STOKVIS ENERGY SYSTEMS ECONOPLATE H1 User guide

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ECONOPLATE H1 – DHW 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
UNIT 34 CENTRAL PARK ESTATE
34 CENTRAL PARK ESTATE
WEST MOLESEY
SURREY. KT8 2QZ
Tel: [phone]
Fax: [phone]
E-Mail: [email protected]
Website: www.stokvisboilers.com
ECONOPLATE H1 – DHW ONLY SERIES-V1-IO&M-04072016 DOC190 V2

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INDEX
Item Page
1. General Warnings 2
2. General Requirements 2
3. Product Description 3
4. Technical Data 3
5. Installation 5
6. Operation of Unit 8
7. Commissioning 8
8. Fault Finding 9
9. Servicing 11
10. Internal Components 12
11. Appendix 1 – Unit Schematic 13
12. Appendix 2 – Wiring Schematic 14
13. Appendix 3 – DIP Switch and LED Lights 15
14. Appendix 4 – Pump Information 16
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.
1.0 GENERAL WARNINGS
Inside the unit there is 230V, so the unit MUST be isolated when being worked
on and must only be serviced by a competent and authorised person.
Water inside the unit can be at temperatures of up to 85°C so great care must
be t aken when c hanging, a djusting or s ervicing c omponents within t he uni t
and again must only be done by a competent and authorised person.
2.0 GENERAL REQUIREMENTS
2.1 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 the Econoplate H1 unit should be in accordance with the relevant
requirements of the Pressure System Regulations, Building Regulations and IEE
Regulations.
Caution – Risk of
Electrical Shock
Caution – Risk of
Danger

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2.2 Mains Water Connections
All connections to local water mains must comply with local requirements.
3.0 PRODUCT DESCRIPTION
This district heat interface unit is designed to be used on low temperature district hot
water supply of up to 85°C. The unit is configured to provide hot water via a heat
exchanger within the unit. The un-used connections at the base of the unit have been
connected together to ensure a water tight seal.
The Econoplate H1 unit is housed in a powder coated steel cabinet with a removable
front cover. Inside there is prefabricated pipework assembled together with a set of
electronic valves that are controlled by an electronic controller which takes care of
hot water demand.
4.0 TECHNICAL DATA
The basic overall dimensions of the unit are shown below in Figure 1.
Figure 1 – Basic Overall Dimensions
ECONOPLATE H1 UNIT

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Figure 2 – Econoplate H1 Technical Data
GENERAL DATA H1-0/14 H1-0/24 H1-0/40
Maximum Pressure - District Bar
Maximum Pressure - ColdFeed/Domestic Hot Water Bar
Maximum District Temperature °C
Maximum District Flow Rate l/min
Weight Empty kg
Dimensions HxWxD mm
Electrical Supply
Power Consumption W
WATER CONNECTIONS
District - Inlet & Outlet BSP male
Cold Inlet/Outlet & Hot Water Outlet BSP male
HOT WATER PERFORMANCE l/min
kW
District Flow Rate Required @ 80°C l/min 11.70 10.11 9.36
District Flow Rate Required @ 70°C l/min 16.76 13.45 11.98
°C 45.7 49.5 52.3
kW 44.7 49.5 53.0
District Flow Rate Required @ 70°C l/min
°C 52.0 56.5 59.7
kW 52.7 58.2 62.3
District Flow Rate Required @ 80°C l/min
°C 55.2 60.0 60.0
kW 56.7 62.6 62.6
District Flow Rate Required @ 85°C l/min
Units
21
10
230V/50Hz AC
18
39
18
18
Maximum Hot Water Output
3/4"
Maximum Hot Water Output
Maximum Hot Water Output
Nominal Hot Water Output @ 10-50°C
14
1/2"
85
6
INDIRECT HOT WATER
105
18
608x494x232
Figure 3 – System Features
Hot Water Priority
Preheat Function to keep hot water heat exchanger warm
Pump anti-lock feature – runs pump 5 secs every 24 hours
Anti-Calcification pump run on after hot water provision

