Connections
16
Boiler Water/Solar Loop Connections
H
Maximum working pressure on the
heat exchanger side of up to
150 psig / 10 bar
H
Maximum working pressure on DHW
side of up to 150 psig / 10 bar
H
Maximum supply temperature on the
heat exchanger side of up to
230ºF / 110ºC
H
Maximum DHW supply temperature of
up to 150ºF / 65.6ºC
Individual DHW tank
Hot water heating boiler
Recirculation pump
Spring-loaded flow check valve
Boiler water supply
DHW tank temperature sensor well /
aquastat well
Vitocell 100
Boiler water return
This is a simplified conceptual drawing
only! Piping and necessary componentry
must be field verified. Proper installation
and functionality in the field are the
responsibility of the heating contractor.
1.
Pipe together boiler and tank as
illustrated. Connections must be
accessible for service (use factory
supplied adaptors). Viessmann
flexible piping of stainless steel
(accessory) may be used.
2.
For:
- boiler water supply temperatures
above 203°F / 95°C and
- 92 and 120 USG / 300 and 450 ltr
tanks:
Remove plastic supply and return
grommets (grommets are
left-threaded).
3.
Pipe supply line with an incline and
install componentry as follows:
H
flow check valve, to stop gravity
circulation of hot water back to the
boiler when the boiler temperature
is lower than the actual tank temp.
H
automatic air vent, at the high point
from the boiler supply to the tank
heat exchanger
H
drain valve, on the boiler return
piping from the tank heat
exchanger coil
H
isolation valve, on the boiler supply
and boiler return piping to the tank
coil.
Domestic hot water temperatures
over 125°F / 52°C can cause severe
burns instantly or death from scalds.
Children, disabled and elderly are at
highest risk of being scalded.
Feel water before bathing or
showering.
Temperature limiting valves are
available and must be used where
domestic hot water storage tank
temperatures exceed 140°F / 60°C.
DANGER
The operating aquastat and any
secondary high limit aquastat of the
tank must be set such that the DHW
temperature inside the tank never
exceeds 210°F / 99°C.
WARNING
5
1
6
7
5
1
9
v
2
.2
Fig 16.
Recommended piping of an individual tank
Install tempering valve(s) to protect
against scalding.
WARNING
IMPORTANT
