Viessmann VITOCELL 300B User manual

300litre capacity 500litre capacity
VITOCELL 300B
Installation instructions
for contractors
Vitocell300B
TypeEVB
DHW cylinder with internal indirect coils
300 and 500 litre capacity
5592782GB3/2007

2
Safety instructions
Please follow these safety instructions closely to prevent accidents and
material losses. For safety instructions in conjunction with boilers, see
separate installation instructions.
Safety regulations
Installation, commissioning,
inspection, maintenance and
repairs must only be carried out
by a competent person (heating
engineer/ installation contractor).
Observe all current safety
regulations as defined by DIN,
EN, DVGW, TRGI, TRF and VDE or
locally applicable standards.
See also the "Safety instructions" in
the "Vitotec technical documentation"
folder.
Before working on the equipment/
heating system, isolate the power
supply (e.g. by removing a separate
mains fuse or by means of a main
isolator) and safeguard against
unauthorised reconnection.
¨Safety instructions
In this instruction manual, this
heading denotes information which
must be observed to prevent
accidents and material losses.
¨This symbol denotes important
information which must be
observed to prevent material
losses.
Product information
DHW cylinder with internal indirect coils, made from stainless steel for
heating domestic hot water in conjunction with boilers, district heating or
low temperature heating systems for dual−mode operation.
300 and 500litre capacity
Suitable for systems conforming to DIN1988, DIN4751 and DIN4753.
DIN registration applied for.
5592782GB

3
DHW cylinder installation
General information
¨Safety instructions
Install the DHW cylinder in a
frost−protected and draught−free
room. Otherwise it must be drained
when not in use and there is a risk
of frost.
Provide adequate clearance from
the wall so that the thermostat can
be operated (if installed).
!Please note
The thermal insulation must
not be able to come into
contact with naked flames.
Exercise caution when welding
and soldering.
Aonly for 300litres capacity:
Equipotential bonding
(outer jacket)
HR1 Heating water return*1
HR2/STS Heating water return
and cylinder temperature
sensor for solar operation*2,3
HV1 Heating water flow*1
HV2 Heating water flow*2
KW Cold water
STS Cylinder temperature sensor
or control thermostat
(upper internal indirect coil)
STS/TH Cylinder temperature sensor
or control thermostat and
thermometer sensor
(lower internal indirect coil)*3
WW DHW
Z DHW circulation
*1The upper internal indirect coil is provided for connection to a boiler or a heat pump.
*2The lower internal indirect coil is provided for connection to solar collectors or heat
pumps.
*3Recommended arrangement of the cylinder temperature sensor for solar operation:
With threaded elbow (accessory) in the heating water return.
5592782GB
Z
WW
HV1
KW
A
HR1
HR2/STS
STS/TH
HV2
STS

4
DHW cylinder installation (cont.)
Installing a DHW cylinder with 300litres capacity
1. Level the DHW cylinder with its
adjustable feet.
¨Safety instruction
Never extend the adjustable feet
beyond a total length of 35mm.
2. Remove the top panel and the
thermal insulation mat.
3. Affix the cable channel.
4. Route the sensor lead of the lower
thermometer through the opening
and the cable channel.
5. Seal in the reducing connections
and sensor wells.
6. Secure the thermometer sensor
on the outside of the contact
spring of the sensor retainer (not
in the groove) so that it is flush
with the front of the spring.
Note
Never wrap insulating tape around
the sensor.
7. Insert the sensor retainer together
with the sensor into the lower
sensor well until it bottoms out.
5592782GB
3.
5.
5.
1.
2.
4.
7.
6.

5
DHW cylinder installation (cont.)
Installing a DHW cylinder with 500litres capacity
!Please note
The thermal insulation must not be able to come into contact with
naked flames. Exercise caution when welding and soldering.
All components required for fitting the thermal insulation can be found in the
thermal insulation carton.
1. Remove the pack containing the
type plate from the cylinder body,
and keep safe.
2. Push the thermal insulation mat
underneath the DHW cylinder.
3. Level the DHW cylinder with its
adjustable feet.
¨Safety instruction
Never extend the adjustable feet
beyond a total length of 35mm.
5592782GB
1.
3. 2.

6
DHW cylinder installation (cont.)
1Push the thermal insulation jacket
onto the flange.
2. Route the sensor lead of the upper
thermometer (shorter lead) and
the lower thermometer (longer
lead) through the opening and
push in the thermometers.
3. Guide the sensor of the lower
thermometer over the cylinder
body to the back of the cylinder
and out through the cut−out in the
thermal insulation for the heating
water flow (HV2 see page3).
Note
Install the sensor into the sensor
well as shown on page8.
4. Close the hooks on the closure
strips.
5. Insert the sensor of the upper
thermometer into the hole of the
cylinder cap until it bottoms out,
then secure with a clip to prevent
pulling out.
6Position the thermal insulation
mat and lid.
7. Push the logo (from the type plate
pack) into the lid.
5592782GB
2.
6.
4.
1.
5. 7.
3.

7
DHW cylinder installation (cont.)
1. Seal in the reducing connections.
2. Seal in the sensor well.
3. Affix the type plate.
5592782GB
1.
1.
2.
2.
3.

