Installation Instructions
for use by contractors
Vitosol 200-F, SVK
Flat-plate collector for sloping roofs; above roof installation
Vitocell 100-W, CVBA
Dual coils DHW tank with Solar-Divicon
Vitocell 100-W, CVSA
Single coil and heating element DHW tank with Solar-Divicon
VITOSOL
DHW SOLAR PACK
r
IMPORTANT
Product may not be exactly as shown
5546 417 - 03 07/2015
Read and save these instructions
for future reference.
Please file in Service Binder
Safety
Vitosol DHW Solar Pack Installation
Safety, Installation and Warranty Requirements
Please ensure that these instructions are read and understood before commencing installation. Failure to comply with
the instructions listed below and details printed in this manual can cause product/property damage, severe personal
injury, and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information
found in manual subsections).
Licensed professional heating contractor
The installation, service, and maintenance of this
equipment must be performed by a licensed professional
heating contractor.
CAUTION
Gloves and eye protection must be worn when handling
solar panels.
Please see section entitled “Important
Regulatory and Installation Requirements"
in the Installation Instructions.

Product documentation
Read all applicable documentation before commencing
installation. Store documentation in a readily accessible
location for reference in the future by service personnel.
For a listing of applicable literature,
„
please see section entitled Important
Regulatory and Safety Requirements"

Advice to owner
Once the installation work is complete, the heating
contractor must familiarize the system operator/ultimate
owner with all equipment, as well as safety precautions/
requirements, shut-down procedure, and the need for
professional service annually.

Warranty
Information contained in this and related
product documentation must be read and
followed. Failure to do so renders warranty
null and void.

Grounding/Lightning protection of the solar system
In the lower part of the building, install an electrical
conductor on the piping system of the solar circuit in
compliance with local regulations.
Connection of the solar system to a new or existing
lightning protection or the provision of local grounding
should only be carried out by a licensed professional,
who must take into account the prevailing conditions
on site.
CAUTION
Observe maximum load and distance from edge before
installing the substructure to the roof. If necessary,
consult with a structural engineer to determine if the
structure is suitable for installing solar collectors.
The collectors must be securely mounted so that the
mountings can withstand intense wind conditions and
local snow loads.
2
CAUTION
Solar panel connection pipes and solar heating fluid can
become hot enough to cause severe burns. Extreme
caution must be taken if panels have been in a stagnant
condition (no flow of fluid).
CAUTION
Avoid scratching or sudden shocks to glass cover of the
solar panel.
CAUTION
Never step on collectors or solder in close proximity to
the glass surface of the solar panel.


Applicability
Vitosol solar collectors are designed for use in closed
loop heating systems for domestic hot water heating,
space heating and pool heating via a heat exchanger.
The use of Viessmann heat transfer medium “TyfocorHTL” or equivalent is strongly recommended.
In areas with extremely cold climate conditions,
where outside temperatures may drop below -31°F
(-35°C), the use of Tyfocor-HTL is not recommended.
Use a solar propylene glycol mixture with a higher
concentration of glycol that provides the level of freeze
protection required for the area of the collector
installation.
IMPORTANT
Pool water or potable water should not be pumped
directly through the Vitosol collectors. Damage to
collectors caused by corrosion, freezing or scaling will
void the warranty.
5546 417 - 03

