Vaillant | VRC 430f | VRC 430, VR 61 UFH

VRC 430, VR 61 UFH
Product Information
Contents
1. Introduction
2. Two-zone control pack
3. Wiring centre for two zones (VR61)
4. VR61 wiring connections
5. What is the VR81?
6. What boilers can be used with the two zone control pack?
7. Control of hot water cylinders
7.1 ecoTEC plus system, ecoTEC 46 / 65 and ecoCRAFT 3 boilers
7.2 ecoTEC plus open vent boilers
8. What underfloor equipment is needed?
Appendix - Hydraulic schematics and wiring diagrams
1.0 Two radiator heating zones
2.0 ecoTEC plus 400 series - open vent boiler hydraulic schematic
2.1 ecoTEC plus 400 series wiring diagram
3.0 ecoTEC plus 600 series - system boiler hydraulic schematic
3.1 ecoTEC plus 600 series system boiler wiring diagram
4.0 ecoTEC 46 / 65 hydraulic schematic
4.1 ecoCRAFT 3 hydraulic schematic
4.2 ecoTEC 46/65 and ecoCRAFT 3 wiring diagram
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 2 of 14
Product Information
1. Introduction
The Building Regulations require that rooms over 150m2 have to be controlled by two independent time
and temperature controlled zones. To make it easier for installers to comply with the Building Regulations
a two zone control pack has been created. This consists of a weather compensator (VRC430), second
zone control (VR81), standard cylinder NTC (VR10) and the wiring centre (VR61).
The bulletin also explains the use of these controls with the VR61 and aims to make it clear how to give
the correct advice to customers so they can obtain the appropriate equipment from an underfloor heating
manufacturer.
This bulletin should also be read in conjunction with a previous product information bulletin PI 240 08
control accessories VR61 and VR81.
2. Two-zone control pack
Article Number
EAN
Description
Availability
List
Price
0020076351
4024074569207
2 zone control pack
1st November
2008
£277
Contents of two heating zone control pack:
Description
Quantity
Weather compensator (VRC430) for temperature control of one
heating zone
Second zone control (VR81) to control temperature of second
heating zone
Wiring centre (VR61) for two heating zones
Standard NTC sensor (VR10) for hot water cylinder
X1
X1
X1
X1
The items that form the two-zone control pack are not packed together in a box, the items are picked
together when the article number is ordered and shipped together. Note: Additional motorised valves and
external pumps need to be sourced separately
3. Wiring centre for two zones (VR61)
The VR61 is a two zone wiring centre for use with the VRC430 weather compensator only. This wiring
centre can be used to control two central heating zones in the configuration shown in the table below.
Heating circuit 1
(HK1)
Heating circuit 2
(HK2)
Direct
Direct
Direct
Mixed
Description
Two radiator circuits or two underfloor circuits with the same
flow temperature (hydraulic schematic 9.8)
One radiator circuit and one mixed different temperature
(typically underfloor) circuit or two underfloor circuits at different
flow temperatures (hydraulic schematics 9.1, 9.3, 9.5 and 9.6)
In addition to the above configuration the VR61 can also control a cylinder primary loading pump (LP) or
secondary circulation pump (ZP).
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 3 of 14
Product Information
4. VR61 wiring connections
Key to wiring connections
Key
A
B
Description
230 volt mains supply
LP/ ZP - cylinder primary loading pump (LP)
controlled by hot water channel on VRC430 or
secondary circulation pump (ZP) timed by
circulation pump channel on VRC430
C
Heating circuit 1 connections
D
Heating circuit 2 mixing valve connection
E
Heating circuit 2 connections
F
eBUS connection
G
Heating circuit 2 NTC connection
Comments
3A fused supply
Default for this connection is ZP (secondary
circulation pump) this must be changed on
VRC430 screen A3 if cylinder primary loading
pump control is required
Connect pump if different temperature circuit
used or motorised zone valve if same temp
circuits used
Motor open motor closed 3-port mixing valve
(not used if same temperature circuits used)
Connect pump if different temperature circuit
used or motorised zone valve if same temp
circuits used
Low voltage (24v) 0.75mm2 conductors
Used with different temperature mixed circuit to
control operation of mixing valve (supplied with
VR61)
5. What is the VR81?
The VR81 is a remote room temperature sensor for use with the VRC430 only and provides the room
temperature control for the second heating zone, it is connected via eBUS to the other components in the
system.
