Trianco S500 Troubleshooting guide

AIR-TO-WATER
S500, S800 & S1300 AIR SOURCE HEAT PUMP
USER, INSTALLATION, COMMISSIONING
& SERVICING INSTRUCTIONS
Please read these instructions carefully before installing
and operating this appliance.
TO BE RETAINED BY THE HOUSEHOLDER

CONTENTS
PAGE
Health and Safety
3
Important End User Safety Information
4
Declaration of Conformity
5
Introduction
6
Operating Instructions
6
Setting the Clock / Timer
6 - 7
Non-timed Control
7
Setting the Water Temperature
7
Operating Parameter Display
8
Safety Cut-Out Devices
8
Servicing
8
Simple Fault Finding
9
Tips for Lowering Energy Usage
9
After Sales Service Information
10
Technical Information
11
Dimensions and Clearances
11 - 12
Water Connections
11
Technical Specification
13
Installation Instructions
14
Introduction
14
Regulations
14
Siting and Ventilation
15
Mounting
15
Electrical
16
Internal Wiring Diagrams
17 - 19
Heating and Domestic Hot Water systems
20
Flushing and Water Treatment
20
Example System Schematics
21 –22
Drainage
23
Sealed System Components
23
System Filling
24
Commissioning
24
Servicing and Maintenance
24
Operating Parameters and Fault Finding
25 - 26
Spares List
27

HEALTH AND SAFETY INFORMATION
INFORMATION FOR THE INSTALLER AND SERVICE ENGINEERS
Under the Consumer Protection Act 1987 and the Health and Safety at Work Act 1974, it is a requirement to provide
information on substances hazardous to health (COSHH Regulations 1998).
TR Engineering takes every reasonable care to ensure that these products are designed and constructed to meet these
general safety requirements, provided they are properly installed and used.
To fulfil this requirement, products are comprehensively tested and examined before despatch.
When working on the appliance, it is the responsibility of the user/engineer to ensure that any necessary personal protective
clothing or equipment is worn appropriate to parts, which could be considered hazardous or harmful.
This appliance may contain some of the items below:
Refrigerants
The appliance contains R410a refrigerant. The constituents of R410a are HFC’s R32 AND R125, all of which have low toxicity
levels.
When handling, avoid inhalation and contact with the skin and eyes. Suitable personal protective equipment must be worn
(gloves, overalls, eye protection) and a comprehensive first-aid kit (containing eye wash) should be easily accessible.
Site engineers should have a certificate of competence and should know and understand the properties and hazards before
handling liquid refrigerants.
When the appliance has come to the end of its life span, the equipment and refrigerant must be disposed of in accordance
with EU law, by an approved engineer.
Seek urgent medical attention if inhaled or ingested. Exposure to eyes and skin should be followed by immediate cleansing of
the affected areas and medical attention if necessary.
Insulation
Fibre insulation may be irritating to the skin, eyes, nose and throat. When handling, avoid inhalation and contact with the
eyes. Use disposable gloves, face masks and eye protection.
After handling, wash hands and other exposed parts. When disposing, reduce dust with water spray and ensure all parts are
securely wrapped.
Glues, Sealants and Paints
Glues, sealants and paints are used in this appliance and present no known hazards when used in the manner for which they
are intended.

IMPORTANT SAFETY INFORMATION FOR THE END-USER
Installation of the appliance must only be carried out by persons with suitable engineering qualifications.
Do not attempt to modify, repair or service the appliance yourself.
Do not insert body parts or any other items into the air inlet or air outlet.
Do not start or stop the unit by removing the power cable; always use the controls and switches provided.
If installed outside, ensure the appliance is protected from prolonged exposure to large quantities of water.
Do not operate the unit or the programmer with wet fingers.
Upon replacement of the fuse, ensure an adequate replacement is used (e.g. not fuse wire).
Keep the programmer unit out of reach of children.
The electrical supply must be isolated during a heightened risk of lightning strikes.
Do not attempt to move the appliance once installed; this must be carried out by a qualified engineer.
Isolate the electrical supply to the appliance if an odour presents, or scorching is detected.
Only use this appliance for the purpose intended.
Ensure the area around the appliance is clean, well-ventilated and kept free of all obstructions.
Do not keep items on top of the appliance or use it to support other appliances.
Do not under any circumstances stand on the appliance.
Isolate the electrical supply to the appliance if it is to be switched off for a period of more than two weeks.
Drain the water from the water circuit if power to the unit is to be switched off during very cold weather.
Periodically check the condition of any supports for deterioration.
Do not wash the unit with water, alcohol, benzine, thinners, glass cleaner, polish or powders.
During cleaning, isolate the electrical supply to the appliance.