Vitosol DHW Solar Pack Installation
Table of Contents
Page
Safety
Safety, Installation and Warranty Requirements..............2
Important Regulatory and Installation Requirements........4
General Information
About these Installation Instructions..............................5
Notes on Installation..................................................6
Collector Location.......................................................6
Product Information CVBA ..........................................7
Product Information CVSA ..........................................8
5546 417 - 03
Installation
Installing on Sloped Roofs............................................9
Installing and Connecting the Collectors.......................13
Collector Roof Layout................................................15
Fitting the Collector Temperature Sensor.....................16
Disassembly Information............................................17
Siting Information..................................................18
Checking the Anode Connection...............................19
Fitting the Cover.......................................................20
Fitting the Solar Expansion Tank.................................21
Fitting Tank Temperature Sensor (CVBA only)..............22
Electric Heating Element ............................................23
Connecting the Electric Heating Element......................24
Fixed High Limit and Electric Heating Element
Temperature Adjustment............................................25
Connecting the Solar Control Unit - DeltaSol BX...........26
Making the Connections on the Heating Water
and Solar Sides CVBA...............................................27
Making the Connections on the Heating Water
and Solar Sides CVSA...............................................28
Making the Connections to the Solar Piping.................29
Connections on the DHW Side...................................30
Commissioning.........................................................31
3
Safety
Vitosol DHW Solar Pack Installation
Important Regulatory and Installation Requirements
Initial start-up
Initial start-up must be performed by a qualified heating
contractor. Completion of the Maintenance Record by
the heating contractor is also required.
See the Maintenance Record in the
Operating and Service Instructions.
Working on the equipment
The installation, adjustment, service and maintenance of
this equipment must be done by a licensed professional
heating contractor who is qualified and experienced in the
installation, service and maintenance of hot water heating
systems. There are no user serviceable parts on this
equipment.
Note: Please carefully read this manual prior to attempting
start-up, maintenance or service. Any warranty is
null and void if these instructions are not followed.
For information regarding other Viessmann System
Technology componentry, please reference
documentation of the respective product.
Viessmann offers frequent installation and service
seminars to familiarize our partners with our
products. Please inquire.
Instructing the system user
The installer of the system is responsible to ensure the
system operator/ultimate owner is made familiar with
the functioning of the system, its activation, and its
shut-down.
Note: The following topics must be covered:
Proper system operation sequence. Explain the
equipment. Demonstrate an emergency shut-down,
what to do and what not. Explain that there is no
substitute for proper maintenance to help ensure
safe operation.
Technical literature
Literature applicable to all aspects of the Vitosol 100-F,
200-F or Vitosol 200-T:
- Technical Data Manual
- Installation Instructions
- Start-up, Service and Operating Instructions
- System Design Guidelines
Note: Leave all literature at the installation site and advise
the system operator/ultimate owner where the
literature can be found. Contact Viessmann for
additional copies.
Ensure main power supply to equipment, the heating
system, and all external controls has been deactivated.
Take precautions in all instances to avoid accidental
activation of power during service work.
Note: The completeness and functionality of field supplied
electrical controls and components must be verified
by the heating contractor. These include low
water cut-offs, flow switches (if used), staging
controls, pumps, motorized valves, air vents,
thermostats, etc.
Repair work
IMPORTANT
Repairing components which fulfil a safety function can
compromise the safe operation of your heating system.
Replace faulty components only with original Viessmann
replacement parts. Ancillary components, spare and wear
parts.
IMPORTANT
4
5546 417 - 03
Replacement and wear parts which have not been tested
together with the solar system can compromise its
function. Installing non-authorized components and
non-approved modifications/conversion can compromise
safety and may infringe our warranty conditions.
For replacement, use only original Viessmann replacement
parts or those which are approved by Viessmann.
Vitosol DHW Solar Pack Installation
General Information
About these Installation Instructions
Take note of all symbols and notations intended to draw attention to potential hazards or important product
information. These include “WARNING”, “CAUTION”, and “IMPORTANT”. See below.
WARNING
Warnings draw your attention to the presence of
potential hazards or important product information.
Indicates an imminently hazardous situation which, if
not avoided, could result in substantial product/property
damage, serious injury or loss of life.
CAUTION
Cautions draw your attention to the presence of
potential hazards or important product information.
Indicates an imminently hazardous situation which,
if not avoided, may result in product/property damage
or minor injury.
IMPORTANT

Helpful hints for installation, operation or maintenance
which pertain to the product.
This symbol indicates that additional, pertinent
information is to be found.
5546 417 - 03
This symbol indicates that other instructions must
be referenced.
5
General Information
Vitosol DHW Solar Pack Installation
Notes on Installation

The entire solar heating system should be installed
in accordance with the accepted rules of technology,
observing all relevant accident prevention regulations.

Employ suitable safety measures to prevent falls,
falling objects and roof damage due to insufficient
load bearing capacity, e.g. by means of scaffolding,
ladders, cable ties etc.

