Vaillant MultiMatic 700/2 Installation guide

Weather compensator multiMATIC 700/2

Table of contents
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Table of contents
1Marketing......................................................................................................1
2System overview..........................................................................................2
2.1 Controller .......................................................................................................2
2.2 Controller classification in accordance with ErP ............................................2
2.3 Optional accessories......................................................................................3
2.4 Scope of delivery ...........................................................................................4
3Planning and dimensioning........................................................................5
3.1 Planning requirements...................................................................................5
3.1.1 Installation locations.......................................................................................5
3.2 System examples...........................................................................................6
3.2.1 Planning information ......................................................................................6
3.2.2 Preliminary note to the following system diagrams........................................6
3.2.3 Key for system diagrams and connection diagrams ......................................7
3.3 System diagrams and connection diagrams..................................................9
4Application technology .............................................................................39
4.1 Appliance properties ....................................................................................39
4.2 Using the controller......................................................................................40
4.3 Displays/indicators.......................................................................................41
4.3.1 Menu display................................................................................................41
4.4 Controller settings........................................................................................42
4.4.1 Operating level 1 (basic user)......................................................................42
4.4.2 Basic controller configuration (level 2).........................................................48
4.5 Higher-level control functions.......................................................................59
4.5.1 Automatic configuration ...............................................................................59
4.5.2 Sensors........................................................................................................60
4.5.3 DCF signal...................................................................................................60
4.5.4 Energy manager ..........................................................................................60
4.5.5 Chimney sweep mode .................................................................................60
4.5.6 Pump blocking protection.............................................................................61
4.5.7 Installer level (level 3) ..................................................................................61
4.5.8 Summary of level structure ..........................................................................80
5Installation, start-up...................................................................................85
5.1 Installation....................................................................................................85
5.1.1 Installing the controller in the unit electronics box .......................................85
5.1.2 Wall-mounting the controller ........................................................................86
5.1.3 Installing and connecting the VR 70 module................................................87

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5.1.4 Installing and connecting the VR 71 module................................................89
5.2 Start-up........................................................................................................91
5.2.1 Settings in the Installation assistant.............................................................91
5.2.2 Settings matrix: System diagram and configuration for the VR 70, VR 71...92
5.2.3 Settings and displays/indicators on the VR 91.............................................93
6Maintenance/troubleshooting...................................................................97
6.1 Maintenance messages...............................................................................97
6.2 Fault messages............................................................................................98
6.3 Sensor values............................................................................................100
6.4 Additional troubleshooting information.......................................................101
6.4.1 Power supply for the VR 70, VR 71 ...........................................................101
6.4.2 Checking the eBUS power supply .............................................................101
6.4.3 Faulty eBUS communication......................................................................101
6.4.4 No display, VRC 700 (built into the electronics box) not working...............101
6.4.5 Blank display (controller in living room) .....................................................101
7Appendix...................................................................................................102
7.1 Knowledge check.......................................................................................102
7.2 Checklist ....................................................................................................104
7.3 Energy-saving tips .....................................................................................105

multiMATIC 700/2
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1 Marketing
Please refer to the corresponding marketing presentation for marketing notes and ben-
efits.

multiMATIC 700/2
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2 System overview
2.1 Controller
multiMATIC 700/2
The multiMATIC 700/2 is a weather compensator that controls heating, cooling, venti-
lation and hot water generation. The eBUS controller is designed for use with products
that are equipped with eBUS electronics.
2.2 Controller classification in accordance with ErP
star
Bonus
Type
Product
I
1.0%
Mechanical "On/Off" room temperature controller
VRT 15
II
2.0%
Modulating weather-controlled control system
VRS 620, VRC 630, VRC 450(f),
VRC 470(f), VRC 700, VRC 700/2
III
1.5%
Weather-controlled "On/Off" control system
Not a Vaillant product
IV
2.0%
Electronic "On/Off" room temperature controller
VRT 35(f), VRT 250(f)
V
3.0%
Modulating room temperature controller
VRT 50, VRT 350(f),
VRT 370(f)
VI
4.0%
Modulating room temperature controller
with room temp. mod.
VRS 620, VRC 630, VRC 450(f),
VRC 470(f), VRC 700, eRELAX/
vSMART, VRC 700/2
VII
3.5%
Weather-controlled "On/Off" control system
with room temp. mod.
Not a Vaillant product
VIII
5.0%
≥ 3 modulating room temperature controllers
with room temp. mod.
VRS 620 + VR 60 + 2x VR 90 or
VRC 630 + 2x VR 90 or
VRC 700/2 + VR 71 + 2x VR 91
* Installation in the living area
Auto
13.5 °C
11:54
23.0 °C
Desired heating temp. 23.0 °C
Menu
Op. mode

