Grieve Corporation RE4400 Service Manual

Installation and Service Instructions

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

RE4850A / RE4400

Gas Burners

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:

u Do not try to light any appliance.
u Do not touch any electrical switch;do not use any

phone in your building.

u 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

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.

Midco®International Inc.

4140 West Victoria St. - Chicago, Illinois 606 46
tel [phone] fax [phone]
web www.midco-intl.com e-mail [e-mail]

Quality Designed for Proven Performance

The following terms are used to identify hazards, safety precaution of

303p

8471 20

Printed in USA

Part 1 Installation

Specifications

The ECONOMITE Models RE 4850A and RE4400 burners with intermittent and interrupted

1

spark ignited pilot are adaptable to most gas utilization equipment, including gravity and
forced circulation furnaces and boilers. They are particularly recommended for firing
horizontal or downdraft equipment since no draft is required to maintain a pilot. Power burner
design makes them perfectly suited for oil burner replacement, including rooftop and
industrial applications.

AIR DELIVERY (Approximate Air Delivery at Zero Draft)
FIRING RATE (NATURAL OR PROPANE )

GAS SUPPLY PRESSURE REQUIRED

TUBE DIAMETER........................................................ 4"

TUBE LENGTH............................................................ 9"

RECOMMENDED COMBUSTION CHAMBER SIZE (AT MAX. BTU/HR)

ELECTRICAL SUPPLY.............120 Volts...........60 Hertz

FLAME SAFETY....Electronic Flame Safety with Spark Ignited Pilot and 100% Shut-Off

RE 4850A and RE4400 .................. 125 SCFM

3

MAXIMUM MBH
MINIMUM MBH

NATURAL .............................................. 7.0" to 14.0" W.C.

PROPANE ............................................. 5.0" TO 14.0" W.C.

WIDTH 15" 10”
LENGTH 30" 16.5”

RE 4850A RE4400

850 400

4

4

280 132

RE 4850A RE4400

2

TABLE 1: Burner Specifications

1. Standard burners are shipped as NATURAL gas models. Contact your Midco dealer for

2. SCFM = Standard Cubic Feet / Minute.

3. All Ratings Based on 1000 BTU/Cu. Ft. NATURAL. Derate burner for altitude over 2,000

4. 1 MBH = 1,000 BTU/hr.

intended for outdoor installation and must be protected from excessive moisture.
Provide adequate clearance for service and proper operation.

PROPANE gas burners.

feet by 4% for each 1,000 feet above sea level.

CAUTION: The ECONOMITE Models RE4850A and RE4400 Burners are not

_____________________________________

Part 1

Installation

I Ventilation

II Preparation of

the Gas Utilization

Equipment

2

If the former automatic oil burner gave trouble-free operation, it is probable that the heating
plant area has sufficient infiltration of air for combustion and dilution of flue gases.

Nevertheless, the area must be checked.

o Open basement or utility areas of normal construction, without storm windows or tight
doors, will generally allow sufficient air infiltration. However, if the heating plant is located in
a tight or separate room, ventilation to an open area as described above will be required.
Install two permanently open grills, each sized on the basis of one square inch free area per
1,000 BTU (but not less than 100 square inches) of the total input rating of all gas utilization
equipment in the combined space. One grille should be located within 12 inches of the
ceiling, the other within 12 inches of the floor.
o If the heating plant is located in an area of unusually tight construction, or if an exhaust
fan, kitchen ventilation system, clothes dryer and/or fireplace is installed in the building,
provisions must be made for an outside air supply near the heating appliance area. Install
permanently open grills sized at not less than one square inch free area per 4,000 BTU of
burner input. When ventilating through horizontal ducts, grills should be sized at not less
than one square inch free area per 2,000 BTU of burner input. In any case, the minimum
dimension of rectangular air ducts shall not be less than 3 inches.
o In Canada, for detailed ventilation requirements, refer to standard CAN 1-B149.1 or .2
and/or local codes.

_____________________________________

o Clean the gas utilization equipment combustion chamber, heat exchanger interior, and flue
connections. Remove all adhering tars, scale, dirt and soot. Inspect for actual or potential
leaks.
o 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.
o The access or firing door should open easily to relieve pressure. If positive latches exist,
they should be modified to permit easy opening; a spring loaded door holder is
recommended.

_____________________________________

3

Part 1

Part 1 Installation

Installation

Continued

III Combustion

Chamber

o On all boilers, make certain the pressure relief safety valve is in good operating condition.
A combustion chamber liner is normally required to protect non-heat transfer surfaces and to
provide a radiant bed for rapid heat transfer to the primary surfaces of the heat exchanger.
In most cases the existing chamber liner can be used, if in good condition.
o In the case of wet base boilers, where the entire firing chamber is comprised of heat
exchange surfaces and no chamber liner was provided for oil firing, a liner is usually not
required for the ECONOMITE. However, a liner or target wall may be necessary if the firing
chamber is unusually short, in order to avoid excess flame contact on the heat exchanger
walls or flueways.

o If a built up chamber liner is required, use 2,300°F minimum insulating material.
o The burner tube, or the stainless steel sleeve that is included with the burner, must be

sealed air tight into the combustion chamber opening with refractory material. The sleeve is
preferred as it is designed to properly locate the end of the tube relative to the inside wall of
the combustion chamber, and to permit burner removal without breaking the seal.