The collectors must be securely mounted so that the
mountings can withstand intense wind conditions.
CAUTION
Use only Viessmann supplied mounting clips and
mounting hardware. Never drill or screw directly into
collector side frames.

Use only stainless steel screws and bolts when
fastening mounting brackets or frames.

Although the glass collectors surfaces are hailresistant, Viessmann recommends users to include
storm coverage in their building insurance. Our
warranty does not cover storm related damage.

The collectors should be mounted level so that
complete venting is assured.

Filling the solar heating system with Viessmann heat
transfer fluid “Tyfocor-HTL" is highly recommended.
Tyfocor-HTL is supplied pre-mixed and water must
not be added.
Other heat transfer fluids may be suitable if they
have the same temperature range -31°F to 338°F
(-35°C to 170°C) and are non-toxic.

In areas with extremely cold climate conditions,
where outside temperatures may drop below -31°F
(-35°C), the use of Tyfocor-HTL is not
recommended. Use a solar propylene glycol mixture
with a higher concentration of glycol that provides
the level of freeze protection required for the area of
the collector installation.

The piping inside and outside the building should
be insulated to avoid heat loss. Use only high
temperature resistant pipe insulation.
CAUTION
Pool water or potable water should not be pumped
directly through the Vitosol collectors. Damage to
collectors caused by corrosion, freeze damage or
scaling will void warranty.
Collector Location
Please refer to the Vitosol System Design
Guidelines, for detailed information on the
optimum alignment and inclination of solar
collectors.
Optimum alignment and inclination
The solar collector provides the highest solar yield over
an annual average when facing due south with an
inclination of approximately 30º to 45º to the horizontal
plane.
However, the installation of a solar heating system
is still viable even when the installation deviates
quite significantly from the above (south-westerly to
south-easterly alignment with an inclination angle of
approximately 25º to 55º).
6
5546 417 - 03
The collectors should, as far as possible, be oriented
towards the south. Solar system performance drops
off significantly if collectors face more than 50° off
of due south.
General Information
Vitosol DHW Solar Pack Installation
Product Information CVBA
Vitocell 100-W, type CVBA
Enamelled DHW tank with internal indirect coils for DHW
heating in conjunction with solar thermal systems, as well
as floor standing and wall mounted boilers in dual mode
operation.
H DHW tank fully equipped with the following tank:
- Solar-Divicon
- DeltaSol BX solar control.
H Capacity: 66 USG (250 L)
Connections
Rear view
Front view
Legend
A DHW outlet and TPRV
B Heating water supply (boiler)
C Spare dry sensor well
D Dry sensor well for boiler control
E Heating water return (boiler)
F Cold water inlet
G Heating water supply, solar
H Heating water return, solar
K Discharge pipe for PRV
M Solar expansion tank connection
N Female thread for solar expansion tank bracket
O Solar controller, type DeltaSol BX
P Safety assembly with
- Safety valve (PRV)
- Pressure gauge
- Fill valve
- Solar expansion tank connection M
5546 417 - 03
Front view
7
General Information
Vitosol DHW Solar Pack Installation
Product Information CVSA
Vitocell 100-W, type CVSA
Enamelled DHW tank with internal indirect coil for DHW
heating in conjunction with solar thermal systems, as
well as a 4500 Watt electric heating element for auxiliary
heating.
H DHW tank fully equipped with the following tank:
- Solar-Divicon
- DeltaSol BX solar control.
H Capacity: 69 USG (260 L)
Connections
Rear view
Legend
A DHW outlet and TPRV
B Spare dry sensor well
C Cold water inlet
D Immersion heating element for electric reheating
E Heating water supply, solar
F Heating water return, solar
G Discharge pipe for PRV
H Solar expansion tank connection
I Female thread for solar expansion tank bracket
J Solar controller, type DeltaSol BX
K Safety assembly with
- Safety valve (PRV)
- Pressure gauge
- Fill valve
- Solar expansion tank connection H
8
5546 417 - 03
Front view
Vitosol DHW Solar Pack Installation
Installation
Installing on Sloped Roofs
Components
5546 417 - 03
Legend
