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7 65-0120—1

Fig. 3—Mounting dimensions of the Keyboard

Display Module in in. (mm)

RM7838B

SPECIFICATIONS

MOUNTING FLANGE

1/2–14 NPSM

LEADWIRES

FACEPLATE

3/4–14 NPT

M1962A

3-3/4

(95)

7-7/32

(183)

5-1/8 (130)

3-7/16

(87)

5-1/4 (133)

C7012A,C,E,F

(51)

C7013A

1-1/4 (32)

1-5/16 (33)

5/16

(8)

C7014A

M1847

13/16 (21)

1-1/4 (32)

1-3/8 (35)

1-3/4

(45)

Fig. 4—Rectification Detectors.

M5002B

SCROLL MODE

SAVE

BURNER CONTROL

,



,







4-27/32 (123)

2-3/4

(69)

5/32

(4)

29/32

(23)

5/16

(8)

4-3/32 (104)

19/32

(15)

1-1/4

(32)

1-1/32

(26)

1-15/16

(49)

2-7/16 (62)

29/32

(23)

5/32 (4)

1/2

(13)

2-1/32

(52)

15/

(12)

13/

(11)

3-7/8 (99)

7/16 (11)

5/15

(8)

THREADED

MOUNTING

HOLES (2)–

10-32 UNF

1 (25)

FLAME ROD

TARGET

CERAMIC

INSULATORS

IGNITION

ELECTRODE

(Q179C ONLY)

BRACKET

M1983

3-1/8

(79)

1-21/32

(42)

1-13/32

(36)

3/8 (10)

1/2 (13)

1-1/16

(27)

25/32

(20)

25/32

(20)

2-25/32

(62)

3/32 (2)

11/16

(18)

17/32

(14)

Q179

Fig. 4—Rectification Detectors

(Continued).

Table of Contents2
Specifications3
- Table 1-Terminal Ratings3
- Table 2-Flame Detection Systems4
- Fig. 1-Mounting Dimensions of the RM7838B Relay Module and Q7800A Subbase, in In. (MM)6
- Fig. 2-Mounting Dimensions of the RM7838B Relay Module and Q7800B Subbase, in In. (MM)6
- Fig. 3-Mounting Dimensions of the Keyboard Display Module in In. (MM)7
- Fig. 4-Rectification Detectors7
- Fig. 5-Ultraviolet Detectors8
- Fig. 6-Infrared Detectors9
Principal Technical Features10
Safety Provisions10
Installation12
Fig. 7-Internal Block Diagram of the RM7838B13
Checkout15
- Communication Interface Controlbus Module15
Fig. 8-RM7838B Wiring with S445 Start-Stop16
Fig. 9-RM7838B Wiring with Separate Start-Stop17
Fig. 10-RM7838B Wiring with Separate Start and Stop Stations with 4 to 20 Ma Firing Rate Control Circuit18
Fig. 11-Wiring the Keyboard Display Module with19
Fig. 12-Wiring for Multiple Keyboard Display19
Fig. 13-Electrical Panel Installation20
Fig. 14-Wall or Burner Installation20
Fig. 15-ST7800 Purge Card Installation20
Fig. 16-Keyboard Display Module Mounting21
Fig. 17-DATA CONTROLBUS MODULE21
- Mounting21
- Display Module22
Fig. 19-Flame Signal Amplifier Mounting22
Fig. 20-Flame Detector Wiring23
Operation25
Fig. 21-Operation of the RM7838B Relay25
Fig. 22-Operation of the RM7838B Relay26
- Module27
Fig. 23-Keyboard Display Module and Sequence27
Table 3-Sequence Status Display Information28
Fig. 24-( ◊ ) SCROLL Pushbutton Function29
Table 4-Selectable Messages30
Table 11-Selectable Messages30
Fig. 26-MODE Pushbutton Function30
Fig. 27-SAVE Function30
Table 5-Expanded Annunciator32
Static Checkout33
Table 6-Site Configurable Jumper Options33
Fig. 28-Selectable Site-Configurable Jumpers33
Table 7-Static Checkout34
Table 8-Flame Signal36
Fig. 29-Flame Signal Measurement36
Fig. 30-Flame-Out Timer Lockout39
Table 9-Sequence and Status Hold Messages42
Table 10-Accessing Historical and Diagnostic Selectable Messages45
Troubleshooting49
Table 12-Hold and Fault Message Summary49
Fig. 31-Lockout Message State49
Fig. 32-Lockout Message State49
Fig. 33-Lockout Message State 349
- Table 13-Expanded Annunciator Hold Codes52
- Table 14-Expanded Annunciator Fault Codes52
- Current Status Messages53
- Table 15-Expanded Annunciator Diagnostic53
Fig. 34-Flush Mounting of Keyboard Display Module Template54

Model	7800 SERIES
Category	Control Unit
Frequency	50/60 Hz
Approvals	UL, CE
Communication	Communication Interface (Optional)

Honeywell 7800 SERIES User Manual

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