Component location,
rear
List of components
Pipe connections
Pipe connections
Connection, heating medium supply line Ø22 mmXL1
Connection, heating medium return line Ø22 mmXL2
Connection, cold water Ø22 mmXL3
Connection, hot water Ø22 mmXL4
Connection, hot water circulation Ø15 mm*XL5
Connection, docking from heat pump Ø22 mmXL8
Connection, docking to heat pump Ø22 mmXL9
*This connection cannot be seen in component placing pictures of stainless
steel products. Located on the rear of the product’s valve connector.
HVAC components
HVAC components
Expansion vessel, closed, heating mediumCM1
Safety valve, water heaterFL1
Safety valve, heating mediumFL2
Heating medium pump, charge pump/heating
medium
GP1
Filler valve, heating mediumQM11
Filler valve, heating mediumQM13
Venting valve, climate systemQM20
Venting valve, coilQM22
Shut-off valve, heating mediumQM31
Shut-off valve, incoming cold waterQM35
Reversing valve, climate system/water heating,
flow line
QN10
Check valve, cold waterRM1
TundishWM1
Sensors etc.
Sensors etc.
Flow meterBF1
Manometer, heating systemBP5
Temperature sensors, heating medium flowBT2
Temperature sensors, heating medium returnBT3
Temperature sensor, hot water, chargingBT6
Temperature sensor, hot water, topBT7
Temperature sensor, heating medium supply after
immersion heater
BT63
Thermostat, standby modeFQ10-
BT30
Electrical components
Electrical components
Immersion heater cardAA1
AA1-S2 Switch (DIP switch) on circuit board
Base cardAA2
Input circuit boardAA3
Display unitAA4
AA4-XF3 USB socket
AA4-XF4 Service socket
Immersion heaterEB1
Miniature circuit-breakerFC1
Temperature limiterFQ10
Resetting temperature limiterFQ10-S2
Electrical anodeFR1
Main switchSF1
Network cable for NIBE Uplink
TM
W130
Miscellaneous
Miscellaneous
Rating platePZ1
Serial number platePZ3
Cable glandUB1
Cable glandUB2
Inspection panel, vessel, Ø80 mmQQ1
Designations according to standard EN 81346-2.
15Chapter 3 | Indoor module's designNIBE VVM 225