1 Zinc-plated countersunk wood screw
0.25 x 3.1 in. (6 x 80 mm)
2 Roof bracket for shingle roofs
3 Mounting rail
4 Mounting plate
5 Clamping bracket, external
6 Clamping bracket, internal
9
Installation
Installing on Sloped Roofs
Vitosol DHW Solar Pack Installation
(continued)
Roof brackets fitted to a shingled roof.
Example:
10
5546 417 - 03
Legend
A Collector
B Lag screws
C Mounting rail
D Roof bracket
Installation
Vitosol DHW Solar Pack Installation
Installing on Sloped Roofs
(continued)
Install the panel array level to prevent air pocketing in the
collectors.
Attaching roof brackets on shingled roof
1. The roof brackets 1 should be laid out as close as
possible to the dimensions shown in the diagram on
page 12.
2. Locate the roof joist by tapping along the roof to find
it’s general location (stud finders do not work well
through shingles and roof sheathing).
3. Pry up the shingles and drill small pilot holes to locate
exact location of roof joist. If necessary, check where
pilot hole is coming through roof from inside of attic.
4. Drill pilot holes into center of joist as shown. Fill the
pilot holes and coat the bottom of roof bracket with
silicone sealant.
Drill within
0.2 in. (5 mm)
of center
Too close
to edge
5. Attach bracket to roof joist using the supplied 3.1 in.
(80 mm) stainless steel screws 2. Screws should
penetrate the roof joist at least 2½ in. (64 mm). Use
longer (field supplied) screws if required to achieve
necessary penetration.
CAUTION
The roof bracket must be securely attached to the
roof joist of the structure. Only use stainless steel
attachment screws. Do not overtighten lag bolts as
the head may weaken and shear off.
Correct
Source: CANSIA
Incorrect
CAUTION
The 3.1 in. (80 mm) screws supplied with the mounting
kit may not be sufficient length for some roof structures.
The installer must ensure screws will penetrate roof
joist sufficiently, and if not, must provide longer screws
or lag bolts.
5546 417 - 03
Source: CANSIA
11
Installation
Installation on Sloped Roofs
Vitosol DHW Solar Pack Installation
(continued)
Fitting mounting rails
Maximum deviation from dimensions x and y is 0.4 in. (10 mm)
12
5546 417 - 03
Legend
A Roof bracket
B Mounting rail
Installation
Vitosol DHW Solar Pack Installation
Installing and Connecting the Collectors
Lubricate O-ring seals only with the special valve grease
provided.
IMPORTANT
5546 417 - 03
Connection pipes should not show any signs of damage.
13
Installation
Vitosol DHW Solar Pack Installation
Installing and Connecting the Collectors (continued)
Legend
A Rating plate
14
5546 417 - 03
Legend
A Supply connection with sensor well for collector
temperature sensor
B Return connection
Installation
Vitosol DHW Solar Pack Installation
Collector Roof Layout
Side View
Front View
5546 417 - 03
IMPORTANT
Roof boot or pipe flashing kit is not part of the Vitosol
DHW Solar Package. This item must be selected and field
supplied by the installer.
15
Installation
Vitosol DHW Solar Pack Installation
Fitting the Collector Temperature Sensor
16
5546 417 - 03
The collector temperature sensor is part of the standard
delivery of the collector connection set.
Installation
Vitosol DHW Solar Pack Installation
Disassembly Information
Before installation
To prevent damage to the Solar-Divicon, thermal
insulation and the pump station, components can be
removed prior to transportation to the installation site.
IMPORTANT
Only remove the Solar-Divicon if absolutely necessary to
make transport easier.
Note: Ensure that no insulation remnants enter the DHW
tank through the tank connections.
Step 3
Disconnect sensor wire S3 from the solar control.
Step 4
Undo connections A and B
Step 5
Undo connections C and D
Step 9
Remove only the PVC tank jacket. The hard foam
insulation underneath is permanent (do not remove).
Reassemble in reverse order after the installation has been
completed.
5546 417 - 03
Legend
A Solar supply
B Solar return
C Pump station mounting stud top
D Pump station mounting stud bottom
17
Installation
Vitosol DHW Solar Pack Installation
Siting Information
Maintain the minimum clearance.
IMPORTANT
The thermal insulation must not be able to come into
contact with flames. Exercise caution when welding and
soldering.
IMPORTANT
To prevent material losses, place the DHW tank in a room
