Lochinvar HERALD HCB61CE, HERALD HCB86CE Installation Manual

Document

HERALD
FLOOR STANDING GAS
CONDENSING BOILERS
FIRED
Installation, Commissioning, Maintenance and User
Instructions
MODELS:
HCB46CE
HCB61CE
HCB86CE
1
installation manual_herald 46-86_februaury 2018
Table of Contents
1.0
2.0
INTRODUCTION ...................................................................................................................................................................................................................................... 4
SAFETY GUIDELINES............................................................................................................................................................................................................................. 5
2.1
GENERAL DESCRIPTION OF SAFETY SYMBOLS USED............................................................................................................................................................ 5
2.2
WHAT TO DO IF YOU SMELL GAS ................................................................................................................................................................................................ 6
3.0
PRINCIPAL PARTS ................................................................................................................................................................................................................................. 7
4.0
TECHNICAL DATA .................................................................................................................................................................................................................................. 9
5.0
DIMENSIONS AND CLEARANCES ...................................................................................................................................................................................................... 10
5.1
DIMENSIONAL DRAWINGS .......................................................................................................................................................................................................... 10
5.2
CLEARANCES ................................................................................................................................................................................................................................ 11
6.0
GENERAL REQUIREMENTS ................................................................................................................................................................................................................ 12
6.1
RELATED DOCUMENTS ............................................................................................................................................................................................................... 12
7.0
WATER QUALITY .................................................................................................................................................................................................................................. 13
8.0
LOCATION ............................................................................................................................................................................................................................................. 13
8.1
PLANT ROOM REQUIREMENTS .................................................................................................................................................................................................. 13
8.2
GENERAL REQUIREMENTS ......................................................................................................................................................................................................... 13
8.3
CLEARANCES ................................................................................................................................................................................................................................ 14
8.4
CONDENSATE DRAIN ................................................................................................................................................................................................................... 14
9.0
GAS SUPPLY ......................................................................................................................................................................................................................................... 14
9.1
SERVICE PIPES ............................................................................................................................................................................................................................. 14
9.2
METERS.......................................................................................................................................................................................................................................... 14
9.3
GAS SUPPLY PIPES ...................................................................................................................................................................................................................... 14
9.4
BOOSTED SUPPLIES .................................................................................................................................................................................................................... 14
9.5
PLANT-ROOM CONTROL VALVE ................................................................................................................................................................................................ 14
10.0
FLUE SYSTEM ....................................................................................................................................................................................................................................... 16
10.1
FLUE SYSTEM GENERAL REQUIREMENTS .............................................................................................................................................................................. 16
10.2
FLUE SYSTEM TECHNICAL DETAILS ......................................................................................................................................................................................... 17
10.3
FLUE DISCHARGE......................................................................................................................................................................................................................... 17
10.4
CONDENSATE DRAIN ................................................................................................................................................................................................................... 17
10.5
APPROVED FLUE SYSTEM .......................................................................................................................................................................................................... 19
10.6
INSTALLATION PRECAUTIONS ................................................................................................................................................................................................... 19
10.1
ROOM SEALED (TYPE C) FLUE ASSEMBLY .............................................................................................................................................................................. 20
10.2
INSTALLATION OF FLUE TRANSITION KIT TO HCB46CE-HCB61CE BOILERS ..................................................................................................................... 20
10.3
INSTALLATION OF TRANSITION KIT TO HCB86CE BOILER .................................................................................................................................................... 22
11.0
FLUE TERMINAL INSTALLATION ....................................................................................................................................................................................................... 25
11.1
TYPE C13 (Horizontal room sealed) ................................................................................................................................................................................................ 25
11.2
FLUE TERMINAL GUARDING ....................................................................................................................................................................................................... 26
11.4
TYPE C33 (Vertical room sealed) .................................................................................................................................................................................................... 28
11.5
TYPE C43 (U duct) ........................................................................................................................................................................................................................... 34
11.6
TYPE C53 (Twin pipe) ...................................................................................................................................................................................................................... 34
11.7
TYPE B23 (Conventional flue with fan assistance) ......................................................................................................................................................................... 39
11.8
C63 Certified Flue Systems ............................................................................................................................................................................................................ 40
12.0
AIR SUPPLY .......................................................................................................................................................................................................................................... 41
12.1
COMBUSTION VENTILATION ....................................................................................................................................................................................................... 41
12.2
COOLING VENTILATION ............................................................................................................................................................................................................... 41
13.0
WATER CONNECTIONS ....................................................................................................................................................................................................................... 42
13.1
GENERAL ....................................................................................................................................................................................................................................... 42
13.2
OPEN VENTED SYSTEM ARRANGEMENT ................................................................................................................................................................................. 42
13.3
SEALED SYSTEM ARRANGEMENT............................................................................................................................................................................................. 42
14.0
SCHEMATICS ........................................................................................................................................................................................................................................ 44
14.1
key for schematics .......................................................................................................................................................................................................................... 44
14.2
CIRCULATING PUMPS .................................................................................................................................................................................................................. 47
14.3
PRIMARY PIPEWORK HEADER SIZING ...................................................................................................................................................................................... 48
15.0
ELECTRICAL SUPPLY ......................................................................................................................................................................................................................... 49
15.2
EXTERNAL CONTROLS ................................................................................................................................................................................................................ 49
15.3
HIGH VOLTAGE CONNECTOR STRIP ......................................................................................................................................................................................... 50
15.4
LOW VOLTAGE CONNECTOR STRIP ......................................................................................................................................................................................... 50
15.5
ELECTRICAL CONNECTIONS ...................................................................................................................................................................................................... 52
15.6
FUSES............................................................................................................................................................................................................................................. 52
15.7
ARC WELDING PRECAUTIONS ................................................................................................................................................................................................... 52
15.8
WIRING DIAGRAM ......................................................................................................................................................................................................................... 53
15.9
LADDER DIAGRAM ........................................................................................................................................................................................................................ 54
16.0
SMART SYSTEM CONTROL ................................................................................................................................................................................................................ 55
16.1
GENERAL ....................................................................................................................................................................................................................................... 55
16.2
SMART SYSTEM CONTROL PANEL ............................................................................................................................................................................................ 55
ACCESS MODES ........................................................................................................................................................................................................................... 55
16.3
SAVING PARAMETERS................................................................................................................................................................................................................. 56
16.4
STATUS DISPLAY SCREENS ....................................................................................................................................................................................................... 58
17.0
COMMISSIONING AND TESTING ........................................................................................................................................................................................................ 60
17.1
ELECTRICAL INSTALLATION ....................................................................................................................................................................................................... 60
17.2
GAS INSTALLATION ...................................................................................................................................................................................................................... 60
17.3
WATER CONNECTIONS ............................................................................................................................................................................................................... 60
17.4
COMMISSIONING THE EQUIPMENT ........................................................................................................................................................................................... 60
17.5
TEMPERATURE ADJUSTMENT PROCEDURE ........................................................................................................................................................................... 61
17.6
INSTALLATION NOISE .................................................................................................................................................................................................................. 61
18.0
LPG FUEL .............................................................................................................................................................................................................................................. 62
18.1
RELATED DOCUMENTS ............................................................................................................................................................................................................... 62
18.2
CONVERSION TO LPG .................................................................................................................................................................................................................. 62
18.3
LPG COMMISSIONING AND TESTING ........................................................................................................................................................................................ 64
19.0
MAINTENANCE ..................................................................................................................................................................................................................................... 65
19.1
GENERAL ....................................................................................................................................................................................................................................... 65
19.2
MAINTENANCE SCHEDULE ......................................................................................................................................................................................................... 65
19.3
BURNER INSPECTION .................................................................................................................................................................................................................. 65
2
19.4
19.5
19.6
19.7
19.8
BURNER REMOVAL ...................................................................................................................................................................................................................... 66
CLEANING THE HEAT EXCHANGER .......................................................................................................................................................................................... 66
DRAINING BOILER SYSTEM ........................................................................................................................................................................................................ 66
REFILLING THE SYSTEM ............................................................................................................................................................................................................. 67
OTHER CHECKS ............................................................................................................................................................................................................................ 67
20.0
SMART SYSTEM CONTROL SETTINGS ............................................................................................................................................................................................. 68
20.1
DISPLAY PANEL ACCESS MENU ................................................................................................................................................................................................ 68
20.2
PARAMETER SETTING ................................................................................................................................................................................................................. 69
21.0
VIEWABLE AND CHANGEABLE CONTROL PARAMETERS ........................................................................................................................................................... 73
21.1
GENERAL ....................................................................................................................................................................................................................................... 73
21.2
TEMPERATURE SETTINGS .......................................................................................................................................................................................................... 74
21.3
DATA LOGGING ............................................................................................................................................................................................................................. 75
21.4
FUNCTIONS ................................................................................................................................................................................................................................... 75
21.5
DHW SETTINGS ............................................................................................................................................................................................................................. 76
21.6
OUTDOOR RESET ......................................................................................................................................................................................................................... 78
21.7
ANTI-CYCLING ............................................................................................................................................................................................................................... 80
21.8
RAMP SETTINGS ........................................................................................................................................................................................................................... 81
21.9
CONTROL MODES ........................................................................................................................................................................................................................ 81
21.10
BUILDING MANAGEMENT SYSTEM (BMS) ......................................................................................................................................................................... 83
21.11
CIRCULATION PUMPS .......................................................................................................................................................................................................... 85
21.12
SERVICE NOTIFICATION ...................................................................................................................................................................................................... 86
21.13
BASIC SETUP ......................................................................................................................................................................................................................... 87
22.0
ErP DATA TABLE .................................................................................................................................................................................................................................. 88
23.0
USER INSTRUCTIONS .......................................................................................................................................................................................................................... 89
23.1
GENERAL REQUIREMENTS ......................................................................................................................................................................................................... 89
23.2
PROCEDURE FOR LIGHTING ...................................................................................................................................................................................................... 89
23.3
PROCEDURE FOR SHUTTING DOWN ........................................................................................................................................................................................ 89
23.4
SMART SYSTEM CONTROL ......................................................................................................................................................................................................... 90
23.5
TEMPERATURE ADJUSTMENT PROCEDURE ........................................................................................................................................................................... 90
23.6
MAINTENANCE .............................................................................................................................................................................................................................. 91
23.7
AIR SUPPLY ................................................................................................................................................................................................................................... 91
23.8
ENTERING DISPLAY ACCESS USER PASSWORD ................................................................................................................................................................... 91
23.9
PARAMETER SETTINGS............................................................................................................................................................................................................... 91
3
1.0
INTRODUCTION