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2.3 Optional accessories
VR 70 –mixer and solar module
-Can be used with the multiMATIC 700/2
-Expansion to incorporate up to two regulated heating
circuits
-Expansion to incorporate a solar controller for heating
and domestic hot water
-Basic buffer cylinder management and allSTOR buffer
cylinder management
-Connections for actuators and sensors
VR 71 –Mixer module
-Can be used with the multiMATIC 700/2
-Expansion to incorporate up to three regulated heating
circuits
-Basic buffer cylinder management
-Hot water generation by means of a domestic hot water
cylinder
-Connections for actuators and sensors
VR 91 –Remote control
-Can be used with the multiMATIC 700/2
-Remote control with room temperature control
-Setting the target room temperature
-Measuring room air humidity when the cooling function is
activated
VR 40 –multi-functional module 2 of 7
for connecting:
-Circulation pump for hot water generation
-External heating pump
-Fault/operational warning
The controller is not backward compatible. This means that other eBUS acces-
sories cannot be combined with the multiMATIC 700/2.

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Possible combinations of controllers and controller accessories
Controller
VR 70
VR 71
1 x VR 91
2 x VR 91
VRC 700




VRC 700/2








= Combination possible
= Combination possible, but makes no sense
= Combination not possible
2.4 Scope of delivery
The following items are contained in the scope of delivery of the multiMATIC 700/2:
1 pc
multiMATIC 700/2
1 pc
VRC 9535 (DCF) or VRC 693 external sensor
1 pc
Installation accessories (screws and rawl plugs)
1 pc
6-pole edge connector for connection of AF with heat generator for plug location X41
1 pc
Three-pin header for horizontal plug connection in old unit electronics boxes
1 pc
Operating and Installation Manual

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3 Planning and dimensioning
3.1 Planning requirements
3.1.1 Installation locations
●Hanging on an interior wall in the living area.
●Alternative: Installation in the boiler's electronics box
Hanging the controller on the wall: The controller should be installed in a place
where it can accurately detect the room temperature; for example on an internal wall in
the reference room, approximately 1.5 m from the ground. When hanging the controller
on a wall,
connect it to the boiler using a 2-core eBUS line.
External sensor
The external sensor should be installed in a location with the following characteristics:
●Not fully sheltered from the wind
●Not particularly draughty
●Not in direct sunlight
●Not affected by heat sources
●On a north or north-west facing façade
When fitting the external sensor on
●buildings with up to three floors, it should be located two-thirds of the way up the
façade.
●On buildings with more than three floors, it should be fitted between the second
and third floor.

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3.2 System examples
3.2.1 Planning information
Inside the unit:
Return temperature control with underfloor heating: In single-circuit installations
that do not have a low loss header in the boiler's DIA system and are designed to
provide underfloor heating, the control type can be changed from flow to return
temperature control.
In installations that have a low loss header and a VRC 700/2 control system,
the required VR 10 external flow temperature sensor is connected to the ProE X41
plug of the unit's electronic circuitry (terminals 0 and RF) or to the VR 70 module.
Controlling the circulation pump: If the boiler does not have the required connec-
tion terminals, the circulation pump can be controlled using the "multi-functional
module 2 of 7" (VR 40) accessory unit or, if available, a VR 70 module.
Control:
Circulation/legionella protection pump: In conjunction with a multiMATIC 700/2,
the pump can be programmed to operate at specific times.
Hydraulics
Safety devices: When planning the system, check whether there are safety devices
(expansion relief valve and expansion vessel) of a sufficient size in the units. If this
is not the case, additional components must be installed in the system. When de-
signing the system, DIN EN 12828 must be observed for each heat generation cir-
cuit.
Dirt filter: It is recommended that clients fit a dirt filter to protect the heat generators
and system components in old systems from excessive ingress of dirt.
3.2.2 Preliminary note to the following system diagrams
System diagrams 3, 4, and 5 are currently not supported. You can find an overview of
the system diagrams and configurations for VR 70 and VR 71 in section 5.2, "Start-up".
In the following there is shown one example for all systems diagrams. A com-
plete overview of all system diagrams can be found in the system diagram
book.