The following information should be completed upon installation of the appliance, for householder
reference:
Installation Engineers Signature
Company Name (if applicable)
Company Address
Company Tel. No.
Manufacturer’s Declaration of Conformity
European Directives Covered by this Declaration:
EN 55014-1 : 2000 (+A1:2001, A2:2002);
EN 55014-2: 1997 (+A1:2001);
EN 61000-3-2 : 2000 (+A2:2005);
EN 61000-3-3 : 1995 (+A1:2001);
EN 50366 : 2003;
EN 60335-2-40 : 2003 (+A11:2004) used in conjunction with
EN 60335-1:2002 (+A11:2004, A1:2004).
The Basis on Which Conformity is Being Declared
The products identified herein comply with the requirements of the
Low Voltage Directive (73/23/EEC) and the EMC Directive (89/336/EEC).
Samples of the product have been tested by the manufacturer
and a third-party certification body.

INTRODUCTION
Please note to assist TR Engineering in improving customer
service, it is important that the registration card is
completed and returned.
The Activair is a single component unit air source heat
pump, designed to provide hot water or low temperature
comfort heating by extracting heat energy from the
surrounding air.
The Activair has been designed and constructed to give
years of trouble free service, and these instructions are
provided to assist you in obtaining the best performance
with the least trouble and cost.
OPERATING INSTRUCTIONS
The appliance is controlled via the remote programmer
included with the unit. This can be situated anywhere in
the property, enabling management of the settings
without having to access the main unit.
Before starting the appliance, ensure that it has been
installed in full accordance with these instructions and that
all necessary safety checks have been carried out.
The diagram below (Fig 1) shows the programmer layout
with the controls uncovered (lift off the protective flap).
SETTING THE CLOCK
Before starting the appliance, the clock should be set to
enable control of the heat pump via the timer.
Note: the appliance operates on a 24 hour clock only.
Ensuring the programmer is on stand-by (LCD screen will
not be illuminated), press the CLOCK button twice. The
first pair of digits in the clock display will begin to flash.
Press the CLOCK adjustment buttons (+/-) until the current
hour is set.
Press the CLOCK button once more, the second pair of
digits in the clock display will begin to flash. Press the
CLOCK ADJUSTMENT buttons (+/-) until the minutes past
the hour are set.
To return to standby mode, repeatedly press the CLOCK
button until the current time is displayed in full.
Fig 1

