7800 SERIES EC7810A, EC7820A RELAY MODULES
Table 3. Sequence Timing for Normal Operation.
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| First |
| Main |
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| Purge or |
| Safety | Pilot | Trial | Main |
| Ignition |
Device | Initiate | Standby | Waiting | Preignition | Time | Stab. | Time*** | Stab. | Run | Attempts |
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EC7810A1027 | 2 sec | * | ** | 3 sec | 5 or 10 sec | 5 sec | 5 or 8 sec | 5 sec | * | 1 |
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EC7810A1035 | 2 sec | * | ** | 3 sec | 5 or 10 sec | 5 sec | 5 or 8 sec | 5 sec | * | 5 |
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EC7820A1026 | 2 sec | * | ** | 3 sec | 5 or 10 sec | 5 sec | 5 or 8 sec | 5 sec | * | 1 |
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EC7820A1034 | 2 sec | * | ** | 3 sec | 5 or 10 sec | 5 sec | 5 or 8 sec | 5 sec | * | 5 |
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* 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
Keyboard Display Module (Optional): 13 Vdc peak fullwave rectified
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:
Storage:
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
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
Oil Approvals:
EC7810A1027:
EC7820A1026:
EN298: ÒAutomatic gas burner systems for gas burners
and gas burning appliances with or without fans.Ó
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:
ST7800A
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.
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