Viessmann Vitocell 100-B CVB Series User Manual

17
5608 488 v1.2
Vitocell 100-B Installation Instructions
Set-up and Connections
Domestic Water Connections (continued)
WARNING
The discharge line for the T&P valve must be oriented
to prevent scalding of attendants.
IMPORTANT
Always ensure the use of type approved devices.
Safety devices include the following components:
In situations where a booster pump is used to maintain
DHW pressure, Viessmann strongly recommends the
installation of an oversized expansion tank to ensure
longer, less frequent pump cycles with less severe
pressure gradients. If possible, use flexible piping before
and after booster pump to isolate system piping from
vibration and shocks.
- Temperature and pressure relief valve
A temperature and pressure relief valve (T&P 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 valve supplied with the tank is tested under
ANSI Z21.22 Code for Relief Valves and Automatic
Gas Shut-off Devices for Hot Water Supply Systems.
WARNING
The valve test lever must be operated at least once per
year by a licensed professional heating contractor to
ensure that waterways are clear. A licensed
professional heating contractor shall reinspect the T&P
valve at least once every three years. Failure to inspect
can result in unsafe temperature or pressure build-up,
which can result in death, serious injury or substantial
product/property damage.
- Isolation valves
- Drain valve
- Pressure reducing valve where required by local jurisdiction
- Drinking water filter where required by local jurisdiction
- Backflow preventer
Where backflow preventers are required, a domestic
water expansion tank installation is required in the cold
water inlet piping before the cold water enters the tank.
The backflow device must be installed according to
the manufacturer’s installation instructions. Observe
local codes and regulations.
- Tempering valve
A tempering valve must be field installed where storage
tank (domestic hot water temperature) exceeds local
restricted temperatures or 140° F (60° C). Check code
requirements.
Proper installation of the T&P valve shall include all of the
following:
- The T&P valve shall be installed in the pipe connection
point marked TPV in the tank instruction manual.
- The discharge line from the T&P valve shall be ¾ in.
(1.9 cm) 7 and run to a safe place of discharge
approximately 1 ft. (30 cm) above the floor, close to
a floor drain.
- The discharge line must be as short as possible and
pitch downward from the T&P valve and terminate plain.
- DO NOT route discharge line to the outdoors.
- DO NOT install any type of valve or an obstruction
of any kind between the tank and the T&P valve or
between the T&P valve and the discharge line outlet.
Watts Model 40XL-8 150 psig
ASME pressure
steam rating
1438 MBH
CSA temperature
steam rating
205 MBH
Relief temperature 210° F (99° C)
Inlet thread
c” male
Outlet thread
c” female

Viessmann Vitocell 100-B CVB Series Specifications

General

Brand	Viessmann
Model	Vitocell 100-B CVB Series
Category	Water Heater
Language	English