HP SU-2A User Manual

Manual for: SU-2A Gas Burner

50,000 BTU/H to 250,000 BTU/H

The burner shall be used only with NATURAL GAS or LP GAS as specified on the nameplate.

Warning: If the following instructions are not followed exactly, a fire or explosion may result, causing property damage, personal injury or death.

• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical appliance.

• Do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone.

• Follow the gas supplier’s instructions.

•

If you cannot reach your gas supplier, call the fire department.

• A qualified installer, service agency or the gas supplier must perform installation and service.

• All installations must be made in accordance with all state and local codes, which may differ

from instructions in this manual.

• The installer should inform and demonstrate to the user the correct operation and maintenance of the appliance.

• The installer shall also inform the user of hazards of flammable liquids and vapors and shall remove such liquids and vapors from the vicinity of the burner.

• The installation adjustment data trap, or label supplied, shall be filled in and affixed to the burner or the covered appliance.

These instructions should be affixed to the burner or adjacent to the heating appliance

NYC MEA # 382-03-E

–

Massachusetts Plumbing Board G1-0903-40:09/03/2004

Manufactured by Heat Wise, Inc.

1528 Rocky Point Road, Middle Island, NY 11953

rev 2004-2

Chart 1: Natural Gas and LP

Length

Model

SU-2A

- Control System: Fenwal Model 2466H936-111 with 15 Second Pre-Purge and 60 Second Post-Purge OR

Honeywell S89F with 34 second Pre-Purge.

- The system uses a remote ignition system with a separate Ignition Transformer.

- Gas Valve: VR8205A 2008 or VR 8305 P with step opening (special applications).

of Flame Tube

4 ¼”

Firing Rate Burner

Min BTU/H

50,000 250,000

Max BTU/H

Primary Electric Input

120 Volt 60 Hz 1 Ph

Secondary Electric Input

24 Volts

Total Watts

150

Max

Total Amps

3 or less

Gas Conn.

½”

BURNER DESCRIPTION

The SU-2A Gas Burner is a fully automatic, flame retention burner and is suitable for combustion of natural gas or LP. Changing orifices alters the firing rate. The combustion air can be adjusted for proper O2 or CO2 by the dial located on top of the burner housing, which allows the air to flow more or flow less within the burner. Two electrodes act as a sparker and a flame rod (See Fig. 1). Flame rectification by this flame rod monitors the continued presence of the burner flame. With three trials for ignition consistency (with Fenwal control), trouble free, safe operation is achieved.

control the appliance; 2) DO NOT shut off the control switch to the pump or blower

gas-burning appliance. The conversion must conform to local codes. In the absence of such codes, the American National Standard for the Installations of gas conversion burners, ANSI Z21.17-1984, Z21.8A-1990 and the National Fuel Gas Code ANSI 223.1-1992 or current standards should be applied.

Warning: Should overheating occur, 1) shut off the manual gas shut off valve to

This power gas burner is designed to convert oil and/or coal fired boilers and furnaces to a

Fig. 1 Electrode and Flame Sensor Dimensions

(

)

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 appliance for servicing and proper operation of the burner.

CONVERTING COAL TO GAS

When converting a coal appliance to gas, the coal firing chamber or the ash pit chamber may be used as a gas firing chamber, provided the flame does not impinge on the walls of the appliance (see Chart 2). It is important to allow adequate clearance around the appliance for servicing and proper operation of the burner.

Input Rate

per hour Height

50,000 to

80,000 to

150,000 9" 8" 9" 8"

Chart 2: Minimum Firing Chamber Dimensions

BTU Length Width Diameter Minimum

80,000

Rectangular Round

150,000 to

180,000 11" 8" 11" 8"

180,000 to

200,000 14" 8" 14" 12"

200,000 to

250,000

15"

AIR FOR COMBUSTION

15"

13"

If the boiler or furnace room is unusually tight, or if the house has a ventilation fan, it is recommended that the combustion air be supplied to the furnace room through intakes from the outside of the building. The intakes must terminate facing down in order to avoid obstruction from rain, snow, leaves, etc. Openings must have one square inch of free area per 10,000 BTU input rate (see Example 1). Follow the heat exchanger manufacturer's recommendations for installing louvers, etc.

Example 1: 150,000 BTU/hr firing rate

150 000

, / *

( )

BTU hr

10000

, /

BTU hr

in=

CHIMNEY REQUIREMENTS

The chimney should extend

2) and be free in a cause a down draft. The chimney should be lined as required by the local Gas Company or local codes. Some utilities require new chimney liners for all gas installations. Use a corrosion resistant chimney liner (approved for gas service) of the same size as the vent pipe.

radius of 30’

at least 3’

of objects such as tree limbs, other buildings, etc, which may

above a flat roof or the highest roof ridge (see Fig.

Fig. 2 Chimney and Fresh Air Dimensions

tube from burning off. Slide the blast tube into the boiler to

20 setscrews. Seal

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 (UL) listed double swing draft regulator must be used.

installations.

When the burner is used as a conversion burner, draft over fire should be maintained

A movable internal damper is not permitted on gas

as –0.02” W.C. by adjusting the regulator when the burner is fired. The installer should follow the barometric draft regulator manufacturer’s instructions for complete details for installations and adjustments. The vent pipe should extend only to (but not beyond) the inside wall of the chimney. The sizing below does not apply on any factory listed packaged units.

Chart 3: Vent Pipe Sizing

Input per Hour Up to 120,000 BTU 120,000 to 160,000 BTU 160,000 to 250,000 BTU

Draft Hood and Flue Pipe Sizes 5” diameter 6” diameter 7” diameter

INSTALLING THE BURNER

If the burner being installed is a conversion burner, use a prefabricated chamber or build a firing chamber that can withstand 2000o F (See Chart 2 on page 3). Measure the boiler or furnace mounting plate to determine the flame tube insertion required. Deduct ¼” from the total length and tighten the flange on the flame tube with the deducted insertion depth. The ¼” deduction will prevent the tip of the flame tube from burning off. Install the burner on the unit and then tighten the nuts on the flange so that the burner is permanently secured. Seal off any free openings with high temperature cement.

Refer to the pictures below to determine which flange is installed on the SU-2A

Picture 1: STANDARD FLANGE:

Install the gasket and the Standard flange to the boiler. Tighten the bolts. Measure the boiler or furnacemounting plate to determine the flame tube insertion depth required and make a mark on the tube (with a marker or screwdriver). Deduct ¼” from the total length and tighten the flange on the flame tube with the deducted insertion depth. The ¼” deduction will prevent the tip of the flame

the proper depth and tighten the four ¼”off any free openings with either high temperature cement or high temperature silicone.

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