Connections
½’’
ID
15
ID
19.2
AF
24
220
10
Domestic Hot Water Connection
(continued)
Sensor Well
Vitocell-H 100,
with 42 and 53 USG / 160 and 200 ltr
capacities
Vitocell-H 100 domestic hot water
tank positioned under the boiler
Please note that only the boiler/tank
combinations stated in the Price List are
possible.
Backflow preventers
Where backflow preventers are required, a
domestic water expansion tank installation
is recommended in the cold water inlet
piping before the cold water enters the
Vitocell. For the backflow device, observe
local plumbing codes and regulations.
Temperature and pressure
relief valve
A temperature and pressure relief valve
(T&P relief valve) is supplied with the tank.
The heating contractor must install the valve
on each tank in a method meeting code
requirements.
If local codes require a different relief valve,
consult Viessmann Manufacturing for a
substitute valve. The tank is approved for
150 psig. Maximum operating pressure is
150 psig.
The T&P relief valve supplied with the tank
is manufactured by Watts Industries (Model
40XL-8), set to 150 psig for US and
Canadian installations. The valve is ASME
pressure steam rated for 998 MBH and CSA
temperature steam rated for 200 MBH. It is
tested under ANSI Z21.22 code for Relief
Valves and Automatic Gas Shut-off Devices
for Hot Water Supply Systems. The relief
temperature is set at 210°F / 99°C. The
valve has a male threaded inlet and female
threaded outlet, both ¾” sizes.
Since the heat exchanger coil allows for
high MBH input (see Vitocell flow charts),
confirmation that the appropriate and
correct size pressure and temperature relief
valve is used and installed, is necessary.
Warranty
Our warranty for domestic hot water tanks
states that the water heated must be of
drinking water quality and that any water
treatment equipment in use must function
correctly.
Viessmann accepts no responsibility for
damage howsoever caused and reserves the
right to withdraw the product warranty if
the product has been improperly installed or
misapplied by the installer, contractor or
final user. In order to qualify for product
warranty, strict adherence to the installation
and service manuals must be observed. In
the event that Viessmann non-approved
components are utilized, Viessmann
reserves the right to withdraw all expressed
or implied warranties without written notice.
The water to be heated with the Vitocell
must be drinking (potable) water quality. If
the tank is used to heat other media, the
warranty will be null and void. Damage
resulting from excessive pressure or
temperature is clearly not the responsibility
of Viessmann.
The amount of chloride and sulfate
acceptable to the tank is limited. In areas
where high concentrations of chloride and
sulfate are present in drinking water, please
consult Viessmann for directions.
5167
514
v1.1
To ensure optimum, safe operation,
the supplied stainless steel well must
be installed. The well diameter is
large enough to accommodate a wide
variety of sensing bulbs.
Always use spring clip to ensure
proper contact of capillary bulb
against the stainless steel well for
proper sensing/heat transfer!
WARNING
IMPORTANT
The heating contractor must ensure
the T&P relief valve is sized correctly.
If the factory supplied T&P relief
valve is too small, it must be
upgraded in the field by installing an
adequately sized valve.
WARNING
