Evinox ModuSat User guide

ModuSat TP Twin Plate
Satellite Heating Unit
Installation, Commissioning and
Servicing Instructions
Evinox Ltd T. [phone] E. [e-mail] W. www.evinox.co.uk
2551124A

2
Contents
1GENERAL INFORMATION .......................................................4
1.1 Benefits .......................................................................................... 4
1.2 Integrating renewable energy....................................................... 5
1.3 ModuSat TP central plant.............................................................. 5
1.4 Regulation and monitoring system.............................................. 5
1.5 Warnings ........................................................................................ 5
1.6 Simbology ...................................................................................... 7
1.7 Safety Instructions ........................................................................ 7
1.8 Legislation...................................................................................... 7
2TECHNICAL FEATURES..........................................................8
2.1 ModuSat TP option 1..................................................................... 9
2.2 ModuSat TP option 2................................................................... 10
2.3 Technical features....................................................................... 11
2.4 Components................................................................................. 12
2.5 Control specification................................................................... 16
2.6 Pressure loss and head .............................................................. 17
2.7 DHW capacity............................................................................... 18
2.8 Heating capacity.......................................................................... 18
2.9 Problems and solutions.............................................................. 19
2.10 Sizing of the primary circuit ....................................................... 20
2.11 Design of the boiler room........................................................... 20
3INSTALLATION.......................................................................23
3.1 ModuSat TP option 1 dimensions.............................................. 24

3
3.2 ModuSat TP option 2 dimensions.............................................. 25
3.3 Hydraulic connections................................................................ 26
3.4 Preinstallation rig ........................................................................ 27
3.5 Wall fixing..................................................................................... 28
4CIRCUIT FILLING WATER......................................................30
4.1 Water treatment ........................................................................... 30
4.2 Water characteristics .................................................................. 30
4.3 Precautions.................................................................................. 30
4.4 Corrosion prevention.................................................................. 31
4.5 Bionibal dosage and use ............................................................ 31
4.6 Freeze prevention........................................................................ 32
4.7 Unit filling..................................................................................... 32
5ELECTRIC CONNECTIONS....................................................33
5.1 Auxiliary connections ................................................................. 33
5.2 Room Module connection........................................................... 34
5.3 Electric diagram........................................................................... 35
6COMMISSIONING ...................................................................36
6.1 Annual inspection ....................................................................... 38
6.2 Warranty....................................................................................... 38
7USE..........................................................................................40
7.1 Maintenance................................................................................. 40
7.2 Room Unit .................................................................................... 41

4
1 GENERAL INFORMATION
The Evinox ModuSat TP Twin Plate is a wall mounting satellite heating system that has
been designed to provide independent and instantaneous domestic hot water with
electronic thermostatic control and high efficiency heating. The system suits a variety of
applications such as:
Small flats
Communal housing developments
Sheltered accommodation
The ModuSat TP is the complete solution for hot water and space heating in satellite
heating systems where DHW is provided instantaneously. Heating is provided via a plate
heat exchanger, which separates primary and apartment circuits, and circulation pump.
The unit is suitable for radiator or underfloor heating with thermostatic or climatic control of
the water supply temperature.
The heating circuit side consists of a plate heat exchanger, safety valve, manometer,
thermometers, ball valves, drain valve, air valve, expansion vessel and circulation pump.
The temperature of the heating is controlled by an electronic controller with an outdoor
temperature sensor via the Bus. Depending on the application, different heat exchangers
for central or underfloor heating can be used.
The domestic hot water is prepared in the heat exchanger and the temperature is
regulated using a 2-way electronic control valve. The control of the DHW temperature
ensures a fast production of hot water and maintains a constant supply temperature. A
special reducer prevents lime scale formation.
All pipes are constructed from copper and both plate heat exchangers are made of
stainless steel. The connections are made by nuts and gaskets. The ModuSat TP unit is
fitted with a white steel casing for wall mounting.
The required flow rate is set into the ModuSat TP and the flow meter continually monitors it
and adjusts the energy shut off valve by modulation to ensure the unit always has the
required flow rate. This process makes the system self balancing and removes the
requirement for any mechanical intervention. The flow rate can be read on the room unit
and on the software remotely from site to see that the system is balanced. This enables us
to provide a screen shot to show the system is balanced and this can be used for
commissioning documentation.
The design of the ModuSat TP provides the end user with the same autonomy as if they
had their own boiler. This includes a meter for billing of energy usage and cold water
consumption for each apartment or house.
The ModuSat TP draws energy from the main heating primary circuit delivered from a
centralised plant room. This is in line with latest legislation encouraging centralised plant
rather than the use of individual heating and hot water systems.
The in-built energy meter can be tailored to meet the requirements of the building operator
and residents, ranging from simple read-only meters, to a complete remote billing solution
using BUS communication to provide the end user with a fully itemised energy bill.
1.1 Benefits
Completely independent heating and hot water for each residence
Simple to install due to factory assembled pipe work, internal wiring and integrated heat
meter
Integrates readily with renewable energy sources
Reduced installation costs
No flue or gas requirement in each apartment
Read only meters or complete remote surveillance and billing solution