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3.2.3 Key for system diagrams and connection diagrams
Item
Description
Item
Description
1
Heat generator
25
Solar pump unit
2
Heat generator pump
26a
Solar charging system
2a
Swimming pool circulation pump
26b
Drinking water station
2b
CHP circulation pump
27
Cylinder charging pump
2c
Hot water charging pump
28
Zone valve
3
Heat pump
29
Thermal discharge safety device
3a
Passive cooling assembly
30
Non-return valve
4
Buffer cylinder
31
Regulating valve
5
Domestic hot water cylinder
32
Cap valve
5b
DHW cylinder with pipe heat exchanger
33
Dirt trap
5c
Multi-functional cylinder
33a
Sludge separator set
6
Tank in tank
34
Increase in return flow
7
Sequence cylinder
34a
Increase in return flow mixing
8
Solar combi storage tank
35
Flow switch
9
Gas cock
36
Thermometer
10
Thermostatic radiator valve
37
Air separator
12
Unit electronics
38
Diverter valve (internal)
13
Heat generator control system
39
Thermostatic mixer
13a
Remote control unit
40
Heat exchanger
13b
Mixer module
42a
Expansion relief valve
13d
Hot water charging controller
42b
Diaphragm expansion tank
13e
System controller
42c
Diaphragm expansion vessel for drinking
water
13f
Expansion module
43
Safety group for water connection
13g
Solar module
45
Low loss header
13h
eBUS bus coupler
48
Pressure gauge
14
Swimming pool controller
49
Flow meter (Taco setter)
15
Condensate pump
50
Bypass valve
16
Outside temperature sensor/DCF receiver
51
Hydraulic block
16a
Outside temperature sensor
52
Individual room control valve
17
Drinking water station (DWS)
53
Heat recovery module
18a
Hot water charging sensor
53a
Flexible connections
18b
Hot water generation cylinder sensor
56
Heat pump brine filling unit
19
Limit thermostat
57
Brine expansion tank
20
Flush connection
58
Filling and draining valve
21
Flue gas thermostat
59
Solar automatic air vent with lock
22
Cut-off relay
60
Purging valve
24
Home unit
63
VFK solar collector

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Item
Description
Item
Description
63a
VTK solar collector
64
Solar in-line vessel
65
Collecting container
66
Pump, cooling circuit
67
3-way mixer
67a
3-way mixer, cooling
67b
3-way mixer, passive cooling assembly
68
Fan coil convector
69
Tundish
70
Air collector
71
VWL 10/3 SA outside unit
72
Well pump
84
Swimming pool
93
Compact buffer cylinder
R1
Pump
R2
Pump
R3/R4
Mixer/pump/valve
R5/R6
Mixer/valve
S1
Cylinder/solar/
Δϑ sensor temperature sensor
S2
Cylinder/solar/
Δϑ sensor temperature sensor
S3
Cylinder/solar/
Δϑ sensor temperature sensor
S4
Flow/Δϑ sensor temperature sensor
S5
Flow/Δϑ sensor temperature sensor
S6
Flow/Δϑ sensor temperature sensor
S7
PWM signal
Drinking water
Solar flow
Domestic hot water
Solar return
Circulation
Heat source flow
Wiring
Heat source return
Heating flow
Cooling flow
Heating return
Cooling return

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3.3 System diagrams and connection diagrams
System diagram 1.1
This system diagram does not contain all of the cut-off and safety devices required for correct installation. Comply with the
applicable standards and directives. Comply with the necessary minimum circulation water volumes in the heating circuit.
System diagram = 1
VR 70 configuration= 1

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Connection diagram 1.1
18b

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System diagram 1.2
This system diagram does not contain all of the cut-off and safety devices required for correct installation. Comply with the
applicable standards and directives. Comply with the necessary minimum circulation water volumes in the heating circuit.
System diagram = 1
VR 70 configuration= 3

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Connection diagram 1.2

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System diagram 1.3
This system diagram does not contain all of the cut-off and safety devices required for correct installation. Comply with the
applicable standards and directives. Comply with the necessary minimum circulation water volumes in the heating circuit.
System diagram = 1
VR 71

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Connection diagram 1.3

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System diagram 2
This system diagram does not contain all of the cut-off and safety devices required for correct installation. Comply with the
applicable standards and directives. Comply with the necessary minimum circulation water volumes in the heating circuit.
System diagram = 2
VR 70 configuration= 1

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Connection diagram 2