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5.0 INSTALLATION
Note – when w orking w ith the unit, s upply services w hen c onnected could
reach 85°C, and once electrically connected the unit has 230V present within.
5.1 Location
Figure 4 – Connection Locations & Dimensions
Refer to above Figure 4 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.
The unit is designed for wall mounting. The unit can be mounted using a wall bracket
[see Fig 5].
Hold the bracket to the wall, making sure it is square, and mark the hanging bracket
holes on the wall and drill appropriate holes in the wall, inserting wall plugs. Screw
the bracket to the wall, ensuring the bracket is square.
Hang the unit on the bracket, mark the four locating holes on the wall, remove unit
again, drill appropriate holes in the wall, insert wall plugs, remount the unit and
secure to wall.
CONNECTION LOCATIONS

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Figure 5 - Mounting Bracket Dimensions
5.2 Pipework Connections
The ‘district’ and apartment pipework should be connected to the appropriate points
labelled on the figure 6. It is advisable to provide means of isolation and
disconnection [via unions] on all connections to the unit to facilitate replacement of
the unit if this is ever required. You need to ensure that the systems you are
connecting to, are clean and have been flushed out appropriately.
MOUNTING BRACKET

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Figure 6 – Pipework Connections
1) ‘District’ Inlet and Outlet – 3/4" Male BSP
These are situated at the top of the unit, with inlet on the left [Connection 1, Figure 6]
and outlet on the right [Connection 2, Figure 6]. When connecting the district supply
to and from the unit, ensure to provide air eliminator at upper most point of pipework.
2) Cold Water Inlet/Outlet and Hot Water Outlet – 1/2" Male BSP
These are situated at the bottom of the unit with the cold water inlet the middle of the
½” connections [Connection 4, Figure 6].
There is a cold water outlet which is denoted as Connection 5 in Figure 6. Finally the
hot water outlet is at the bottom of the unit [Connection 3, Figure 6]. Connect your
mains cold water to the cold water inlet and outlet if being used in accordance with
local by-laws, and connect your hot water distribution pipe to the hot water outlet on
the unit.
3) Un-used connections
There are two connections at the bottom of the unit (very left and right connections)
that are not required for this configuration of unit. These have been connected
together to ensure a water tight seal.
PIPEWORK CONNECTIONS

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5.3 Electrical connections
All wiring to the unit must be in accordance with the IEE regulations, and any local
regulations which apply. Note: If in any doubt a qualified electrician should be
consulted.
The unit is supplied with a 2m 3-core flying lead for connection to mains supply.
Mains connection must be done through a fused isolator rated at 3 Amps and
positioned locally to the unit.
6.0 OPERATION OF THE UNIT
Refer to Appendix 1 for system schematic to help understand how the unit works.
6.1 Unit Operation
Whenever power is applied to the unit, the stepper motors are reset to ensure they
are in their correct position, so you are likely to hear a clicking noise from the motors.
This is normal. Once the motors are in their correct position the unit is ready for its
operation.
6.2 Hot Water
Hot Water stays in the standby mode and when the hot water flow detector senses a
flow of greater than 2.1 l/m ±0.3 then the unit switches into hot water mode. The
diverter valve will switch to hot water port, the solenoid valve will open, the pump will
come on, and the mixing valve will start to operate, controlling the ‘district’
temperature to the heat exchanger to keep hot water temperature at set temperature
as long as there is sufficient temperature in the district flow.
When the flow rate goes below 2.0 l/m ±0.3 then the unit will switch out of hot water
mode. The solenoid valve will close but the pump will continue for 5 seconds to cool
down the heat exchanger to reduce lime scaling.
7.0 COMMISSIONING
Note – when w orking w ith the unit, s upply services w hen c onnected could
reach 85°C, and once electrically connected the unit has 230V present within.

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7.1 Temperature Control
The hot water flow temperatures have been factory preset. If you wish to change the
temperatures then you need to access the electronic box and take off the plug
covering the potentiometers – P1 [hot water flow temperature] [see appendix 2].
Twisting P1 potentiometer clockwise with a screwdriver will increase the temperature
and anti-clockwise will reduce the temperature.
7.2 Heat Meter
If provided the booklet is attached to these instructions.
7.3 Cold Water Meter
If provided the booklet is attached to these instructions.
7.4 System Safety Relief Valve
It is assumed that there are system safety valves in place to take care of this so no
pressure relief is provided within the unit, although please note that maximum
pressure is 6 bar.
7.5 Pre-Heat Function
There is a pre-heat function available which should only be used if length of time to
get hot water from the unit takes too long as this function might aid quicker provision
of the hot water. If this function is required, then obtain access to the electronic box
and locate the dip switches [see Appendix 2]. To turn on the pre-heat function then
flick dip switch 5 to on [see Appendix 3]. This will then heat the exchanger when it
goes to 15°C below hot water set temperature and switches back off when it reaches
10°C below hot water set temperature. This could in turn speed up time to achieve
hot water set temperature.
8.0 FAULT FINDING
Check the fault light on the electronic box [see Appendix 3].
If there are no fault lights, then firstly switch off power to the unit, wait for 10 seconds
and then re-start the unit as this will reset the stepper motors.
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. Refer to Appendix 2 for wiring explanation.
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.

