Viessmann VITOCAL 350-A Quick guide

Installation and service
instructions
for contractors
VIESMANN
Vitocal 350-A
Type AWH-I, AWH-O
Air/water heat pump with electric drive, 400 V~
For applicability, see the last page
VITOCAL 350-A
5414 828 GB 9/2009 Please keep safe.

2
Please follow these safety instructions closely to prevent accidents and mate-
rial losses.
Safety instructions explained
Danger
This symbol warns against the
risk of injury.
!Please note
This symbol warns against the
risk of material losses and envi-
ronmental pollution.
Note
Details identified by the word "Note" con-
tain additional information.
Target group
These instructions are exclusively
designed for qualified personnel.
■ Work on electrical equipment must
only be carried out by a qualified elec-
trician.
■ The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations
Observe the following when working on
this system
■ all legal instructions regarding the pre-
vention of accidents,
■ all legal instructions regarding envi-
ronmental protection,
■ the Code of Practice of relevant trade
associations.
■ all current safety regulations as
defined by DIN, EN, DVGW, VDE and
all locally applicable standards
Working on the system
■ Isolate the system from the power sup-
ply and check that it is no longer 'live',
e.g. by removing a separate fuse or by
means of a main isolator.
■ Safeguard the system against unau-
thorised reconnection.
!Please note
Electronic modules can be dam-
aged by electrostatic dis-
charges.
Touch earthed objects, such as
heating or water pipes, to dis-
charge static loads.
Repair work
!Please note
Repairing components that fulfil a
safety function can compromise
the safe operation of your heating
system.
Replace faulty components only
with original Viessmann spare
parts.
Safety instructions
Safety instructions
5414 828 GB

3
Ancillary components, spare and
wearing parts
!Please note
Spare and wearing parts that
have not been tested together
with the heating system can com-
promise its function. Installing
non-authorised components and
non-approved modifications or
conversions can compromise
safety and may invalidate our
warranty.
For replacements, use only orig-
inal spare parts supplied or
approved by Viessmann.
Safety instructions
Safety instructions (cont.)
5414 828 GB

4
Installation instructions
Preparing for installation
Product information.............................................................................................. 8
General information - electrical connection.......................................................... 8
Internal heat pump, type AWH-I........................................................................... 8
External heat pump type AWH-O......................................................................... 17
Overview of possible system schemes................................................................ 30
Function description for the system examples..................................................... 30
System example 1................................................................................................ 34
System example 2................................................................................................ 39
DHW heating........................................................................................................ 47
Installation sequence
Removing the transport brackets......................................................................... 52
Fitting the outer panels......................................................................................... 52
Fitting the silencer hoods (only type AWH-O)...................................................... 60
Installing the heat pump....................................................................................... 61
Connecting the heating circuits and condensate drain........................................ 64
Electrical connections in the control panel........................................................... 68
Electrical connections in the heat pump control unit............................................ 75
Power supply........................................................................................................ 104
Closing the heat pump......................................................................................... 114
Service instructions
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance.......................................... 116
Further details regarding the individual steps....................................................... 117
Troubleshooting
Control unit diagnostics........................................................................................ 131
Measures in case the room temperature is constantly too low............................ 163
No programming unit display................................................................................ 164
Repairs................................................................................................................. 165
Control settings
Menu structure overview...................................................................................... 168
Control settings by the contractor......................................................................... 168
System definition control settings
System scheme.................................................................................................... 169
Language............................................................................................................. 169
Temperature differential for the heating limit........................................................ 169
Index
Index
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5
Swimming pool..................................................................................................... 170
Cascade............................................................................................................... 170
Number of lag heat pumps................................................................................... 171
Output of lag heat pumps..................................................................................... 172
External extension................................................................................................ 172
External operating mode changeover heating circuits......................................... 173
Operating mode for external operating mode changeover................................... 174
External operating mode changeover duration.................................................... 174
External demand/mixer "OPEN"........................................................................... 175
External blocking/mixer "CLOSED"...................................................................... 176
Pumps and compressor, external blocking.......................................................... 177
Vitosolic................................................................................................................ 178
Vitocom 100......................................................................................................... 178
Auxiliary output with switching times.................................................................... 179
Compressor control settings
Enabling the compressor...................................................................................... 180
Heat pump output................................................................................................. 180
Defrost stop temperature...................................................................................... 181
Control settings, external heat source
Enable external heat source................................................................................. 182
Priority of external heat sources........................................................................... 182
Dual-mode temperature....................................................................................... 182
External heat source for DHW.............................................................................. 183
DHW control settings
Set cylinder temperature...................................................................................... 184
DHW switching times........................................................................................... 184
Minimum temperature for DHW cylinder.............................................................. 184
Maximum temperature for DHW cylinder............................................................. 184
Hysteresis/Hysteresis booster heater................................................................... 185
DHW start optimisation......................................................................................... 186
DHW stop optimisation......................................................................................... 186
DHW auxiliary function......................................................................................... 186
Set DHW temperature 2....................................................................................... 186
Temperature sensor 2.......................................................................................... 186
Parameters for DHW reheating............................................................................ 187
Control settings, electric heater
Instantaneous heating water heater (accessory)................................................. 189
Maximum stage, electric booster heater.............................................................. 189
Stage at power-OFF............................................................................................. 190
Index
Index
5414 828 GB