SETTING THE TIMER
Using the timer, it is possible to set two separate time
periods at which the appliance will operate.
Ensuring the programmer is on standby (LCD screen will
not be illuminated), press the CLOCK button three times.
The first pair of digits on the clock display will flash and the
timer settings display will read ‘ON’. The number
immediately below this will indicate that programme #1 is
currently being modified.
Press the TIMER ADJUSTMENT buttons (+/-) until the time
is set to the hour you wish the appliance to start.
Press the CLOCK button; the second pair of digits in the
clock display will begin to flash. Adjust in the same way to
set the minutes past the hour.
Press the CLOCK button and set the hour you wish the
appliance to cease operation. Press the CLOCK button once
more and set the minutes past the hour.
To return to standby mode, repeatedly press the CLOCK
button until the current time is displayed. To set a second
programme, instead press the CLOCK button once.
The first pair of digits on the clock display will flash and the
timer setting display will read ‘ON’. The number
immediately below this will indicate that programme #2 is
currently being modified.
Use the TIMER ADJUSTMENT buttons (+/-) as described
above to set the second programme. After setting the
minutes past the hour, press the CLOCK button once to
return to standby mode.
To activate the programme(s), press the TIMER ON/OFF
button once. The timer status display will read ‘1’.
The Activair should now cut in and out according to the
times set. The running indicator will display the SUN
symbol whenever the appliance is operating.
Please note that during the time periods at which the
appliance is set to operate, it will not do so constantly.
When the cylinder water temperature has reached the
required level, the heat pump will cease operation until
the water has cooled or has been used. During these
periods, the SUN symbol will flash in the running indicator
display.
Please ensure that all other required parameters, such as
cylinder water temperature (see adjacent column), have
been set before operating the appliance.
To cease operation in this mode, press the TIMER ON/OFF
button once. The timer status display will read ‘0’ and the
appliance will return to non-timed control mode.
NON-TIMED CONTROL
It is possible to operate the appliance without using the
timer control. Ensure that the clock and all other required
parameters have been set before continuing.
Ensure the timer status display reads ‘0’ and press the
ON/OFF button at the top right of the programmer. The
LCD display and power indicator light will illuminate and
the appliance will start. The running indicator will display
the SUN symbol whenever the appliance is operating.
The appliance will now run until the required cylinder
water temperature is reached, at which time the SUN
symbol will flash in the running indicator display.
Please ensure that all other required parameters, such as
cylinder water temperature (see below), have been set
before operating the appliance.
To cease operation in this mode, press the ON/OFF button
once. The LCD screen and power indicator light will fade.
SETTING THE WATER TEMPERATURE
The appliance can be set to heat water between a range of
40°C and 55°C, depending upon your preference. The
water temperature can be adjusted at any time, whether
the heat pump is running or inactive.
To set the cylinder water temperature, press the
TEMPERATURE ADJUSTMENT buttons (+/-). The
temperature display will change accordingly, before
returning to displaying the current cylinder water
temperature.
When the cylinder water temperature has reached the
required level, the appliance will cease to operate until the
water in the cylinder has been used or has cooled.

OPERATING INSTRUCTIONS
(continued)
OPERATING PARAMETER DISPLAY
In certain circumstances, the unit may enter a temporary
lock-out mode in order to maintain efficient operation.
During such times, a code will appear on the programmer
display (Fig. 1). This is entirely normal and the unit will
automatically resume functioning once it has completed its
reset cycle.
In the unlikely event the appliance does not resume
operation, full descriptions of the operating parameters
and their causes can be found on Page 23.
FROST PROTECTION
As the appliance may be fitted externally to the property
being heated, the water in the system may be in danger of
freezing in very cold weather. As such, the Activair has
frost protection which will bring the heat pump on should
the temperature drop too low. However, to provide
protection in the event of a power outage, a suitable
antifreeze should be added to the system.
DEFROST MODE
If the temperature is cold enough for ice to develop on the
coil, this may become clogged and cause the appliance to
cease operation. Should this occur, the unit will
automatically enter defrost mode. This will divert heat
from the heating circuit back to the coil until the ice has
melted. The DEFROST symbol will appear above the
temperature display (see Fig. 1) during such times.
PRESSURE SWITCH
Should the refrigerant pressure within the appliance reach
too high a level, the unit will automatically switch off until
the pressure has been reduced, whereupon the unit will
restart automatically. Please note that the unit may take
several minutes to restart after the pressure switch has
operated.
Refer to the operating parameter descriptions, Page 23,
for further details.
AMBIENT TEMPERATURE CUTOUT
Should the ambient temperature around the appliance
reach too high a level, the unit will automatically switch off
until the temperature has been reduced, whereupon the
unit will restart automatically. Please note that the unit
may take several minutes to restart after the cut-out has
operated.
Refer to the operating parameter descriptions, Page 23,
for further details.
COIL TEMPERATURE CUTOUT
Should the coil temperature reach too high a level, the unit
will automatically switch off until the temperature has
been reduced, whereupon the unit will restart
automatically. Please note that the unit may take several
minutes to restart after the cut-out has operated.
Refer to the operating parameter descriptions, Page 23,
for further details.
COMPRESSOR OUTLET TEMPERATURE CUTOUT
Should the compressor outlet temperature reach too high
a level, the unit will automatically switch off until the
temperature has been reduced, whereupon the unit will
restart automatically. Please note that the unit may take
several minutes to restart after the cut-out has operated.
Refer to the operating parameter descriptions, Page 23,
for further details.
SHUTTING DOWN FOR LONG PERIODS
If power to the heat pump is shut down for a long period
during very cold weather, it is advisable to completely
drain the system. However, too frequent draining of the
system should be avoided, especially in hard water areas,
as this could lead to the build-up of scale in any heating
circuit.
SERVICING
While it is not necessary to carry out an annual service on
the appliance, regular inspections may be required,
depending upon where the unit is sited. Full details can be
found on Page 22.