The Lochinvar Herald range is a floor standing gas fired condensing boiler. The equipment comprises a
stainless steel radial burner assembly and a heat exchanger that permits fully condensing operation.

The burner is initiated by a full electronic ignition sequence control that incorporates a spark ignition and a
flame rectification device for supervision of the flame.

The output from the boiler is regulated by a variable speed combustion fan and gas/air ratio controls to maintain
the correct combustion at all levels of modulation. This configuration allows modulation down to 20% of the
rated output.

For the correct operation of the boiler, it is essential that a suitably sized pump is utilised to maintain a constant
water flow rate through the heat exchanger. A suitable shunt pump is available as an ancillary option from
Lochinvar Ltd. See section 14.2.2

This equipment is intended for use on Group H Natural Gas (2 nd Family) and LPG propane (3rd Family). The
information relating to propane firing is to be found in Section 18.0: LPG FUEL. This equipment MUST NOT
use gas other than that for which it has been designed and adjusted.

This equipment must be installed by a competent person, registered with a H.S.E. approved body. All
installations must conform to the relevant Gas Safety and Building Regulations. Health &amp; Safety requirements
must also be taken into account when installing any equipment. Failure to comply with the above may lead to
prosecution.

If the equipment is to be connected to an unvented (pressurised) system, care must be taken to ensure all
extra safety requirements are satisfied should a high or low-pressure condition occur in the system.

The equipment is designed for direct connection to a flue system.

Ancillary Options:





Primary shunt Pumps
DHW vessel sensor
Outside sensor for direct weather compensation of boiler
Con-X-Us Remote Monitoring App
Pressurisation Unit
o Wall mounted – single pump
o Wall mounted – twin pump
Condensate Neutralisation Kit
Low Velocity Header
Flue System Components
Plate system separator
ModBus Interface Module
BACnet Interface Module





See section 14.2.2
LL200009A
LL200010A
LL100071724
CHCWM1
CHCWM2
KIT2000
Contact Lochinvar Limited
See flue assemblies guide
Contact Lochinvar Limited
LL100297842
LL100297828
4
2.0
SAFETY GUIDELINES
READ AND UNDERSTAND THE INSTRUCTIONS
Read and fully understand all instructions before attempting to operate maintain or install the
unit.
Keep these instructions near the Boiler for quick reference.
This equipment must be installed by a competent person, registered with the H.S.E. approved body. All installations
must conform to the relevant Gas Safety and Building Regulations. Health &amp; Safety requirements must also be
taken into account when installing any equipment. Failure to comply with the above may lead to prosecution
Without written approval of the manufacturer the internals of the boiler may not be changed. When changes are executed
without approval, the boiler certification becomes invalid.
Commissioning, maintenance and repair must be done by a skilled installer/engineer, according to all applicable
standards and regulations.
2.1 GENERAL DESCRIPTION OF SAFETY SYMBOLS USED
BANNED
A black symbol inside a red circle with a red diagonal indicates an action that should not be
performed
WARNING
A black symbol added to a yellow triangle with black edges indicates danger
ACTION REQUIRED
A white symbol inserted in a blue circle indicates an action that must be taken to avoid risk
ELECTRICAL HAZARD
Observe all signs placed next to the pictogram. the symbol indicates components of the unit
and actions described in this manual that could create an electrical hazard.
HOT SURFACES
The symbol indicates those components with a high surface temperature that could create a
risk.
This symbol shows essential information which is not safety related
Recover or recycle material
5
2.2 WHAT TO DO IF YOU SMELL GAS
Warning if you smell gas







