Viessmann VITOMAX 200-HS M73A Installation Instructions Manual page 9

Connecting the boiler on the steam side
Note
Illustration of the fitting assembly refers to modulating operation. Provide two further
pressure regulators for stepped operation; the pressure transducer for the burner
control will then not be required.
1 Platform
2 Control panel
See separate documentation
3 Integral economiser
4 Connection line between econo-
miser and boiler
5 Feedwater pump (module)
6 Burner
qP Level electrode
(WR – water level control)
qQ Level electrode
(HW – maximum water level)
qW Level electrode
(NW – minimum water level)
qE Accessory, flanged connection
DN 100
qR Accessory, flanged connection
DN 100
qT Conductivity electrode
wP Safety valve
(cont.)
wQ Air vent shut-off valve
wW Steam shut-off valve
wE Feedwater shut-off valve
wR Feedwater non-return valve
wT Blow-down shut-off valve
wZ Blow-down valve
wU T.D.S. shut-off valve
wI T.D.S. valve
wO Mating flange DN 20
eQ Air vent valve for Economiser
rP Water level indicator
rQ Pressure gauge
rW Maximum pressure limiter
rE Pressure transducer
rR Straight-through shut-off valve with
cap (option)
rT Dial thermometer
rZ Sampling cooler
9