SIMPLE FAULT-FINDING
If the appliance fails to start for no apparent reason, carry
out the following checks before referring to the operating
parameter and fault-finding guide (Page 23/24), or calling
your service engineer:
1) The unit may be running through a process to clear an
operating parameter condition. In most cases, this will be
cleared automatically, though if it persists, check the
programmer display (Fig. 1) for an operating parameter
number. Refer to the guide on Page 23 for full descriptions
and remedies.
2) Ensure there is a current ‘heat demand’ from the
programmer. Ensure the programmer clock and timer
controls have been set in accordance with the instructions
on Pages 6/7 or that it is switched on (if in non-timed
mode).
3) Check for failure in the electrical supply.
4) Check for a blown fuse. If the fuse has blown and the
replacement also fails, switch off the mains electrical
supply to the appliance and contact your service engineer.
5) Check the circuit breaker (if fitted). If this has tripped
reset and restart the appliance. If the circuit breaker trips
for a second time soon after, switch off the mains electrical
supply to the appliance and contact your service engineer.
Note: if the appliance has been shut down due to a failure
of the power supply, the programmer contains a battery
backup, which will allow the preservation of all settings
and timings.
If the appliance is operating, but the water temperature is
lower than expected:
1) Check that all isolation valves are fully open.
2) Check the water temperature setting is not too low. This
can be increased by following the instructions on Page 7.
3) Check that the vents on the back of the unit and the coil
have not become blocked, impeding the air flow.
4) Check the unit has not entered defrost mode (the
DEFROST symbol will appear above the temperature
display (see Fig. 1). Should this occur, the heat output from
the appliance will be diverted to the coil, until any ice
build-up has been removed.
5) Ensure there is no air trapped in either the Activair or
the heating/hot water system (Page 24).
If sounds are heard from the appliance which sound like
the passage of water, this is merely the normal movement
of the refrigerant within the unit.
If there is power to the appliance and the programmer is
providing a 'heat demand’ to the unit, yet the unit has not
entered running mode (the SUN symbol has not appeared
above the temperature display), it may be that one of the
safety cut-outs (see Page 8) has operated. These will
typically take several minutes to clear before the unit
restarts.
Other Checks
Ensure the default system settings have not been altered.
These are accessed by holding in the SEARCH button for
five seconds when the programmer is switched off. These
are factory-set and should not require adjustment.
Setting 1 –Factory set at 26.
Setting 2 –Factory set at 18.
Setting 3 –Factory set at 14.
These settings should not be altered from the above
without the express permission of TR Engineering Ltd.
If for some reason the settings do not match the figures
given above, alteration is made via the TEMPERATURE
ADJUSTMENT buttons (+/-).If for some reason the settings
do not match the figures given above, alteration is made
via the TEMPERATURE ADJUSTMENT buttons (+/-).
TIPS FOR IMPROVING PERFORMANCE AND EFFICIENCY
1) Unit maintenance has a dramatic impact upon system performance and service life. Ensure regular inspections are
carried out over the lifetime of the appliance. Dirty coils and fans reduce airflow through the system, resulting in
decreased performance. Regular checks should be carried out to ensure the cleanliness of these components. Refer
to Page 24 for details.
2) Programme the appliance to operate at times when the surrounding ambient temperature is at its highest (e.g.
noon). A thermal store may be employed to allow the retention of hot water at this time for later use.
3) If installed externally to the property being heated, the unit should be protected from high winds, as this can lead to
reduced airflow and efficiency, and also cause frost problems; though avoid siting in areas where the airflow is too
restricted, resulting in recirculation of air over the coil.
4) Well-insulate the pipework to and from the appliance to retain as much heat as possible.
5) Where possible, subscribe to economy electricity tariffs (contact your electricity supplier for more information).
6) Lower temperature settings will reduce the amount of energy consumed by the unit.