5
Easy access for servicing
Minimal maintenance requirements
No additional room ventilation required
Remote monitoring, alarms and diagnostics
Can be controlled by homeowner sending SMS (text) message
No annual gas appliance inspections required
1.2 Integrating renewable energy
We are all conscious of the effect that man is having on the planet and aware also of the
spiralling cost of energy and the legislation covering this.
Over a third of all UK carbon emissions are generated in the home so any use of
renewable energy or energy saving can have a large impact on our contribution to global
warming.
The Evinox ModuSat TP satellite heating system can be integrated with renewable
technology very effectively. The main plant can include a combination of renewable energy
sources such as solar, ground source heat pumps or CHP, with top up boiler plant, to
further improve energy savings.
1.3 ModuSat TP central plant
The use of a central boiler plant is more energy efficient than employing multiple boilers, in
each individual dwelling, no matter how efficient they are.
Not only is the carbon footprint reduced but it also makes energy use much easier to
measure with individual metering for each end user.
Evinox provide central plant which can include
Gas, LPG or oil fired boilers
Wood chip or pellet boilers
Combined heat and power
Ground source heat pumps
Air source heat pumps
Solar thermal
Importantly we offer a total system solution, which includes the centralised plant, with all
elements of the system chosen to work together to create a totally integrated system that
operates at optimum performance and efficiency. The client therefore has just one place to
go for product support.
1.4 Regulation and monitoring system
Each ModuSat TP is provided with a regulation system that allows the user to set the
desired room comfort, the DHW supply temperature and to read heating and water
consumptions. The regulation system is suitable for both, radiators or floor heating, and
has been developed to permit the remote consumption download and monitoring, alarms
and diagnostic.
1.5 Warnings
Please read this manual carefully before installing, commissioning and using the ModuSat
TP. This document must be kept with care by the user.
ModuSat TP is intrinsically safe for the end user because there is no combustion inside the
unit, nor it employs any sort of gas. It also does not require a chimney connection.
The only connections required are to the electric power line for the control panel, pump
and valves and to the primary hot/cold water supply coming from the central heating
system.

6
A pre-installation rig is available to the installer, to help position and space the pipes to be
connected to the unit.
Installation and start up maintenance and service must be carried out by a registered
engineer according to the current governing regulations.
The non observance of the instructions and procedures concerning the verification of the
system correct operation may cause injuries to people.
Therefore it’s requested to the user to report any wrong operation or defect to authorised
personnel.
Any work or alteration done on the system without EVINOX official authorisation
invalidates the warranty and relieves the manufacturer from any liability.
The manufacturer has the right to make any change to the products without preventive
notice.
Compliance
EVINOX declares that all ModuSat TP units comply with European Standards 73/23/CE and
93/68/CE for low voltage electric safety, it also declares that they meet the European
Standards 89/336/CE for electromagnetic compatibility.
INSTRUCTIONS FOR PROPER DISPOSAL OF THE PRODUCT IN COMPLIANCE WITH
THE EUROPEAN STANDARD 2002/96/CE
At the end of its useful life this product cannot be disposed together with urban
waste.
It must be taken to authorised sites equipped to dispose such products.
The icon shown on the left indicates the obligation to follow the rules above.