When combined with the VR61 and VRC430 the VR81 is necessary to
provide the temperature sensing for one of the heating zones, whilst the
VRC430 senses the temperature in the other. Both controls must be wall
mounted in either zone 1 or zone 2 with the VRC430 mounted in one zone
and the VR81 in the other zone.
Configuring the VR81
The VR81 has a default configuration to operate as a remote control. To
ensure that the VR81 controls heating zone 2 and the VRC430 controls
heating zone 1, the VR81 control must first be configured during
commissioning. An “address” must be set on the VR81. As explained in the
manual, access the installer mode by pressing and holding the “click and turn”
knob until the spanner symbol appears. Then turn the dial to select “A2”. This correctly assigns the VR81
to control heating zone 2. (This configuration can be reversed so that the VRC430 controls zone 2 and the
VR81 controls zone 1 by changing “Base display (G1)” on the VRC430 to HC2 in installation assistant
screen A2 and VR81 to A1)
Note: only one VR81 can be used with the VRC430 or VR61 combination
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 4 of 14
Product Information
6. What boilers can be used with the two zone control pack?
The ecoTEC eBUS boilers, including the ecoTEC 46 and 65 wall hung commercial and ecoCRAFT 3
boiler range can be used with the VR61.
7. Control of hot water cylinders
7.1 ecoTEC plus system, ecoTEC 46 / 65 and ecoCRAFT 3 boilers
A standard NTC sensor (VR10) which has bare ended wires is supplied with the two zone control pack
and is required to measure the cylinder temperature. This has to be connected to the orange and black
wires located in the bottom left hand section of the boiler (shown below); this will then bring the boiler on
following a demand for hot water.
The standard NTC sensor (VR10) is supplied with
bare wires, the connector has to be cut off and the
wires joined with a connector block (not supplied
by Vaillant)
7.2 ecoTEC plus open vent boilers
In order to fit the standard NTC sensor (VR10) to the ecoTEC plus open vent boiler an additional harness
is required (as shown below) this can be obtained by contacting Rochester Technical department and
asking for the ecoTEC open vent, cylinder NTC harness. The harness is connected to plug X2 on the main
PCB and replaces the existing plug. The VR10 sensor can now be fitted to the connector blocks.
Important Note: cylinders in the two-zone heating system can only be controlled using an NTC sensor
VR10. The cylinder must have a suitable positioned dry pocket, such as the Vaillant uniSTOR cylinder.
The sensor is connected from the cylinder directly to the boiler - not to the wiring centre.
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 5 of 14
Product Information
8. What underfloor equipment is needed?
The VR61 can only control a motorised mixing valve and pump, therefore if an installer intends to install
an underfloor system it is important that the following equipment is obtained from external suppliers to
allow it to be controlled by Vaillant equipment:
x
Mechanical manifold (without actuators)
x
Motorised mixing valve (motor open / motor
closed type connected to HK2 on VR61)
x
Pump (sized to match underfloor pipe connected
to HK2-P on VR61)
x
Pipe - underfloor heating pipe only
x
Pipe stat (shuts down underfloor pump in the event
of overheat, set to prevent damage to floor material.
Wired in series with underfloor pump connections)
x
Automatic Differential bypass
Note: Underfloor heating individual room control cannot be linked into Vaillant control systems
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 6 of 14
Product Information
Appendix 1 - hydraulic schematics and wiring diagrams
The following pages give detailed hydraulic schematics and wiring diagrams for open vent, system,
ecoTEC 46 / 65 and ecoCRAFT 3 boilers.