AFTER-SALES SERVICE INFORMATION
A qualified field service engineer is available to attend a
breakdown or manufacturing fault occurring while the
appliance is under guarantee.
The appliance must be made available for service during
normal working hours, Monday to Friday.
Please note, upon attendance by a
TR Engineering field service engineer, a charge will be
made on-site where:
The field service engineer finds no fault with the appliance
The cause of a breakdown is due to other parts of the
system not manufactured by
TR Engineering
The cause of the breakdown is due to incorrectly fitted
spare parts, or third-party spares not designed for specific
use with the appliance
The appliance has not been correctly installed as
recommended in these instructions, or by unqualified
persons
The breakdown occurs outside the guarantee period
The appliance has not been maintained correctly
The breakdown occurs due to use of the appliance not
sanctioned by these instructions
The breakdown occurs as a direct result of unauthorised
third-party work on the appliance
Important:
Invoices for attendance and repair work carried out on
this appliance by any third party will not be accepted
unless authorised in advance by the TR Engineering
service centre.
TECHNICAL ASSISTANCE
A team of trained technical advisors are available to
discuss any problem with the appliance which may occur.
In many cases, the problem may be solved over the
telephone, eliminating the need for a service visit.
HOW TO REPORT A FAULT
Step 1:
Contact your installer or service engineer, who should
thoroughly check all recent work before the attendance of
our field service engineer is requested.
If your own installer/service engineer is unavailable,
contact the TR Engineering service centre. Please be aware
that a charge may be made for any visit not covered by the
appliance guarantee.
Step 2:
Contact the TR Engineering service centre for assistance.
Please make a note of any operating parameter codes
which appear on the programmer display before making
contact.
Before contacting either the TR Engineering service
centre or the technical advice line, please have the
following information ready:
1) Appliance serial number or your unique customer
identification number (issued upon registration of the
appliance with TR Engineering)
2) Description of fault, including any operating parameter
code which may be displayed on the programmer
3) Date of installation
SERVICE CENTRE AND TECHNICAL SUPPORT
Tel: [phone] Fax: [phone]
Hours of Business
Monday –Thursday: 8:30 –17:00
Friday: 8:30 –14:30
Appliance Serial No.: ___________________
Cust. ID No.: ______________________
Installation Date: ____/____/____
Corrosion Inhibitor Fitted: Yes: ___ No: ___

TECHNICAL INFORMATION
Fig 2 –S500 Overall Dimensions
Fig 3 –S800 Overall Dimensions

Fig –S1300 Overall Dimensions
Fig 5 - Clearances

TECHNICAL SPECIFICATION
S500 Model
S800 Model
S1300 Model
Heating Capacity @ 7°C Ambient
4.2 kW
8.2 kW
13.0 kW
Rated Input
1.05 kW
2.05 kW
3.3 kW
Rated Input Current
4.8 amp
8.9 amp
15.3 amp
Max. Input Power
1.4 kW
3.2 kW
4.70 kW
Max. Input Current
6.2 amp
14.2 amp
20.9 amp
Minimum Flow Rate (primary water)
12 litres/min
24 litres/min
37 litres/min
Weight (empty)
45kg
75kg
96 kg
Noise Level
54 dB(A)
56 dB(A)
62 db(A)
Min. Water Output Temperature
40°C
Max. Water Output Temperature
55°C
Power Supply
230V - 50Hz Fused at 13
amp
230V - 50Hz Fused at 16
amp
230V - 50Hz Fused at 25
amp
Min. Working Pressure
0.5bar
Max. Working Pressure
3bar
Working Ambient Temperature Range
-7°C to 43°C
Flow & Return Connections
½” BSP
1” BSP
1 ¼”BSP
Required Air Flow
1648 cfm
2942 cfm
4414 cfm
Refrigerant
R410a (800g)
R410a (1350g)
R410a (1950g)
Electrical Shock Protection
1
Water Protection
IPX4
Casing Finish
White
Optional Extras
Refer to spares list, page 27.

