Midco LNB1000 Parts List

Replacement Parts &

Price List

MADE in the USA

Low NOx Burners - 24V
Model LNB500 & LNB1000

with Combustion Chamber

Installation and Service Manual - 8471-91 / 8471-87

Date Code - 3811

First Manufactured October 23, 2011

The air and gas are premixed through a modulating premix gas blower. The air and gas

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]

is ignited using a simple direct spark ignition system not requiring an additional pilot

burner. Once the air and gas are premixed it is distributed through a high efficient metal

fiber burner head. Premixing the fuel and air before ignition assures complete combustion

with minimal levels of CO and NOx.

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.

914

Quality Designed for Proven Performance

8473 00

Printed in USA

Exploded View - Low NOx Burner - LNB500 & LNB1000

G

E

2

3

4

5

7

6

14A

13A

12

11A

1

9

8

A

B

C

F

H

I

J

K

10

D

20A

LNB1000

LNB 500

Gas
Flow

19A

LNB1000

23

22

Gas
Flow

14B

18A

17

13B

16

11B

21

LNB 500

15

19B

18B

20B

2

Midco International Inc.

8473 00

Low NOx - LNB500 & LNB1000 - Burner Parts List

Item Part # Description Qty Item Part # Description Qty

1 5246-03 LNB 500 / LNB 1000 - 1″ Insertion
Combustion Chamber 4″ Wall 1
2 5246-51 LNB 500 / LNB 1000 - Control Box 24V 1
3 8429-02 RTC Board DC Signal to PWM 1
4 8429-64 LNB 500 / LNB 1000 - Ignition Control - 24V 1
5 8447-27 LNB 500 / LNB 1000 - 120V to 24V
75VA Transformer 1
6 8408-94 10/32 Terminal Nut 1
7 8447-22 Ignitor Spark Generator 1
8 7122-90 Peep Sight Assembly 1
9 5246-27 Peep Sight Graphite Gasket 1
10 5246-42R Pilot Assembly Repair Kit (Complete) 1
A 5246-17 Flame Rod LNB Assembly 1
B 5246-48 Ignitor Flange Gasket 1
C 5246-22 Ignition & Flame Assembly Plate 1
D 8432-21 O-Ring 1/2″ X 11/16″ X 3/32″ 1
E 5246-45 Ignition Assembly Weldment Only 1
F 5246-43 Spark Rod Assembly LNB 1
G 8432-22 O-Ring 7/16″ X 5/8″ X 3/32″ 1
H 8432-20 O-Ring 5/32″ X 11/32″ X 3/32″ 1
I Hardware 1/4″ Star Lock Washer 2
J Hardware 1/4″ Split Lock Washer 2
K Hardware 1/4-20 Hex Nut 2
11A 8416-18 LNB 1000 - Blower Inlet Kit 1
11B 8416-22 LNB 500 - Blower Inlet Kit 1
12 5246-64 1″ x 3″ Nipple with Orifi ce 1
13A 8404-38 1″ Quick Actuated Ball Valve 1
13B 8404-37 3/4″ Quick Actuated Ball Valve 1
14A 8416-04 LNB 1000 - 1″ NPT Ratio Regulator 1
14B 8416-21 LNB 500 - 3/4″ NPT Ratio Regulator 1
15 8402-36 LNB 1000 - 1″ Solenoid Valve 24v 2
16 8416-33 LNB 1000 - RV61 1″ NPT Gas Regulator 1
17 8404-29 1″ NPT T-Handle Ball Valve 1
18A 5246-04R LNB 1000 Blower Assembly - G170 120V 1
18B 5246-82R LNB 500 Blower Assembly RG175/120 1
19A 8435-23 LNB 1000 - EBM Blower Only 1
19B 8435-30 LNB 500 - EBM Blower Only 1
20A 5246-29 LNB 1000 - Fiber Burner Head -
Weldment - 4″ X 19″ 1
20B 5246-79 LNB 500 - Fiber Burner Head -
Weldment - 4″ X 9″ 1
21 5246-85 3/4″ x 3″ Nipple with Orifi ce 1
22 5246-72 3/4″ x 3″ Nipple with Tab/Orifi ce 1
23 8419-43 LNB 500 -- Gas Valve Quick Opening 1

Not Shown
2117-95 EBM Power Wire Harness 1
2117-96 EBM Control Wire Harness 1
5246-26 LNB 1000 - EBM Blower Assembly Gasket 1
5246-32 LNB 500 / LNB 1000 - 4″ Fiber
Burner Head Gasket 1
5246-41 Flame Rod Wire 1
5246-49 Spark Rod Wire 1
5246-76 LNB 500 - EBM Blower Assembly Gasket 1
8413-00 Air Filter - LNB 500 1
8413-01 Air Filter - LNB 1000 1

Price list on page 4.

8473 00

Midco International Inc.

3