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Installation and Service Instructions 

1007

8471 45

Printed in U.S.A.

In the United States,

Installation must

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 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 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.

Economite

RE6700B / RE6850 / RE6850B

Gas Burners

BURNER MODEL

BILL OF MAT'L
NUMBER

SERIAL NUMBER #

WIRING DIAGRAM

FOR SERVICE CONTACT:

Name

Address

Phone

Date of Installation

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.

S A F E T Y   I N F O R M A T I O N   T E R M S :

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

: Identifies the most serious hazards which 

will

result in severe personal injury or death.

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.

Midco International Inc

.

4140 West Victoria St.  -  Chicago, Illinois 60646
tel 773.604.8700    fax 773.604.4070    
web www.midcointernational.com        e-mail  sales@midcointernational.com

Q u a l i t y   D e s i g n e d   f o r   P r o v e n   P e r f o r m a n c e

Summary of Contents for economite RE6700B

Page 1: ...urners BURNER MODEL BILL OF MAT L NUMBER SERIAL NUMBER WIRING DIAGRAM FOR SERVICE CONTACT Name Address Phone Date of Installation 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 you...

Page 2: ...r detailed ventilation requirements refer to standard CAN 1 B149 1 or 2 and or local codes ____________________________________________ Part 1 Installation 2 I Ventilation The ECONOMITE Models RE6700B RE6850 and RE6850B burners with intermittent spark ignited pilot are adaptable to most gas utilization equipment including gravity and forced circulation furnaces boilers and hot water heaters They a...

Page 3: ...D IN ORIENTATION SHOWN IN FIGURES 1 AND 2 ANY OTHER MOUNTINGS MAY CAUSE A DANGEROUS CONDITION AND WILL VOID BURNER WARRANTY AND AGENCY APPROVALS NON STANDARD ARRANGEMENTS MAY BE AVAILABLE FOR SOME MODELS CONSULT FACTORY FOR DETAILS IF REQUIRED Before permanently setting the burner in place check that the main burner and pilot ports are free of foreign materials and also that the spark electrode as...

Page 4: ...ysical damage and separation of joints A draft hood or a barometric draft regulator shall be installed in the same room or enclosure as the equipment in such a manner as to prevent any difference in the pressure between the hood or regulator and the combustion air supply see Figures 3 and 4 In no case shall the relief opening of the draft hood or barometric draft regulator be located at a point lo...

Page 5: ... disconnect switch and a minimum 10 Amp breaker The frame of the burner should be well grounded Normally the piping and or electric conduit will provide sufficient grounding However a ground lug is located in control box for positive grounding where insulated pipe couplings are used or where any doubt exists regarding grounding sufficiency Confirm that the polarity is correct hot wire to strip ter...

Page 6: ...lation VI Piping Capacities shown are for a total pressure drop of 0 3 W C For 0 5 W C pressure drop multiply capacity shown by 1 3 Propane capacities shown are for a total pressure drop of 0 5 W C For higher permissible pressure drops consult your gas supplier Table 2 Schedule 40 NPT Pipe Capacity Chart 10 200 590 400 1075 900 40 275 200 500 450 1040 650 75 190 150 360 325 750 475 20 150 400 275 ...

Page 7: ...ure 14 0 W C max components both main and pilot be disconnected during testing Exposing low pressure regulators and valves including manual valves to pressures over 1 2 PSIG 14 0 W C will cause damage and void all warranties DANGER Explosion hazard Do not use oxygen for pressure testing An explosion could occur during initial start up If the burner piping must be rearranged because of space limita...

Page 8: ...art 1 Installation Continued Part 1 Installation Figure 5 Cont Piping Diagram for RE6850 120 V and RE6850 B 24V RE6850B UL Valve Train Assembly 24VAC RE6850 UL Valve Train Assembly 120VAC Piping Continued ...

Page 9: ...Purging the air from the gas supply line at this step will expedite first light off IMPORTANT Purge outside the building Do not purge into the gas utilization equipment 3 To purge the gas utilization equipment and chimney of any accumulated gases turn main Manual Gas Cock OFF close Pilot Manual Shut Off Valve turn burner power on and set operating control to ON or thermostat to call for heat Let t...

Page 10: ...If you need an orifice that is not included with the burner drill out the provided 0 358 orifice stamped J to the required hole size as per chart above 3 Natural gas to LP gas conversion kits are available consult factory Orifice size and approximate manifold gas pressure setting as shipped Air shutter is set on mark 4 DATA FOR TABLES IS APPROXIMATE AND BASED ON 0 OVERFIRE PRESSURE AT SEA LEVEL 2 ...

Page 11: ...mbustion testing instrument The carbon monoxide content should conform to local codes or in their absence to the level specified in the United States or Canadian Standard referenced on the front cover of this manual and the carbon dioxide content should be approximately 9 5 for NATURAL or 12 for propane or within the limits prescribed by local codes 12 Check the draft control to make sure there is...

Page 12: ...justing screw Turning the screw clockwise will increase outlet pressure counter clockwise will decrease outlet pressure The spark rod for a natural gas burner is welded to a round 1 2 perforated retention plate The spark rod for a propane gas burner is welded to a round 1 2 solid retention plate The 1 2 retention plate is centered in the 3 8 Tee pilot and is positioned so the high tension voltage ...

Page 13: ...elay to allow system prepurge After a 30 second prepurge the 15 second trial for pilot ignition sequence begins Trial for Pilot Ignition On a call for heat and after 30 second prepurge the module energizes the spark source and the pilot valve relay simultaneously The pilot valve opens allowing gas to flow to the pilot burner during the 15 second ignition trial time The spark lights the pilot flame...

Page 14: ...p or Modulating burners Once the STANDBY sequence has a CALL FOR HEAT input normal start up prepurge will be initiated A The blower motor is powered to start the prepurge sequence B The airflow interlock switch must close in ten seconds of prepurge or within the specified purge card timing Otherwise a recycle to the beginning of prepurge or lockout will occur depending on how the airflow switch se...

Page 15: ..._______ LIGHTING INSTRUCTIONS 1 SET OPERATING CONTROL TO OFF OR THERMOSTAT BELOW ROOM TEMPERATURE 2 TURN MANUAL GAS COCK ON 3 TURN BURNER POWER ON 4 SET OPERATING CONTROL TO ON OR THERMOSTAT TO CALL FOR HEAT 5 IF THE PILOT FLAME IS NOT PROVEN WITHIN 15 SECONDS AFTER THE PRE PURGE THE CONTROLLER WILL SHUT OFF THE AUTOMATIC SAFETY SHUT OFF VALVES AND LOCK OUT IF THE PROOF OF FLAME IS LOST DURING BUR...

Page 16: ...he pre purge the Ignition Control Module will lock out RESET the 24 volt ignition Control Module by setting the operating control to OFF or the thermostat below room temperature for at least 30 seconds RESET the 120 volt RM7895 control by pushing its reset button See Section XII C Clogged pilot orifice D Pilot regulator mis adjusted or defective E Defective spark electrode Ignition Control Module ...

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