INSTALLATION
INTRODUCTION
The Activair air source heat pump must be installed in full
accordance with these instructions and all relevant
standards.
Installation must be carried out by a fully qualified
engineer. All specialised work (e.g. electrical and handling
of refrigerants), must be carried out by suitably qualified
individuals.
All heat pumps are provided charged with refrigerant and
are fully tested and programmed, requiring only
connection to a suitable wet system, a suitable electrical
supply and the setting of the clock parameters and
required water temperature.
The Activair operates best in well-insulated buildings which
comply with current Building Regulations (Part L).
The unit utilises R417a refrigerant.
REGULATIONS
These installation notes are for guidance only, and should
be superseded by any national or local regulations which
may apply.
Installation of the appliance must comply with BS 15450
Design of Heat Pump Heating Systems, and all other
relevant British Standards and Regulations, Building
Regulations, current I.E.E. Regulations, and the Local Water
Undertakings Bylaws.
HEALTH AND SAFETY
Health and Safety at Work Act
The installer should be aware of his responsibilities under
the Act and provide, where necessary, appropriate
protection for all persons carrying out the installation
Lifting
The appliance may require two persons, or specialised
lifting equipment, to lift into position. Ensure all lifting
equipment is fully approved and checked for safety before
use.
Do not under any circumstances stand on the appliance.
SITING & VENTILATION
Important note: if the unit has been moved significantly
from an upright position prior to installation, it must be
left standing for at least 24 hours before use.
The Activair can be fitted either externally or internally (in
a loft space or similar).
The appliance must be installed in a clean, well-ventilated
area which is free of all obstructions. Please ensure enough
space is left around the unit to enable access for routine
inspections.
See Page 12, Fig. 5 for appropriate clearance dimensions.
Failure to ensure adequate clearances may hinder correct
and efficient operation of the unit.
Please note that the appliance may have to be moved in
order to gain access to some of the serviceable items from
the rear.
The appliance should not be boxed-in, as the movement of
free air is vital to the correct operation of the appliance.
Do not install the appliance in areas which have a
potential for gas leakage or with a high concentration
of salts, oils, soot and sulphur.
Do not install the appliance on a moving vehicle (e.g.
a ship or barge).
If the unit is installed outside, ensure it is adequately
protected from prolonged exposure to large quantities
of water.
Note: the unit is designed to operate normally in wet
conditions.
The appliance controls should always be sited within
the property.
The appliance should only be installed on a sturdy
base, which is level and capable of supporting the
installed weight of the unit, including its full water
content. The base should be firm enough to prevent
vibration.
If wall-mounting, ensure the wall is sturdy enough to
carry the full weight of the appliance. A wall-
mounting bracket kit is available from Trianco (see
Page 15 for mounting details).
The use of vibration pads is recommended to prevent
excess vibration and noise transmission.
Do not site above doorways or other openings.
CAUTION: Uneven Load