free from the risk of frost and draughts. When not in use,
the DHW tank must be drained if there is a risk of frost.
H Level the DHW tank with the adjustable feet.
Note: Never extend the adjustable feet beyond a total
length of 1.4 in. (35 mm).
18
5546 417 - 03
H Provide adequate clearance from the wall so that the
solar control can be operated.
Note: To facilitate access to the connections on the
solar side, the solar control can be moved to the
right or left.
Vitosol DHW Solar Pack Installation
Installation
Checking the Anode Connection
5546 417 - 03
Legend
A Top of anode
B Anode grounding wire
19
Installation
Vitosol DHW Solar Pack Installation
Fitting the Top Cover
20
5546 417 - 03
Legend
A Rating plate
Vitosol DHW Solar Pack Installation
Installation
Fitting the Solar Expansion Tank
5546 417 - 03
Mounting the expansion tank on the DHW tank
Using the corrugated pipe supplied, connect the solar
expansion tank to connection M of safety assembly P
(see page 7).
21
Installation
Vitosol DHW Solar Pack Installation
Fitting Tank Temperature Sensor (CVBA only)
To prevent equipment damage, cables must not come
into contact with hot parts.
Ensure adequate thermal insulation between cables
and hot pipework.
Legend
A Dry sensor well for tank temperature controller
22
H Never wrap insulating tape around the sensor.
H Secure the tank temperature 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.
H Insert the sensor retainer together with the sensor into
the dry sensor well A as far as it will go.
IMPORTANT
Temperature sensor for tank temperature control is not
part of the Solar Pack and must be field supplied.
The sensor is typically part of the boiler control system.
5546 417 - 03
IMPORTANT
Installation
Vitosol DHW Solar Pack Installation
Electric Heating Element
Heating element installation
This section applies to CVSA DHW storage tanks
equipped with an electric heating element.
Before any electrical connections are made, be sure that
the water heater is full of water and that the valve in the
cold water supply line is open. Check the rating plate and
wiring diagram before proceeding. Thermostats are factory
set and wired in accordance with the wiring diagram.
The dealer in your area ordered this water heater wired
at the factory to comply with existing area codes, but
local utility codes may require or allow other circuitry.
Consult your local power company to determine the correct
electrical hook-up in order to meet local utility and building
codes and in order to obtain the most economical rates.
Also check to find out if you are required to obtain a
permit before starting the installation. The wattage and
rated voltage are shown on the water heater data plate.
CAUTION
Screw-in heaters must be installed by an authorized
specialist. The tank must be connected durably and
reliable with the ground wire connection.
Heating element wiring
Determine voltage and wattage from the rating plate
attached to the solar water heater. All external wiring,
connection, and over current protective devices must
be provided and installed in accordance with the latest
edition of the National Electrical Code, local codes, and
local utility requirements. The solar water heater must
be electrically “grounded” by the installer. A green
ground screw has been provided on the solar water
heater’s junction box.
IMPORTANT
The water heater must be well grounded.
Connect the screw head with ground wire connection.
A green ground screw is provided at the electrical
connection point for connecting a ground wire.
The grounding electrode conductor shall be of copper,
aluminum, or copper clad aluminum. The material shall
be resistant to corrosion, and shall be of one continuous
length without a splice or joint. Rigid metal conduit,
intermediate metal conduit, or electrical metallic tubing
may be used for the grounding means if conduit or tubing
is terminated in fittings approved for grounding.
WARNING
Confirm that all electrical connections are unpowered
before installing or servicing electrical components /
connections within the water heater.
WARNING
The water heater must be electrically grounded in
accordance with local codes or, in the absence of local
codes, with NFPA 70. Failure to properly wire electrical
connections may result in serious physical harm.
