STOKVIS ENERGY SYSTEMS ECONOPLATE H1 User guide

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ECONOPLATE H1-heat only
HEAT INTERFACE UNIT
Installation, Commissioning
and Servicing Instructions
for vented systems.
Note: THESE INSTRUCTIONS MUST BE READ AND UNDERSTOOD BEFORE
INSTALLING, COMMISSIONING, OPERATING OR SERVICING EQUIPMENT.
THE ECONOPLATE H1 UNIT IS INTENDED FOR USE IN LOW TEMPERATURE
‘DISTRICT HEATING’ SCHEMES.
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STOKVIS ENERGY SYSTEMS
96R WALTON ROAD
EAST MOLESEY
SURREY
KT8 0DL
Tel: [phone]
Fax: [phone]
E-Mail: [email protected]
Website: www.stokvisboilers.com
ECONOPLATE H1-heatonlyvented SERIES-V1-IO&M-15072014

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CONTENTS
Item Page
1. Warnings 1
2. General Requirements 2
3. Unit Description 2
4. Technical Data 3
5. Installation 4
6. Operation of Unit 8
7. Commissioning 8
8. Fault Finding 9
9. Servicing 10
10. Internal Components 11
11. Schematics 12
12. Appendices 13
THIS HEAT INTERFACE UNIT COMPLIES WITH THE ESSENTIAL
REQUIREMENTS OF THE LOW VOLTAGE DIRECTIVE 2006/95/EC AND THE
ELECTROMAGNETIC COMPATIBILITY DIRECTIVE 2004/108/EC.
1. WARNINGS
Inside the Unit there is 230V, so Unit MUST be isolated before being worked on
and must only be serviced by a competent and authorised person.
Water within the Unit can reach temperatures of up to 85°C so great care must
be taken when changing, adjusting or servicing Components within.

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2. GENERAL REQUIREMENTS
Related Documents
The Pressure Systems Safety Regulations 2000
It is the law that pressure system appliances are installed, maintained and serviced by
competent persons in accordance with the above regulations. Failure to install
appliances correctly could lead to prosecution. It is in your own interest and that of
safety, to ensure that this law is complied with.
The installation of this Unit should be in accordance with the relevant requirements of the
Pressure System Regulations, Building Regulations and IEE Regulations.
3. UNIT DESCRIPTION
This Heat Interface Unit is designed to be used on low temperature hot water supply
of up to 85°C. The Unit is configured to provide indirect heating to a heating system,
via a heat exchanger, and has been amended specifically for use on a vented
heating system. The indirect heating can be fed to a hot water cylinder to heat up
cold water.
The Unit is housed within a powder coated steel cabinet with a removable front
cover. Inside there is manufactured pipework assembled together with an
electronic valve that is controlled by an electronic controller which takes care of the
heating demand.
This unit does have components within it to enable it to be converted for use on an
unvented system at a later stage.

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4. TECHNICAL DATA
Figure 1 – Basic Overall Dimensions including spacer hanging bracket
Technical Data
General Data
Maximum Pressure – District 6 bar
Maximum Pressure – Heating 3 bar
Maximum District Temperature 85°C
Maximum District Flow Rate 18l/min
Weight Empty 20 kg
Dimensions 469 x 630 x 276
Electrical Supply 230V – 3 Amp
Power Consumption 105W
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Temperature Range
Heating Water Temperature Range 60°C to 80°C
Water Connections
District Inlet/Outlet 3/4” BSP Male
Heating Inlet/Outlet 3/4" BSP Male
Heating Performance
Heat Output @ Δt 11K Heating Circuit 22kW
XS Head from Integral Pump @ Δt 11K 22kPa Min
System Features
 Heating Ramp-Up Time of 3 Minutes.
 Pump Anti-Lock Feature – Runs Pump for 5 Seconds every 24 Hours.
5. INSTALLATION
Figure 2 – Connection Locations
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Note – when working with the unit, supply services when connected could
reach 85°C, and once electrically connected the unit has 230V present within.
You will need access from above and below the Unit to install the relevant Pipework
to and from the Unit. A spacer plate has been provided enabling pipework to be run
behind the Unit.
Secure the spacer plate to the wall securing via 4 points provided [see below].
Mount the Unit on to the Bracket, securing it to the bracket with the screws provided.
Figure 3 – Spacer Plate
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Pipework Connections
The ‘District’ and heating pipework must be connected to the appropriate points
labelled on the figure below. An isolation/connection kit for the district in and out has
been provided, enabling isolation from the primary flow and return pipes. You must
not isolate the heating circuit from either the cold feed pipe or expansion tank.
You need to ensure that both sides of the systems you are connecting to are
clean or have been properly flushed out.
Figure 4 – Pipework Connections
District Inlet and Outlet – ¾” Male BSP
These are situated at the top of the unit with inlet on the left [Connection 1, Figure 5]
and outlet on the right [Connection 2, Figure 5]. When connecting the district supply
to and from the unit, ensure to provide air eliminator at upper most point of pipework.
Heating Inlet and Outlet – ¾” Male BSP
These are situated at the bottom of the unit with heating flow on the left [Connection
4, Figure 5] and heating return on the right [Connection 3, Figure 5]. Connect these
to your heating distribution system ensuring it has been appropriately flushed
beforehand.
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Safety Relief Discharge – ½” Female BSP
This is provided on the heating circuit, and although not in use in vented mode,
MUST still be safely piped away via a suitable tundish according to local bylaws. A
hole is provided in the casing to allow pipework to leave the unit.
Water Inlet – capped off
This connection is here should the system ever be converted to unvented. It has
been capped off both ends to indicate it is not in use, and so nothing should be
connected to this point.
Electrical Connection
All wiring to the Unit must be in accordance with the I.E.E. regulations, and any local
regulations which apply.
Note: If in any doubt, a qualified Electrician should be consulted.
Figure 5 – Terminal Block Wiring

