User guide

ManualsBrandsMidco ManualsEquipmentUnipower A-Series

Installation and Service Instructions

Midco International Inc.

4140 West Victoria Street Chicago, Illinois 60646

tel 773.604.8700 fax 773.604.4070 web www.midco-intl.com

199

8449-11

Printed in U.S.A.

In the United States, installation must conform with local codes or

in the absence of local codes, with the National Fuel Gas

Code, ANSI Z223.1-latest edition available from American

National Standard Institute. Further reference should be made to

the recommendation of your fuel supplier.

In Canada, installation must conform with local codes or in the

absence of local codes, with Installation Codes for Gas

Burning Appliances and Equipment, CGA Standard

CAN/CGA 1-B-149.1 or 2. When the conversion burner is used

on a Forced Air Central Furnace, the two yellow and black

warning labels in the literature envelope shall be attached in

accordance with Installation Code, CGA Standard CAN/CGA

1-B149, Clause 5.4.4.4. Further reference should be made to

the recommendation of your fuel supplier.

WARNING: Additions, changes, conversions and service

must be performed by an authorized Midco

representative, service agency or the fuel supplier. Use

only MIDCO specified and approved parts.

INSTALLER:

Inform and demonstrate to the user the

correct operation and maintenance of the gas

utilization equipment. Inform the user of the hazards

of storing flammable liquids and vapors in the

vicinity of this gas utilization equipment and remove

such hazards. Affix this manual and associated

literature to the conversion burner.

CODE COMPLIANCE IS THE SOLE RESPONSIBILITY OF THE

INSTALLER.

USER:

Retain this manual for future reference. If other

than routine service or maintenance as described in this

manual and associated literature is required, contact a

qualified service agency. DO NOT ATTEMPT REPAIRS.

An inadvertent service error could result in a

dangerous condition.

Unipower A-Series

Gas Burners

BURNER

MODEL

BILL OF MAT'L

NUMBER

DATE CODE

WIRING DIAGRAM

PIPING DIAGRAM

START-UP INSTRUCTIONS

FOR SERVICE CONTACT:

name

address

phone

SSAAFFEETTYY IINNFFOORRMMAATTIIOONN TTEERRMMSS:: The following terms are used to identify hazards, safety precautions or special notations

and have standard meanings throughout this manual. When you see the safety alert symbol and one of the safety

information terms as shown below, be aware of the hazard potential.

WARNING: Signifies a hazard that could result in personal injury or death.

CAUTION: Identifies unsafe practices which would result in minor personal injury or product and property damage.

Warning: If the information in these instructions

is 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 switch;

do not use any phone in the building.

• Immediately call your gas supplier from

another building's phone. Follow the gas

supplier's instructions.

• If you cannot reach your gas supplier,

call the fire department.

Summary of content (12 pages)

PAGE 1
Installation and Service Instructions Unipower A-Series Gas Burners In the United States, installation must conform with local codes or in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1-latest edition available from American National Standard Institute. Further reference should be made to the recommendation of your fuel supplier.
PAGE 2
Part 1 Installation I Specifications Burner Style Flame Safeguard Power Type Instantaneous electronic type with flamerod detection (flame rectification). • Provides pre-purge and intermittent pilot operation on UL listed models up to 2500 MBH maximum input. • Provides pre-purge and interrupted pilot operation on UL listed models over 2500 MBH max. Pilot Spark Ignited Fuel Natural or Propane Gas to 14" W.C. Pressure Controls 120 Volt, 60 Hz., 1-Phase Burner Capacity Chart page 12 In U.S.A.
PAGE 3
III Preparation of the Heating Appliance Continued ■ Make sure that the boiler gauge glass is clean so that water level can be easily ascertained. The pop safety valve should be checked to see that it is in good operating condition. If an existing low water cut-off is to be used, make sure it is clean and functioning properly.
PAGE 4
IV Combustion Chamber Continued ■ For warm-air furnaces or Scotch Marine boilers with tubular combustion chambers, the combustion chamber length must be great enough to exceed the lengths given in Table 2 by at least 20%. ■ Combustion chamber proportions may be changed if necessary to avoid flame impingement on critical parts such as drop sections in cast iron boilers or the heat exchanger surfaces of a warmair furnace.
PAGE 5
IV Combustion Chamber Continued Detailed information is available on request. ■ Since firing door installations will generally leave no openings for flame observation, a peep sight must be installed in the burner mounting plate.
PAGE 6
IV Combustion Chamber Continued Figure 7: Conventional Boiler—Small Firebox Figure 8: Tubular Combustion Chambers Figure 9: Firing Door Installation in Three Pass Boiler 6
PAGE 7
V Chimney and Flue Pipe The chimney should be inspected for unsafe conditions such as deteriorated masonry and excessive soot or other blockage or potential blockage. ■ All combustion air is furnished by the Unipower burner, and therefore the only function of the chimney is to vent the flue products. ■ For the conventional appliances where a slight negative pressure in Maximum Flue the combustion chamber is desirable, the chimney and flue pipe sizes Input Pipe given in Table 3 are recommended.
PAGE 8
VI Electrical ■ The burner when installed, must be wired and grounded in accordance with local codes or in the absence of local codes, with the National Electric Code ANSI/NFPA No. 70-latest edition. In Canada, refer to CSA Standard C22.1, "Canadian Electrical Code Part 1" and/or local codes. Refer to the separate wiring diagram included with this burner for specific wiring details. The wiring diagram number for your burner is listed on the front cover of this manual.
PAGE 9
VII Gas Piping Cont. ■ In higher gas pressure systems (over 14" W.C.) it is very important to install the proper pressure reducing regulators at the burner. A high pressure regulator must be used in the line ahead of the burner main manual gas valve, but it must be of the tight shut-off type and must have a minimum flow regulating capacity suitable for the pilot (20,000 BTU/hr.
PAGE 10
Part 2 Service CAUTION: Do not tamper with the unit or controls. If trouble occurs contact your serviceman. CAUTION: Be sure that the main and pilot manual valves are closed and the burner power supply is turned off before removing any parts for service. Do not push relay contacts in manually. IX Burner Box and Nozzle Assembly ■ Maintenance of the burner box and nozzle is minimal, due to the simplicity of the parts and the absence of small air or gas passages.
PAGE 11
XI Blower and Motor ■ No routine service is necessary on the blower system other than cleaning the blower wheel when necessary. ■ Blowers using three-phase motors will run in either direction depending on the connection of the power supply. On new installations, motor replacement or power supply disturbance, the rotation must be checked. Corrections can be made by interchanging any 2 wires of the threephase power supply.
PAGE 12
V5055 Valve Body with Motorized Actuator Cont. XIV Automatic Gas Valve Leak Test ■ Do not disassemble the valve actuator, it is not field repairable. If malfunction occurs, replace the entire actuator. 1. 2. 3. 4. 5. 6. 7. 8. Turn off power to burner. Fully close the manual test cock (located downstream of the gas input adjuster. Remove the 1/8" pipe plug from the test tap located: a. with diaphragm valve (in one of the pipes nipples between the valve and test cocks, or b.