No naked flames, no smoking!
Avoid causing sparks, do not switch on or off electrical equipment or lights
Open windows and doors
Shut off the main gas supply
Warn occupants and leave the building
After leaving the building alert the local gas supply company
Do not re-enter the building until it is safe to do so
Lochinvar limited is not liable for any damage caused by inaccurately following these
mounting instructions. Only original parts may be used when carrying out any repair or
service work.
This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety. Children should be supervised to ensure that they do not play with the appliance.
6
3.0
ITEM
1
2
PRINCIPAL PARTS
DESCRIPTION
Stainless steel heat
exchanger
Heat exchanger access
cover
3
Fan
4
Gas valve
5
Venturi
6
Flue gas sensor
FUNCTION
Allows water to flow through specially designed coils for maximum heat transfer, while providing protection
against flue gas corrosion. The coils are encased in a jacket that contains the combustion process.
NOTE
Not Shown in 3.1.2
Not Shown in 3.1.2
Allows access to the combustion side of the heat exchanger coils.
The fan pulls in air and gas through the venturi (item 5). Air and gas mix inside the fan and are pushed into
the burner, where they burn inside the combustion chamber.
The gas valve senses the negative pressure created by the fan, allowing gas to flow only if the gas valve is
powered and combustion air is flowing.
The venturi controls air and gas flow into the burner.
This sensor monitors the flue gas exit temperature. The control module will modulate and shut down the boiler
if the flue gas temperature gets too hot. This protects the flue pipe from overheating.
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
9
Boiler outlet temperature
sensor
Boiler inlet temperature
sensor
Electronic display
10
Flue pipe adapter
11
Burner
12
Water outlet
13
Water inlet
14
Gas connection pipe
15
SMART Control Module
16
Manual air vent
17
Allows for the connection of the air intake pipe to the boiler.
23
Air intake adapter
Mains voltage junction
box
Boiler drain port
Low voltage connection
board
Low voltage wiring
connections (knockouts)
Condensate drain
connection
Access cover - front
24
Ignition electrode
Provides direct spark for igniting the burner.
Not Shown in 3.1.2
25
Flame inspection window
The quartz glass window provides a view of the burner surface and flame.
Not Shown in 3.1.2
26
Gas shutoff valve
Not Shown in 3.1.2
27
High limit sensor
28
30
Flame sense electrode
Mains voltage wiring
connections (knockouts)
Top panel
Manual valve used to isolate the gas valve from the gas supply.
Device that monitors the outlet water temperature. If the temperature exceeds its setting, it will break the
control circuit, shutting the boiler down.
Used by the control module to detect the presence of burner flame.
31
Power switch
7
8
18
19
20
21
22
29
32
Not Shown in 3.1.2
This sensor monitors boiler outlet water temperature.
Not Shown in 3.1.2
This sensor monitors return water temperature.
The electronic display consists of 7 buttons and a dual line 32-character liquid crystal display.
Not Shown in 3.1.2
Allows for the connection of the flue system to the boiler.
Made with metal fibre and stainless steel construction, the burner uses pre-mixed air and gas and provides a
wide range of firing rates.
BSP water connection that supplies hot water to the system, either 1-1/4&quot; or 2&quot;, depending on the model.
BSP water connection that returns water from the system to the heat exchanger, either 1-1/4&quot; or 2&quot;, depending
on the model.
Threaded pipe connection, 1/2 “, 3/4&quot;, or 1&quot;, depending on the model. This pipe should be connected to the
incoming gas supply for the purpose of delivering gas to the boiler.
The SMART Control responds to internal and external signals and controls the fan, gas valve, and pumps to
meet the demand.
Designed to remove trapped air from the heat exchanger coils.
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
The junction box contains the connection points for the mains voltage power and all pumps.
Location from which the heat exchanger can be drained.
The connection board is used to connect external low voltage devices.
Not Shown in 3.1.2
Conduit connection points for the low voltage connection board.
Connects the condensate drain line to a 1/2&quot; PVC union.
Provides access to the gas train and the heat exchanger.
Not Shown in 3.1.2
Not Shown in 3.1.2
Conduit connection points for the mains voltage junction box
Removable panel to gain access to the internal components.
Turns 230 VAC ON/OFF to the boiler.
Used to allow the heat exchanger to be levelled. This is needed for the proper draining of the condensate
Levelling legs
from the combustion chamber
3.1.1
PRINCIPLE PARTS LIST, TO BE USED IN CONJUNCTION WITH 3.1.2
Not Shown in 3.1.2
7
3.1.2
PRINCIPLE PARTS TO BE USED IN CONJUNCTION WITH TABLE 3.1.1
8
4.0
TECHNICAL DATA
Model Number
HCB46CE
HCB61CE
HCB86CE
GENERAL DATA
Product I.D. Number
CE 0063 CQ3351
Classification
112H31B/P
Input (gross)
kW
44
61.5
83.5
Input (net)
kW
39.6
55.4
75.2
Output (50&ordm;/30&ordm;)
kW
41.2
58.7
79.7
Output (80&ordm;/60&ordm;)
kW
38.5
53.2
71
Seasonal Efficiency
%
96.4
95.6
96
Shipping Weight
kg
75
79
102
mg/kWh
39
39
39
NOX @0%O2
GAS DATA – G20
Nominal gas inlet pressure
mbar
20
Maximum gas inlet pressure
mbar
25
Minimum gas inlet pressure
mbar
17.5
Gas flow rate
m3/hr
4.2
5.9
8
Flue gas mass rate (@ 9.0% CO2)
g/sec
16
22.3
30.4
Gas inlet connection size
“ BSP
&frac12;
&frac12;
&frac34;
GAS DATA – G31
Nominal gas inlet pressure
mbar
37
Maximum gas inlet pressure
mbar
45
Minimum gas inlet pressure
mbar
27
m3/hr
Gas flow rate –
m3/hr
1.7
2.3
3.1
Flue gas mass rate (@ 10.5% CO2)
g/sec
16.7
23.2
31.6
Gas inlet connection size
“ BSP
&frac12;
&frac12;
&frac34;
W
120
144
180
ELECTRICAL DATA
Power consumption
Power supply
Single phase 230v/50Hz
Protection class
IP00
WATER DATA
Water content
litres
Water connections (F &amp; R)
“ BSP
Max. water pressure (PMS)
bar
11
Min. water pressure
bar
0.5
Maximum water temperature
&deg;C
80
4.1.1
4.9
6.4
1&frac14;
9.1
2
TECHNICAL DATA TABLE
9
5.0
DIMENSIONS AND CLEARANCES
5.1 DIMENSIONAL DRAWINGS
Note full dimensional drawings showing connection sizes and positions are available from Lochinvar technical support
5.1.1
DIMENSIONAL DRAWING MODEL HCB46CE-HCB61CE
5.1.2
DIMENSIONAL DRAWING MODELS, HCB86CE
Model
Dimension
Unit
HCB46CE
HCB61CE
HCB86CE
A
mm
845
845
1080
B
mm
457
565
502
C
mm
701
701
641
D
mm
394
394
394
10
5.2 CLEARANCES
5.2.1
ENCLOSURE INSTALLATION CLEARANCES (MM)
5.2.2
PLANT-ROOM INSTALLATION CLEARANCES (MM)
11
6.0
GENERAL REQUIREMENTS
The Lochinvar Herald condensing boiler has been designed to operate trouble free for many years. These instructions
should be followed closely to obtain the maximum usage and efficiency of the equipment.
READ AND UNDERSTAND THE INSTRUCTIONS
Read and fully understand all instructions before attempting to operate maintain or install the
unit.
6.1 RELATED DOCUMENTS
It is law that all gas appliances are installed by competent persons, in accordance with The Gas Safety (Installation and
Use) Regulations 1998. Failure to install appliances correctly could lead to prosecution. It is in your own interest, and
that of safety, to ensure that this law is complied with.
The installation of the equipment MUST be in accordance with the relevant requirements of the Gas Safety Regulations,
Building Regulations, I.E.E. Regulations and the bylaws of the local water undertaking. The installation should also be
in accordance with any relevant requirements of the local gas distributor and local authority.
In addition, the installation should follow the relevant guidance offered in the following documents. It is not practical to
list all relevant information but emphasis is placed on the following documents, as failure to comply with the guidance
given will almost certainly result in an unsatisfactory installation:
Regulation
Description
BS EN 1858: 2008 + A1:
2011
Chimneys, Components. Concrete flue blocks.
BS 5440-1: 2008
Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net (1st, 2nd and 3rd family gases).
Specification for installation of gas appliances to chimneys and for maintenance of chimneys.
BS 5440-2: 2009
Installation and maintenance of flues and ventilation for gas appliances of rated input not exceeding 70 kW net
(1st, 2nd and 3rd family gases). Specification for installation and maintenance of ventilation for gas appliances.
BS 6644: 2011
Specification for Installation of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net)
(2nd and 3rd family gases).
BS 6700: 2006 +A1: 2009
Design, installation, testing and maintenance of services supplying water for domestic use within buildings and
their curtilages.
BS 6880: 1988 Parts 1, 2 and
3
BS 7074: 1989 Parts 1 and 2
BS 7671: 2008 + A3:2015
BS 7671: Amendment 2:
August 2013
BSEN
12828:2012+A1:2014
CP 342 (Part 2 1974):
Code of practice for low temperature hot water systems of output greater than 45 kW.
Application, selection and installation of expansion vessels and ancillary equipment for sealed systems.
Requirements for electrical installations, I.E.E. wiring regulations seventeenth edition.
Heating systems in buildings. Design for water-based heating systems.
Code of practice for centralised hot water supply-buildings other than dwellings.
IGE/UP/1 - Edition 2:
Institute of Gas Engineers and Managers (IGEM) Publications
Installation pipework on industrial and commercial premises.
IGEM/UP/2 – Edition 3:
Gas installation pipework, boosters and compressors on industrial and commercial premises.
IGEM/UP/4 - Edition 4:
Commissioning of gas-fired plant on industrial and commercial premises.
IGEM/UP/10 - Edition 4:
Installation of flued gas appliances in industrial and commercial premises.
Gas Safety (Installation and Use) Regulations 1998
CIBSE: Guides
Part A Environmental Design
Part G Public health engineering
H.S.E. guidance
INDG 436 Safe management of industrial steam &amp; hot water boilers
SAFED BG01Guidance on safe operation of boilers
Third edition of the 1956 Clean Air Act Memorandum on Chimney Heights
Manufacturer's notes must not be taken in any way as overriding statutory obligations.
12
7.0
WATER QUALITY
The Lochinvar Herald contains a stainless steel heat exchanger; therefore, care must be exercised to ensure that the
system water and any water treatment are compatible. Whenever a new boiler is connected to an existing system, the
pipework must be thoroughly cleaned and flushed to remove debris, rust particles, carbonate deposits and any existing
water treatment that might be incompatible with the heat exchanger. If the existing system is in poor condition and/or
cannot be pressurised, then consideration should be given to using a Plate system separator. See Section 13.3.2 for
details, new systems must also be thoroughly flushed to remove debris and flux deposits.
Failure of the heat exchanger due to deposits in the water are not covered under the boiler
warranty. For advice on system treatment or separation contact Lochinvar technical support.
Whilst chemical inhibitors remove oxygen from the water, due to uncertainty in dosing levels, there is the possibility that
the inhibitor will eventually be diluted to the point where it is no longer effective. To ensure there is effective air
separation and removal, an air separator should be fitted to the hottest part of the system, in accordance with the item
