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Stovax View 7 Inset High Output Boiler Inset Manual

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View 7 Inset
High Output Boiler Inset
Instructions for Use, Installation & Servicing
For use in GB & IE (Great Britain & Republic of Ireland).
PM675 Issue 5 (March 2018)
IMPORTANT
THE OUTER CASING, FRONT AND GLASS PANEL BECOME EXTREMELY HOT DURING
OPERATION AND WILL RESULT IN SERIOUS INJURY AND BURNS IF TOUCHED. IT
IS THEREFORE RECOMMENDED THAT A FIREGUARD COMPLYING WITH BS 8423:
(LATEST EDITION) IS USED IN THE PRESENCE OF YOUNG CHILDREN, THE ELDERLY
OR INFIRM.
Do not attempt to burn rubbish in this appliance.
Please read these Instructions carefully before installation or use.
Keep them in a safe place for future reference and when servicing the fire.
The commissioning sheet found on page 3 of these instructions should be completed by the Installer.
2
Covering the following models:
VW-7NHB
View 7 Inset- High Output Boiler Stoves
Contents
To receive your Extended Warranty your Stovax appliance must have
been purchased from our Expert Retailer Network and registered within
one month of purchase or installation. Please note that all warranties
are effective from the date of purchase. Any Stovax product purchased
outside of our Extended Retailer Network, or not registered within the
stated time will carry a standard 12 month warranty.
It is a condition of the Extended Warranty that the installation complies
with the relevant Building Regulations and is carried out by a suitably
trained and qualified individual (HETAS in the UK or equivalent in other
countries) with the certificate of installation and the Commissioning
Report on Page 3 completed and retained by the end user.
Full terms and conditions are detailed in the Warranty Statement on
the Stovax website www.stovax.com. In the event of any conflict of
information the wording on the website shall prevail.
Important Note: Should any problems be experienced with your
product, claims must first be submitted to the Expert Retailer where
the appliance was purchased from who will offer immediate assistance
or contact Stovax on your behalf.
Appliance Commissioning Checklist ......................3
User Instructions .......................................................4
Getting Started ...........................................................................4
User Instructions ........................................................................7
Care & Maintenance................................................................. 12
Troubleshooting ......................................................14
Installation Instructions ..........................................16
Installation Checklist ................................................................. 16
Pre-Installation Instructions ...................................................... 20
Installing the Appliance............................................................. 23
Commissioning ......................................................................... 29
Maintenance & Servicing ........................................31
Technical Appendix .................................................35
Spare Parts List ........................................................................39
Service Records ....................................................................... 40
3
Retailer appliance was purchased from:
Name:
Address:
Telephone number:
Essential information - MUST be completed:
Date Installed:
Model Description:
Serial Number:
Installation Engineer:
Company Name:
Address:
Telephone number:
Commissioning Checks - to be completed and signed:
Thermostat fitted YES NO
Is flue system correct for the appliance YES NO
Flue swept and soundness test complete YES NO
Smoke test completed on installed appliance YES NO
Spillage test completed YES NO
Use of appliance and operation of controls explained YES NO
Clearance to combustible materials checked YES NO
Instruction book handed to customer YES NO
Corrosion Inhibitor Added to Water System YES NO
Hot Water System Commissioned YES NO
CO Alarm Fitted YES NO
Signature: ............................................................................ Print Name: ..........................................................................
To assist us in any guarantee claim please complete the following information:-
Appliance Commissioning Checklist
4
Welcome
Congratulations on purchasing your View Inset Boiler, if
installed correctly Stovax hope it will give you many years of
warmth and pleasure for which it was designed.
The purpose of this manual is to familiarise you with your
appliance, and give guidelines for its installation, operation and
maintenance. If, after reading, you need further information,
please do not hesitate to contact your Stovax retailer.
1. General Points
1. General Points
1. General Points
IMPORTANT - DO NOT RUN THIS APPLIANCE
WITHOUT ANY WATER IN THE SYSTEM OR IF
IT IS SUSPECTED THE PIPES ARE FROZEN
ALWAYS REMOVE THE GLASS PLINTH AND GLASS
TOP (IF FITTED) BEFORE UNDERTAKING ANY WORK
ON THE APPLIANCE.
1.1 Before installation and/or use of this appliance please read
these instructions fully and carefully to ensure that you have
fully understood their requirements.
The appliance must be fitted by a registered installer*,
or approved by your local building control officer.