7
1.6 Symbols
Below is a list of symbols used in this manual:
IMPORTANT NOTE REGARDING THE CORRECT DESIGN
AND PRODUCT INSTALLATION
IMPORTANT NOTE REGARDING PEOPLE SAFETY AND
ENVIRONMENT CARE
CAUTION !
DANGER OF ELECTRIC SHOCK!
CAUTION !
1.7 Safety Instructions
All installation and maintenance operations must be carried out by registered engineers
according to the current governing regulations
In case of water leaks:
Remove the electric power supply
Close the main water supply valve
Inform the authorised maintenance personnel
In case the pump is directly connected to an ambient thermostat, make sure that
this is provided with an ON/OFF switch.
We recommend the unit to be checked at least once a year by authorised
maintenance personnel. If the unit is on heavy duty, we recommend to have it
checked more than once per year.
Disconnect the electric supply before starting any work on a ModuSat TP.
1.8 Legislation
All ModuSat TP models intrinsically comply with the current legislation governing the use
of these products including heat control and energy metering.
Each user has no obligations to maintain the units.
Of course the user is not allowed to tamper with metering devices, which are regularly
checked by a supervisor/controller.
The building manager is in charge of all the user’s books as well as that of the main
system. Safety devices like expansion vessels, safety valves, etc. must be installed in the
main boiler room as in any central heating system.

8
2 TECHNICAL FEATURES
ModuSat TP is a terminal for district heating plants for heating and domestic hot water
production by means of a plate heat exchanger. The primary hot fluid is provided by a
central boiler that supplies all units through a main pump. A plate heat exchanger is placed
between the primary and secondary heating circuits in order to separate them and allow
an independent regulation in each apartment, thus simplifying the design and installation.
A variable pump is used on each secondary circuit to ensure proper operation and water
flow: the system allows to set the temperature gradient of the apartment circuit for a better
comfort control together with electric energy saving. An automatic 2-way valve controls the
DHW output temperature by modulating the primary flow. Both plate heat exchangers are
provided with insulation jackets to minimize temperature losses. The ModuSat TP is
provided with an electronic controller that can be either an ON-OFF type or a climatic type
according to the model. A class C Ultrasonic heat meter with nominal flow rate of 1.5
m3/h provides consumption measurement for both heating and domestic hot water.
The unit can be fitted with an additional meter (external installation) for water
consumption monitoring and has been developed to permit the remote consumption
download and monitoring, alarms and diagnostic. Pipes are constructed from copper and
both the plate heat exchanger from stainless steel. The ModuSat TP does not require any
balancing device as the required flow rate is set into the ModuSat TP that modulates the
shut-off valves to control the set primary water flow rate. All hydraulic connections are ¾”
male and are placed:
On the unit upper part: 1) primary circuit supply and return, domestic water inlet and outlet
2) all connections
On the unit lower part: 1) secondary circuit supply-return, drain pipe
2) drain pipe

9
2.1 ModuSat TP option 1
The cabinet is made of painted steel, white colour RAL 9010.
Dimensions: (hxlxd) 670x470x350 mm
Electric supply: 230 Vac, 50 Hz
1DH supply
2 DH return
3 DHW outlet
4 DCW inlet
5 HE supply
6 HE return
7 Circulation pump
8 Safety thermostat
9 Plate heat exchanger HE
(Insulated)
10 HE control valve
11 Drain pipe
12 DHW control valve
13 Plate heat exchanger DHW
(Insulated)
14 Filling valve
15 Manometer
16 Air vent
17 Expansion vessel
18 Safety valve HE 3 Bar
19 Heat meter
20 Lime scale reducer
21 Low pressure switch
22 MM control unit
23 Supply voltage
24 Ambient unit
25 Drain point