manufacturer’s instructions. In addition to this a means of dirt removal (e.g. dirt separator or strainer) should be fitted
to the boiler return pipework to prevent the accumulation of debris within the heat exchanger coils.
The use of chemical inhibitors alone will not satisfy the terms of the heat exchanger warranty.
8.0
LOCATION
8.1 PLANT ROOM REQUIREMENTS
The Lochinvar Herald may only be installed in a room that complies with the appropriate ventilation requirements.
The Lochinvar Herald can be used as a type C13, C33, C43 or C53 (room sealed) appliance. Due to its room sealed
design, ventilation allowances for combustion air are not necessary, provided the minimum clearances and service
clearances as detailed in
PLANT-ROOM INSTALLATION CLEARANCES (mm) are observed. If the appliance is to be installed in a
compartment or a hot environment, the minimum clearances detailed in
ENCLOSURE INSTALLATION CLEARANCES (mm) should be observed. In addition to this, ventilation for cooling
purposes must be fitted. For further guidance, please refer to Section on AIR SUPPLY or to BS5440-2 or BS6644 as
appropriate.
The Lochinvar Herald can also be used as a type B23 (open flue) appliance. If such a configuration is to be used, then
appropriate ventilation for cooling and combustion must be provided. For further details, please refer to Section on
AIR SUPPLY or to BS5440-2 or BS6644 as appropriate.
8.2 GENERAL REQUIREMENTS
Corrosion of the heat exchanger coils and flue system may occur if air for combustion contains certain chemical vapours.
Such corrosion may result in poor combustion and create a risk of asphyxiation. Aerosol propellants, cleaning solvents,
refrigerator and air conditioning refrigerants, swimming pool chemicals, calcium and sodium chloride, waxes and
process chemicals are corrosive. Products of this sort should not be stored near the boiler or outside by the air intake
(if applicable). The fitting of this equipment in a situation where aerosols or other chemicals may be entrained into the
combustion air will invalidate the warranty.
The equipment must be installed on a level surface that is capable of adequately supporting its weight (when filled with
water) and any ancillary equipment. The operation of the equipment must not cause the temperature of any combustible
material in the vicinity of the equipment and its flue to exceed 65&deg;C. If such a situation is unavoidable, appropriate
insulation should be provided.
Locate the equipment so that if the appliance or any connecting pipework should leak, water
damage will not occur. When such locations cannot be avoided it is recommended that a
suitable drain pan be installed under the equipment. The pan should be adequately drained but
must not restrict the combustion or ventilation airflow.
13
8.3 CLEARANCES
The location chosen for the equipment must permit the provision for a satisfactory flue system and, where necessary,
an adequate air supply. The location must also provide adequate space for servicing and air circulation around each
unit. This includes any electrical trunking laid across the floor and to the appliance.
See
PLANT-ROOM INSTALLATION CLEARANCES (mm)
For dimensions/clearances. Further details regarding locations are given in BS5440 or BS6644 as appropriate.
8.4 CONDENSATE DRAIN
The condensate drain is located on the left hand side of the boiler. It is fitted with a &frac12;” PVC tee and union, this should
be connected to an appropriate condensate drain, sloping continuously away from the boiler at an angle of at least 3
(50mm per metre).
The Water Resources Act requires that trade effluent is discharged to municipal sewers between pH 6.5 and 10.0. If it
is determined that these levels cannot be achieved, an in-line condensate neutralisation kit is available from Lochinvar
Limited. This unit is capable of neutralising 4000 litres of condensate to a pH of 7.0 before releasing it to a drain.
9.0
GAS SUPPLY
The Lochinvar Herald range is suitable for use on second and third family gasses 2H - G20 - 20mbar and 3P - G31 37mbar. For details relating to Propane (3P) please refer to Section on LPG FUEL:
9.1 SERVICE PIPES
The local gas distributor must be consulted at the installation planning stage in order to establish the availability of an
adequate supply of gas. An existing service pipe must not be used without prior consultation with the local gas
distributor.
9.2 METERS
A new gas meter will be connected to the service pipe by the local gas distributor contractor. An existing gas meter
should be checked, preferably by the gas distributor, to ensure that it is adequate to deal with the rate of gas supply
required.
9.3 GAS SUPPLY PIPES
Supply pipes must be fitted in accordance with IGE/UP/2. Pipework from the meter to the equipment must be of
adequate size. The complete installation must be purged and tested as described in IGE/UP/1. Refer to Section on
LPG FUEL for information on LPG pipework installation guidance.
9.4 BOOSTED SUPPLIES
Where it is necessary to employ a gas pressure booster, the controls must include a low-pressure cut-off switch at the
booster inlet. The local gas distributor must be consulted before a gas pressure booster is fitted. For details of how to
connect a low-pressure cut-off switch, please refer to Section 15.0
9.5 PLANT-ROOM CONTROL VALVE
A manual valve for plant-room isolation must be fitted in the gas supply line. It must be clearly identified and readily
accessible for operation, preferably by an exit.
14
EQUIPMENT GAS SYSTEM LEAK CHECK
An approved gas-inlet appliance isolating valve and union should be installed for each unit in a convenient and
safe position and be clearly marked. Ensure that the gas-inlet appliance isolating valve is in the OFF position.
Although the equipment receives a gas leak check and gas train component integrity check prior to leaving the factory,
transit and installation may cause disturbance to unions, fittings and components. During commissioning a further test
for tightness should be carried out on the equipment gas pipework and components.
Care must be taken not to allow leak detection fluid on or near any electrical parts or
connections.
15
10.0 FLUE SYSTEM
All versions of the Herald Condensing boiler can be installed as either type B23 (fan assisted open flue) or C13, 33,
C53 (room sealed) appliances. See the relevant section for details of each flue type and requirements. Standard flue
kits are available as an ancillary item, these include the standard pieces to start the flue system, additional elbows,
extensions will probably be required depending upon site installation requirements. Further information including part
numbers is available in the separate flue guide available from www.lochinvar.ltd.uk
10.1
FLUE SYSTEM GENERAL REQUIREMENTS
Install the horizontal flue components with an angle of 3&deg; back in the direction of the boiler
(roughly equal to five centimetres for every linear meter). Failure to install the flue correctly will
result in a build-up of condense within the flue pipework that will cause early component failure.
When using a wall terminal, there is the possible risk of ice building-up on surrounding
parts/structures, because the condensate will freeze. This risk should be taken into account
during the design phase of the heating installation.
Herald boilers will produce large condense clouds especially during cold weather,
consideration must be taken as to whether this will cause a nuisance to neighbouring
properties and if so alternative flue arrangements used.
Herald boilers can operate with very low flue temperatures; as such the flue system used must
be suitable for use with condensing appliances made from either Polypropylene or stainless
steel and have a temperature class of T120.
Aluminium flue pipe must not be used on this appliance as it may lead to premature failure of
the heat exchanger and will invalidate the warranty.
Before installation of any flue system read the installation manual carefully for both the
appliance and flue system to be used. Information on the flue system Supplied by Lochinvar
can be found within this manual.
Detailed recommendations for the flue system are given in BS5440-1 for equipment of rated input not exceeding 70kW
net, BS6644 for equipment above 70kW net and IGE/UP/10 for equipment of rated input above 54kW net. The following
notes are intended to give general guidance only.
16
10.2
FLUE SYSTEM TECHNICAL DETAILS
Model Number
HCB46CE
HCB61CE
HCB86CE
FLUE DATA TYPE B23
Nominal flue diameter
mm
Maximum flue gas temp
&deg;C
120
Maximum equivalent length
m
60
Equivalent length 90 bend
mm
1000
Equivalent length 45 bend
mm
500
Flue gas temperature
&deg;C
70
mbar
-0.03 to -0.1
Flue draught requirements
80+/-0.6
100+/-0.6
FLUE DATA TYPE C13 &amp; C33
Nominal flue diameter
mm
80/125
100/150
Maximum flue gas temp
&deg;C
120
Maximum equivalent length
m
30
Equivalent length 90 bend
mm
1000
Equivalent length 45 bend
mm
500
FLUE DATA TYPE C43 &amp; C53
Nominal flue diameter
mm
Average flue gas temp (80/60 Flow/Return)
&deg;C
70
Maximum flue gas temp
&deg;C
120
Maximum equivalent length
m
60*
Equivalent length 90 bend
mm
1000
Equivalent length 45 bend
mm
500
10.2.1
*
80
100
FLUE SYSTEM TECHNICAL DATA TABLE
On twin pipe systems, the maximum equivalent length is the sum of the air inlet components and the
exhaust components.
10.3
FLUE DISCHARGE
The flue system must ensure safe and efficient operation of the equipment to which it is attached, protect the combustion
process from wind effects and disperse the products of combustion to open external air.
The flue must terminate in a freely exposed position and be so situated as to prevent the products of combustion
entering any opening in a building.
Under certain operating and weather conditions, the Herald boiler may generate a plume at the terminal. Consideration
should be given to the nuisance this may cause and the terminal should be sited accordingly.
For further information on terminal locations, please see Section 10.4.1
10.4
CONDENSATE DRAIN
If the flue system rises at an angle of at least 3 (50mm per metre), no additional condensate drain will be required.
Failure to provide an adequate rise in the flue system may lead to pooling of condensate which may lead to premature
failure of the flue system.
17
10.4.1
Location
FLUE TERMINAL POSITIONS
Description
HCB46CE – HCB61CE
HCB86CE
A
Directly below an opening, air brick, opening windows etc.
300
2000
B
Above an opening, air brick, opening windows etc.
300
1000
C
Horizontally to an opening, air brick, opening windows etc.
300
1000
D
Below a gutter or sanitary pipework
75
75
E
Below the eaves
200
200
F
Below a balcony or car port roof
200
200
G
From a vertical drain or soil pipe
150
150
H
From an internal or external corner
300
300
I
Above ground, roof or balcony level
300
300
J
From a surface facing the terminal
600
1000
K
From a terminal facing the terminal
1200
2000
L
From an opening in the car port (e.g. door, window) into the dwelling
1200
1200
M
Vertically from a terminal on the same wall
1500
1500
N
Horizontally from a terminal on the same wall
300
600
P
From a vertical structure on the roof
300
300
Above intersection with the roof
FLUE TERMINAL POSITION MINIMUM DISTANCES
300
300
Q
10.4.2
18
10.5
APPROVED FLUE SYSTEM
For Concentric and Twin pipe flue systems only the Lochinvar supplied M&amp;G flue system must
be used
The approved flue system is not suitable for use external to the building. If external routes
cannot be avoided, a flue system manufacturer should be consulted to supply a suitable
alternative.
10.6

