Midco economite RE6700B Installation And Service Instructions Manual

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Installation and Service Instructions
In the United States,
conform with local codes or, in the absence of local
codes, with Installation of the National Fuel Gas
Code, ANSI Z223.1-latest edition, from the 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 1B-149.
Further
reference
should
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 adjacent 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 qualified service agency. DO
NOT ATTEMPT REPAIRS. An inadvertent service
error could result in a dangerous condition.
S A F E T Y I N F O R M A T I O N T E R M S :
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
: Identifies the most serious hazards which
WARNING
: Signifies a hazard that
CAUTION
: Identifies unsafe practices which would result in minor personal injury or product and property damage.
Midco International Inc.
4140 West Victoria St. - Chicago, Illinois 60646
tel 773.604.8700
fax 773.604.4070
web www.midcointernational.com
Economite
RE6700B / RE6850 / RE6850B
Gas Burners
Installation must
be
made
to
the
The following terms are used to identify hazards, safety precaution of special
will
could
result in personal injury or death.
Q u a lity D esign ed for Pr ov en P er fo rm anc e
e-mail sales@midcointernational.com
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 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 fire
department.
Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
BURNER MODEL
BILL OF MAT'L
NUMBER
SERIAL NUMBER #
WIRING DIAGRAM
FOR SERVICE CONTACT:
Name
Address
Phone
Date of Installation
result in severe personal injury or death.
1007
8471 45
Printed in U.S.A.

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  • Page 1 Installation and service must be performed by a qualified installer, service agency or the gas 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 BURNER MODEL parts.
  • Page 2: Part 1 Installation

    FLAME SAFETY..Electronic Flame Safety with Spark Ignited Pilot and 100% Shut-Off ..120 VAC, RE6850 TABLE 1: Burner Specifications 1. Standard burners are shipped as NATURAL gas models. Contact your Midco dealer for PROPANE gas burners. 2. SCFM = Standard Cubic Feet / Minute.
  • Page 3: Combustion Chamber

    Part 1 Installation Clean the gas utilization equipment combustion chamber, heat exchanger interior, and flue Part 1 connections. Remove all adhering tars, scale, dirt and soot. Inspect for actual or potential Installation leaks. Continued Cement all joints, including those in the heating appliance base and around the door frames, to prevent leakage into, or out of the combustion chamber.
  • Page 4 Part 1 Installation Part 1 Installation Continued Chimney, Vent Connector and Draft Control Continued Note: Figures 3 and 4 : Copyright by American Gas Association. Used by permission of the copyright holder. Figure 3: Recommended Locations for Draft Hoods The Vent Connector shall be installed so as to avoid turns or other construction features which create excessive resistance to flow of vent gas.
  • Page 5 Part 1 Installation Part 1 Gas utilization equipment requiring controlled draft may be equipped with a listed double acting barometric draft regulator, if approved by local codes (see Figure 4). Installation A device which will automatically shut off gas to the burner in the event of sustained Continued backdraft is required.
  • Page 6 Part 1 Installation Part 1 Installation Continued Electrical Continued Wiring Diagram for RE6850 - 120V ____________________________________________ CAUTION: The available gas pressure should be within the limits shown in Piping SPECIFICATIONS section. Excessive pressure may damage electric valves, regulators and manual valves. If the supply pressure exceeds the 14.0"W.C. maximum, a suitable high pressure regulator must be installed between the Main Manual Shut-Off Valve and burner shut-off valve as shown in Figure 5.
  • Page 7 Part 1 Installation Part 1 The burner gas supply piping should branch off from the main line as close to the gas meter as possible. Do not connect to the bottom of a horizontal section. Use new black pipe Installation and malleable fittings free of cutting and threading burrs or defects.
  • Page 8 Part 1 Installation Part 1 Installation Continued RE6850 UL, Valve Train Assembly Piping 120VAC Continued RE6850B UL, Valve Train Assembly 24VAC Figure 5 (Cont.): Piping Diagram for RE6850 - 120 V and RE6850 B - 24V...
  • Page 9: Input Selection

    Part 1 Installation Part 1 CAUTION: High gas pressure supply lines require the proper pressure reducing regulators. Install a high pressure regulator of the Tight Shut-Off type Installation upstream of the low pressure regulator. Sized for main gas input, and suitable for Continued the minimum flow regulating capacity of the pilot.
  • Page 10 Part 1 Installation Part 1 Natural Gas / Propane Gas Orifice Size and Pressure Settings Installation RE6850 & RE6850B Natural Gas Propane Gas Continued Input Orifice Manifold Orifice Manifold Pressure Pressure MBTU/HR Size Letter Size Letter VIII Initial Start- ("W.C) ("W.C) (Inches) Stamp...
  • Page 11 Part 2 Service Part 1 Check the operation of the burner; start and stop it several times with the thermostat or operating control. Installation 10. With the burner running, check the operation of all limit and associated controls. Continued 11. Perform the following final adjustments for combustion and flue gas temperature. Take the flue gas samples and temperature immediately upstream of the draft control.
  • Page 12 Part 2 Service DANGER: Do not Part 2 Orifice tamper with the unit or Service Diameter controls. If trouble occurs Approx. Pilot Gas Pressure Continued contact installing Capacity Natural Propane contractor, service agency, Wire Drill BTU/Hr. Model or fuel supplier. See front 3.0"...
  • Page 13: Valve Train

    Part 2 Service Part 2 Cleaning of the blower wheel is usually the only service required. Need for cleaning is indicated if the character of the flame indicates a deficiency of air. Motor cooling air vents (if Service present) should also be cleaned at this time. Continued The motor and wheel are removed as an assembly.
  • Page 14 Part 2 Service XIII S8670J Ignition For operation characteristics, maintenance, and service procedures, refer to Control Module manufacturer's literature provided with burner. ____________________________________________ Primary The standard RE6850 burner is equipped with a Honeywell RM7895 microprocessor based burner control, employing a flame rectification system of flame detection. Burner Safety Control construction for special codes and/or insurance requirements such as Factory Mutual RM7895...
  • Page 15: Part 3 Maintenance

    Part 3 Maintenance Part 3 PART 3 MAINTENANCE Maintenance CONSUMER INSTRUCTIONS Consumer Instructions Keep the area around the burner clear and free of combustible material, gasoline or other flammable liquids or vapors. Do not obstruct burner air openings or ventilation grills for combustion air.
  • Page 16 G. Defective main gas valve. H. Low gas pressure. Grossly mis-adjusted main gas and air mixture. Insufficient pilot flame sensing signal. 1007 Midco International Inc. 4140 West Victoria Street * Chicago, Illinois 60646 8471 45 tel 773.604.8700 fax 773.604.4070 web www.midcointernational.com email sales@midcointernational.com...

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