1.2 All local regulations, including those referring to national
and European Standards need to be complied with when
installing the appliance.
1.3 Only use for domestic heating. To achieve the optimum
performance from this appliance it must be installed and
operated according to these instructions burning the fuels
recommended.
1.4 You must burn only approved fuels. Do not use with liquid
fuels or as an incinerator.
1.5 Appliance surfaces become very hot when in use. Use
a suitable fireguard‡ if young children, elderly or infirm
persons are present.
Stovax offer firescreens, sparkguards and hearthgate
systems for protection. Your Stovax Retailer can advise you
about these products.
1.6 Donotplacephotographs,TV’s,paintings,porcelainor
other combustible items on the wall or near the appliance.
Exposure to hot temperatures will cause damage. Do not
place furniture or other items such as drying clothing closer
than 1m from the front of this appliance.
WARNING: Extra fuel should not be stored on or next to the
appliance. Only keep enough fuel for immediate use nearby
and never leave the appliance unattended for long periods
with any combustible material in close proximity.
1.7 Extractor fans or cooker hoods must not be placed in the
same room or space as this can cause appliance to emit
fumes into the room.
1.8 Do not obstruct inside or outside ventilation required for the
safe use of this appliance.
1.9 Do not make unauthorised changes to the appliance.
1.10 The chimney must be swept at least once a year.
See Section 13.
1.11 Do not connect, or share, the same flue or chimney system
with another appliance.
1.12 This appliance is designed to be used with the doors shut.
THERMOSTAT
This appliance is designed to be controlled by a
thermostat which regulates the rate fuel is burnt
and the amount of heat produced to hot water.
A trial and error approach will establish settings to
suit personal preference.
For Installation details refer to the instructions
(PM747) supplied with the thermostat kit.
The thermostat controls the Primary Air into the
appliance. The Primary Air Controls must be closed
in order for the thermostat to operate correctly and
efficiently.
The Primary Air Controls should only be used for
short periods during initial lighting if required.
SERIAL NUMBER
1.13 This number is required when ordering spare parts or making
warranty claims. It is found on the appliance data plate.
1.14 To access the data plate the base plinth must first be
removed. Open the door as wide as possible and lift the
plinth up to clear the 2 x fixing screws, see Diagram 1.
Lift plinth clear of 2 x screws
1
‡In the U.K. these products must conform to the
latest edition of BS 8423, Fireguards for use with
solid fuel appliances.
If appliance is operating unattended they must
conform to the latest edition of BS 3248
*Registered on the Competent Persons Scheme
(GB only see page 38/ INFO (Republic of Ireland).
Getting Started
5
1.15 The data plate is found on the swing out plate located on
the base of the appliance, see Diagram 2.
Data Plate
2
1.16 This appliance gives out its heat in two ways:
—Directly into the room in which it is fitted through
convection and radiation.
—Hot water to heat radiators and domestic hot water.
The output to hot water varies depending on how quickly
the fuel is being burnt. For more detail see the graphs on
page 18.
AIR CONTROLS
Several Stovax appliances have air systems providing
cleaner burning, and greater efficiency and control.
1) Airwash - air drawn over the window cleans the glass.
The source of Primary Combustion air when burning wood.
2) Primary Air - for use initially when establishing fires and
the main air supply when burning solid fuels.
Manually operate the following air controls using a
gloved hand and the tool provided.
3Airwash Control
CLOSE OPEN
Primary Control
CLOSE OPEN
Thermostatic
Control
OPENCLOSED
DOOR OPERATION
IMPORTANT: Stovax provide gauntlet style gloves
for the users protection from heat and any sharp
edges when using the appliance.
For your safety ensure that gloves are always
worn when opening, operating, refuelling or
handling internal metalwork.
Use a protected gloved hand and tool provided to operate.
DO NOT OPEN THE DOOR WITH BARE HANDS
DO NOT OPEN THE DOORS WHEN THE FIREBOX IS
FULL OF FLAMES - WAIT FOR THEM TO DIE DOWN.
4To Open and Close
Fit tool into side slot and lift to open
HEATING & HOT WATER SYSTEM CONTROLS
CONTROLS, GENERAL
1.17 As part of the installation of this appliance controls will have
been fitted to the heating and hot water system in order to
provide two functions:
—To control the comfort level in the house, see 1.18.
—To maintain safety in the event of misuse or mechanical
failure, see 1.20.
COMFORT CONTROLS
1.18 A programmable timer switches the pump on when heat is
required and off when it is not.