CAUTION: In no case should the burner tube be allowed to extend into the
chamber proper; it must be set at least 1" short of the inside surface because high
combustion chamber temperatures will cause premature pilot, electrode, burner tube
and sleeve deterioration.

WARNING: BURNER MUST BE MOUNTED IN ORIENTATION SHOWN IN
FIGURES 1A AND 1B. ANY OTHER MOUNTINGS MAY CAUSE A DANGEROUS
CONDITION, AND WILL VOID BURNER WARRANTY AND AGENCY APPROVALS. NON­STANDARD ARRANGEMENTS MAY BE AVAILABLE FOR SOME MODELS. CONSULT
FACTORY FOR DETAILS IF REQUIRED.

o 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 assembly has not been
damaged or displaced. See Figures 6A and 6B.

IV Chimney, Vent

Connector and

Draft Control

Figure 1A: Dry Base Boiler with

Combustion Chamber Liner (Warm Air

Furnace Construction is Similar)

_____________________________________

WARNING: The chimney shall be inspected for unsafe conditions such as
deteriorated masonry and excessive soot or other blockage or potential blockage.
Installation must conform with local codes or in the absence of local codes with NFPA,
ANSI Z223.1 latest edition.

WARNING: The vent connector shall not be connected to a chimney already
venting solid fuel burning equipment, an incinerator or an open fireplace.

o The Vent Connector shall be made of non-combustible, corrosion resistant material
capable of withstanding the vent gas temperature produced by the gas utilization equipment
and of sufficient thickness to withstand physical damage.
o The Vent Connector shall be as short as possible. The entire length shall be readily
accessible for inspection, cleaning, and replacement.
o The length of horizontal uninsulated Vent Connector between the chimney and a single
gas utilization equipment shall not exceed 75% of the the height of the chimney above the
connector, or 100% if the Vent Connector is insulated.
o The Vent Connector shall be installed so as to avoid turns or other construction features
which create excessive resistance to flow of vent gas. It shall be installed without any dips or
sags and shall slope upward at least 1/4" per foot.
o A manually operated damper shall not be placed in the Vent Connector or chimney of
any gas utilization equipment.
o The Vent Connector shall be firmly attached to draft hood outlets and flue collars. Joints
between sections of connector piping shall be fastened by sheet-metal screws or other
approved means. The Vent Connector shall be supported for the design and weight of the
material employed to maintain clearance and prevent physical damage and separation of
joints.
o 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

Figure 1B: Wet Base Boiler with Unlined

Combustion Chamber

Part 1

Part 1 Installation

Installation

Continued

IV Chimney, Vent

Connector and

Draft Control

Continued

case shall the relief opening of the draft hood or barometric draft regulator be located at a
point lower than the top of the highest flue passage in the equipment.
o 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).
o A device which will automatically shut off gas to the burner in the event of sustained
backdraft is required. It shall be of the listed manual reset type and installed and adjusted by
a qualified service technician in accordance with the manufacturer’s instructions.
o Refer to gas utilization equipment manufacturer for recommended vent connection
requirements.

_____________________________________

Figure 2: Wiring Diagram

4

Figure 3: Recommended Locations for Draft Hoods

5

Part 1

Part 1 Installation

Installation

Continued

V Electrical

Installation wiring and grounding to the burner must conform to local codes, or, in their
absence in the United States to National Electric Code, ANSI/NFPA No. 70 latest edition;
in Canada, to Canadian Electrical Code Part 1, CSA Standard C22.1
o Use copper wire not less than 14 gage for line voltage wiring. Hook up to a dedicated line
with an on-off disconnect switch and a minimum 10 Amp breaker.
o 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.
o Confirm that the polarity is correct—hot wire to strip terminal L1, neutral L2—and that the
neutral line is not subject to induced low voltage (check L2 to earth ground) from other
equipment, as that can cause the primary safety control to malfunction.
o Each installation must include suitable limit control(s). Existing oil burner combination
operating and limit controls are normally NOT SUITABLE for gas burner use.
o Connect motors used on forced air furnace fans or boiler pumps to a combination limit
control and switch.

CAUTION: Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation. Verify proper operation
after servicing.

_____________________________________

VI Piping

Figure 4: Location for Barometric Draft Regulators

Note: Figure 3 and 4 : Copyright by American Gas Association.

Used by permission of the copyright holder.

CAUTION: The available gas pressure should be within the limits shown in
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.

o 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
and malleable fittings free of cutting and threading burrs or defects.
o Provide a sediment trap, union and 1/8" pressure tap in piping close to burner as shown
in Figure 5.

o Use pipe joint compound approved for use with Liquid Petroleum Gases.
o Piping must also comply with your local codes.
o To obtain the maximum firing rate of the burner, the gas supply piping must be sized to

provide a minimum of 7.0"W.C. pressure to the inlet of the upstream automatic safety shut­off valve when the burner and all other gas utilization equipment are on. The pilot regulator
can be mounted in any position, the main regulator, if equipped, should be mounted upright
and in a horizontal run of pipe.

CAUTION: Because it is difficult to accurately control pressure during supply
pipe leak testing, it is recommended that all low pressure (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.