Electrical power may be from more than one source.
Make sure all power is off before attempting any
electrical work.
Screw-in heaters are standard horizontal positioned.
Only a torque wrench shall be used to mount the heating
element. The torque must not exceed 59 lb.ft
(80 Nm).
5546 417 - 03
IMPORTANT
Flexible metal conduit or flexible metallic tubing shall be
permitted for grounding if all the following conditions are
met:
■ The length in any ground return path does not exceed
6 ft. (1.8 m)
■
The circuit conductors contained therein are protected
by over current devices rated at 25 amperes or less.
■
The conduit or tubing is terminated in fittings approved
for grounding.
WARNING
Never use this water heater /storage unit unless it is
completely filled with water
23
Installation
Vitosol DHW Solar Pack Installation
Connecting the Electric Heating Element
1.
Remove the center screw from the white protective
cover.
2.
Carefully remove the protective cover from the tank
jacket.
3.
Spread the tangs of the tapped mounting bracket
outwards and remove from the tank mounting tabs.
4.
Remove the clear plastic electrical protection cover
by lifting up on the arrow tab (located at the top of
cover).
5.
Install the line lock or cable strain relief in the bottom
bracket.
6.
Route the power supply line from the underside of
the bottom bracket and feed it through the field
supplied line lock or strain relief.
7.
Tighten the line lock or strain relief such that the
power supply line is secure and cannot be easy
pulled out.
8.
Connect L1 of the hot/live wires to terminal #1 of
the thermostat.
9.
Connect L2 of the hot/live wire to terminal #3 of the
thermostat.
10. Connect the ground wire to the grounding screw
located at the bottom right corner of the line lock or
cable strain relief bracket.
11. Reinstall the clear plastic electrical protection cover,
making sure that the arrow securely snaps into place
12. Reinstall the tapped mounting bracket by spreading
the tangs and placing on the tank mounting tabs.
13. Carefully slide the white protective cover onto
the tank jacket and align with the tapped hole of the
mounting bracket.
14. Install the center screw into the white protective
cover and carefully tighten until it is snug. Be very
careful to not over tighten this screw as this cover
could become damaged
WARNING
If system components are not grounded, serious injury
from electric current can result if an electrical fault
occurs.
Connect the appliance and pipework to the
equipotential bonding of the building in question.
WARNING
24
5546 417 - 03
Incorrectly executed electrical installations can lead to
injuries from electrical current and result in appliance
damage.
Installation
Vitosol DHW Solar Pack Installation
Fixed High Limit and Electric Heating Element Temperature Adjustment
Fixed High Limit
■ The high limit safety feature is factory set at
180°F5°F (82°C3°C)
DHW Temperature Adjustment
■ The factory preset DHW temperature is 120°F 5°F
(49°C3°C) at “HOT” indicator setting.
■
The DHW temperature is field adjustable between
110°F to 160°F (43°C to 71°C).
■
The factory temperature differential (non-adjustable) is
between 7°F to 17°F (4°C to 9°C).
Fixed High Limit
(Manual Reset)
Heating element temperature settings
To adjust the temperature settings:
1. Turn “off” the electrical power at the junction box
of the water heater.
WARNING
Failure to turn “OFF” electrical power to the
solar water heater will result in the possibility
of property damage, serious injury or loss of
life.
2. Carefully take off the access panel (see page 25).
3. Turn the water temperature dial clockwise to increase
the temperature, or counterclockwise to decrease the
temperature.
Thermostat Setting
Approx. DHW Temperature
°
110°F5°F (43.5°C3°C)
HOT
120°F5°F (49.0°C3°C)
A
130°F5°F (54.5°C3°C)
B
140°F5°F (60.0°C3°C)
C
150°F5°F (65.5°C3°C)
VERY HOT
160°F5°F (71.0°C3°C)
4. Carefully replace the access panel.
DHW
Temperature
Adjustment
5. Turn “on” the power supply.
IMPORTANT
Each thermostat is factory preset at “HOT” or
1205°F (493°C). This setting will reduce the risk
of scald injury. This temperature setting has proven
by experience to be the most satisfactory from the
standpoint of operation costs, household needs and the
ability to store solar generated heat.