The timer, when combined with a room thermostat and / or
thermostatic radiator valves, enhances the comfort levels in
the house.
Some room thermostats combine the function with the timer
and can be programmed to reduce the room temperature
rather than turning the system off. This is effective in
not allowing rooms to become too cold and speeding up
recovery time.
1.19 The hot water cylinder can also be fitted with a thermostatic
valve which turns off the flow when the cylinder has reached
the desired temperature, but the heat leak radiator will have to
be bigger to cope with the extra load when the tank is isolated.
Getting Started
6
SAFETY CONTROLS
1.20 A high limit thermostat is fitted to the gravity flow pipe set at
80˚C.Thisthermostatshouldbeconnectedtothepumpso
thatthepumpisturnedonifthetemperatureexceeds80˚C.
This will prevent accidental boiling in the gravity circuit.
1.21 It is also recommended to fit a low limit thermostat on the
centralheatingreturnsetat45˚C.Thisthermostatwillturnthe
pumpoffifthereturntemperaturefallsbelow45˚C.Thiswill
prevent corrosion and condensation within the appliance.
NOTE – Further information on solid fuel central heating
systems can be found in the HETAS engineers training manual.
WARNING
Properly installed, operated and maintained, this
appliance will not emit fumes into the room.
Occasional fumes from de-ashing and refuelling
may occur.
Persistent fume emission is potentially
dangerous and must not be tolerated.
If fume emission does persist:
• Open doors and windows to ventilate the room.
• Leave the room.
• Allow fire to burn out and safely dispose of
fuel from the appliance.
• Check for chimney blockage and clean if
required.
• Do not attempt to relight until the cause of the
emission has been identified and corrected
• If necessary seek expert advice.
• All open flued appliances can be affected by
temporary atmospheric conditions which may
allow fumes to enter the house. Because of
this an electronic carbon monoxide detector
conforming to the latest edition of BSEN50292
must be fitted in the same room as the
appliance. The existence of an alarm must not
be considered a substitute for ensuring regular
servicing and maintenance of the appliance and
chimney system.
IF THE ALARM SOUNDS FOLLOW THE
INSTRUCTIONS GIVEN ABOVE.
Getting Started
2. Using the Appliance for the First Time
2.1 To allow the appliance to settle, and fixing glues and paint
to fully cure, operate the appliance at a low temperature for
first few days.
2.2 Do not touch the paint during the first period of use.
2.3 During this time the appliance may give off some unpleasant
odours. Keep the room well ventilated to avoid a build-up of
fumes.
2.4 Please be aware that, during use, rope seals may discolour.
This is normal.
CONDENSATION
CAUTION WHEN FILLING
2.5 When filling the boiler with water for the first time, the cold
water entering the water jacket can cause condensation to
form on the surfaces of the appliance (inside and outside).
2.6 In certain conditions this condensation could result in a
considerable amount of water, in some cases enough to fill
the bottom of the appliance. This could be even worse if the
house has recently been re-decorated, wet plastered or any
other work has been undertaken which could result in high
humidity.
2.7 Precautions must be taken to ensure that this build up of
condensate does not overflow from the appliance onto any
surrounding fabric of the room e.g. carpets.
NOTE - THIS CONDENSATION IS NORMAL DURING
FILLING AND DOES NOT INDICATE A FAULTY OR
LEAKING APPLIANCE.
NORMAL RUNNING
2.8 During normal running this condensation should be minimal
if the system is fitted with the low limit thermostat as detailed
in 1.21. This low limit thermostat prevents the system pump
from running until the appliance has reached temperature.
SEASONAL USE
2.9 If this appliance is unused for lengthy periods of time it
should be periodically checked to ensure that condensation
is not building up within the appliance.
NOTE – THIS CONDENSATION IS NORMAL AND DOES
NOT INDICATE A FAULTY OR LEAKING APPLIANCE.
If the appliance is going to be unused for very long periods
of time it is recommended to drain the system.
7
User Instructions
3. Recommended Fuels
3.1 Wood Logs:
Burn only seasoned timber with a moisture content of less
than 20%. To ensure this allow cut wood to dry for 12 to 18
months.
Wood Length
Appliance Wood Length
View 7 Inset Boiler 325mm
5
Poor quality timber:
— Causes low combustion efficiency
— Produces harmful condensation
— Reduces effectiveness of the Airwash and life of the
appliance
Do not burn construction timber, painted, impregnated
/ treated wood, manufactured board products or pallet
wood.