INSTALLATION PRECAUTIONS
The approved flue system is rated to 120C max. To prevent the exhaust temperature exceeding this, the
appliance is supplied with a flue gas temperature sensor.
This must be fitted during the installation of the flue system. Failure to do so may lead to
severe personal injury, death or substantial property damage.
The Boiler must not be operated unless the complete flue system is installed. This includes
the Boiler connections, concentric adaptor (if required) flue pipes, air ducts (if required) and
terminals. If discharging at low level, a suitable flue guard must be installed.
During assembly precaution should be taken to ensure that the internal sealing ring is seated
correctly.
Due to the close tolerances in the flue system, it may be necessary to use a twisting action to
fit the joints together. No lubrication other than water should be used.
19
10.1
ROOM SEALED (TYPE C) FLUE ASSEMBLY
In order to install the Herald boiler with a type C (room sealed) flue system a flue transition kit must first be installed,
this kit is used for both C13 (horizontal) and C33 (vertical) flue systems. The information in this paragraph describes
these flue transition kits and there installation.
10.2
10.2.1
INSTALLATION OF FLUE TRANSITION KIT TO HCB46CE-HCB61CE BOILERS
FLUE TRANSITION PARTS HCB46CE – HCB61CE
Depending upon the flue kit chosen either a vertical or a horizontal concentric terminal will be
included in the packaging with the transition kit, additional elbows, flue lengths etc. Further
items are available as ancillaries and may be required to complete the flue system. Additional
wall brackets may be required to ensure the flue system is stable.
For a full list of flue components supplied and optional parts to complete the system see the
herald flue guide available at www.lochinvar.ltd.uk
ITEM NUMBER
1
2
3
4
5
10.2.2
DESCRIPTION
90⁰ ELBOW
SAMPLING POINT
CONCENTRIC ADAPTOR
AIR INTAKE TRANSITION
80mm X 500mm LENGTH
HCB 46CE
3 REQUIRED
1 REQUIRED
1 REQUIRED
1 REQUIRED
CUT TO 270mm
HCB 61CE
3 REQUIRED
1 REQUIRED
1 REQUIRED
1 REQUIRED
CUT TO 270mm
HORIZONTAL CONCENTRIC FLUE TRANSITION PARTS HCB46CE – HCB61CE
20
To install the flue connection to the HCB46CE – HCB61CE boilers the following procedure should be followed:
1.
2.
Check you have all items shown in Section 10.2.1
Check the flue temperature sensor (supplied with the boiler) is securely located into the hole on the exhaust
transition.
If the flue temperature sensor is not fitted, the flue gas may exceed the maximum temperature
rating of the flue and can lead to severe personal injury, death or substantial property damage.
3.
4.
5.
6.
7.
Insert the air intake transition (Item 4) into the intake connection reducer (shown below) and tighten the worm
drive clip.
To the bottom (exhaust) connection of the concentric adaptor fit one of the 80mm 90 elbows, and then fit the
80mm x500mm flue pipe cut to length as in Section 10.2.2.
To the side (intake) connection of the concentric adaptor, fit the remaining 90 elbows.
Fit the Concentric adapter (item 3) to the exhaust flue pipe and air inlet elbows
Fit the flue gas test point (Item 2) and clamp using its locking band.
The completed transition kit should look like the photos shown below.
REAR VIEW TRANSITION KIT HCB46CE-HCB61CE
10.2.3
SIDE VIEW TRANSITION KIT HCB46CE-HCB61CE
TRANSITION KIT FITTED TO APPLIANCE
21
10.3
10.3.1
INSTALLATION OF TRANSITION KIT TO HCB86CE BOILER
FLUE TRANSITION PARTS HCB86CE
Depending upon the flue kit chosen either a vertical or horizontal concentric terminal will be
included in the packaging with the transition kit, additional elbows, flue lengths etc. Further
items are available as ancillaries and may be required to complete the flue system. Additional
wall brackets may be required to ensure the flue system is stable.
For a full list of flue components supplied and optional parts to complete the system see the
herald flue guide available at www.lochinvar.ltd.uk
ITEM NUMBER
1
2
3
4
5
6 (a)
6 (b)
6 (c)
10.3.2
DESCRIPTION
90⁰ ELBOW
45⁰ ELBOW
SAMPLING POINT
CONCENTRIC ADAPTOR
AIR INTAKE TRANSITION
100mm X 500mm LENGTH
100mm X 500mm LENGTH
100mm X 500mm LENGTH
EKW/HCB 86
3 REQUIRED
1 REQUIRED
1 REQUIRED
1 REQUIRED
1 REQUIRED
KEEP 500mm
CUT TO 330mm
CUT TO 330mm
HORIZONTAL CONCENTRIC FLUE TRANSITION PARTS HCB86CE
22
To install the flue connection to the HCB86CE boiler the following procedure should be followed:
1.
2.
Check you have all items shown in Section 10.3.2.
Check the flue temperature sensor (supplied with the boiler) is securely located into the hole on the exhaust
transition.
If the flue temperature sensor is not fitted, the flue gas may exceed the maximum temperature
rating of the flue and can lead to severe personal injury, death or substantial property damage.
3.
4.
5.
6.
7.
Insert the air intake transition (Item 5) into the intake connection reducer and tighten the worm drive clip.
To the bottom (exhaust) connection of the concentric adaptor fit one of the 80mm 90 elbow, then fit the 80mm
x500mm flue pipe cut to length as in Section 10.3.2.
To the side (intake) connection of the concentric adaptor, fit the remaining 90 elbows.
Fit the Concentric adapter (item 3) to the exhaust flue pipe and air inlet elbows
Fit the flue gas test point (Item 2) and clamp using its locking band.
The completed transition kit should look like the photos shown below.
REAR VIEW TRANSITION KIT HCB86CE
10.3.3
SIDE VIEW TRANSITION KIT HCB86CE
TRANSITION KIT FITTED TO APPLIANCE
23
10.4
C13 CONCENTRIC HORIZONTAL FLUE SYSTEMS
Flue system specifications
 MANUFACTURER MUELINK AND GROL (M&amp;G)
 TEMPERATURE CLASS T120
 FLUE GAS MATERIAL PP
Each concentric horizontal flue kit includes the items shown in the tables below
Item No HBHF001
CONCENTRIC HORIZONTAL FLUE ASSEMBLY
MODELS HCB46CE,HCB61CE
COMPONENTS INCLUDED
Item No.
M85291B
M84471B
M75258B
M75256B
M85271B
M84460B
M86934B
M28925B
Description
BEND 90&deg; 80mm PP
SAMPLING POINT &Oslash;80/125mm PP
CONCENTRIC ADAPTER TEE &Oslash;80/80mm - &Oslash;80/125mm PP
AIR INLET TRANSITION &Oslash;80mm ALU
EXTENSION &Oslash;80mm (500mm) PP CUT TO LENGTH
CONCENTRIC BEND 90&deg; &Oslash;80/125mm PP
CONCENTRIC HORIZONTAL TERMINAL &Oslash;80/125mm PP (NO WALL PLATES)
TERMINAL WALL PLATES (PAIR)
Number
1
2
3
4
5
6
7
8
Quantity
3
1
1
1
1
1
1
1
Item No HBHF002
CONCENTRIC HORIZONTAL FLUE ASSEMBLY
MODELS HCB86CE
COMPONENTS INCLUDED
Description
Number
Item No.
M85181B
BEND 90&deg; 100mm PP
1
Quantity
3
M85182B
BEND 45&deg; 100mm PP
2
1
M84421B
SAMPLING POINT &Oslash;100/150mm PP
3
1
M75259B
CONCENTRIC ADAPTER TEE &Oslash;100/100mm &Oslash;100/150mm PP
4
1
M75257B
AIR INLET TRANSITION &Oslash;100mm ALU
5
1
M85176B
EXTENSION &Oslash;100mm (500mm) PP CUT TO LENGTH
6
3
M84412B
CONCENTRIC BEND 90&deg; &Oslash;100/150mm PP
7
1
LV310758B
CONCENTRIC HORIZONTAL TERMINAL &Oslash;100/150mm PP
8
1
24
11.0 FLUE TERMINAL INSTALLATION
11.1
TYPE C13 (HORIZONTAL ROOM SEALED)
11.1.1
HORIZONTAL CONCENTRIC ROOM SEALED APPLICATION, MODELS HCB46CE-HCB61CE
11.1.2
HORIZONTAL CONCENTRIC ROOM SEALED APPLICATION, MODELS HCB86CE
When the boiler is installed as a Type C13 (Horizontal concentric) appliance, the flue system should be installed as
follows:
1.
2.
3.
Determine the location of the flue terminal, taking into account minimum distances as detailed in Section
10.4.1 and the relevant British Standards.
Taking care to protect the appliance from debris and dust, drill a hole in the desired location. The diameter
of the hole should be no more than 10mm greater than the diameter of the air supply pipe of the terminal.
Determine the required length of the terminal and cut as necessary.
When determining the required length for the flue terminal, the outer wall plate or rosette
should be flush to the wall. (see 11.1.3 )
Once cut; remove all burrs and sharp edges
4.
Insert the terminal into the drilled hole. The terminal section should be installed level or with a fall to outside
(Max. 10mm per metre) to prevent the ingress of water.
When inserting the terminal, ensure the air intake section is at the bottom.
25
5.
6.
7.
11.1.3
11.2
Fill the void between the terminal and wall with water resistant sealant.
Fit the wall plates or rosette using appropriate fixings.
Install the remainder of the flue system working progressively away from the boiler supporting the pipes as
necessary.
HORIZONTAL TERMINAL INSTALLATION
