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Pipe connections
XL3
Connection, cold water, blue (28 mm)
XL4
Connection, hot water, red (22 mm)
XL36
Connection, supply line from HP, white (22 mm)
HVAC components
UA1
Submerged tube for temperature sensor, hot
water display
UA2
Submerged tube for temperature sensor, hot
water control
*or another external heat source
VPD 150, 300
Miscellaneous
PF1
Rating plate
PF3
Serial number plate
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
Chapter 3 |
The water heater design
7
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