8
Installing the sensor well and the cylinder temperature sensor
HThe cylinder temperature sensor for the heating side is supplied in the
package of the appropriate control unit. The solar side cylinder temperature
sensor is supplied in the package of the solar control unit.
HSecure the sensor on the outside of the contact spring of the sensor retainer
(not in the groove) so that it is flush with the front of the spring.
HNever wrap insulating tape around the sensor.
HInsert the sensor retainer together with the sensor into the sensor well until
it bottoms out.
¨Safety instruction
For the sake of maximum operational reliability, use the sensor well supplied
for the control unit sensor. If the sensor to be used does not fit this sensor
well, use a different stainless steel sensor well (1.4571 or 1.4435).
5592782GB
2.
1.
3.
5.
4.
4.
5.
6.

9
Installing the cylinder temperature sensor for solar operation
In case of solar operation, install the cylinder temperature sensor with a
threaded elbow (accessory) into the heating return (solar return).
Insert the sensor until it bottoms out inside the sensor well.
300litres capacity
500litres capacity
5592782GB
3.
1.
2.
3.
2.
1.

10
Connecting the earth bonding
Connect the earth bonding in
accordance with the requirements
stipulated by your local electricity
supply company and current local
regulations.
5592782GB

11
Connecting the heating water side
Note
HAdjust the control thermostat and high limit safety cut−out to ensure that
the DHW temperature inside the DHW cylinder never exceeds 95 ºC.
HConnect the pipework with detachable fittings.
Permiss. temperatures
Hsolar side 200ºC
Hheating water side 200ºC
HDHW side 95ºC
Permiss. operating pressure
Hsolar side 25bar
Hheating water side 25bar
HDHW side 10bar
Test pressure
Hsolar side (primary) 40bar
Hheating water side (primary)40bar
HDHW side (secondary) 13bar
Heating DHW through solar collectors
via the lower internal indirect coil and heat supply for reheating or
heating the DHW by means of a boiler via the upper internal indirect coil
(parallel operation)
ASolar panel
BDHW cylinder
CFill valve
DManual solar fill pump
HK Heating circuit
K Oil/gas fired boiler
KW Cold water
WW DHW
5592782GB
D
C
A
B
HK
K
WW
KW

12
Connecting the heating water side (cont.)
1. Only for heating water flow
temperatures above 95ºC:
Remove the cover bezels from the
heating water side pipe outlets
(bezels have l.h. threads).
2. Install the flow line with an incline
and fit an air vent valve at its
highest point.
4. Only for heating water flow
temperatures above 110ºC:
Install an additional type−tested
high limit safety cut−out, if none
has so far been installed in the
system. For this, use a twin
thermostat (temperature limiter
and high limit safety cut−out).
3. Only for systems with solar
operation install an additional
high limit safety cut−out, if the
following water volume is heated
perm2absorber area:
HLess than 30litre DHW volume
when using Vitosol flat plate
collectors,
HLess than 100litre DHW volume
when using Vitosol tube
collectors.
For this, install the cylinder cap
with R ¾" nipple (accessory).
5. Close test ports that are not used
for the installation of a sensor.
Connecting the domestic hot water side
General information
For connecting the DHW side, observe DIN1988 and DIN4753.
Note
HConnect the pipework with detachable fittings.
HSeal connections that are not required with red brass caps.
HEquip the DHW circulation line with a circulation pump, check valve and
time switch. Only a restricted gravity operation is possible.
HAlways install the cylinder banks with connected DHW circulation.
5592782GB

13
Connecting the domestic hot water side (cont.)
ASpring−loaded check valve
BVisible blow−off pipe outlet
AV Shut−off valve
DFR Flow regulating valve
DMV Pressure reducer
EV Drain valve
KW Cold water
MA Pressure gauge connection
MAGW Diaphragm expansion
vessel, suitable for potable
water
RV1 Non−return valve
RV2 Non−return valve/pipe
separator
SIV Safety valve
TF Drinking water filter
WW DHW
Z DHW circulation pipe
ZP DHW circulation pump
Notes regarding the safety valve
The system must be equipped with
a type−tested diaphragm safety valve
as protection against overpressure.
Permiss. operating pressure: 10bar.
The connection diameter of the
safety valve must be at least
R¾" (DN20).
Consequently, the max. permissible
input would be 150kW.
If the heating load of the DHW
cylinder lies above the max. heating
load allocated to the capacity, select
a larger safety valve that is big
enough for the actual heating load
(see DIN47531, issue3/88,
section6.3.1).
Install the safety valve in the cold
water pipe. It must not be able to be
isolated from the DHW cylinder.
The pipework between the safety
valve and the DHW cylinder must not
be restricted in any way. The safety
valve blow−off line must not be able
to be closed. Expelled water should
be safely and visibly drained into a
dewatering unit. It is advisable to
place a sign close to the safety valve
blow−off line or on the safety valve
itself with the following inscription:
"For safety reasons, water may be
discharged from the blow−off line
during heating. Never seal off."
The safety valve should be
installed above the top edge of
the DHW cylinder.
5592782GB
B
WW
A
Z
ZP
SIV
WW
KW
AV DFR MA
RV1
EV AV AV EV TF DMV AV
RV2
KW
KW
MAG−W

14
Fitting the cover
300litre capacity
500litre capacity
5592782GB

15
Commissioning
For commissioning the
DHW cylinder, see
"Service Instructions".
5592782GB

Viessmann Werke GmbH&Co KG
D35107 Allendorf
Tel: [phone]0
Fax: [phone]2780
www.viessmann.de
Viessmann Limited
Hortonwood 30, Telford
Shropshire, TF1 7YP, GB
Tel: [phone]
Fax: [phone]
E−mail: info−[email protected]
16
5592782GBSubject to technical modifications.
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