10
2.2 ModuSat TP option 2
The cabinet is made of painted steel, white colour RAL 9010.
Dimensions: (hxlxd) 670x470x350 mm
Electric supply: 230 Vac, 50 Hz
1DH supply
2 DH return
3 DHW outlet
4 DCW inlet
5 HE supply
6 HE return
7 Circulation pump
8 Safety thermostat
9 Plate heat exchanger HE
(Insulated)
10 HE control valve
11 Drain pipe
12 DHW control valve
13 Plate heat exchanger DHW
(Insulated)
14 Filling valve
15 Manometer
17 Expansion vessel
18 Safety valve HE 3 Bar
19 Heat meter
20 Lime scale reducer
21 Low pressure switch
22 MM control unit
23 Supply voltage
24 Ambient unit
25 Drain point

11
2.3 Technical features
Electrical
Electric supply 230 Vac
Frequency 50 Hz
Current absorption 0,6 A
Hydraulic connections
Primary circuit supply ¾” ext. thread
Primary circuit return ¾” ext. thread
Apartment circuit supply ¾” ext. thread
Apartment circuit return ¾” ext. thread
DHW supply ¾” ext. thread
DCW inlet ¾” ext. thread
Hydraulic characteristics
Primary circuit max pressure 6 bar
Apartment circuit max pressure 3 bar
Apartment circuit min pressure 1 bar
DHW max static pressure 4 bar
DCW min static pressure 0,5 bar
Heating capacity 6 kW
DHW capacity 33 kW
Max DH supply temperature 90 °C
Min DH supply temperature 70 °C
Min DH flow rate 700 l/h
Heating circuit water capacity 2,5 l
Brazing material copper
Weight and dimensions
Weight ~36 kg
Depth 350 mm
Length 470 mm
Height 670 mm

12
2.4 Components
Please find here listed the main components technical characteristics.
2.4.1 Expansion vessel 1. Upper head
2. Downer head
3. Butyl membrane
4. Pre-charge valve
5. Threaded nozzle
6. Self-adhesive label
Max operating pressure: 10 bar
Working temperature: -10 / +99 °C
Factory pre-charge: 3 +/- 20% bar
Nominal volume: 8 litres
Colour: blue
2.4.2 Pump
Model: NY:/63
n: 1850 1/min
P: 62 W
I: 0,30 A
Capacitor: 3,5 mF – 400 VDB

13
2.4.3 Heat meter RKY F Application: heating – cooling
Approval: EN1434 class 2: qp 0.6 ... 6m³/h;
MID: qp 0.6 ... 60m³/h
Ambient class: EN1434 class C/MID class E1+
M1
Ambient Temperature: °C 5 ... 55
Power supply: 3.0 VDC battery - max. 12 years
lifetime; external supply 3.0 ... 5.5 VDC
Mounting position: any position
Protection class heating: IP 54; cooling: IP 68
Interfaces Open Collector pulse output1 - output
for testing and communication2
Volume pulse value3 1 ml ... 5000 l/pulse
1: The pulse output can be chosen without galvanic isolation (standard) or with galvanic
isolation (only with battery supply). The flow sensor has by default a 4 wire impulse cable
with a length of 2.5m (5 or 10m optional)
2: The output for testing is a combined pulse output. The flow sensor can either emit a
high resolution test pulse (standard) or communicate via the same output. By using an
adapter the flow sensor can be read via the HYDRO-SET software.
3: The pulse duration is between 1 and 250 ms. It depends on the pulse value and on the
nominal flow rate qp. Standard pulse values: 1, 2.5, 10, 25, 100, 250 l/pulse
Temperature range heating - battery supplied °C 5 ... 90 / 5 ... 1051
Temperature range heating - external supplied °C qp 0.6 ... 2.5m³/h: 5 ... 130; qp 3.5 ...
60m³/h: 5 ... 1501
Temperature range cooling °C 5 ... 90 / 5 ... 1051
1: Only in rising or falling pipes or tilted installation
2.4.4 Control valves VMR valves are motorized valves used in home
applications and small installations to control the flow of
hot and cold water. The 2 ports are designed for On-Off
zone control of domestic systems. The valve, thanks to
its cylindrical shut-off, shunts flow which is independent
from the differential pressure between ports. This shut-off
can have two operating positions depending on how the
electric motor that moves it is powered. The head of the
valve can be removed without draining up the plumbing
system: this makes valve maintenance quick and flexible.
Without the head the valve is normally closed. Valves
have an external lever for manually positioning the shut-
off in its central position.

