Midco Unipower G56B Installation And Service Instructions Manual

Gas power burners

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Installation and Service Instructions
MADE
in the
USA
• 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.
WARNING: Additions, changes, conversions
and service must be performed by an authorized Midco
representative, service agency or the fuel supplier. Use
only MIDCO specifi ed 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 fl ammable liquids
and vapors in the vicinity of this gas utilization equipment
and remove such hazards. Affi x this manual and associated
literature to the 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 qualifi ed service
agency. DO NOT ATTEMPT REPAIRS. An inadvertent service
error could result in a dangerous condition.
AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO
Part Number and Description. Furnish Burner Model Number, Bill of Material
Number and Serial Number (if available) from the specifi cation plate found on the
product.
IMPORTANT: Availability of parts as well as specifi cations are subject to change
without notice. Please consult factory for item availability.
®
Midco
International Inc.
4140 West Victoria Street
Chicago, Illinois 60646
toll free 866.705.0514
tel
773.604.8700
fax
773.604.4070
web
www.midcointernational.com
e-mail sales@midcointernational.com
SAFETY INFORMATION TERMS: The following terms are used to identify hazards, safety precaution of special notations
and have standard meanings throughout this manual. They are printed in all capital letters using a bold type face as shown
below, and preceded by the exclamation mark symbol. When you see the safety alert symbol and one of the safety information
terms as shown below, be aware of the hazard potential.
DANGER:
Identifi es the most serious hazards which will result in severe personal injury or death.
WARNING:
Signifi es a hazard that could result in personal injury or death.
CAUTION:
Identifi es unsafe practices which would result in minor personal injury or product and property
damage.
Quality Designed for Proven Performance
Unipower
G56B G57B
G58B G69B
Gas Power Burners
U L
®
WARNING: If the information in these instructions
is not followed exactly, a fi re or explosion may result,
causing property damage, personal injury or death.
Do not store or use gasoline or other fl ammable 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 your building.
Immediately phone your gas supplier from another
building. Follow the gas supplier's instructions. If
you cannot reach your gas supplier call the fi re
department.
Installation and service must be performed by a qualifi ed
installer, service agency or the gas supplier.
BURNER MODEL:
___________________________________
BILL OF MATERIAL
NUMBER:
___________________________________
SERIAL NUMBER #: ___________________________________
WIRING DIAGRAM: ___________________________________
FOR SERVICE CONTACT
Name:
____________________________________________
Address: ____________________________________________
____________________________________________
Phone:
____________________________________________
Date of Installation: ___________________________________
414 ISO
8470 86
Printed in USA

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Summary of Contents for Midco Unipower G56B

  • Page 1 DO NOT ATTEMPT REPAIRS. An inadvertent service error could result in a dangerous condition. Address: ____________________________________________ AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and Description. Furnish Burner Model Number, Bill of Material ____________________________________________ Number and Serial Number (if available) from the specifi cation plate found on the product.
  • Page 2 Even if burner operation is successful this condition must be corrected to prevent the hazard of drawing fl ue gases into the building. Consult your local gas company when doubt exists concerning boiler room ventilation. _______________________________________ 8470 86 Midco Inc. International...
  • Page 3: Installation