SITING AND VENTILATION
(Continued)
Do not install the appliance within 1000mm of television,
radio or stereo equipment.
The appliance should not be installed where it will be
exposed to unusually high wind speeds.
If the appliance is fitted within a loft, this must be fully
insulated.
Sound Levels
Whilst the low sound levels of the appliance makes it
suitable for siting externally and internally, the following
factors should be taken into consideration before
installation:
Some people are particularly sensitive to low noise levels –
discuss with the end-user and site in a place where the
least nuisance would be caused to neighbours. If in doubt,
contact the local council. If necessary, construct an
acoustic barrier.
Small rooms tend to amplify noise, particularly if the room
construction is hollow or the surface tiled.
LOFT INSTALLATION
Ensure adequate clearances are in place to enable the heat
pump to pass through the loft entrance (see Page 11, Fig 2
for unit dimensions). Ensure adequate provisions are in
place for maintenance and potential removal of the heat
pump at a future date.
The loft must be fully insulated.
The appliance should only be installed on a sturdy base,
which is level and capable of supporting the installed
weight of the unit, including its full water content. The
base should be firm enough to prevent vibration.
Do not mount directly onto the beams.
Ice can build up on the external surfaces of the unit,
provision should be made to collect the water by-product
when the unit automatically defrosts.
Ventilation/Air Flow
Inadequate airflow over the coil may result in reduced
performance. The air flow requirements are:
Model
Cubic Feet Per Minute (cfm)
S500
1648 cfm
S800
2942 cfm
S1300
4414 cfm
If adequate airflow cannot be achieved, ventilation from
the outside may be required.
MOUNTING
The appliance should be screwed firmly to a sturdy base
via the four mounting feet on the underside of the unit
(see Fig 2 - 4 for fixing dimensions). The base should be
level and capable of supporting the installed weight of the
unit, including its full water content. The base should be
firm enough to prevent vibration
The appliance should not be installed at ground level,
unless adequate provision is made to prevent water from
entering the unit, and provision is made for the drainage of
condensate via the connection on the underside (see Page
21 for drainage details).
If wall-mounting, ensure the wall is sturdy enough to carry
the full weight of the appliance. A wall-mounting bracket
kit is available from TR Engineering (part no. 224510).
Do not attach third-party components to the casing of the
Activair.
PUMP CHOICE AND FLOW RATE
Please note that a 15/50 or 15/60 pump may not be
suitable to achieve the minimum flow rate required. Please
ensure the relevant sized pump is fitted to obtain the
minimum flow rate required for the system.
Failure to achieve the flow rate can cause serious damage
to the appliance and will invalidate the warranty.
(See page 13 for required flow rate)
Fig 6 - Mounting

ELECTRICAL
230V single-phase 50Hz (fused 13 amp).
Electrical work should be carried out in accordance with
BS 7671:2001, current I.E.E. regulations and any local
regulations which may apply, by a qualified electrical
engineer.
Important: isolate the electrical supply before accessing
the inside of the appliance.
This appliance must be earthed and the earth cable must
be of a greater length than the current-carrying conductor
cables (i.e. live and neutral supply cables).
Connection to the appliance should be fixed, via a fused
(13amp) double-pole isolation switch with a contact
separation of at least 3mm in all poles and serving only the
appliance and system controls.
In the event of a fault after installation, the electrical
system should be thoroughly checked for fuse failure,
short circuits, incorrect polarity, resistance to earth, and
earth continuity.
In certain areas of the country, where there is a known risk
of high or low voltage fluctuations, the appliance should be
prevented from starting by the use of a voltage-sensitive
device if the voltage drops or increases sufficiently to
endanger the installation.
The programmer is connected to the unit via the plug
supplied with the appliance.
If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similar, for one of the
same specification as that fitted.
See (Fig. 7 - 9) for internal wiring details.
FIG 7 –S500 Internal Wiring Diagram
Connections
Flow Switch –SL & PCOM
Electric Heating –2 & (N)
Pump –3 & 4 (N)

Fig 9 –S1300 Internal Wiring Diagram
Fig 8 –S800 Internal Wiring Diagram
Connections
Flow Switch –SL & PCOM
Electric Heating –2 & (N)
Pump –3 & 4 (N)
Connections
Flow Switch –SL & PCOM
Electric Heating –2 & (N)
Pump –3 & 4 (N)