14
2.4.5 Plate heat exchangers
Due to their peculiar manufacturing ZB series
brazed heat exchangers are particularly suitable
for heating and DHW production.
Model: ZB 207
Material: Stainless steel
Brazing: Copper
Dimensions: 207x77 mm
Socket distance: 172/42 mm
N. of plates: 10-20 heating
30-40 DHW
Connections: ½” + ¾” Inox
2.4.6 HE safety valve Diaphragm safety valve with male inlet and
female outlet connections. Fitted with ¼” pressure
gauge connection.
Set pressure: 3 bar
Size ½”
EC PED compliant
Design temperature: 0-110 °C
Overpressure: 10%
Resetting pressure: 20% (min 0,6 bar)
2.4.7 Pressure switch
Electric: 230V – 50Hz
Max power: 1,5 KW
Max working pressure: 4 bar
Max working time: 60 cycles / min.
Connection: ¼”

15
2.4.8 Electronic control This is a custom designed electronic controller for
heat/cooling management units. It includes all the
measurement and control circuits to drive pumps,
valves and other devices used in such
applications. It has also three communication
channels to connect it to slave devices as well as
to a main communication bus used to collect data
from the modules.
Relay outputs: 2 (2Amax at 230Vac)
Triac outputs: 5 (3Amax at 230Vac)
Analog Outputs: 1 – 0 -10Vdc, 1 – 3Vdc (20mA)
On/Off inputs: 2 (clean contact)
Sensor inputs: 4 Pt1000, 3 NTC (range 0 -100°C)
Communication channels: 1 RS485 (isolated),
1 RS485 non (isolated), 1 local bus
Power supply: 12 - 18Vdc
Max current: 250mA
Operating temperature: 5 - 60°C
2.4.9 Lime scale reducer Lime scale has long been a major source of
trouble for domestic water supply pipes and
appliances that use hot water like washing,
machines, dish washers, steam operated irons,
kettles and so on. Many years of research
worldwide has produced evidence that lime scale
build-up can effectively be reduced by applying
electromagnetic fields around the pipe. SCALE-
OFF III is a water conditioning unit based on the
latest technology that employs high frequency
modulated pulses. It is designed to be used on
the feed of appliances that require scale
protection such as electric showers, all kind of
boilers and other water heaters. The high
frequency signals are injected into the pipe by
means of two wires, often called antennas that
are winded around the pipe. A 32 bit microprocessor generates a suitable pattern of high
frequency pulses that ‘IONIZE’ the hardness salt particles passing through the pipe. This
prevents them to stick to the pipe internal walls. Although the hardness salts are not
removed, it prevents hard scale build up.
Power supply/Power: 230Vac/3W
Power cable length: 1.5m
Operating temperature: 5 - 70°C
Humidity: Waterproof
Size: 104mm x 104mm x 58mm
Operating frequency: 1 – 10kHz
Output voltage: 18V (pulses)
Arial length: 2m each (two pieces)
Flow-rate: the greater the flow, the more effective the system is

16
2.5 Control specification All Evinox satellites are equipped with a
regulation system for heating and DHW
production control. The regulation strategy
foresees different applications: radiators,
fancoils, underfloor heating, and can be
configured to meet the needs of different
applications.
2.5.1 Heating
When the room temperature Ta drops below the set point Ts:
Pump (7) ON – Valve (10) OFF for 90 sec
Calculation of water supply temperature Tmc (climatic control)
Valve (10) ON to regulate S4 according to Tmc
Control of primary flow lower than max allowed rate (Qmax)
Pump control to keep the set value S4-S5 (priority con S4 control)
Pump (7) + Valve (10) OFF when Ta>Ts+DTs (DTs = 0,5 – 1,5 °C)
Pump (7) + Valve (10) OFF when S4>Tmmax (UFH = 45 – 55 °C)
2.5.2 DHW production
When S3 drops below a set value (30-40 °C):
Pump (7) – Valve (10) OFF
Calculation of DHW supply temperature Tmacs (comfort or economy)
Valve (12) ON to regulate S3 according to Tmacs
Control of primary flow lower than max allowed rate (Qmax)
Valve (12) OFF when S3>Tmacs+DTs (DTs = 3 – 7 °C) for more than 60 sec
It is also possible to provide heating and DWH production in the case the primary water
flow required to satisfy the DHW demand is lower than Qmax.
2.5.3 Primary flow rate balancing
It is possible to set a max allowed value for the primary water flow (Qmax). The system
activates the valves (10 and 12) to keep the actual flow rate Q lower than Qmax.
Closure priority on valve 10.
2.5.4 Safety control
In case of pressure switch ON:
Heating and DHW production OFF
Alarm on the room module display
Alarm sent to the Master

