Viessmann AWT 221.A04, Installation And Service Instructions For Contractors

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Parameters for external functions
Parameter Setting
External demand
If applicable
"Internal hydraulics"
Ó
"Flow temperature for external demand 730C" Set flow temperature for external de-
mand
External starting of the compressor; mixer in control mode or OPEN
"System definition"
Ó
"Effect of external demand on heat pump/heating circuits
7014" "0" to "7"
(Observe parameter "Flow tempera-
ture for external demand 730C" )
External changeover of the operating status of various system components
"System definition"
Ó
"System components for external changeover 7011" "0" to "127"
"Operating status for external changeover 7012" "0" to "3"
"Duration of external changeover 7013" "0" to "12"
External blocking of compressor and pumps
"System definition"
Ó
"Effect of external blocking on pumps/compressor 701A" "0" to "31"
External blocking of the compressor; mixer in control mode or CLOSED
"System definition"
Ó
"Effect of ext. blocking on heat pump/heating circuits 7015" "0" to "8"
"Effect of external blocking on pumps/compressor 701A" "0" to "31"
Type AWT-AC: parameters for cooling function
Parameters Setting
"Cooling"
Ó
"Cooling function 7100" "3"
"Cooling circuit 7101" "1" Heating circuit A1/HC1
"2" Heating circuit M2/HC2
"4" Separate cooling circuit SKK
Parameters for instantaneous heating water heater
Parameter Setting
"Electr booster heater"
Ó
"Enable instantaneous heating water heater 7900" "1"
"Output for instant. heating water heater at power-OFF 790A" "1" 3 kW
"2" 6 kW
"3" 9 kW
Enabling instantaneous heating water heater for DHW heating
"DHW"
Ó
"Enable electric heaters for DHW heating 6015" "1"
Commissioning, inspection, maintenance
Commissioning the system
(cont.)
5776 028 GB