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Honeywell EC7850A1072 integrated burner control relay module

Honeywell EC7850A1072
Honeywell EC7850A1072
Honeywell EC7850A1072

Honeywell EC7850A1072 integrated burner control relay module

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HONEYWELL
✦
7800
SERIES
 
BURNER
CONTROL
SYSTEM
MICROPROCESSOR-BASED RELAY MODULE
EC7850A1072
Automatic burner sequencing and flame supervision
POWER
220–240
V AC
+10% / −15%
FREQUENCY
50 / 60
Hz
Supply frequency
POSTPURGE
2 sec
Specified model setting
The EC7850A system uses compatible wiring subbase, flame signal amplifier and ST7800A purge timer card as required by the configuration.
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7800 SERIES BURNER CONTROL

HONEYWELL EC7850A1072

FULL MODULATION   /   GAS OR OIL   /   220-240 VAC

A microprocessor-based relay module for automatically fired single-burner applications. It coordinates the full-modulation sequence, supervises flame, checks critical interlocks and provides operating status and fault support when assembled with the required 7800 SERIES components.
         
INITIATE PURGE IGNITION MAIN FLAME RUN
VERIFY THE COMPLETE 7800 SERIES ASSEMBLY BEFORE ORDERING
Send the exact article number and installed-system details for a focused compatibility check.
 EMAIL MIYA WHATSAPP 86-18020776792
Electrical platform

220 to 240 Vac, 50/60 Hz EC-series supply. The relay module uses the Q7800 wiring subbase interface and external field wiring for burner motor, ignition, pilot and main fuel valve circuits.		 Safety behavior

Automatic sequencing includes safe-start checks, dynamic internal tests, airflow supervision, high-fire purge switch checking and low-fire start switch checking for the full-modulation path.		 Service visibility

Five front LEDs indicate power, pilot, flame, main and alarm. An optional keyboard display supports status, first-out annunciation, fault review and setup interaction.
COMPLETE ASSEMBLY

Relay Module Plus Matched Plug-In Components

EC7850A1072
Relay logic and sequence		 + Q7800
Wiring subbase		 + R78xx
Flame amplifier		 + ST7800A
Purge timer card

The relay module alone is not a complete burner safeguard assembly. Selection must account for supply voltage, flame detector and amplifier pairing, purge duration, safety-time variant, subbase wiring and the firing-rate motor arrangement. The Run/Test switch supports controlled checks during commissioning by qualified burner technicians.

SERIES RELATIONSHIP

Why EC7850A Is the Full-Modulation Choice

FAMILY MEMBER BURNER MODE SELECTION EMPHASIS
EC7830A On/off power burner Use where a two-position firing sequence is required.
EC7850A1072 Full modulation Adds high-fire purge and low-fire start positioning checks.
RM7850A Full modulation 120 Vac platform; not a voltage-equivalent substitute for the EC model.
PURCHASING FAQ

EC7850A1072 Questions

Is EC7850A1072 a complete burner control assembly?
No. A compatible Q7800 subbase, flame amplifier and purge card are required; a keyboard display is optional.		 Can EC7850A1072 replace an RM7850A directly?
Do not treat them as voltage equivalents. EC7850A uses 220-240 Vac while RM7850A is the 120 Vac platform; wiring and all plug-in components must be checked.
Which flame detector works with EC7850A1072?
The detector must match a compatible plug-in R78xx amplifier. Selection depends on flame type, detector technology and the required self-check behavior.		 Why must the purge card be checked for EC7850A1072?
The ST7800A card establishes purge timing. Reusing an unmatched card can produce an incorrect sequence for the burner application.
What should be supplied for an EC7850A1072 quotation?
Provide the exact relay suffix, supply voltage, subbase, purge-card number, flame amplifier, detector type and burner sequence requirements so the assembly can be matched accurately.
Returns and replacement support: Contact us within seven days of receipt if an issue is found. Keep the item in its original condition and state the return reason. A return or replacement can be arranged after inspection; the buyer covers shipping charges.
 
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Send the exact article number and installed-system details for a focused compatibility check.
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NEED ANOTHER BURNER CONTROL COMPONENT?
Send the exact article number and installed-system details for a focused compatibility check.
 EMAIL MIYA WHATSAPP 86-18020776792
Sales manager: Miya Zheng   |   Email: sales@amikon.cn   |   Phone / WhatsApp: 86-18020776792
Hot Tags : Honeywell EC7850A1072 EC7850A1072 EC7850A1072 datasheet EC7850A1072 PDF EC7850A1072 manual
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