17
2.6 Pressure loss and head
The following diagrams show the primary circuit pressure loss according to the ModuSat
TP equipping and the pressure head available to the apartment circuit.
Primary circuit pressure loss
0
0,5
1
1,5
2
0 200 400 600 800 1000
Flow rate l/h
H (m)
Heating DHW
Head feature
0,00
1,00
2,00
3,00
4,00
5,00
6,00
7,00
0 1000 2000
Flow rate l/h
H (m)
Low speed Mediumspeed High speed ModuSat TPpressure loss
The head available for the apartment circuit is given by the difference between the pump
head and the ModuSat pressure loss.

18
2.7 DHW capacity
The table below shows the DHW capacity according to the primary flow rate and the PHE
model.
Model Primary Primary Primary In/Out DHW
EVINOX PART NR. Plates l/h Supply °C Return °C °C l/h
MTP30‐6/18207/30 800 80 45 10/50 690
MTP30‐6/18207/30 1000 80 45 10/50 840
MTP30‐6/18207/30 1200 80 45 10/50 950
MTP30‐6/18207/30 800 70 45 10/50 490
MTP30‐6/18207/30 1000 70 45 10/50 600
MTP30‐6/18207/30 1200 70 45 10/50 720
MTP44‐6/18207/40 1000 80 45 10/50 860
MTP44‐6/18207/40 1200 80 45 10/50 1000
MTP44‐6/18207/40 1400 80 45 10/50 1200
MTP44‐6/18207/40 1000 70 45 10/50 620
MTP44‐6/18207/40 1200 70 45 10/50 740
MTP44‐6/18207/40 1400 70 45 10/50 860
2.8 Heating capacity
The table here below shows the heating capacity according to the primary flow rate and
the PHE model.
Model Primary Primary Primary In/Out Power
EVINOX PART NR. Plates l/h Supply °C Return °C °C kW
MTP30/44‐6207/10 800 80 70 50/70 9,1
MTP30/44‐6207/10 1000 80 70 50/70 11,3
MTP30/44‐6207/10 1200 80 70 50/70 13,6
MTP30/44‐6207/10 800 70 60 40/50 9,1
MTP30/44‐6207/10 1000 70 60 40/50 11,3
MTP30/44‐6207/10 1200 70 60 40/50 13,6
MTP30/44‐18207/20 800 80 60 40/70 18,2
MTP30/44‐18207/20 1000 80 60 40/70 22,7
MTP30/44‐18207/20 1200 80 60 40/70 27,3
MTP30/44‐18207/20 800 70 55 40/55 13,7
MTP30/44‐18207/20 1000 70 55 40/55 17,1
MTP30/44‐18207/20 1200 70 55 40/55 20,5
It is recommended to feed the ModuSat TP with no less than 800 l/h.