1.0 Zone configuration hydraulic schematic - all boilers
The above schematic depicts an ecoTEC plus sealed system boiler (other boiler types may require
additional system components which have not been shown) and shows an example of two heating zones
that have the same temperature water supplied to each. Instead of pumps, motorised zone valves are
fitted to control each heating zone and hot water cylinder to give independent control. The motorised zone
valves for the heating zones are wired to terminals HK1-P and HK2-P on the VR61, connection HK2 is not
used.
Note: If the above schematic is used a parameter on the VRC430 must be changed, heating circuit 2
(HC2) type must be changed from “Mixing Circuit” to “Zone” on Screen A2 - installation assistant.
A low loss header may not be required for this type of installation but if additional heating pumps are
required then a low loss header should be considered.
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 7 of 14
Product Information
1.0 ecoTEC plus 400 series - open vent boiler hydraulic schematic
Note: F&E tank omitted for clarity
The diagram above shows an ecoTEC plus 400 series open vent boiler installation with two heating zones
of different flow temperatures and a hot water cylinder.
A low loss header must be used when different temperature multiple heating circuits are used to allow
correct circulation of water through the boiler, without a low loss header the pumps in the heating and
underfloor circuits might conflict against the boiler pump and cause circulation problems in the boiler and
possibly overheating. A system bypass for an open vent boiler is not required when using a low loss
header. Further details of low loss headers can be found in Product Info bulletin PI240 08 control
accessories VR61 and VR81.
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 8 of 14
open
FB
AF
RF
DCF
close
variable temp
heating circuit
mixing valve
variable temp
heating circuit
pump
VR 10 low loss
header sensor
eBUS
variable temp
heating circuit
sensor
Wiring Centre
direct heating
heating circuit
pump
Product Information
cylinder
primary
pump LP or
sec pump ZP
1.1 ecoTEC plus 400 series wiring diagram
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
mains input
connection
second zone controller
VR 10 sensor
page 9 of 14
Product Information
2.0 ecoTEC plus 600 series - system boiler hydraulic schematic
The diagram above shows an ecoTEC plus 600 series system boiler installation with two heating zones
and hot water cylinder. The VR40 and ZP may be omitted if a secondary circulation pump is not used.
A low loss header must be used when multiple heating circuits are used to allow correct circulation of
water through the boiler, without a low loss header the pumps in the heating and underfloor circuits might
conflict and work against the boiler pump and cause circulation problems in the boiler and possibly
overheating. Further details of low loss headers can be found in Product Info bulletin PI240 08 control
accessories VR61 and VR81.
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 10 of 14
Product Information
2.1 ecoTEC plus 600 series system boiler wiring diagram
Wiring Centre
second zone controller
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 11 of 14
Product Information
3.0 ecoTEC 46 / 65 hydraulic schematic
The diagram above shows an ecoTEC 46 or 65kW boiler installation with two different temperature
heating zones and hot water cylinder. A low loss header must be used when multiple heating circuits are
used to allow correct circulation of water through the boiler, without a low loss header the pumps in the
heating and underfloor circuits might conflict and work against the boiler pump and cause circulation
problems in the boiler and possibly overheating. Further details of low loss headers can be found in
Product Info bulletin PI240 08 control accessories VR61 and VR81.
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 12 of 14
Product Information
3.1 ecoCRAFT 3 hydraulic schematic
The diagram above shows an ecoCRAFT 3 boiler installation with two different temperature heating zones
and hot water cylinder. A low loss header must be used when multiple heating circuits are used to allow
correct circulation of water through the boiler, without a low loss header the pumps in the heating and
underfloor circuits might conflict and work against the boiler pump and cause circulation problems in the
boiler and possibly overheating. Further details of low loss headers can be found in Product Info bulletin
PI240 08 control accessories VR61 and VR81.
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 13 of 14
Product Information
3.2 ecoTEC 46/65 and ecoCRAFT 3 wiring diagram
PI 249 08 Two-zone control pack
VRC430, VR61 and VR81
page 14 of 14
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising