Buderus Logamatic 4323 Operating instructions

Installation and Service
Instructions
Control Panel
Logamatic 4323
6 720 618 588 - 11/2008 US/CA
For heating contractors
Read carefully prior to
commissioning and service
work

Contents
Logamatic 4323 - Technical specifications are subject to change without prior notice.2
1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Standards, regulations and directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Please observe these notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.6 Important instructions for commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.7 Cleaning the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.8 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Product description and scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Scope of delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Setting parameters and display data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Controls and MEC2 remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Control panel controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 MEC2 remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Modules and their functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1 CM431 controller module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 NM482 power module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.3 ZM433 central module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.4 FM441 function module (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.5 FM442 function module (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6 Commissioning the MEC2 remote control . . . . . . . . . . . . . . . . . . . . . . . . 21
7 Calling up the service level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Calling up and modifying settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9 General data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.1 Minimum outdoor temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.2 Building type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9.3 Summer/winter time changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
9.4 Remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
9.5 Manual switch fault message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9.6 Automatic service call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
9.7 0 – 10 V input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9.8 Temperature control 0 – 10 V input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10 Module selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11 Heating zone data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
11.1 Heating system selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
11.2 Renaming heating zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Contents
Logamatic 4323 - Technical specifications are subject to change without prior notice. 3
11.3 Adjusting base point temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
11.4 Setting design temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
11.5 Minimum supply temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
11.6 Maximum supply temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
11.7 Selecting remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11.8 Maximum room effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
11.9 Selecting setback type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
11.10 Setting outdoor setback temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
11.11 Vacation setback type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
11.12 Stopping setback at low outdoor temperatures . . . . . . . . . . . . . . . . . . . . . . . . 53
11.13 Setting supply setback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
11.14 Room temperature offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
11.15 Automatic adaptation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
11.16 Setting switch optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
11.17 Setting switch-off optimization time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.18 Setting frost protection temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
11.19 Setting DHW priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11.20 Input heating zone actuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
11.21 Entering actuator run time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
11.22 Boiler temperature increase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
11.23 External changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
11.24 External pump fault message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
11.25 Drying slab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
12 DHW data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
12.1 Selecting the DHW storage tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
12.2 Set temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
12.3 Selecting switching optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
12.4 Selecting residual heat use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
12.5 Setting differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
12.6 Increasing boiler temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
12.7 External fault message (WF1/2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
12.8 External contact (WF1/3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
12.9 Selecting and setting thermal disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
12.10 Setting disinfection temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
12.11 Setting day of week for disinfection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
12.12 Setting time of day for disinfection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
12.13 Daily heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
12.14 Selecting the recirculation pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
12.15 Setting the recirculation pump intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Contents
Logamatic 4323 - Technical specifications are subject to change without prior notice.4
13 Substations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
13.1 Setting the minimum warm up temperature . . . . . . . . . . . . . . . . . . . . . . . . . 92
13.2 Setting the maximum warm up time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
13.3 Setting boiler raising. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
14 Characteristic heating curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
15 Running relay test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
16 Multi-boiler systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
17 Carrying out an LCD test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
18 Fault log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
19 Fault. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
20 Monitor data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
20.1 Heating zone monitor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
20.2 DHW monitor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
20.3 Substation monitor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
21 Display version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
22 Selecting the control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
23 Reset to the factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
23.1 Resetting all control panel parameter settings . . . . . . . . . . . . . . . . . . . . . . . . 113
23.2 Resetting the fault log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
23.3 Resetting the service call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
24 Sensor characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
25 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

Safety 1
Logamatic 4323 - Technical specifications are subject to change without prior notice. 5
1 Safety
1.1 About this manual
This manual contains important information regarding
the safe and appropriate commissioning and servicing of
the Logamatic 4323 control panel.
This manual is intended for heating contractors who,
due to their training and experience, are knowledgeable
in handling heating systems and domestic hot water
installations. Only carry out service measures yourself if
you have this technical expertise.
Explain to the customer the function and operation of the
appliance.
1.2 Intended use
The Logamatic 4323 control panel is designed
exclusively to control heating systems in apartment
buildings, residential complexes, and other types of
buildings.
1.3 Standards, regulations and directives
1.4 Key to symbols
Two levels of danger are identified and signified by the
following terms:
1.5 Please observe these notes
zOnly use the control panel for the purposes for which
it is intended and only use if it is in perfect working
order.
zRead the service manual carefully before starting
work on the control panel.
USER NOTE
Observe all regulations and standards
applicable to installation and operation of
the system in your country.
USER NOTE
All electrical components must be
approved in the USA and Canada!
This product has been tested and certified
and meets applicable standards for the US
and Canadian markets.
WARNING!
RISK OF LIFE
Identifies possible dangers emanating
from a product that might cause serious
injury or death if appropriate care is not
taken.
CAUTION!
RISK OF INJURY/
SYSTEM DAMAGE
Indicates a potentially dangerous situation
that could cause minor or moderately
serious injuries or damage to property.
USER NOTE
Tip for optimum use of equipment and
adjustment as well as useful information.
WARNING!
RISK OF FATAL INJURY
due to electric shock!
zMake sure that all electrical work is
carried out by a trained contractor.
zBefore opening the control panel:
Isolate all poles of the power supply
and secure against accidental
reconnection.
WARNING!
RISK OF SCALDING
from hot water.
Risk of scalding from domestic hot water
temperatures over 122 °F (50 °C) and
during thermal disinfection.
zInstall a thermostatic tempering valve
to control the DHW temperature.

Safety
1
Logamatic 4323 - Technical specifications are subject to change without prior notice.
6
1.6 Important instructions for
commissioning
zBefore switching the control panel on, check that its
manual switches and those on the function modules
are set to "AUT".
zThe control panel operating instructions contain a
setup report for the use by the system operator.
Record the settings made during initial setup and the
layout of the heating zones in the setup log.
1.7 Cleaning the control panel
zClean the control panel with a damp cloth only.
1.8 Disposal
zDispose of the control panel packaging in an
environmentally-responsible manner.
zElectronic components do not belong in household
waste. Dispose of a defunct control panel in an
environmentally-responsible manner through an
approved organization.
When disposing of the control panel, remove the
lithium battery from the CM431 module inside the
control panel and dispose of it separately.
CAUTION!
RISK OF INJURY/
SYSTEM DAMAGE
due to operator error!
Operator errors can cause injury and
damage to property.
zMake sure that children never operate
the appliance unsupervised or play
with it.
zMake sure that only personnel trained
to operate the appliance correctly have
access to it.
CAUTION!
SYSTEM DAMAGE
from frost.
The heating system can freeze up in cold
weather if it is switched off.
zProtect your heating system against
frost damage by draining it and the
DHW piping at the lowest possible
point.
USER NOTE
Ensure that a circuit breaker is available to
disconnect all poles from the mains power
supply. If there is no circuit breaker, you
will need to install one.
USER NOTE
Make sure that the heating system is
protected with an adequately-rated circuit
breaker.
USER NOTE
Only use original Buderus spare parts.
Damage as a result of the use of spare
parts not supplied by Buderus are
excluded from the Buderus warranty.
USER NOTE
Ensure that radiant floor heating zones are
equipped with a temperature operating
limit.

Product description and scope of delivery 2
Logamatic 4323 - Technical specifications are subject to change without prior notice. 7
2 Product description and scope of delivery
2.1 Product description
The digital Logamatic 4323 control panel can be used as
a stand-alone heating zone controller managing the heat
generated by a manually or indirectly-fired buffer tank, or
as a substation, for the demand-dependent control of a
supply pump.
The heating zone control function is part of the standard
equipment level (one heating zone with actuator).
It may be extended with four function modules to match
the requirements of a specific heating system.
For function extension, a combination with other digital
control panels (e.g. Logamatic 4322) in an ECOCAN-
BUS connection is also feasible. In such cases, the
Logamatic 4323 (as a stand-alone heating zone
controller) acts as a master control panel that monitors
the manually or indirectly-fired heating of a buffer tank
and makes the stored heating energy available to
connected consumers.
As the substation in an ECOCAN-BUS connection, the
Logamatic 4323 control panel can communicate with a
master boiler control panel that is part of a
Logamatic 4000 control system.
2.2 Scope of delivery
–Digital Logamatic 4323 control panel with
–CM431 controllermodule
–ZM433 central module
–MEC2 remote control or boiler display and safety
components
–Outdoor temperature sensor FA
–Supply temperature sensor FZB