Solar water heaters installed in Florida require the
thermostat to be set at 125°F (52°C).
CAUTION
5546 417 - 03
For your safety DO NOT attempt to repair thermostat,
heating element or electrical wiring (if applicable).
Always refer such repairs to a qualified service technician.
Approx. Water
Temperature
Time to produce 2nd and 3rd
Degree burns on adult skin
120°F (49.0°C)
more than 5 minutes
125°F (51.5°C)
1.5 to 2 minutes
130°F (54.5°C)
about 30 seconds
135°F (57.0°C)
about 10 seconds
140°F (60.0°C)
less than 5 seconds
150°F (65.5°C)
about 1.5 seconds
160°F (71.0°C)
about 0.5 seconds
170°F (76.5°C)
nearly instantaneous
25
Installation
Vitosol DHW Solar Pack Installation
Connecting the Solar Control Unit - DeltaSol BX
The following cables are already connected to the solar
control:
H Power supply for the solar controller (14 ft, 120VAC,
3 wire with grounding plug).
H Upper and lower tank temperature sensors S2 and S3
H Glycol pump electrical connection cable
Note: If not connected, push the plug for the pump
connection cable into the circulation pump.
The following cables have to be field connected to the
solar control:
H Collector temperature sensor S1 (see page 16)
IMPORTANT
Do not route high voltage (120V) cables adjacent to low
voltage (< 42V) cables. This may lead to communication
errors. Route high voltage and low voltage cables separately.
26
5546 417 - 03
Viessmann DeltaSol BX installation and service
instructions
Installation
Vitosol DHW Solar Pack Installation
Making the Connections on the Heating Water and Solar Sides CVBA
H Connect all pipework to the Solar-Divicon with
detachable fittings.
H Seal connections that are not required with red brass
caps.
H Adjust the solar controller so that the DHW temperature
in the DHW tank does not exceed 180°F (82°C).
Note: Vitosol collectors may be operated with up to
87 psig (6 bar).
System schematic with solar collectors and boiler
H Heating of DHW by solar collectors via the lower
internal indirect coil
H Heat supply for reheating or heating DHW with a boiler
via the upper internal indirect coil
IMPORTANT
DHW recirculation line cannot be installed on the
Vitosol DHW Solar Pack in a single tank configuration.
5546 417 - 03
This solar tank is not provided with a recirculation
tapping. If DHW recirculation is required, then you must
use a two-tank system configuration.
Legend
DCW Domestic cold water inlet
DHW Domestic hot water outlet
S1 Collector temperature sensor
S2 Tank temperature sensor (solar side)
1 Solar collector
2 Vitocell 100-W comprising:
3 DHW tank
4 Solar-Divicon
5 Solar control
6 Fill valve
7 Heating boiler
8 Heating circuit
9 Boiler DHW temperature sensor
qP Anti scald tempering valve (supplied by others)
Permissible temperature
Solar side
230°F (110°C)
Heating water side
230°F (110°C)
Permissible operating pressure
Solar side
87 psig (6 bar)
Heating water side
147 psig (10 bar)
Test pressure
Solar side
235 psig (16 bar)
Heating water side
235 psig (16 bar)
27
Installation
Vitosol DHW Solar Pack Installation
Making the Connections on the Heating Water and Solar Sides CVSA
H Connect all pipework to the Solar-Divicon with
detachable fittings.
System schematic with solar collectors and standard
H Seal connections that are not required with red brass
caps.
H Heating of DHW by solar collectors via the lower
internal indirect coil
H Adjust the solar controller so that the DHW temperature
in the DHW tank does not exceed 150°F (65°C).
Note: Vitosol collectors may be operated with up to
87 psig (6 bar).
H Heat supply for reheating or heating DHW via the
electric element
water heater or instantaneous unit.
IMPORTANT
DHW recirculation line cannot be installed on the
Vitosol DHW Solar Pack in a single tank configuration.
This solar tank is not provided with a recirculation
tapping. If DHW recirculation is required, then you must
use a two-tank system configuration.
28
Permissible temperature
Solar side
230°F (110°C)
Heating water side
230°F (110°C)
Permissible operating pressure
Solar side
87 psig (6 bar)
Heating water side
147 psig (10 bar)
Test pressure
Solar side
235 psig (16 bar)
Heating water side
235 psig (16 bar)
5546 417 - 03
Legend
DCW Domestic cold water inlet
DHW Domestic hot water outlet
S1 Collector temperature sensor
S2 Tank temperature sensor (solar side)
