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9 65-0120—1

RM7838B

SPECIFICATIONS

(102)

4 (102)

3/8 INCH NPT

1 INCH NPT

7/8 (22) OPENING

FOR 1/2-INCH CONDUIT

ALLOW 9 INCHES (228 MILLIMETERS)

CLEARANCE TO SWING OUT THE DETECTOR

FOR LENS CLEANING OR SERVICING.

M5083A

1-1/16 (27)

2-1/4

(57)

2-1/4

(57)

4-27/32 (123)

1-13/32 (188)

10-9/32 (261)

2-5/16

(58)

29/32 (23)

3/4 (19)

1-19/32

(41)

2-11/16

(68)

7-5/8 (194)

Fig. 5—Ultraviolet detectors

(Continued)

C7076A

Fig. 6—Infrared detectors.

APERTURE

BUSHING WITH

MAGNIFYING LENS

COLLAR, 3/4-14 NPSM

INTERNAL THREADS

3/4-14

NPSM

3/4-14 NPSM

INTERNAL

THREADS

HEAT BLOCKCELL MOUNT

M1982A

2 LEADS IN A

48 INCH [1.2 METER]

FLEXIBLE CONDUIT

2-3/4

(70)

1-1/4

(32)

1-5/8 (41)

1-1/16 (27)

1-1/4

(32)

C7015

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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