STOKVIS ENERGY SYSTEMS ECONOPLATE H1 User guide

ECONOPLATE H1- HEAT ONLY
HEAT INTERFACE UNIT
Installation, Commissioning
and Servicing Instructions
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.
STOKVIS ENERGY SYSTEMS
34 CENTRAL PARK ESTATE
34 CENTRAL AVENUE
WEST MOLESEY
SURREY KT8 2QZ
Tel: [phone]
Fax: [phone]
E-Mail: [email protected]
Website: www.stokvisboilers.com
ECONOPLATE H1-heatonly SERIES-IO&M-V2-04072016 DOC 160 V3

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Item Page
CONTENTS
1. Warnings 1
2. General Requirements 2
3. Unit Description 2
4. Technical Data 2
5. Installation 4
6. Unit Operation 7
7. Commissioning 7
8. Fault Finding 8
9. Servicing Schedule 9
10. Internal Components 10
11. Unit Schematic 11
12. Appendices 12
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. 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.
4. TECHNICAL DATA
Figure 1 – Basic Overall Dimensions of the unit.

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Technical Data
General Data
Maximum Pressure – District 6 bar
Maximum Pressure – Heating 2.5 bar
Maximum District Temperature 85°C
Maximum District Flow Rate 18 l/min
Weight Empty 20 kgs
Dimensions 469 x 630 x 226
Electrical Supply 230V – 3 Amp
Power Consumption 105W
Temperature Range
Heating Water Temperature Range 30°C to 80°C
Water Connections
District Inlet/Outlet 3/4" BSP Male
Heating Inlet/Outlet 3/4" BSP Male
Domestic Cold Water Inlet 1/2" BSP Male
System Features
•Heating Ramp-Up Time of 3 Minutes.
•Pump Anti-Lock Feature – Runs Pump for 5 Seconds every 24 Hours.

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5.
INSTALLATION
Figure 2 – Connection Locations
Note – when working with the unit, supply services when connected could reach 85°C,
and once electrically connected the unit has 230V present within.
Refer to Figure 2 for connection dimensions. You will need access from above and below the
unit to run the relevant pipework to and from the unit. Find a suitable space to mount the unit.
Using the mounting bracket provided [see Figure 3], secure the bracket to the wall and mount
station on to the bracket hanging from the unit back panel as shown below. Once mounted,

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mark two 6mm holes on wall at the base of the station. There are four pre-drilled holes
depending on the model provided there will be access to two of them. Take station back off
the bracket, drill the two holes, insert wall plugs, re-hang the station and then secure the unit
to the wall.
Figure 3 – Mounting Bracket
Pipework Connections

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Figure 4 – Pipework Connections
The ‘District’ and heating pipework must be connected to the appropriate points labelled on
the figure 4. You need to ensure that both sides of the systems you are connecting to are
clean and have been properly flushed out.
District Inlet and Outlet – ¾” Male BSP
These are situated at the top of the unit with inlet on the left [Connection 1, Figure 4] and
outlet on the right [Connection 2, Figure 4]. 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 5,
Figure 4] and heating return on the right [Connection 4, Figure 4]. Connect these to your
heating distribution system ensuring it has been appropriately flushed beforehand.
Safety Relief Discharge – ½” Female BSP

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This is provided on the heating circuit [Connection 6, Figure 4], and 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 – ½” Male BSP
This is situated at the bottom right of the unit [Connection 3, Figure 4]. Connect mains water
supply to this connection. This is then connected to the heating circuit via a filling loop
within the station. You may use this point for filling of your heating circuit, and you need to
ensure that your circuit is above 0.8 bar for the unit to operate. Once filled you must
disconnect the hose from the filling loop, but leave on bottom tray for use when required.
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.
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 a volt free signal is received from the room thermostat, 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 the volt free signal from the
room thermostat stops and the Unit will go into standby mode.
7. COMMISSIONING
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 77°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

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of the electronic box. The set point can be adjusted by rotating the Poti. The Unit can
provide the heating water between 30°C and 80° over the range of the adjustment [assuming
there is sufficient district primary]. Anti-clockwise reduces the temperature and clockwise to
increase the temperature.
Heat Meter
This is an optional extra component. If fitted a booklet will be supplied separately.
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.
Filling Loop
Once you have filled the heating system above 0.8 bar, then you MUST disconnect the hose
between the two valves. This can be stored on the bottom tray of the unit for use if the system
needs topping up at any stage.
8.
FAULT FINDING
Firstly check the electronic box to check it is not in fault mode indicated by red light [see
Appendices – Table 3].
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
Screen out, ensuring you
have isolated Unit and
waited for water to cool
down. Clean or replace
accordingly.

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No Heating. Heating light not coming on
controller
Control Valve not operating.
Pump not operating.
‘District’ water temperature
too low.
Check a volt free signal is
coming from the room
thermostat.
Check that 24V is being
supplied to DC Coil.
If above does not resolve
issue, replace Stepper Motor.
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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Servicing the Expansion Vessel
Drain the pressure from the heating system via the pressure relief valve. Check the charge of
the pressure vessel according to system setting. (Original pre-charge, as supplied is 1.5bar).
Refill the system back to required pressure using the filling loop, but ensuring that you
disconnect the hose both ends again after use.
10.
Figure 5 – Internal Components
INTERNAL COMPONENTS

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11.
Figure 6 – Pipe Schematic
UNIT SCHEMATIC

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12.
Table 1 – Electronic Box Wiring Denotation
APPENDICES
DESCRIPTION
INDIVIDUAL WIRING
CONNECTOR
Room Thermostat
2 Black
2m Flying Lead
Mixing Valve Stepper Motor
Blue, Black, Brown and Green
White Connector
Mains Cable
Blue, Brown and Green/Yellow
2m Flying Lead
Earth Cable
Green/Yellow
Non insulated Crimp
Ring
Pump
Blue, Brown and Green/Yellow
White Connector
CH Temperature Sensor
2 Red
Black Connector
CH Pressure Switch
2 Black
White Connectors
Table 2 – Electronic Box Dip Switches
SWITCH
FUNCTION
ON
OFF
1
High temp / Low temp central
heating
Low temp
High temp
2
N/A
Correct
N/A
3
N/A
N/A
Correct
4
N/A
Correct
N/A
5
N/A
N/A
Correct
6
N/A
N/A
Correct
Table 3 – Matrix LED
ANNOTATION
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
Pressure in Heating
Circuit too low-
Top up and reset
Sensor fault – replace
failed NTC temperature
sensor.

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Table 4 – Pump Data