INSTALLATION (continued)
DOMESTIC HOT WATER AND HEATING SYSTEMS
Heating systems must be installed in accordance with
HVCA Codes of Practice and BS 5449 Part 1.
The flow and return water connections are made on the
right side of the unit. Flexible connectors must be fitted to
the flow and return tappings to prevent vibration to the
pipe work. Refer to Fig. 2 - 4 for pipe work dimensions.
Isolation valves must be fitted on the flow and return pipe
work close to the appliance, for ease of disconnection and
servicing. The system should be fitted with an automatic
air vent and filter.
Some typical DHW and central heating system schematics
are shown on Figs. 10 - 14 overleaf. See Page 22 for filling
instructions.
It is strongly recommended that 22mm (S500),
28mm(S800) and 35mm (S1300) diameter pipe work is
used. This will help to ensure an appropriate flow of
water through the system.
All pipe work should be insulated in accordance with the
relevant Building Regulations. All pipe work external to the
property should be kept to a minimum, and must be
insulated.
FLUSHING AND WATER TREATMENT
The performance of the appliance could be impaired by
system debris or the effects of corrosion. New systems
must be thoroughly flushed to remove metal filings, solder,
machining oils and any other fluxes or greases before
connecting the unit.
When fitting the appliance to an existing system, it is
advisable to clean the system by using an appropriate
flushing and descaling agent. Refer to BS 7593 [1992] for
guidance. System additives –antifreeze, corrosion
inhibitors and all flushing agents/descalers should be
suitable for this type of appliance. Always refer to
manufacturers' instructions.
Failure to flush and add inhibitors to the system may
invalidate the appliance warranty. The appliance must
not be run without water in the system.
HEATING PERFORMANCE
The Activair provides hot water and heating by extracting
ambient heat energy from the surrounding air. Therefore,
in lower temperature conditions, the output of the unit
will be reduced. All hot water system, cylinder, and
central heating and under floor heating sizing calculations
must take this into account. A chart of Activair heat
outputs at various ambient air temperatures can be found
on Page 13.
CYLINDER AND UNIT SIZING
The size of the cylinder to be used in conjunction with the
appliance is determined by the type of cylinder fitted.
Modern cylinders will provide details on heat-up times
based upon a particular heat input. A cylinder sized to the
requirements of the end user can then be selected.
Alternatively, approximate cylinder recovery times can be
calculated using the following formula:
(Cylinder size (litres) x 1.16 x required temperature rise)
/ 1000
This will return the kW input required for the cylinder to
fully heat up in one hour.
Example
The following example calculation is based upon a 100-litre
cylinder and a required temperature rise of 40°C (from
15°C to 55°C):
100 x 1.16 = 116
116 x 40 = 4640
4640 / 1000 = 4.64kW
This is the kW input required to heat the cylinder in one
hour. Therefore, the S300 Activair unit running at a 3kW
output would heat the cylinder in 93 minutes. The S500
Activair unit running at a 5kW output would heat the
cylinder in 55 minutes. Differences may apply depending
upon the age and type of cylinder used.
CENTRAL HEATING
If required, the Activair can provide low-temperature
comfort heating. The maximum water temperature from
the appliance is 55°C. As such, radiators should be sized
approximately 33% larger than would otherwise be
recommended for more conventional forms of heating.
Alternatively, instruct the end user to programme the
heating to come on earlier than with conventional heating,
or use double-panelled radiators.
The use of a thermal store (buffer tank) is required in order
to maintain correct water flow rates. The store may be a
direct or indirect cylinder. See Figs 10 - 14 for some
example system schematics. See page 18 for sizing
guidelines.
UNDERFLOOR HEATING
The use of a thermal store is required in order to maintain
correct water flow rates. It will also help to prevent short
cycling, improving the efficiency of the unit. The store may
be a direct or indirect cylinder. See Figs 10 - 14 for some
example system schematics. See page 23 for sizing
guidelines.

GENERAL SYSTEM SCHEMATICS
The Activair is suitable for connection to standard sealed
systems and open vent systems. The following example
schematics are for reference only. All systems must be
installed in compliance with current Building Regulations
and any local directives, which may apply.
Fig 10 –Activair Side (Sealed System)
Fig 11 –Activair Side (Open Vent System)
Fig 12 –DHW Cylinder (Open Vent System)
Fig 13 –DHW Cylinder (Sealed System)
SENSOR IN
BUFFER TANK
SENSOR IN
BUFFER TANK
BUFFER
TANK
BUFFER
TANK

SYSTEM SCHEMATICS (cont.)
Fig 14 - Buffer Tank for Standard or Underfloor Heating Circuits
Fig 15 –DHW & Heating via Tank-in-Tank with Solar Coil