiring Diagram for Honeywell S89F SEQUENCE OF OPERATIONS Honeywell S89F 1. Limits close. 2. Blower motor starts as the 24 Volt transformer powers the airflow switch. 3. Power from the airflow switch to the S89F control initiates 34 second pre-purge. 4. At the end of the pre-purge, the spar...
Page 11 - LIGHTING INSTRUCTIONS; To light the SU-2A Gas Burner; BURNER OPERATION; Use a combustion analyzer and record the; BURNER OPERATION: Record the Readings at Steady State
11 LIGHTING INSTRUCTIONS To light the SU-2A Gas Burner 1. Set the thermostat to the lowest temperature 2. The control knob on the gas valve should be in the “OFF” position for at least five minutes. 3. Rotate the control knob counter- clockwise to the “ON” position and set the thermostat to the desi...
Page 12 - When to adjust the Air
12 PICTURE 4: HEAD AND AIR ADJUSTMENT Head Air When to adjust the Air The air shutter is a mechanical shutter. Do NOT over crank the air shutter. General rule: if the CO 2 (Carbon Dioxide) is too low, then close the air shutter. If the CO 2 is too high, then open the air shutter. Note: Do NOT set th...
Page 13 - There are three factors to operate the gas burner properly:; Condition
13 Trouble shooting: There are three factors to operate the gas burner properly: 1. Electricity {(main Power 120V/60 Hz /1 Ph)( secondary 24V)} 2. Gas flow (Incoming pressure should be 10” w.c. with proper gas line without pressure drop during burner operation). 3. Combustion air. Check these three ...
Page 15 - Maintenance Instructions:; TO BE FIXED/ATTACHED NEAR BURNER; bearings have been permanently lubricated.
15 Maintenance Instructions: TO BE FIXED/ATTACHED NEAR BURNER Once a year, a qualified service agency needs to be contracted for other than routine maintenance. 1. The blower motor is the only moving part. It does not require lubrication, since the ball bearings have been permanently lubricated. 2. ...