Setting parameters and display data
3
Logamatic 4323 - Technical specifications are subject to change without prior notice.8
3 Setting parameters and display data
Some options are only displayed subject to the modules
that have been installed and the adjustments made
earlier.
General Data DHW LCD test
Error
Minimum outdoor temperature DHW yes/no
DHW range to Monitor
Building type
Remote control Switch optimization Heating zone 0
Manual switch fault message Leftover heat utilization Heating zone 1
Automatic service call Differential Heating zone 2
0 – 10 V input Stop differential Heating zone 3
Temperature guide 0 V corresponds to … Start differential Heating zone 4
Temperature guide 10 V corresponds to … DHW yes/no Heating zone 5
Boiler temperature increase Heating zone 6
Module selection External fault message WF1/WF2 Heating zone 7
External contact WF1/WF3 Heating zone 8
Slot A Thermal disinfection DHW
Slot 1 Temperature disinfection Sub station
Slot 2 Disinfection day of week Version
Slot 3 Time of disinfection Control panel
Slot 4 Daily heating reset
Heating zone 0 Recirculation (switch-on frequency per hour)
Settings for control panel
Heating system Sub station Fault log
Name of the heating zone Service call
Base point temperature Minimum heat-up temp.
Design temperature Maximum heat-up time
Minimum supply temperature Boiler temperature increase
Maximum supply temperature Special parameters
Remote control Heating curves
Maximum room flow
Setback type Heating zone 0
Outdoor setback from Heating zone 1
Vacation setback type Heating zone 2
No setback below … Heating zone 3
Supply setback Heating zone 4
Room temperature offset Heating zone 5
Automatic adaptation Heating zone 6
Switch optimization Heating zone 7
Shut-down optimization Heating zone 8
Freezeprotect at Relay test
DHW priority
Actuator Heating zone 0
Actuator run time Heating zone 1
Boiler temperature rise Heating zone 2
External day/night/aut Heating zone 3
External pump fault message Heating zone 4
Drying slab Heating zone 5
Drying slab temperature rise Heating zone 6
Drying slab warm-up time Heating zone 7
Maximum drying slab temperature Heating zone 8
Maximum drying slab time DHW
Drying slab reduction temperature Sub station
Drying slab reduction time
Heating zone 1, 2, 3 etc. see heating zone 0
Fig. 1 Setting parameters and display data

Controls and MEC2 remote control 4
Logamatic 4323 - Technical specifications are subject to change without prior notice. 9
4 Controls and MEC2 remote control
4.1 Control panel controls
Fig. 2 Control panel interface (standard delivery)
1On/Off switch
2Connector for external service equipment
3L1, L2 fuses
Fig. 3 Modules installed
1Slot 1: e.g. FM442 – heating zone 1, heating zone 2
2Slot 2: e.g. FM442 – heating zone 3, heating zone 4
ASlot A: ZM433 – supply for external heat sources, heating zone 0
BSlot B: MEC2 (CM431) – MEC2 remote control
3Slot 3: e.g. FM442 – heating zone 5, heating zone 6
4Slot 4: e.g. FM441 – heating zone 7, DHW/DHW recirculation pump or heating zone 7, heating zone 8
(with module FM442 in slot 4)

Controls and MEC2 remote control
4
Logamatic 4323 - Technical specifications are subject to change without prior notice.10
4.2 MEC2 remote control
Fig. 4 MEC2 remote control
1Display
2Dial
3Continuous heating mode (day)
4Automatic heating mode by timer
5Constant setback mode (night)
6Set the day
7Set vacation days
8Select standard display
9Display for set nominal room temperature
10 Input DHW temperature/heating
11 Set the time
12 Change temperature values
13 Set warm weather shutdown temperature
14 Back to standard display
15 Select a timer program
16 Select heating zones/DHW zone