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Figure 8 – Fault Finding Guide
Fault
Possible Causes
Action
‘District’ water not entering
the unit.
Blocked strainer
Solenoid valve not
operating correctly.
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.
Ensure there is positive
pressure between inlet
and outlet of valve
Check that 24V is being
supplied to the DC coil.
If above does not resolve
issue, replace solenoid
coil.
No Hot Water
No Hot Water
Solenoid valve not
operating
Control Valve not
operating or Diverter
Valve no operating
Pump not operating
See above
Check that 24V is being
supplied to either or both
DC coils.
If above does not resolve
issue, replace relevant
stepper motor
Check that impeller has
not seized.
Check you have 240 volts
going to pump.
If above does not resolve
issue, replace pump

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Hot Water Flow sensor not
working
‘District’ water
temperature too low
Flow rate is above 2.5 l/m
If light on with no flow
replace the sensor
electronic.
If light doesn’t come on
with a flow rate of more
than 2.5l/m replace sensor
electronic
Check ‘District’ supply
conditions
Low Hot Water flow rate
Heat Exchanger blocked
Blocked cold water
strainer
Flush Heat Exchanger or
replace
Take out flow sensor
cartridge and check and
clean strainer
9.0 SERVICING SCHEDULE
Note – when w orking w ith the unit, s upply services w hen c onnected could
reach 85°C, and once electrically connected the unit has 230V present within.
It is recommended that the unit is serviced once every 12 months to maintain its
efficiency and longevity.
9.1 Servicing the Strainer (Part 11 – Figure 9)
Isolate the unit from district supply. Open the screw cap from the strainer and take
the filter cartridge out. Depending on the condition either clean it or replace it and put
the screw cap back on again. Note the district water in the strainer could be 85°C.

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10.0 INTERNAL COMPONENTS
Figure 9 – Internal Components and Part Numbers
INTERNAL COMPONENTS – ECONOPLATE H1 UNIT

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Appendix 1 – Unit Schematic

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Appendix 2 – Wiring Schematic
No
Description
Individual Wiring
Connector
28
N/A
N/A
N/A
30
DHW Temperature Sensor
2 White
Black Connector
31
DHW Flow Sensor
Red, White and Blue
White Connector
32
Mixing Valve Stepper Motor
Blue, Black, Brown and Green
White Connector
33
Mains Cable
Blue, Brown and Green/Yellow
Flying Lead
34
Earth Cable
Green/Yellow
Uninsulated Crimp
Ring
35
Pump
N/a (moulded cable)
White Connector
36
Diverter Valve Stepper Motor
Blue, Black, Brown and Green
Blue Connector
37
DH Temperature Sensor
2 Red
Black Connector
38
Solenoid Valve
2 White
2 Terminal Crimps
39
Not required - Looped
2 Black
N/A

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Appendix 3 – Dip Switches and LED Lights
DIP SWITCHES
SWITCH
FUNCTION
ON
OFF
1
N/A
N/A
Correct
2
Mode Switch
N/A
Correct
3
Mode Switch
N/A
Correct
4
Mode Switch
N/A
Correct
5
DHW preheating
Enabled
Disabled
6
N/A
N/A
Correct
MATRIX LED
ANOTATION
COLOUR
LIGHT OFF
LIGHT ON
LIGHT FLASHING
ON
Green
Power Off
Power On
N / A
DHW
Yellow
No DHW Demand
In DHW Mode
Preheat Running
CH
N / A
N / A
N / A
N / A
FAULT
Red
No Fault
Requires
reset
Sensor faults – self
restoring when fault
rectified

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APPENDIX 4 – PUMP INFORMATION