7800 SERIES

EC7810A, EC7820A Relay Modules

SPECIFICATION DATA

FEATURES

GENERAL

The Honeywell EC7810/EC7820A Relay Module is a microprocessor-based integrated burner control for automatically fired gas, oil or combination fuel single burner atmospheric (EC7810A) or atmospheric with fan (EC7820A) applications. The EC7810A/EC7820A system consists of the relay module, wiring subbase, amplifier and purge card. The optional keyboard display module (KDM) can be mounted on the relay module or on the face of a panel door. The KDM can also be mounted remotely from the panel if this is approved for the application.

The EC7810/EC7820 is programmed to provide a level of safety, functional capability and features beyond the capacity of conventional controls.

The basic functions of the EC7810/EC7820A include automatic burner sequencing, flame supervision, system status indication, system or self-diagnostics and troubleshooting.

???Safety features:

???Interlock check.

???Dynamic AMPLI-CHECK???

???Closed loop logic test.

???Dynamic input check.

???Dynamic safety relay test.

???Dynamic self-check logic.

???Expanded safe-start check.

???Internal hardware status monitoring.

???Low Fire Start Switch test.

???Tamper resistant timing and logic.

???Ignition attempts: 1 or 5. Selectable by model number.

???Access for external electrical voltage checks.

???Application flexibility.

???Dependable, long-term operation provided by microcomputer technology.

???First-out annunciation and system diagnostics provided by a 2 row by 20 column vacuum fluorescent display (VFD) located on the KDM (optional).

???Five sequence information light emitting diodes (LED)???with symbols for Power, Pilot, Flame, Main and Alarm (see Fig. 1).

???Interchangeable plug-in flame amplifiers.

???Nonvolatile memory; EC7810/EC7820 retain history files and sequencing status after loss of power.

???Remote reset (subject to application approval; optional).

???Remote mounting of KDM (subject to application approval).

???Burner control data available on the optional KDM:

???Flame signal strength.

???Hold status.

???Lockout/alarm status.

???Sequence status.

???Sequence time.

???Total cycles of operation.

???Total hours of operation.

???Fault history providing the six most recent faults:

???Cycles of operation at the time of the fault.

???Fault message and code.

???Hours of operation at the time of the fault.

???Sequence status at the time of the fault.

???Sequence time at the time of the fault.

???Diagnostic information:

???Device type.

???Flame amplifier type.

???Flame failure response time (FFRT).

???Manufacturing code.

???On/off status of all digital inputs and outputs.

???Selected prepurge time.

???Software revision and version of relay module and optional KDM.

???Status of configuration jumper.

???Status of Run/Test Switch.

7800 SERIES EC7810A, EC7820A RELAY MODULES

BURNER CONTROL

1

127

Fig. 1 Mounting dimensions of relay module and wiring subbase in millimeters only.

SPECIFICATIONS

Table 1A. EC7810A Terminal Ratings.

a See Table 2.

b 2000 VA maximum connected load to 7800 SERIES Relay Module Assembly.

c Total load current, excluding burner/boiler motor and firing rate outputs cannot exceed 5A, 25A inrush. d Can also be 24 Vac, 3A at PF = 0.5.

e 220-240 Vac to 120 Vac, 10 VA (minimum) stepdown transformer (not provided) required to drive shutter.

7800 SERIES EC7810A, EC7820A RELAY MODULES

Table 1B. EC7820A Terminal Ratings.

a See Table 2.

b 2000 VA maximum connected load to 7800 SERIES Relay Module Assembly.

c Total load current, excluding burner/boiler motor and firing rate outputs cannot exceed 5A, 25A inrush. d Can also be 24 Vac, 3A at PF = 0.5.

e 220-240 Vac to 120 Vac, 10 VA (minimum) stepdown transformer (not provided) required to drive shutter.

Table 2. Recommended grounding practices.

7800 SERIES EC7810A, EC7820A RELAY MODULES

Table 3. Sequence Timing for Normal Operation.

* Standby and Run can be an infinite period.

**Waiting Time is determined by the ST7800A Purge Card selected.

***Second Safety Time is Main Trial Time plus Flame Failure Response Time.

Electrical Ratings (See Tables 1A and 1B):

Voltage and Frequency: 220 to 240 Vac (+10%/-15%), 50/60 Hz (??10%).

Keyboard Display Module (Optional): 13 Vdc peak fullwave rectified (+20%/-15%).

Power Dissipation:

Relay Module: 10W maximum.

KDM: 3W maximum.

Maximum Total Connected Load: 2000 VA.

Fusing (Total Connected Load): 20A, type FRN or equivalent.

Environmental Ratings:

Ambient Temperatures:

Operating: -40??C to 60??C (-40??F to 140??F).

