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Honeywell EC7895A, RM7895A 7800 SERIES EC7895A, RM7895A RELAY MODULE

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7800 SERIES EC7895A, RM7895A RELAY MODULE

65-0205

5

Sequence Timing For Normal Operation:

Flame Establishing Period

Device Initiate Standby Purge Pilot Main

EC7895A/RM7895A 10 sec. * ** 4 or 10 sec. No

*STANDBY and RUN can be an infinite time period.

** PURGE is determined by the ST7800A Purge Card selected.

Approval Bodies:

RM7895A:

Underwriters Laboratories Inc. listed: File no. MP268,

Guide no. MCCZ.

Factory Mutual approved.

EC7895A:

Factory Mutual approved.

Mounting:

Q7800A for panel mount or Q7800B for wall or burner mount.

Required Components:

Plug-in Flame Signal Amplifier, see Table 2.

Plug-in Purge Timer Cards: Selectable ST7800A, two

seconds to 30 minutes.

Q7800A or Q7800B.

Fig. 1. Mounting dimensions of EC7895/RM7895 Relay Module and Q7800A Subbase in in. (mm).

POWER

PILOT

FLAME

MAIN

ALARM

RESET

5

(127)

5 (127)

M11135

(133)

BURNER

CONTROL

REMOVE ONLY FOR TERMINAL TEST ACCESS.

1

1

5-1/4

Accessories:

Optional:

Network Interface Unit,

Part No. Q7700A1014, 120V 50/60 Hz

Part No. Q7700B1004, 100V to 200V 50/60 Hz

Network Interface ControlBus Module,

Part No. QS7800A1001.

COMBUSTION SYSTEM MANAGER™,

Part No. ZM7850A1001.

ControlBus 5-Wire Electrical Connector,

Part No. 203541.

DATA CONTROLBUS MODULE™,

Part No. S7810A1009.

Dust Cover, Part No. 221729A.

Flame Simulators:

UV Flame Simulator, Part No. 203659.

Rectification Simulator, Part No. 123514A.

Keyboard Display Module, Part No. S7800A1001,

English.

Keyboard Display Module, Part No. S7800A1118,

Japanese.

Remote Display Mounting Bracket, Part No. 203765.

Remote Display Power Supply, Part No. 203968A Plug-in.

Remote Reset Module, Part No. 57820A1007.

Sixty-inch Extension Cable Assembly, Part No. 221818A.

Contents

Main PRODUCT DATA 7800 SERIES EC7895A, RM7895A Relay Module 65-0205 GENERAL FEATURES Contents ORDERING INFORMATION SPECIFICATIONS Page only 7800 SERIES EC7895A, RM7895A RELAY MODULE Fig. 2. Mounting dimensions of EC7895/RM7895 Relay Module and Q7800B Subbase in in. (mm). 65-0205 6 BURNER CONTROL Q179 C7012A,C,E,F C7013A C7014A 7800 SERIES EC7895A, RM7895A RELAY MODULE Fig. 4. Ultraviolet detectors in in. (mm). C7027 C7035 C7076A C7044 PRINCIPAL TECHNICAL FEATURES Safety Shutdown (Lockout) Occurs If: SAFETY PROVISIONS Internal Hardware Status Monitoring Closed Loop Logic Test WARNING When Installing this Product Humidity Vibration Weather Mounting Wiring Subbase WIRING Page Fig. 8. Wiring the EC7895. ASSEMBLY Mounting RM7895 Relay Module Mounting Install the EC7895 or RM7895 with a plug-in motion rather than a hinge action. Installing ST7800 Purge Card Page Fig. 14. Flame detector wiring. INFRARED (C7015) ULTRAVIOLET (C7027/C7035/C7044) SOLID STATE SELF-CHECKING ULTRAVIOLET (C7012E,F) SOLID STATE ULTRAVIOLET (C7012A,C) SOLID STATE SELF-CHECKING ULTRAVIOLET (C7061A) C7076A,D ULTRAVIOLET DETECTOR OPERATION Sequence of Operation Initiate Standby Normal Start-Up Prepurge Equipment Recommended General Instructions MAKE SURE THAT ALL MANUAL FUEL SHUT-OFF VALVE(S) ARE CLOSED. call for heat. WARNING CHECKOUT WARNING Equipment Recommended Checkout Summary Preliminary Inspection Flame Detector Acceptable Flame Flame Signal Measurement (Fig. 18 and Table 5) Initial Lightoff Check for Proved Pilot Page Initial Lightoff Check for Direct Spark Ignition Pilot Turndown Test (All Installations using a Pilot) is clipped is not clipped Ignition Interference Test (All Flame Rods) To Eliminate Ignition Interference Hot Refractory Saturation Test (All Infrared Detectors) Hot Refractory Hold-In Test (Rectifying Photocell or All Infrared Detectors) Ultraviolet Sensor, Ignition Spark Response Test (All Ultraviolet Detectors) Response To Other Ultraviolet Sources Flame Signal With Hot Combustion Chamber (All Installations) Safety Shutdown Tests (All Installations) TROUBLESHOOTING EC7895 or RM7895 System Diagnostics Diagnostic Information Index Historical Information Index Page (Continued)