FLUE TERMINAL GUARDING
If a horizontal flue terminal is to be fitted less than 2 metres from ground level or in a location where it can be touched
from a window, door or balcony, a terminal guard must be fitted.
26
11.3
C33 CONCENTRIC VERTICAL FLUE SYSTEMS
Flue system specifications
 MANUFACTURER MUELINK AND GROL (M&amp;G)
 TEMPERATURE CLASS T120
 FLUE GAS MATERIAL PP
Each concentric horizontal flue kit includes the items shown in the tables below
Item No HBVF001
CONCENTRIC VERTICAL FLUE ASSEMBLY
MODELS HCB46CE,HCB61CE
COMPONENTS INCLUDED
Number
Quantity
M85291B
BEND 90&deg; 80mm PP
1
3
M84471B
SAMPLING POINT &Oslash;80/125mm PP
2
1
M75258B
CONCENTRIC ADAPTER TEE &Oslash;80/80mm - &Oslash;80/125mm PP
3
1
M75256B
AIR INLET TRANSITION &Oslash;80mm ALU
4
1
M85271B
EXTENSION &Oslash;80mm (500mm) PP CUT TO LENGTH
5
1
CONCENTRIC EXTENSION &Oslash;80/125mm(280-395mm) PP TELESCOPIC
6
1
CONCENTRIC VERTICAL TERMINAL &Oslash;80/125mm PP
7
1
Item No.
Description
LV310744B
M86864B
Item No HBVF002
CONCENTRIC VERTICAL FLUE ASSEMBLY
MODELS HCB86CE
COMPONENTS INCLUDED
Item No.
Description
Number
Quantity
M85181B
BEND 90&deg; 100mm PP
1
3
M85182B
BEND 45&deg; 100mm PP
2
1
M84421B
SAMPLING POINT &Oslash;100/150mm PP
3
1
M75259B
CONCENTRIC ADAPTER TEE &Oslash;100/100mm &Oslash;100/150mm PP
4
1
M75257B
AIR INLET TRANSITION &Oslash;100mm ALU
5
1
M85176B
EXTENSION &Oslash;100mm (500mm) PP CUT TO LENGTH
6
3
M84405B
CONCENTRIC EXTENSION &Oslash;100/150 (500mm) PP CUT TO LENGTH
7
1
CONCENTRIC VERTICAL TERMINAL &Oslash;100/150mm PP
8
1
LV310754B
27
11.4
TYPE C33 (VERTICAL ROOM SEALED)
11.4.1
VERTICAL CONCENTRIC ROOM SEALED APPLICATION, MODELS HCB46CE-HCB61CE
11.4.2
VERTICAL CONCENTRIC ROOM SEALED APPLICATION, MODELS HCB86CE
When the boiler is installed as a Type C33 (Vertical Concentric) appliance, the flue system should be installed as follows:
1.
2.
3.
Confirm that the roof flashing is correct for the type of roof through which the terminal is to be installed. (See
11.4.3)
Determine the desired location for the flue terminal, taking into account minimum distances as detailed in
Section 10.4.1 and the relevant British Standards.
Taking care to protect the appliance from debris and dust, drill a hole in the desired location. The diameter
of the hole should be no more than 10mm greater than the diameter of the air supply pipe of the terminal.
The hole should be drilled from the outside to ensure that no damage is done to the roofing
material. Extra care should be taken to ensure that the hole is drilled vertically.
4.
5.
Install the roof flashing and secure as appropriate.
Carefully insert the roof terminal through the roof flashing and hole in the roof.
When inserting the roof terminal do not support or turn the terminal using the cap.
6.
7.
8.
9.
Ensure the terminal is vertical using a spirit level.
Fit the support bracket around the terminal and secure using appropriate fixings. Do not tighten the support
bracket
Install the remainder of the flue system working progressively away from the boiler supporting the pipes as
necessary.
Once the flue system is fully installed, tighten the clamp to secure the terminal in place.
28
11.4.3
VERTICAL TERMINAL ROOF FLASHINGS FOR SYNTHETIC, FLAT AND TILED ROOFS
11.4.4
INSTALLING TERMINAL THROUGH ROOF FLASHING
29
11.4.5
GENERAL CONCENTRIC FLUE SYSTEM INSTALLATION GUIDELINES
The information in this section is for General guidance only and may not fully represent the
installation on site
Do not drill and screw
into flue system
30
Max distance between
brackets
31
32
33
11.5
TYPE C43 (U DUCT)
This appliance can operate on a U-Duct common flue system. The maximum lengths for the interconnecting flue can
be found in Section 10.2.1.
Concrete components of the U-Duct must meet the requirements of BS EN 1858.
Model No.
Nominal Flue
Diameter
Mass Rate @ 100%
Mass Rate @ 23%
Mass Rate @ 100%
Mass Rate @ 23%
(@ 9% CO2) (G20)
(@ 9% CO2) (G20)
(@ 10.5% CO2)
(G31)
(@ 10.5% CO2)
(G31)
HCB46CE
80+/-0.6
16.0g/s
3.7g/s
16.7g/s
3.8g/s
HCB61CE
80+/-0.6
22.3g/s
5.1g/s
23.2g/s
5.3g/s
HCB86CE
100+/-0.6
30.4g/s
7.0g/s
31.6g/s
7.3g/s
11.5.1
FLUE GAS MASS RATES TABLE
11.6
TYPE C53 (TWIN PIPE)
Flue system specifications
 MANUFACTURER MUELINK AND GROL (M&amp;G)
 TEMPERATURE CLASS T120
 FLUE GAS MATERIAL PP
Each Twin-Pipe starter assembly includes the items shown in the tables below
Item No HBTF001
TWIN-PIPE FLUE STARTER ASSEMBLY
Kit contains components to start the connection to the appliance only
MODELS HCB46CE,HCB61CE
COMPONENTS INCLUDED
Item No.
Description
Number
Quantity
M75256B
M85279B
AIR INLET TRANSITION &Oslash;80mm ALU
1
1
SAMPLING POINT &Oslash;80mm PP
2
1
Item No HBTF002
TWIN-PIPE FLUE STARTER ASSEMBLY
Kit contains components to start the connection to the appliance only
MODELS HCB86CE
COMPONENTS INCLUDED
Item No.
Number
Quantity
M75257B
AIR INLET TRANSITION &Oslash;100mm ALU
Description
1
1
M85189B
SAMPLING POINT &Oslash;100mm PP
2
1
34
When installing the boiler as a Type C53 appliance, it should be noted that the terminals must
not be installed on opposite sides of the building.
If the flue temperature sensor is not fitted, the flue gas temperature may exceed the maximum
temperature rating of the flue and can lead to severe personal injury, death or substantial
property damage.
Typical Twin-Pipe flue arrangement HCB46-HCB61CE
Typical Twin-Pipe flue arrangement EKW86CE
35
11.6.1
GENERAL TWIN-PIPE INSTALLATION GUIDELINES
The information in this section is for General guidance only and may not fully represent the
installation on site
36
37
To install a Type C53 terminal or air inlet, the procedure for either a Type C13 (horizontal) or a
Type C33 (vertical) terminal should be followed noting that the annular space of the terminal
should be sealed off.
38
11.7
TYPE B23 (CONVENTIONAL FLUE WITH FAN ASSISTANCE)
When the boiler is installed as a Type B23 appliance, the flue system should be installed in accordance with the flue
manufacturer’s specific instructions.
Item No HBCF001
FAN ASSISTED OPEN FLUE STARTER ASSEMBLY
Kit contains components to start the connection to the
appliance only
MODELS HCB46CE,HCB61CE
COMPONENTS INCLUDED
Item No.
M75256B
Description
AIR INLET TRANSITION &Oslash;80mm ALU
M73039B
AIR INLET GRILLE &Oslash;80mm ALU
M85279B
SAMPLING POINT &Oslash;80mm PP
Number
Quantity
1
1
2
1
3
1
Item No HBCF002
FAN ASSISTED OPEN FLUE STARTER ASSEMBLY
Kit contains components to start the connection to the
appliance only
MODELS HCB86CE
COMPONENTS INCLUDED
Number
Item No.
M75257B
Description
AIR INLET TRANSITION &Oslash;100mm ALU
1
Quantity
1
M86787B
APPLIANCE AIR INLET GUARD &Oslash;100mm
2
1
M85189B
SAMPLING POINT &Oslash;100mm PP
3
1
39
1.Insert the exhaust transition into the exhaust port of the boiler.
2..Insert the flue temperature sensor into the location hole on the exhaust
transition.
If the flue temperature sensor is not fitted, the flue gas may
exceed the maximum temperature rating of the flue and can
lead to severe personal injury, death or substantial property
damage.
3.Insert the air intake into the intake connection and tighten the worm drive clip.
4.Insert the air inlet grill into the air inlet transition. For safety reasons this must
be fitted prior to operating the appliance.
11.7.1
TYPICAL CONVENTIONAL FLUE ARRANGEMENT
P1
P1
W
W
11.8.1
Material
PP
PP
PP
1
1
L20040
O
O
30
40
I of E
Plastics:
enclosure
Resistance to
condensate
T120
T120
Plastics: fire
behaviour
Pressure class
EN 14471
EN 1856-1
Soot
fire
resistance
class
Distance
to
combustible
material
Plastics:
location
Tempera-ture
class
min. eis PP
min. eis RVS
Corrosion
resistance
class
Metal:
liner
specifications
CE string
flue gas
material
European
standard
11.8
C63 CERTIFIED FLUE SYSTEMS
In general, Boilers are certified with their own purpose supplied Concentric or Twin Pipe flue systems, C 63 certified
appliances allow the installer to use other flue systems when installing the Boiler however, they must be of a suitable
minimum standard as per Table below.
C/E
L
C63 FLUE SYSTEM SPECIFICATION
Boiler
HCB46 CE
HCB61 CE
HCB86 CE
dnom
80
80
100
Doutside
80 +/-0.6
80 +/-0.6
100 +/-0.6
dinside
Linsert
50 +20/ -2
50 +20/ -2
50 +20/ -2
Aluminium flue pipe must not be used on this appliance as it may lead to premature failure of
the heat exchanger and will invalidate the warranty.
40
12.0 AIR SUPPLY
