System Design Guidelines - Viessmann Vitocell 300-V Technical Data Manual

Vitocell 300-V, EVI Series Technical Data

System Design Guidelines

Sensor well
The supplied stainless steel sensor wells are to be used
for control sensors to ensure maximum operational safety.
Should the supplied sensors not fit into the sensor wells,
other stainless steel sensor wells must be used.
For solar heating systems, Viessmann recommends
placement of the DHW tank temperature sensor in the
solar collector return. This requires a brass elbow with
sensor well included in the accessory pack.
Storage USG
capacity (L) (200)
a in.
(mm) (220)
b in.
(mm) (200)
WARNING
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!
Heating water supply temperature over 230ºF (110ºC)
For these operating conditions, an approved high limit
safety aquastat must be installed to limit the domestic
hot water temperature to 203°F (95°C) in the tank.
Recirculation tapping
The recirculation tapping is on a separate tapping (see
page 5). Cap this opening if the tank is not installed
with recirculation.
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.
53 79 119
(300) (450)
8¾ 8¾
(220) (330)
7¾ 7¾ 12a
(200) (310)
Temperature and pressure relief valve
A 150 psi 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, substitute the manufacturer's
supplied valve. The tank is approved for 100 psig where
a Canadian Registration Number (CRN) is required.
Maximum operating pressure is 150 psig.
The T&P relief 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.
T&P Valve
ASME pressure
steam rating
CSA temperature
steam rating
Relief
13 temperature
Inlet thread
Outlet thread
Warranty consideration
Viessmann DHW tanks require that the water heated
should be of drinking water quality and that any water
treatment equipment in use must function correctly.
If the product has been improperly installed or misapplied
by the installer, contractor or final user, Viessmann
accepts no responsibility for damage howsoever caused
and reserves the right to withdraw the product warranty.
In order to qualify for product warranty, strict adherence
to the installation and service manuals must be observed.
In the event that components not approved by Viessmann
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.
For full warranty details, please read the product warranty
sheet.
Product Installation
100 psig (where 150 psig
CRN is required)
see ratings marked on T&P valve
205 MBH 205 MBH
210°F (99°C) 210°F (99°C)
c" male c" male
c" female c" female
15