Digital boiler control unit for use with boiler models vd2a, vd2 and ct3 (120 pages)
Summary of Contents for Viessmann EM-S1
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VIESMANN Installation and service instructions for contractors Solar EM-S1 extension ADIO electronics module Function extension for connecting a solar thermal system Solar EM-S1 extension Please keep safe. 6151118 GB 1/2020...
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Safety instructions Safety instructions Please follow these safety instruc- tions closely to prevent accidents and material losses. Safety instructions explained Danger Note This symbol warns against the risk Details identified by the word "Note" of injury. contain additional information. Please note This symbol warns against the risk of material losses and environmen- tal pollution.
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Viessmann. water pipes to discharge static loads. Repair work Please note Repairing components that fulfil a safety function can compromise the safe operation of the system. Replace faulty components only with genuine Viessmann spare parts.
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Safety instructions Safety instructions (cont.) Safety instructions for operating the system If you smell gas Condensate Danger Danger Escaping gas can lead to explo- Contact with condensate can be sions which may result in serious harmful to health. injury. Never let condensate touch your Do not smoke.
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Safety instructions Safety instructions (cont.) Danger The simultaneous operation of the boiler and appliances that exhausts air to the outside can result in life threatening poisoning due to a reverse flow of flue gas. Fit an interlock circuit or take suita- ble steps to ensure an adequate supply of combustion air.
Connecting several accessories ............13 Power supply and PlusBus connection ..........13 ■ Commissioning Configuring the solar EM-S1 extension ..........14 Troubleshooting Faults displayed with a fault code ............15 Faults displayed without a fault code ............. 15 Repairs ....................15 Checking the solar circuit pump at output P1 ........
Information Disposal of packaging Please dispose of packaging waste in line with statu- tory regulations. Symbols Symbol Meaning Reference to other document containing further information Step in a diagram: The numbers correspond to the order in which the steps are carried out. Warning of material losses and environ- mental pollution Live electrical area...
Information System examples For available system examples, see www.viessmann- schemes.com Spare parts lists Information about spare parts can be found at www.viessmann.com/etapp or in the Viessmann spare part app.
Installation sequence Rotary switch S1 Set rotary switch S1 to 0 (factory setting is 1). Note The rotary switch can be found on the PCB of the elec- tronics module. Fig. 3 Connecting the PlusBus to the heat generator Note For connection to heat generators with external plug, luster terminals or spring-loaded terminals for bus con- nection, disconnect plug...
Installation sequence Power supply Power supply at heat generator Create the power supply connection. Route the power cable to the heat generator and con- nect to plug . Observe fuse protection of the output at the heat generator. If power is supplied to a further accessory, use plug A provided fÖ...
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Installation sequence Power supply (cont.) Connect the power supply in accordance with the dia- gram. If the power supply to the appliance is connected with a flexible cable, ensure that the live conductors are pulled taut before the earth conductor in the event of strain relief failure.
Installation sequence Connecting several accessories Power supply and PlusBus connection Power supply to all accessories via heat generator control unit Fig. 7 Some accessories with direct power supply Fig. 8 Heat generator control unit ON/OFF switch Mixer extension kit for heating circuit with fÖ...
Commissioning Configuring the solar EM-S1 extension The parameters for the solar EM-S1 extension are set Heat generator installation and service instruc- at the heat generator control unit. tions...
Troubleshooting Faults displayed with a fault code Meaning of the fault codes Heat generator installation and service instruc- tions Faults displayed without a fault code Fault Cause Remedy Solar yield too low Temperature sensors inter- Check temperature sensor connections. changed. Air in the solar circuit Vent the solar circuit.
Troubleshooting Repairs (cont.) Checking the temperature sensors 1. Disconnect the plug of the relevant temperature sensor from the extension. Check the sensor [{] [{] [{] [{{] resistance. & 2. Compare the sensor resistance with the curve (see the following diagram). 3.
Function description Function description of solar DHW heating Note Set or alter the functions described below in the parameters in the "Solar" group. Parameter Description Number Designation The solar circuit pump is switched on according to the following criteria, resulting in the DHW being heated: 1126.0 "Collector minimum tempera-...
DHW cylinder is reduced, which delays stag- nation. Collector frost protection Viessmann collectors are filled with Viessmann heat To prevent damage to the collectors, the solar circuit transfer medium. Consequently, this function does not pump is switched on if the collector temperature falls need to be enabled.
Specification Specification Rated voltage 230 V∼ Rated frequency 50 Hz Rated current Power consumption – electronics Power consumption 9 mA Permissible ambient temperature Operation 0 to +40 °C ■ Storage and transport 20 to +65 °C ■ – Rated relay output breaking capacity P1 (solar circuit pump) 1 A 230 V~ ■...
Declaration of Conformity Declaration of conformity Declaration of Conformity We, Viessmann Werke GmbH & Co. KG, D-35107 Allendorf, declare as sole responsible body that the named product complies with the European directives and supplementary national requirements in terms of its design and operational characteristics.
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Keyword index Keyword index Collector minimum temperature......... 17 Reheating suppression..........17 Configuration..............14 Repairs...............15 Connection and wiring diagram........19 Sensor curves............16 Electrical connections..........9 Setting functions............14 Solar DHW heating............ 17 Specification...............19 Fault codes..............15 Stagnation time reduction.......... 18 Fault messages............15 Suppression of reheating........... 17 Fault removal.............
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