3.2 Solid fuel:
— Burn only anthracite or manufactured briquette
smokeless fuels listed as suitable for use with closed
heating appliances.
Do not burn bituminous coal, ‘petro-coke’ or other
petroleum based fuels as this will invalidate the product
guarantee.
3.3 Fuel consumption.
As tested at nominal heat output to the requirements of EN
13229: 2001 for intermittent operation:
Description
Fuel Consumption
Kg/hour
Wood
Kg/hour
Briquette
Smokeless fuel
View 7 Inset Boiler 3.6 1.8
3.4 For advice on suitable solid fuels contact your local
approved coal merchant*.
A number of factors can affect the performance of the
appliance. See Troubleshooting Section for details.
4. Lighting the Appliance
IMPORTANT: Stovax provide gauntlet style gloves
for the users protection from heat and any sharp
edges when using the appliance.
For your safety ensure that gloves are always
worn when opening, operating, refuelling or
handling internal metalwork.
4.1 Whether using wood or solid fuel the process for lighting the
appliance is the same.
4.2 For best results manually set air controls as shown in
Diagram 6.
6Airwash: Fully Open
Primary Air: Fully Open
4.3 Place firelighters, or paper, and dry kindling wood on the
grate or Woodburning tray.
A successful fire initially requires plenty of kindling to
establish a hot firebox and warm the chimney to aid flue
performance.
4.4 Light the paper or firelighters, see Diagram 7.
7
4.5 Leave the door slightly open as the fire establishes and
the glass warms to avoid build up of condensation.
*In the U.K:
• Ring the Solid Fuel Association advice line on
0845 601 4406 for details
• Visit their web site at www.solidfuel.co.uk
8
4.6 Add larger pieces of wood.
Do not use full sized logs at this stage, build up gradually in
size. Too many logs may smother the fire.
Do not load fuel above the log guard or the base of the
baffle, see Diagram 8.
Base of baffle
Log Guard
8
—Close the door.
Do not run with the door slightly open except for initial
lighting as this could cause over-firing and damage the
appliance.
Once the fire is established close the Primary Air Controls
and set the thermostat to the desired temperature.
5. Running the Appliance
5.1 Only for use with recommended fuels, see Section 3 for
full details.
— Burning Soild Fuels, see 5.2.
— Burning Wood on a Multi-fuel Grate or when a
Woodburning tray is fitted, see 5.14.
Wood can be burned on the multi-fuel grate, but if wood is
to be used constantly a Woodburning tray should be fitted,
see Section 6.
Burning Soild Fuels
To burn smokeless fuels the cast iron multi-fuel kit supplied
with the product must be fitted.
5.2 Allow the fire to become established before adding the solid
fuel, see Section 4.
5.3 Open the Primary Air Control fully to establish a glowing
bed before adding new fuel.
5.4 De-ash the grate before re-fuelling (see User Instructions,
Section 8).
5.5 Add the correct amount of fuel, see Section 3.
5.6 Close the doors immediately after refuelling.
Burn new fuel at a high temperature for a few minutes before
adjusting the Primary Air Control to the desired setting.
User Instructions
Refuel little and often for clean, efficient burning.
Manually operate the following air controls using a
gloved hand or the tool provided.
9Airwash: Closed
Primary Air: Closed
Thermostatic
Control: Adjust
5.7 Close the Primary and Airwash Controls.
5.8 Control the temperature and hot water output using the
Thermostatic Control.
THERMOSTAT
This appliance is designed to be controlled by the
thermostat which regulates the rate fuel is burnt
and the amount of heat produced to hot water.
A trial and error approach will establish settings to
suit personal preference.
5.9 The thermostat operates by controlling combustion air
entering the boiler. The higher the thermostat setting the
hotter the temperature of the water leaving the boiler. The
lower the setting the lower the temperature of the water
leaving the boiler.
NOTE IF THE THERMOSTAT IS SET TO
MAXIMUM THE WATER LEAVING THE BOILER
WILL BE APPROXIMATELY 85˚C.
Setting Indicator
-
+
10
Control Knob
9
User Instructions
5.10 The exact setting of the thermostat and the manual Air
Controls may need slight adjustment by trial and error to suit
requirements.
Operate the follow controls manually:
Primary Air Control
When burning solid fuel more Primary Air will increase the
heat output and burn the fuel more quickly.
Do not burn large amounts of fuel with the Primary Air
Control on a low combustion setting for long periods of
time. This causes tars and creosotes to build-up in the
appliance and flue system.
