Midco Unipower V4, Unipower V1, Unipower V2, Unipower V3, Unipower V5 Oem Installation & Start Up Instructions

OEM Installation & Start Up Instructions

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• 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, 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.

Unipower VA Series

Variable Air Gas Burners

OEM Start Up

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: ____________________________________________

• USER: Retain this manual for future reference. If other

Date of Installation: ___________________________________

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.

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.

Midco® International Inc.
4140 West Victoria Street
Chicago, Illinois 60646
toll free 866.705.0514
tel [phone]
fax [phone]
web www.midcointernational.com
e-mail [e-mail]

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

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.

Quality Designed for Proven Performance

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LISTED

IHEA

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US

®

Member

8478 00

Printed in USA

619

Installation - Speci cations

Specifi cations 1

The VA Series, Models V1 to V 6 burners with intermittent spark ignited pilots and V7 to V10 with interrupted pilots are adaptable
to most gas utilization equipment, including gravity and forced circulation furnaces, heat exchangers and process ovens. They are
particularly recommended for fi ring high effi ciency and high turndown applications.

Burner Model V1 V2 V3 V4 V5 V6 V7 V8 V9 V10
Maximum Input
at 10″

(MBH/hr)

Maximum Input
at 7″

(MBH/hr)

Minimum
Input

(MBH/hr)

Turndown 19-1 26-1 25-1 25-1 25-1 25-1 24-1 24-1 25-1 25-1
Inlet Gas
pressure for
maximum
fi ring rate
Manifold gas
pressure for
maximum
fi ring rate

Approximate
Air Delivery at
Zero Draft

2,3

670 1,260 2,000 2,000 2,500 2,500 3,000 3,000 3,800 3,800

2,3

550 1,150 1,890 1,890 2,500 2,500 3,000 3,000 3,300 3,330

2,3

36 48 80 80 100 100 120 120 150 150

4

(NG) 10.0″ 10.0″ 10.0″ 10.0″ 10.0″ 10.0″ 10.0″ 10.0″ 10.0″ 10.0″

(NG) 5.0″ 3.4″ 3.9″ 3.9″ 4.3″ 4.3″ 4.4″ 4.4″ 4.9″ 4.9″

(CFM) 115 210 360 360 440 440 620 620 720 720

Minimum Recommended Chamber Size
Width 18 24 34 28 42 30 48 36 54 36
Height 18 24 26 28 26 36 28 42 28 42
Depth 42 48 54 54 60 60 66 66 72 72

1

Standard burners are shipped as NATURAL gas models. Contact Midco for PROPANE gas burners.

2

1 MBH = 1,000 Btu/hr

3

All Ratings Based on 1000 BTU/Cu. Ft. NATURAL, 2500 BTU/Cu. Ft. PROPANE at sea level. Derate burner for altitude over 2,000 feet by 4%

for each 1,000 feet above sea level.

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Lower gas inlet pressure may be used when maximum input is not required. Burner input based on 0.5″ W.C. back pressure.

Table 1. Burner Specifi cations

Burner Control Motor TOTAL Motor

Model amps amps amps HP

V1 1.3 3.5 4.8 .32

V2 1.6 4.0 6.8 .50

V3 1.5 10.5 12 1.10

V4 1.5 10.5 12 1.10

V5 2 10.5 12.5 1.10

V6 2 10.5 12.5 1.10

V7 2.1 13 15.1 1.75

V8 2.1 13 15.1 1.75

V9 2.1 13 15.1 1.75

V10 2.1 13 15.1 1.75

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Midco International Inc.

8478 00

Installation - Startup Adjustment

- Before opening the main supply gas valve, see Figure 3 - item # 9, verify that the inlet
pressure is below the maximum inlet pressure specifi ed on the Burner Rating Label,
see Figure 1.

- Exposing components to pressure above the maximum inlet pressure can cause damage.

®

UNIPOWER VA Gas Burner

MODEL:

SERIAL NO.:
BILL OF MATERIAL:

MAXIMUM INLET PRESSURE: W.C.

Î

MINIMUM FIRING RATE: BTU/HR

NAT

®

CHICAGO, IL 60646

Figure 1. Burner Rating Label - Maximum Inlet Pressure

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No. Pl-100, 058

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FIRING RATE: BTU/HR
PRESSURE REQUIRED: W.C.
MANIFOLD PRESSURE: W.C.

MAX. CAPACITY: BTU/HR
PRESSURE REQUIRED: W.C.
MANIFOLD PRESSURE W.C.

VOLTS

CONTROLS

MOTOR

AMPS HZ PH HP

7”

10”

2121-07

I
Confi rm Inlet Pressure

- Confi rm that the air damper, see Figure 2, is completely open and has not been
inadvertently moved during packing, shipping, or installation.

- To open, loosen the nut that secures the damper and pull it outward. Then retighten
the nut.

Slide

Loosen the Nut

Outward
to Open

Figure 2. Air Damper

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II
Check Air Damper

8478 00

Midco International Inc.

3

Installation

Install Shut-Off Type

Pressure Fittings

III

- Install the necessary fi ttings so that pressure can be measured at fi ve points
listed below ...

Refer to Figure 3:
a. Manifold pressure - item # 2
b. Load line pressure - item # 4
c. Main gas regulator outlet pressure - item # 7
d. Inlet pressure - item # 10
e. Pilot pressure - item # 12

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2

13

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4

5

6

7

8

Item # Description

1. Back Plate

2. Main Gas Manifold Pressure Tap

3. Manual Firing Valve

4. Load Line Pressure Tap

5. Low Fire Bypass

6. Ratio Regulator

7. Main Gas Regulator Outlet Pressure Tap

8. Main Gas Regulator

9. Main Supply Gas Valve

10. Inlet Gas Pressure Tap

11. Pilot Gas Regulator

12. Pilot Gas Manifold Pressure Tap

13. Pilot Solenoid Valve

12

11

10

9

Figure 3. Component and Pressure Tap Locations

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Midco International Inc.

8478 00