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A 12 way terminal block has been provided inside the station to which connections
are to be made [see Figure 5 above].
Mains 230V needs to be provided to terminals 1 to 3 via cable gland in the top of the
unit. The fuse needs to be rated at 3 Amps. This will provide power to both the
Station and the Heat Meter within.
There is 230V supply for the pump over terminals 7 to 9, and you need to connect
your pump power cable to these terminals accordingly via cable gland in top of unit.
The Unit will then provide power to the pump when it is in heating mode.
In order to turn the Unit into heating mode, a switched live is to be provided over
terminals 11 and 12. Whenever power is applied over these two terminals, the Unit
will go into heating mode, and will continue to heat until power to these terminals is
switched off.
6. UNIT OPERATION
Whenever power is applied to the Unit, the Stepper Motor resets itself in order to
return to its starting setting. Once it is in the correct position the Unit is ready for its
operation.
When the switched live is activated by a requirement from your system, the Unit will
activate Heating mode after approx 5 seconds. The system Pump will be switched
on, and the Control Valve will start to operate via the Stepper Motor and will
gradually increase the temperature of the Heating water to the pre-set temperature
over a period of up to 3 Minutes. The Unit will continue to provide heating water at
the set temperature, until power over the switched live stops and the Unit will go into
standby mode.
7. COMISSIONING
Note – when working with the unit, supply services when connected could
reach 85°C, and once electrically connected the unit has 230V present within.
The Unit set point has been set to 73°C ±0.5°C, and will provide heating water to
±1.0°C of the set point. If the set point needs to be changed then you need to
access Poti P2 at the top of the electronic box. The set point can be adjusted by
rotating the Poti. The Unit can provide the heating water between 60°C and 80°C
over the range of the adjustment [assuming there is sufficient district primary]. Anti
clockwise reduces the temperature and clockwise to increase the temperature.

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Heat Meter
Booklet is provided along with these Instructions.
System Safety Relief Valve
A 3-Bar system Safety Pressure Relief Valve is provided within the Unit which MUST
be piped away via a Tundish according to local Guidelines.
8. FAULT FINDING
Firstly check the electronic box to check it is not in fault mode indicated by red light.
If the Unit still does not operate, then the next step is to check all wiring is correctly
connected to the right component, especially if Connectors have been taken off at
any stage [see Appendices – Table 1].
If the above does not rectify the problem and the Unit still does not operate
satisfactorily, then below are some suggestions of potential issues. Alternatively
consult Supplier for assistance.
Guide
Fault Possible Causes Action
‘District’ water not entering
the Unit.
Blocked Strainer. Unscrew the Strainer Cap
Bolt and take the Strainer
out, ensuring you have
isolated Unit and waited for
water to cool down. Clean or
replace accordingly.
No Heating. Heating light not coming on
controller
Control Valve not operating.
Check voltage is going to
switched live.
Check operation of relay and
replace if not working
Check that 24V is being
supplied to DC Coil.
If above does not resolve
issue, replace Stepper Motor.

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Pump not operating.
‘District’ water temperature
too low.
Check that Impeller has not
seized.
Check you have 240V going
to Pump.
If above does not resolve
issue, replace Pump.
Check ‘District’ supply
conditions.
Heat Exchanger potentially
fouled
9. SERVICING SCHEDULE
Note – when working with the unit, supply services when connected could
reach 85°C, and once electrically connected the unit has 230V present within.
It is recommended that this Unit is serviced once every 12 months.
Servicing the Strainer
Isolate the Unit from District supply. Open the screw cap from the Strainer and take
the Filter Cartridge out.
Note: The water in the Strainer could be anything up to 85°C.

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10. INTERNAL COMPONENTS
Figure 9 – Internal Components
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11. UNIT SCHEMATIC
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12. APPENDICES
Table 1 – Electronic Box Wiring Denotation
DescriptionIndividualWiringConnector
RemoteController/Temperature
Sensor
2Black WiredtoRelayviaNO
contacts
MixingValveStepperMotorBlue,Black,BrownandGreen WhiteConnector
MainsCableBlue,BrownandGreen/Yellow WiredtoTerminalBlock
EarthCableGreen/Yellow NoninsulatedCrimpRing
Pump Blue,BrownandGreen/Yellow WiredtoTerminalBlock
CHTemperatureSensor2Red BlackConnector
CHSafetyThermostat/Pressure
Switch
2Black Notused‐connected
together
Table 2 – Electronic Box Dip Switches
SWITCH FUNCTION ON OFF
1 High temp / Low temp central
heating
Low temp High temp
2 H1 Heating only Heating only [needs DIP
switch 4 on as well]
Not required
3 N/A N/A Correct
4 Single plate / Twin plate Twin Single
5 DHW preheating Enabled Disabled
6 DHW sensor Flow meter Flow switch
N.B Switch 3 should always be in the off position, otherwise unit will not work. If in doubt do
not make any changes.
Table 3 – Matrix LED
ANOTATION COLOUR LIGHT OFF LIGHT ON LIGHT FLASHING
ON Green Power Off Power On N / A
HEAT Yellow No Heat Demand In Heat Mode N / A
FAULT Red No Fault CH Saftey wire
faulty
Sensor fault – replace
failed NTC temperature
sensor

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Table 4 – Pump Data