Airwash Control
A small amount of Airwash can sometimes help to keep the
glass clean but will reduce efficiency.
Experience establishes settings to suit personal preference.
Over-firing
When in use, burning the appliance at a high temperature
for a short period reduces tars and creosotes.
DO NOT OPERATE THE APPLIANCE WITH THE PRIMARY
AIR CONTROL OPEN FOR LONG PERIODS OF TIME AS
THIS COULD CAUSE OVER-FIRING AND MAY CAUSE
PERMANENT DAMAGE.
5.11 Only anthracite or smokeless fuels suitable for use in
closed appliances must be burnt in this appliance.
5.12 Do not burn bituminous coal, ‘petro-coke’ or other
petroleum based fuels as this invalidates the product
guarantee.
5.13 Do not load fuel above the log guard and the Secondary
Air Inlets at the back of the firebox, see Diagram 8.
Wood Burning
5.14 This section applies to burning wood on a Multi-fuel grate or
when a Woodburning tray is fitted.
Wood can be burnt on the multi-fuel grate, but if wood is to
be used constantly a Woodburning tray should be fitted, see
Section 6.
DO NOT BURN SOLID FUEL ON A WOODBURNING
TRAY AS THIS MAY CAUSE PERMANENT DAMAGE.
When fitted with a Multi-fuel grate only:
Do not de-ash the grate completely.
All Models:
Wood burns best on a bed of ash (approx. 25mm (1") deep).
5.15 Rake the embers evenly over the firebed and open the
Airwash Control fully for a few minutes before re-fuelling.
5.16 Do not refuel when a large amount of flames are present
in the firebox as this could cause smoke or flames to
spill into the room.
5.17 Add the correct amount of fuel, see Section 3.
5.18 Close the doors immediately after refuelling.
5.19 Burn new logs at a high temperature for a few minutes before
adjusting the Airwash Control. Refuel little and often for clean,
efficient burning. More Airwash will increase the heat output,
burn fuel more quickly and will help keep the glass clean.
Manually operate the following air controls using a
gloved hand or the tool provided.
11 Airwash: 30%
Primary Air: Closed
Thermostatic
Control: Adjust
5.20 Close the Primary Air Controls and adjust the Airwash
Control to approximately 30% open.
5.21 Control the temperature and hot water output using the
Thermostatic Control.
THERMOSTAT
This appliance is designed to be controlled by the
thermostat which regulates the rate fuel is burnt
and the amount of heat produced to hot water.
A trial and error approach will establish settings to
suit personal preference.
5.22 The thermostat operates by controlling combustion air
entering the boiler. The higher the thermostat setting the
hotter the temperature of the water leaving the boiler. The
lower the setting the lower the temperature of the water
leaving the boiler.
10
NOTE IF THE THERMOSTAT IS SET TO
MAXIMUM THE WATER LEAVING THE BOILER
WILL BE APPROXIMATELY 85˚C.
Setting Indicator
-
+
12
Control Knob
5.23 The exact setting of the thermostat and the Manual Air
Controls may need slight adjustment by trial and error to suit
requirements.
Operate the follow controls manually:
Primary Air Control
Small amounts of Primary Air can sometimes help to
maintain a hot fuel bed and boost hot water output.
Airwash Control
Opening the Airwash Control will increase the visual flame.
Do not burn large amounts of fuel with the Airwash
Control closed for long periods of time. This reduces the
glass cleaning effect of the Airwash and causes tars and
creosotes to build-up in the appliance and flue system.
5.24 Experience establishes settings to suit personal preference.
Over-firing
5.25 When in use, burning the appliance at a high temperature
for a short period reduces tars and creosotes.
DO NOT OPERATE THE APPLIANCE WITH THE PRIMARY
AIR CONTROL OPEN FOR LONG PERIODS OF TIME AS
THIS COULD CAUSE OVER-FIRING AND MAY CAUSE
PERMANENT DAMAGE.
Shut Down
5.26 If there is still burning fuel in the firebox, Stovax do not
recommend shutting down the air controls completely
unless there is a chimney fire in progress (see section 10
for advice). Closing the controls during the burning process
will cause poor combustion and could lead to a build up of
gasses that could ignite dangerously.
5.27 Always have enough air entering the appliance to maintain
some flame within the firebox.
5.28 If it is necessary to shut down the appliance then run on a
high setting until all of the fuel has been burnt before closing
the air controls.