19
2.9 Problems and solutions
Problems only occur with ModuSat TP installations if our instructions are not adhered to.
Poor insulation can result in various problems so it is imperative that the insulation
standards of BS.3958 and BS.5422 are followed at all times.
Insulation of the primary circuit
Noted errors Effects Solutions
Primary riser and connecting
pipes to the ModuSat TP not well
insulated
Overheating of common
areas
Overheating of
flat/apartment
Follow recommendation
to insulate below
Primary and cold water
distribution not well insulated Cold water reaches 20 °C and more Separate cold water pipes
Insulate according to
current regulations
Primary riser and connecting
pipes to the ModuSat TP not well
insulated
Lack of hot water
Lack of heating Carry out correct balancing
The primary distribution circuits, which supply the ModuSat TP, may be maintained at a
temperature of 70°C for the summer period and at 80°C for the winter period. The total
output of the installation of the system will be dependent on the quality of the insulation of
the primary circuit. It will be necessary to take care to choose an insulation material of
good quality and to ensure a good installation of the chosen material. Pipe rings/supports
will be selected with an integral insulation, which will limit the thermal conduction towards
the fabric of the building. Particular care will have to be taken to the insulation of the
branch connections and changes of direction. In the same way as the rising mains the
horizontal distribution network to the ModuSat TP units will be insulated perfectly up to the
satellite. The length of the horizontal distribution pipework should be limited to the
minimum while placing the rising mains as near as possible to the satellites.
Insulation thickness within service voids and risers
NOTE: A minimum of 20mm thickness insulation should be applied to all pipework within
the ModuSat TP cupboard.
Primary pipework concealed in the fabric of the building
This solution should not be used in a new
building as it can cause serious
overheating problems of the building if
detailed attention is not given to this type
of installation practice. Evinox will not be
held responsible for problems generated by bad design or bad installation practice.
Recommendations:
Use good installation practice by using pitcher tees and swept bends instead of square
tees and elbows
Use high quality pipe insulation installed by athermal insulation contractor
Obligatory use of the optional 230V energy cut off valve when the heating and hot
water are satisfied (Not applicable to solar and CHP systems)
Use insulated pipe rigs to prevent thermal transfer of heat into the fabric of the building
Pipe Size Min wall thickness
15 to 35 25 mm
35 to 60 35 mm
60 to 100 50 mm

20
2.10 Sizing of the primary circuit
The primary circuit will be sized in order to satisfy the flow necessary to each ModuSat TP
installed in each apartment. The total flow Dsupplied by the circulating pumps of the boiler
room being the sum of the individual flows of each ModuSat TP, is:
The sizing of the piped circuit constituting the primary circuit could be carried out in order
to obtain aself-balancing of the installation. The diameter of the rising main primaries will
be selected so that the pressure loss is weak compared to each apartment branch
pipework. The reduction in diameter between each branch connection will be limited or
even better non-existent. The use of a speed lower than 1 m/s, for example 0,5 m/s will be
optimal.
This way, the apartments closest to the boiler room will not require a very reduced setting
of the balancing valves. A diameter of 22 mm will be optimal for branches towards each
apartment. The pressure loss of each satellite branch is defined by the loss through
energy meter, the dirt separator, the 2-way valve, the pipework and the pressure loss of
the PHE in the ModuSat TP. The total pressure loss is 1,5 m at 1000 litres per hour.
In order to guarantee the hydraulic independence of the boilers and of the installation, a
mixing header is installed between the boilers and the primary distribution system. Use
either Evinox headers or Evinox packaged boilers with built in headers.

2.11 Design of the boiler room
The ModuSat TP’s provide each apartment with heating and hot water, which is supplied
by a primary circuit coming from a central boiler room. When the boiler room supplies one
or more buildings, its power usually exceeds 72kW and it must satisfy the regulations
relating to this size of plant.
2.11.1 Determining the kW load required for the boiler plant
The ModuSat TP can be classified in the system of production of hot water with PHE. The
power of the boiler room for heating will be calculated in a traditional way starting from the
losses of the building and the power absorbed for the production of domestic hot water
(increased by a coefficient, which will take into account the losses of distribution: for
example x 1.05).
However the boiler must be designed to satisfy the peak demand corresponding to the use
of domestic hot water considering that for DHW each apartment needs 25-30 kW
The peak hour period, taking into account the natural proliferation of collective housing
buildings, enables the power for heating and domestic hot water not to be added. A
coincidence factor has been defined statistically for centralised hot water production
systems.
See the table below (ref. GDF/SDIG gas fired collective heating).
N = number of standard housing units T = peak period in hours S = Coincidence factor