Storage: -40??C to 66??C. (-40??F to 150??F). Humidity: 85% RH continuous, noncondensing. Vibration: 0.5G environment.

Dimensions:

See Fig. 1 and 2.

Weight:

Relay Module: 0,730 kg unpacked.

KDM: 0,113 kg unpacked.

IMPORTANT

Flame Detection System available for use with EC7810/EC7820. Select your plug-in Flame Signal Amplifier and applicable Flame Detector from Table 4.

Approvals:

This product complies with the following European directives: Gas Appliance Directive (90/269/EEG).

Low Voltage Directive (73/23/EEG). EMC Directive (89/336/EEG). GASTEC (CE-63AP3070/1). Factory Mutual: J.I.0Y0A9.AF.

Oil Approvals:

EC7810A1027: DIN-5F104/96.

EC7820A1026: DIN-5F105/96.

EN298: ???Automatic gas burner systems for gas burners and gas burning appliances with or without fans.???

Please note the following to comply with EN60730 for remote mounting of the KDM and/or remote reset. It is necessary to provide electrical separation using insulation at least equivalent to double or reinforced insulation. Accomplish this by either:

???Optically isolating the communication and/or remote reset lines from the control cabinet or

???Providing physical separation from the communication and/or remote reset lines using electrical conduit and a remote display cover assembly (part no. 204718A) or other suitable enclosure that meets IP40 class of protection.

Mounting:

Q7800A Wiring Subbase for Panel Mount: To meet EN60730 requirements, mount the relay module in a secured panel which meets IP40 class of protection.

Required Components:

Plug-in Flame Signal Amplifier: See Table 2.

ST7800A Plug-in Purge Timer Cards: Selectable from two seconds to 30 minutes.

Q7800A Wiring Subbase.

Accessories:

Keyboard Display Modules (KDM) (Optional): S7800A1001 English language. S7800A1035 French language. S7800A1043 German language. S7800A1050 Italian language. S7800A1068 Spanish language. S7800A1118 Katakana (Japanese) language. S7800A1126 Portuguese language. S7800B1009 Chinese language.

7800 SERIES EC7810A, EC7820A RELAY MODULES

Communications:

Q7700B1004 Network Interface Unit with universal 100 to 250 Vac, 50/60 Hz external power supply, external modem required.

QS7800A1001 ControlBus Module, standard. QS7800B1000 ControlBus Module, multidrop. QS7800C1009 ControlBus Module, data acquisition

modules.

QS7800D1008 ControlBus Module, Armstrong. QS7800E1007 ControlBus Module, Pulsafeeder. QS7850A1006 ControlBus Module, General Purpose

Interface.

ZM7850A1001 Combustion System Manager??? Software. ZM7850B1000 SYSNet??? Facilities Integration Software. S7810A1009 Data ControlBus??? Module (if no KDM is

used).

S7810B1007 Data ControlBus??? Module, Multi-Drop Switch Module.

Miscellaneous:

S7820A1007 Remote Reset Module. 203541 Data ControlBus Connector, 5-wire. 203765 Remote Display Mounting Bracket. 221729 Relay Module Dust Cover.

204718A Keyboard Display Module Cover, NEMA 4, clear.

204718B Keyboard Display Module Cover, NEMA 1, clear.

204718C Keyboard Display Module Cover, NEMA 4, clear with reset button.

205321B Flush Display Mounting Kit.

221818A Extension Cable, display, (1524 mm).

221818C Extension Cable, display, (3048 mm).

123514A Rectification Flame Simulator.

203659 Ultraviolet Flame Simulator.

203968A Remote Display Power Supply, 13 Vdc, plug-in.

Table 4. Flame Detection System

a Order flame rod separately; see holder instructions. b Use only Honeywell Photocell part number 38316.

cDynamic Self-Check ultraviolet amplifiers should be used only on burners that cycle on-off at least once every 24 hours. Appliances with burners that remain on continuously for 24 hours or longer should use C7061A Flame Detector with R7861A Amplifier.

dC7027, C7035 and C7044 Flame Detectors should be used only on burners that cycle on-off at least once every 24 hours. Appliances with burners that remain on continuously for 24 hours or longer should use C7061A Flame Detector with R7861A Amplifier as ultraviolet flame detection system.

eCircuitry tests the flame signal amplifier at least 12 times a minute during burner operation and shuts down the boiler if the amplifier fails.

fCircuitry tests all electronic components in the flame detection system (amplifier and detector) 12 times a minute during burner operation and shuts down the burner if the detection system fails.

g A 220/240 Vac to 120 Vac 10 VA step-down transformer (not provided) must be used to drive the shutter.