User Instructions
6. Woodburning Tray
In order to burn wood continuously in a Multi-fuel appliance
a Woodburning Tray must be fitted.
For details on purchasing a Woodburning Kit for this
appliance contact your retailer.
Front edge
13
6.1 Remove the riddling mechanism from the appliance
(see Pre-Installation, Section 6).
To fit the Wood Burning Tray:
6.2 Remove the log guard and ashpan.
6.3 Hold the tray flat with the front edge pointing forwards, tilt
diagonally and insert through the front of the appliance,
see Diagram 14.
14
6.4 Place tray flat on the fixings on the firebed,
see Diagram 15.
15
27
7. Electrical Supply
7.1 Electrical connections must meet the requirements of
national Building Regulations† and standards‡, along with
any European, local regulations and working practices that
may apply. Should conflict occur between these instructions
and these regulations then the regulations must be followed.
The connection to the mains supply should allow
complete electrical isolation and only serve the heating
circuit pump.
All water connections should be completed by a competent
person to meet the requirements of local water authority
by-laws.
CONVENTIONAL PIPEWORK SYSTEMS
All pipe work must be able to operate at above 100
degrees Celsius. Any pipe work installed in an exposed
position e.g. loft space must have provision to prevent
freezing.
Ensure the pipe work system has sufficient drain
points to enable the complete removal of water for the
purposes of servicing.
8. Gravity Pump Circuit
8.1 To prevent the risk of boiling it is essential to arrange the
pipe work and position the hot water cylinder and heat leak
radiator so that gravity circulation can take place when the
pump is not running. Position the cylinder and the radiator
vertically above the boiler with sufficient height to encourage
gravity flow.
8.2 Horizontal pipe work in a gravity system must have an
incline of at least 5mm in every 1000mm and a minimum
diameter of 28mm. Vertical pipe must have a minimum
diameter of 22mm.
8.3 Any motorised valves fitted in this circuit must return to the
fully open position when the power is interrupted.
9. Pump Assisted Central Heating
9.1 The most common arrangement is to have a pumped central
heating circuit combined with a gravity hot water circuit. This
arrangement requires careful balancing of the two in order
to avoid the gravity circuit being starved when the pump is
running.
To overcome this problem it is common practice to fit an
injector tee where the pumped central heating return re-joins
the gravity return from the hot water cylinder. This injector tee
induces a much stronger gravity flow when the pump runs.
Only use proprietary injector tees, homemade ones are
difficult to get right.
9.2 When installing a system that has pumped central heating
and gravity hot water it is recommended to use all 4
boiler tappings. Each flow and return should be diagonally
opposite each other.
10. Fully Pumped System
10.1 In many installations (especially new build) a fully pumped
system is the best choice to give increased control.
WARNING - To prevent the risk of boiling it is essential
to arrange the pipe work and position the hot water
cylinder and heat leak radiator so that gravity
circulation can take place when the pump is not
running. Any motorised valves fitted in this circuit must
return to the fully open position when the power is
interrupted.
11. Sealed (Pressurized) System
11.1 Do not fit this appliance to sealed or pressurised systems or
an unvented hot water cylinder.
12. Pipework Diagrams
12.1 See below for a typical layout of a pumped central heating
and gravity hot water circuit.
HEATING SYSTEM CONTROLS
CONTROLS GENERAL
1.1 The controls fitted to the system will provide two functions:
— To control the comfort level in the house.
— To maintain safety in the event of misuse or mechanical
failure.
COMFORT CONTROLS
1.2 This primarily consists of a time clock wired into the pump.
The pump is switched on when heat is required and when it
is not, the pump is switched off.
The time clock, when combined with a room thermostat and
or thermostatic radiator valves, enhances the comfort levels
in the house.
Some room thermostats combine the function with the
time clock and can be programmed to reduce the room
temperature rather than turning the system off. This is
effective in not allowing the rooms to become too cold and
speeding up recovery time.
1.3 The hot water cylinder can also be fitted with a thermostatic
valve which turns off the flow when the cylinder has reached
the desired temperature but the heat leak radiator will have
to be bigger to cope with the extra load when the tank is
isolated.
SAFETY CONTROLS
1.4 This primarily consists of a high limit thermostat fitted to
thegravityflowpipesetat80˚C,thisthermostatshould
be connected to the pump so that the pump is turned on if
thetemperatureexceeds80˚C.Thiswillpreventaccidental
boiling in the gravity circuit.
Installation Instructions
… 27 …


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