    Construction For 225,000 BTU Per Square Foot. (Standard) Figure 2 - Typical Floor And Wall Construction For 275,000 BTU Per Square Foot. Figure 3 - Typical Floor And Wall Construction For 350,000 BTU Per Square Foot. (Maximum) 8470 86 Midco International Inc.
  • Page 4 FILLER SECTION WITH + 2" MAX. SURFACE REFRACTORY OR HIGH ATION TEMP, MINERAL WOOL AIR PASSAGE INSULATION LARGE DIAMETER BURNER ENTRY SMALL DIAMETER SCOTCH MARINE BOILER BURNER ENTRY WARM AIR FURNACES Figure 7 - Tubular Combustion Chambers 8470 86 Midco Inc. International...
  • Page 5 Since fi ring door installations will generally leave no openings for fl ame observation, a peep sight must be installed in the burner mounting plate. _______________________________________ 8470 86 Midco International Inc.
  • Page 6 Figure 10. Use of a draft hood is usually limited to burners with lower range capacities, while a barometric draft control is suitable for all capacities. Application should depend on the requirements of the installation. 8470 86 Midco Inc. International...
  • Page 7 ABBREVIATIONS REDUNDANT BL BLUE PILOT VALVE BK BLACK LEGEND: BROWN R (BK) ORANGE WIRING AND R (BK) COMPONENTS BY MIDCO WHITE PILOT GAS VALVE WIRING AND PURPLE COMPONENTS BY INSTALLER 24V GND YELLOW OPTIONAL WIRING AND GREEN COMPONENTS BY MIDCO...
  • Page 8 See Tables 1 and 2 Capacities shown are for total pressure drop of .3″ W.C. For higher permissible pressure drops consult your fuel supplier. Source: Gas Engineers Handbook - 1974 Table 3 Schedule 40 Pipe Capacity Chart 8470 86 Midco Inc. International...
  • Page 9: Initial Start-Up

    fl ame safeguard reset button is set. 4. Make the proper settings on all limit controls and set controller to call for heat. 5. Set blower air shutter wide open. 8470 86 Midco International Inc.
  • Page 10 550°. Excessive fl ue temperatures result in low effi ciencies. Low fl ue gas temperatures may cause excessive condensation. Reset input if necessary to adjust stack temperature; or if temperature is too low, portions of the heat exchanger surface can be blocked off with insulating fi rebrick. 8470 86 Midco Inc. International...
  • Page 11 In the absence of any local codes, guidelines or requirements, refer to the latest edition of the National Fuel Gas Code, ANSI Z223.1-1992. Table 4: Approximate “G” Series Capacities At Specifi ed Manifold Pressures. 8470 86 Midco International Inc.
  • Page 12: Installation And Service

    Do not increase orifi ce sizes indiscriminately. Pilot troubles may be introduced by causing the pilot to fl oat and lose contact with the fl amerod or fl ame grounding area. Adjust the pilot per paragraph 7 of Section VIII-Initial Start-Up. 8470 86 Midco Inc. International...
  • Page 13 NOTE: All burners are equipped with dual valves. Select the type you have and reference. Burner XII Main Automatic Valves construction for special codes and/or insurance requirements such as Factory Mutual or Industrial Risk Insurers may require alternate construction. (Refer to Section XIV SPECIAL EQUIPMENT). 8470 86 Midco International Inc.
  • Page 14: Main Burner Operation

    The control remains in lockout until power is cycled by the system thermostat or removing and restoring system power. For operation characteristics, maintenance, service procedures, and LED codes refer to manufacturer’s literature provided. _______________________________________ 8470 86 Midco Inc. International...
  • Page 15 Any time the burner gas supply is shut off with the main manual valve, the low pressure switch will require resetting. If any doubt exists concerning burner operation when special equipment is involved, contact the installing contractor or MIDCO INTERNATIONAL INC. (front cover). _______________________________________ 8470 86...
  • Page 16: Trouble Chart

    D. Defective main regulator. E. No power at main valve(s). F. Blocked main valve bleed line (If equipped). G. Defective main valve(s). H. Closed test cock. I. Input adjuster closed. J. Defective fl ame safeguard. 8470 86 Midco Inc. International...
  • Page 17 Needs Frequent Resetting B. See 5 above. C. See 6 above. NOTE: Some of the probable causes listed above apply only to certain models as indicated, therefore some may not apply to your particular case. _______________________________________ 8470 86 Midco International Inc.
  • Page 18 Midco ® International Inc. - 4140 West Victoria Street - Chicago, Illinois 60646 - toll free: 866 705 0514 9001 tel: 773.604.8700 - fax: 866.580.8700 - web: www.midcointernational.com - e-mail: sales@midcointernational.com 8470 86 Printed in USA...

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