The following information is based on single boiler installations only. If more than one boiler is being used, BS5440-2
or BS6644 (as appropriate) should be consulted to calculate the necessary requirements.
12.1
COMBUSTION VENTILATION
When used as a Type C (room sealed) appliance, provided sufficient clearance is provided, ventilation for combustion
is not necessary as the combustion air is ducted directly from outside.
When used as a Type B (open flue) appliance, the combustion air requirements are as follows:
Model
HCB46CE
Gross
Input
(kW)
Net
Input
(kW)
43.9
39.6
Ventilation
(Room)
(cm2)
165
Compartment
Compartment
(Direct to Outside)
High
(cm2)
200
HCB61CE
58.6
52.8
230
265
12.1.1
COMBUSTION VENTILATION REQUIREMENTS HCB46CE – HCB61CE
(To Internal Space)
Low
(cm2)
400
High
(cm2)
400
Low
(cm2)
800
530
530
1060
Plant Room
Enclosure
Input Input
(Gross) (Net)
kW
kW
Low
Medium
High
Model
Summer Use
Summer Use
Summer Use
High
Low
High
Low
High
Low
(cm2) (cm2) (cm2) (cm2) (cm2) (cm2)
HCB86CE
83.5
75.3
152
304
228
380
304
456
12.1.2
COMBUSTION VENTILATION REQUIREMENTS HCB86CE
12.2
Low
Summer Use
High
Low
(cm2) (cm2)
380
760
Medium
Summer Use
High
Low
(cm2) (cm2)
456
836
High
Summer Use
High
Low
(cm2) (cm2)
532
912
COOLING VENTILATION
When used as a type C (room sealed) appliance, installed in a compartment or an enclosure, cooling ventilation should
be provided as follows:
Input
(Gross)
kW
Input
(Net)
kW
HCB46CE
43.9
HCB61CE
58.6
Model
Enclosure/Compartment
Enclosure/Compartment
(Direct to Outside)
(To Internal Space)
Boiler Room
39.6
High
(cm2)
200
Low
(cm2)
200
High
(cm2)
400
Low
(cm2)
400
High
(cm2)
N/A
Low
(cm2)
N/A
52.8
265
265
530
530
N/A
N/A
HCB86CE
83.5
75.3
380
12.2.1
COOLING VENTILATION REQUIREMENTS
380
760
760
152
152
When used as a type B (open flue) appliance, provision for cooling ventilation is included in the combustion ventilation
allowance.
41
13.0 WATER CONNECTIONS
13.1
GENERAL
Adaptors are required to convert the NTP (male) thread on the heat exchanger to BSP (female).
These adaptors can be found in the packing carton. The BSP section of the adaptor is indicated
with blue paint.
The requirements of minimum water flow are given in Section 14.2. Recommendations for the water circulation system
are given in BS6644 and CP 342. The following notes are of particular importance.
1.
It is strongly recommended that a low velocity header be used to separate the primary circuit from the
secondary circuit.
Circulating pipework not forming part of the useful heating surface should be insulated. Cisterns, expansion
vessels and pipework situated in areas exposed to freezing conditions should also be insulated.
Drain valves must be located in accessible positions that will permit draining of the entire system including the
unit and the storage vessel.
Tapping sizes for connection to the system are detailed in TECHNICAL DATA.
Ideally, individual valves should be fitted to each unit to enable isolation from the system. The arrangement
must comply with the requirements of BS6644 and must incorporate a small expansion vessel and correctly
sized safety valve.
2.
3.
4.
5.
A suitably sized low velocity header or plate separator is available from Lochinvar Limited as ancillary item.
13.2
OPEN VENTED SYSTEM ARRANGEMENT
The Lochinvar Herald can be used in an open vented arrangement provided that a vent pipe in accordance with CP
342 or BS6644 as appropriate is fitted. The minimum static head requirement for an open vented system is 0.5 bar.
13.3
SEALED SYSTEM ARRANGEMENT
If a sealed system arrangement is required, a suitable pressurisation unit is available from Lochinvar Limited on request.
Sealed systems should incorporate a safety valve with a lift pressure no greater than the maximum pressure rating of
any component in the heating system. The maximum working pressure of the boiler is 11.0 bar. A suitably sized
expansion vessel should also be fitted to the system in accordance with BS4814.
42
13.3.1
TYPICAL SCHEMATIC, SINGLE BOILER WITH LOW LOSS HEADER
13.3.2
TYPICAL SCHEMATIC, SINGLE BOILER WITH PLATE SYSTEM SEPARATOR
43
14.0 SCHEMATICS
14.1
KEY FOR SCHEMATICS
Lochinvar limited may provide technical advice and guidance to assist with best practice,
optimisation and installation of Lochinvar products; however, we will not be liable for any
duties as designers under construction (design and management regulations 2015). In all
cases where information is provided, the customer must assess and manage risks associated
with the technical information and advice provided.
SYMBOL
IV
LSV
TD
EXV
EV
PRV
NRV
PCP
TS
ZS
HP
AAV
RLY
LVH
DCV
AS
DS
TFL
DESCRIPTION
ISOLATION VALVE
LOCKSHIELD VALVE
TUNDISH
EXPANSION VESSELQ
EXPANSION VALVE
PRESSURE REDUCING VALVE
NON RETURN VALVE
PRIMARY CIRCULATING PUMP
TEMPERATURE SENSOR (VESSEL SENSOR)
ZONE SENSOR
HEATING PUMP
AUTOMATIC AIR VENT
RELAY
LOW VELOCITY HEADER
DOUBLE CHECK VALVE
AIR SEPARATOR
DIRT SEPARATOR
TEMP FILL LOOP
44
14.1.1
TYPICAL INSTALLATION SHOWING MULTIPLE HERALD BOILERS WITH CASCADE CONTROL AND ALTERNATIVE LEADER
DHW WORKING AS A ZONE
45
14.1.1
TYPICAL INSTALLATION SHOWING MULTIPLE HERALD BOILERS WITH CASCADE CONTROL AND ALTERNATIVE LEADER
DHW PRIORITY
46
14.1.2
EXPANSION VESSEL SIZING
The following information is based on a static head of 35mtrs and a cold fill pressure of 3.5bar. If the system has different
parameters, a more detailed calculation will need to be made.
VV=SV*e
0.45
Where:
VV
=
SV
=
e
=
14.1.3
14.2
Vessel Volume
System Volume
Coefficient of Expansion
(See 14.1.3)
Flow Temp.
30
35
40
45
50
55
C
e
0.005
0.006
0.008
0.010
0.012
0.015
Flow Temp.
65
70
75
80
82
85
C
e
0.020
0.023
0.026
0.030
0.031
0.033
COEFFICIENT OF EXPANSION OF WATER AT 3.8 BAR COLD FILL PRESSURE
60
0.017
90
0.037
CIRCULATING PUMPS
A suitable primary pump, sized in accordance with 14.2.1 should be fitted to the inlet to the boiler.
Primary pumps are available from Lochinvar Limited as ancillary items.
ΔT (&deg;C):
13.89
16.67
19.44
22.22
25.00
Model
l/sec
Metre-H20
l/sec
Metre-H20
l/sec
Metre-H20
l/sec
Metre-H20
l/sec
Metre-H20
HCB46CE
0.69
3.90
0.58
3.35
0.50
2.90
0.44
2.59
0.38
2.16
HCB61CE
0.98
5.79
0.81
3.96
0.69
2.77
0.61
2.44
0.54
2.16
HCB86CE
1.32
3.51
1.10
2.77
0.95
2.23
0.83
1.86
0.74
1.52
*Boiler primary system piping based on 6 meters of piping, 4 - 90&deg; elbows, and 2 - fully ported ball valves.
14.2.1
SYSTEM TEMPERATURE RISE CHART (*INCLUDES PRIMARY PIPING)
14.2.2
Model
Primary shunt pump
HCB46CE
LM900139A
HCB61CE
LM900139A
HCB86CE
LM900139A
PRIMARY SHUNT PUMP FOR USE WITH HERALD BOILER RANGE
47
14.3
PRIMARY PIPEWORK HEADER SIZING
The pipework header between the primary Herald Boiler circuit and the secondary heating
circuit must be sized as per the guidance given in this section. Failure to use the correct size
of pipe header will cause operational problems and potential early failure of the boiler; this will
not be covered under the boiler warranty.
If your installation is outside the scope of this guidance, please contact Lochinvar Technical
support before proceeding with the installation.
The tables below show the pipework header sizing required in order to ensure the correct flow rate is maintained
between the Herald boiler primary circuit and the heating secondary circuit. Using the simple schematics shown in
section 14.3.2 size the pipework header (A) shown in blue and pipework header (B) shown in red.
Using the example schematics shown and assuming the Herald Boiler is an HCB46CE in both cases the header would
be sized as:
Single unit = as there is only a single heater there is no common header so all the pipework should be 35mm.
2 units = the common header shown in red (B) should be sized according to the table at 42mm with the pipework
between the header and each individual units shown in blue (A) at 35mm.
PIPEWORK (A) BLUE SIZE
(mm)
MODEL
PIPEWORK (B) RED SIZE (mm)
NUMBER OF HERALD BOILERS
1
2
3
4
HCB46CE
35
35
42
54
HCB61CE
35
42
54
54
HCB86CE
54
54
54
67
14.3.1
PIPEWORK HEADER SIZES
14.3.2
PIPEWORK SCHEMATIC SHOWING PIPEWORK A AND PIPEWORK B
48
15.0 ELECTRICAL SUPPLY
Wiring external to the equipment must be installed in accordance with the I.E.E. Regulations and any local
regulations that apply.
Model
Normal Supply Voltage
External Fuse Rating
Power Consumption
6.0 A
120 W
144 W
180 W
HCB46CE
230V AC
HCB61CE
50 Hz
1 PH
HCB86CE
15.1.1
ELECTRICAL SUPPLY REQUIREMENTS
WARNING: this appliance must be earthed