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Control settings, hydraulics
Heat pump for drying buildings............................................................................. 191
Screed programme............................................................................................... 191
Set flow temperature in case of external demand................................................ 193
Operation with three-way diverter valve............................................................... 194
Control settings, heating water buffer cylinder
Heating water buffer cylinder................................................................................ 195
Switching times, heating water buffer cylinder..................................................... 195
Set temperature for fixed value (switching times)................................................ 195
Hysteresis............................................................................................................. 195
Maximum temperature......................................................................................... 196
Control settings, heating circuits
Room temperatures and switching times............................................................. 197
Enabling the remote control................................................................................. 197
Heating curve slope/level..................................................................................... 197
Influence of room temperature hook-up............................................................... 197
Room temperature hook-up (heating circuits)...................................................... 198
Maximum set flow temperature............................................................................ 198
Control settings - communication
LON communication module................................................................................ 200
LON system number / LON subscriber number................................................... 200
Fault manager...................................................................................................... 201
Time via LON....................................................................................................... 201
Outside temperature via LON............................................................................... 202
Data receive interval............................................................................................. 202
Heat pump numbers in a cascade........................................................................ 203
Date/time control settings
Date and time....................................................................................................... 204
Automatic summer/wintertime changeover.......................................................... 204
Connection and wiring diagrams
Overview of the PCBs and connection options.................................................... 205
Safety chain, control circuit, main power circuit................................................... 213
Parts lists
Parts list, type AWH-I........................................................................................... 224
Parts list, type AWH-O......................................................................................... 232
Index
Index
5414 828 GB

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Commissioning/service reports
Hydraulic parameters report................................................................................. 241
Control parameters report.................................................................................... 241
Specification....................................................................................................... 245
Appendix
Heat pump commissioning order.......................................................................... 249
Certificates
Declaration of conformity...................................................................................... 250
Keyword index.................................................................................................... 251
Index
Index (cont.)
5414 828 GB

8
Vitocal 350-A, type AWH-I, AWH-O
Air/water heat pump without integral circulation pump (secondary pump) and without
three-way diverter valve. A secondary pump assembly (secondary pump and circu-
lation pump for cylinder heating) is available as an accessory.
The four red cores in the heat pump control unit must be removed for the external
circulation pumps to be connected (see page 82).
General information - electrical connection
■ The total output of all components con-
nected directly to the heat pump con-
trol unit (e.g. pumps, valves, message
facilities, contactors) must not exceed
1000 W.
If the total output ≤ 1000 W, the indi-
vidual rating of a component (e.g.
pump, valve, message facility, contac-
tor) can be greater than specified (see
page 245).
■ If two components are connected to
the same terminal, press both cores
together into a single wire ferrule.
■ If the compressor and/or instantane-
ous heating water heater (accessory)
are operated at a lower tariff (power-
OFF), provide an additional cable for
the power-OFF signal (e.g. NYM 3 x
1.5 mm2) from the distribution board
(meter box) to the heat pump control
unit (see page 105).
■ The number of power cables from the
distribution board (meter box) to the
heat pump control unit and to the con-
trol panel depends on the system ver-
sion and tariffs used (see from
page 104).
■ The cores of the KM BUS cable are
interchangeable.
For further information, see control panel
(page 70), heat pump control unit
(page 75) and power supply
(page 104).
Internal heat pump, type AWH-I
!Please note
Avoid damaging the appliance
during handling.
Never put weight on the top, front
or side panels of the appliance.
!Please note
Installing a compressor at a steep
angle inside the heat pump can
result in equipment damage.
Preparing for installation
Product information
5414 828 GB

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Never tilt the heat pump more
than 45° during handling and
installation.
Requirements of the installation room
!Please note
Incorrect ambient conditions can
lead to system damage and can
put the safe operation at risk.
■ The installation room must be
dry and free from the risk of
frost.
Ensure ambient temperatures
above 0 ºC and below 35 ºC.
■ Prevent air contamination by
halogenated hydrocarbons
(e.g. as contained in paints,
solvents or cleaning fluids) and
excessive dust (e.g. through
grinding/polishing work).
■ Avoid continuously high humid-
ity levels (e.g. through frequent
drying of washing).
!Please note
Overloading the floor can result in
building damage.
Observe the permissible floor
load.
■ Total weight:
AWH-I 110 287 kg
AWH-I 114 297 kg
AWH-I 120 361 kg
■ To prevent structure-borne noise,
never set up the appliance on ceilings
with wooden joists (e.g. in the attic).
■ Observe minimum clearances.
■ Level the appliance.
■ Required room height at least 2.10 m.
■ Observe min. room volume required:
AWH-I 110 13.55 m3
AWH-I 114 16.13 m3
AWH-I 120 17.10 m3
Preparing for installation
Internal heat pump, type AWH-I (cont.)
5414 828 GB
Installation

10
Installation
Min. clearances and dimensions for installation against the wall
g
≥ 2800 (8 x 350)
≤ 4200 (12 x 350)
885
885
≥ 3000
830
990
686
80
350
810
h
965
Discharge side on the left (delivered condition); hydraulic connections on the right
(on site)
AWall outlet/duct part made of EPP
(expanded polypropylene)
BWeather grilles
CConnection on the inlet side made of
EPP (air inlet)
DHeat pump
EConnection on the discharge side
made of EPP (air discharge)
F90° bend made of EPP
Preparing for installation
Internal heat pump, type AWH-I (cont.)
5414 828 GB