1 Solar collector
2 Vitocell 100-W comprising:
3 DHW tank
4 Solar-Divicon
5 Solar control
6 Electric heating element
7 Fill valve
8 Standard hot water heater or instantaneous unit
9 Anti scald tempering valve (supplied by others)
Installation
Vitosol DHW Solar Pack Installation
Making the Connections to the Solar Piping
1. Install the Solar Divicon unit (if required).
2. Check connections A and B for leaks and retighten
if required. Torque: 33 to 37 lb.ft (45 to 50 Nm)
3. When using copper pipes:
Insert support sleeves C inside c in. x 4 in. long
copper adaptors D. Torque for both union nuts:
22 lb.ft (30 Nm)
4. When using Viessmann flexible insulated b in.
stainless steel piping:
Connect the stainless steel piping as shown E directly
to the Solar-Divicon using the locking clip, O-rings,
gasket and lubricant supplied with the piping kit.
IMPORTANT
Use 4 in. copper adaptors that are supplied with the Solar
Pack (to adapt from 22 mm to c in.).
5. Install the supply line with a rise and install an air vent
valve at the highest point.
6. Only for heating water supply temperature in excess
of 230°F (110°C):
Install a type-tested high limit safety cut-out, if
none has been installed in the system. For this, use
a temperature limiter and a high limit safety cut-out.
5546 417 - 03
CAUTION
Once stainless steel piping is installed, pull lineset
upwards to check for tightness. If loose, tighten.
29
Installation
Vitosol DHW Solar Pack Installation
Connections on the DHW Side
203°F (95°C)
Permissible operating pressure:
147 psig (10 bar)
Test pressure:
235.2 psig (16 bar)
Note: - Connect all pipe work with detachable fittings.
- Seal connections that are not required with red
brass caps.
- Insulate domestic hot water supply piping.
Legend
A
Discharge pipe
B
Anti-scald tempering valve (field supplied)
SV
Shut-off valve
FV
Flow check valve
PR
Pressure reducing valve
D
Drain
DCW Cold water supply lines
PGC Pressure gage connection
E
Precharged expansion tank (required where
backflow preventer is installed; check local
plumbing codes and requirements)
BP1 Backflow preventer
BP2 Backflow preventer
T&P Temperature and pressure relief valve
DW Water filter
DHW Domestic hot water supply
30
H For the DHW connection, observe all local plumbing
code requirements.
H Connect all pipework with detachable fittings.
H Seal connections that are not required with red brass
caps.
IMPORTANT
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.
WARNING
Due to the potentially high DHW temperatures generated
by the solar heating system, the domestic hot water
temperature must be limited to a maximum of 140ºF (60ºC)
by installing a anti-scald tempering valve. The tempering
valve does not completely eliminate the risk of scalding at
the tap. The installation of a mixing tap is recommended.
5546 417 - 03
Permissible temperature
Installation
Vitosol DHW Solar Pack Installation
Connections on the DHW Side
(continued)
Always ensure the use of type approved devices.
Safety devices include the following components:
- 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.
- 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 (10.3 bar).
Maximum operating pressure is 150 psig (10.3 bar).
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.
Watts Model 40XL-8
ASME pressure
steam rating
- The discharge line must be as short as possible and
pitch downward from the T&P valve and terminate plain.
WARNING
The discharge line for the T&P valve must be oriented to
prevent scalding of attendants.
- 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.
WARNING
The valve test lever must be operated at least once per
year by the owner 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.
1438 MBH
205 MBH
Relief temperature
210°F (99°C)
Outlet thread
- 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.
150 psig (10.3 bar)
CSA temperature
steam rating
Inlet thread
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.
c” male
c” female
Commissioning
5546 417 - 03
Refer to Vitosol DHW Solar Pack Operating
and Service Instructions.
31
5546 417 - 03
Technical information subject to change without notice.
Printed on environmentally friendly
(recycled and recyclable) paper.
Vitosol DHW Solar Pack Installation
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