A suitably competent person must check wiring. Normal supply required is 230 volts ac,
single phase, 50 hz. An isolator with a contact separation of at least 3mm in all poles should
be sited close to the equipment and must only serve that equipment. The double pole
switch must be readily accessible under all conditions
15.2
EXTERNAL CONTROLS
The Herald boiler can be controlled via a BMS system either utilising a simple on/off arrangement or by directly
modulating the output. The boiler has the following inputs/outputs:
 Building Management System (BMS) 0-10VDC analogue input
 Volt-free “burner on” (runtime) signal
 Volt-free “lock-out” (alarm) signal
 0-10V “burner firing rate”
 0-10V “Boiler pump speed”
 0-10V “System pump speed”
 24VAC auxiliary device enable signal (e.g. to start fan dilution system)
The Herald boiler is also compatible with the following control and safety systems allowing the boiler to operate as a
complete standalone system. See the relevant sections within 17.4 for details of programming the various functions
required for a standalone system.
 Room thermostat up to 3no (on/off type)
 System sensor (modulating type)
 Storage vessel thermostat (on/off type)
 Storage vessel sensor (modulating type)
 Internal sequencing control
 Gas pressure switch (e.g. gas booster under pressure/over pressure safety switch)
 Water flow proving device (e.g. differential pressure switch or flow switch)
 Auxiliary safety system proving switch (e.g. fan dilution system proving switch)
15.2.1
REMOTE ENABLING
There are two ways to enable the Herald boiler using a BMS:
1. Using a 0-10V signal via connections 35-36
2. Using a volt free enable signal via connections 21-22
The boiler will still fire on a DHW demand if the Herald is directly controlling the DHW via the
sensor point at 29-30
49
15.3
HIGH VOLTAGE CONNECTOR STRIP
D.H.W.
DHW
L
N
PRIMARY
BOILER
L
N
SECONDARY
230V~50Hz
SYSTEM
L
PUMP OUTPUTS 190 WATTS MAX
15.3.1
N
MAINS
L
N
HIGH VOLTAGE CONNECTION STRIP
The output across the 3 terminals should not exceed 190W per terminal.
It is highly recommended these switched outputs are only used to switch suitable starter
overload relays on the pumps.
CONNECTION
NOTES
DHW
230 VAC Live, Neutral and Earth connections for a DHW primary pump. If the pump rating exceeds 190 watts, the Live and
Neutral connections should be used to energise a suitable contactor.
BOILER
230 VAC Live, Neutral and Earth connections for a boiler shunt pump. If the pump rating exceeds 190 watts, the Live and
Neutral connections should be used to energise a suitable contactor.
SYSTEM
230 VAC Live, Neutral and Earth connections for the primary system pump. If the pump rating exceeds 190 watts, the Live
and Neutral connections should be used to energise a suitable contactor.
MAINS
Connections for a 230V ~ 1 ph 50Hz power supply. NOTE: The power supply cable should be secured using the anchor
supplied.
15.3.2
15.4
15.4.1
HIGH VOLTAGE CONNECTION TERMINAL DETAILS
LOW VOLTAGE CONNECTOR STRIP
LOW VOLTAGE CONNECTION STRIP
50
PIN
CONNECTION
OUTPUT / INPUT
NOTES
1-2
ALARM CONTACTS
Volt free – Close on alarm
An internal volt free contact across pins 1 and 2 will close in the event of the heater locking out.
This connection can be used by a BMS to monitor the operation of the heater.
3-4
RUNTIME
CONTACTS
Volt free – Close when unit
running
An internal volt free contact across pins 3 and 4 will close in the event of the burner operating.
This connection can be used by a BMS to monitor the operation of the heater
5-6
24VAC RECIRC PUMP
RELAY COIL
24VAC Output – when
recirc sensor calls –
switches on Neutral
When the heater gets a call for heat from the DHW RECIRC SENSOR a 24VAC supply will be
sent to a DHW recirculation pump relay (field supplied)
7-8
24VAC LOUVER
RELAY COIL (COM)
24VAC Output – When unit
calls for heat.
When the heater gets a call for heat, a 24VAC supply becomes present on pin 7. Used in
conjunction with the ground pin (pin 8), these terminals can be used to send a signal to energise
an auxiliary device such as a fan dilution system or mechanical ventilation system.
9-10
LOUVER PROVING
SWITCH
24VAC Output – When unit
calls for heat.
If an auxiliary device such as a fan dilution system or mechanical ventilation system is to be
used, the link should be taken out of pins 9 and 10 and the auxiliary deice safety circuit wiring
installed. If there is no continuity across the terminals the heater will not fire.
11-12
GAS PRESSURE
SWITCH
24VAC Output – constant
when unit is powered
If a gas pressure switch is to be used to ensure the incoming gas pressure is correct, the link
should be taken out of pins 11 and 12 and the gas pressure switch wiring installed. If there is no
continuity across the terminals the heater will not fire.
13-14
FLOW SWITCH
24VAC Output – constant
when unit is powered
15-16
TANK THERMOSTAT
24VAC Output – constant
when unit is powered
17-18
HEAT/LOOP DEMAND 3
24VAC Output – constant
when unit is powered
19-20
HEAT/LOOP DEMAND 2
24VAC Output – constant
when unit is powered
21-22
HEAT/LOOP DEMAND 1
24VAC Output – constant
when unit is powered
23-24
SYSTEM SENSOR
Contacts read a resistance
25-26
OUTDOOR SENSOR
Contacts read a resistance
27-28
DHW RECIRC SENSOR
Contacts read a resistance
29-30
TANK SENSOR
24VAC Output – When unit
calls for heat.
31-34
CASCADE
Communication
35-36
BMS IN
0 – 10 V DC input
37-38
SYS PUMP IN
0 – 10 V DC input
39-40
BLR PUMP OUT
0 – 10 V DC output
41-42
RATE OUT
0 – 10 V DC output
43-46
MODBUS/BACNET OPTION
Communication
15.4.2
If a flow switch is to be used to ensure the primary pump is operating, the link should be taken out
of pins 13 and 14 and the flow switch wiring installed. If there is no continuity across the terminals
the heater will not fire.
An on-off type thermostat located in an indirect Calorifier can be connected to terminals 15 and 16
to control the output from the boiler. This connection is not polarity sensitive. Not to be used in
conjunction with the tank sensor.
An on-off type thermostat or modulating room sensor can be connected to terminals 17 and 18 to
control the output from the boiler. This connection is not polarity sensitive. Can also be used for a
BMS 0V enable signal
An on-off type thermostat or modulating room sensor can be connected to terminals 19 and 20 to
control the output from the boiler. This connection is not polarity sensitive. Can also be used for a
BMS 0V enable signal
An on-off type thermostat or modulating room sensor can be connected to terminals 21 and 22 to
control the output from the boiler. This connection is not polarity sensitive. Can also be used for a
BMS 0V enable signal
When configured in a cascade, the Master boiler will use the system sensor to monitor and control
the output from the cascade. This sensor should be mounted in the boiler flow.
If the boiler is to be compensated to the outside temperature, an outdoor sensor should be
connected to pins 25 and 26. This connection is not polarity sensitive.
The heater can control a DHW recirculation pump. A sensor must be installed n the circulation loop
return and connected to terminals 27 and 28.
A sensor located in an indirect Calorifier can be connected to terminals 29 and 30 to control the
output from the boiler. This connection is not polarity sensitive. Not to be used in conjunction with
the tank thermostat
If the heaters are to be operated in a cascade, shielded 2-wire twisted pair communication cable
should be used. The shielding should be connected to pin 31 or 34 and then all “A” terminals (pin
32) should be linked together and all “B” terminals (pin 33) should be linked together.
When the heater is to be controlled by a 0-10V DC analogue output from a Building Management
System (BMS), the 0V line should be connected to pin 35 and the 0-10V line should be connected
to pin 36.
If a variable speed pump is used in the primary loop, and a 0-10V signal is available from the speed
control, this signal can be used to control the modulation of the boiler as primary flow increases or
decreases. The 0-10V line should be connected to pin 37 and the 0V line to pin 38
This 0-10V output is available to control the speed of a variable speed boiler pump in order to
maintain a minimum temperature difference across the heat exchanger. This feature is only to be
used with primary/secondary piping systems and a supply sensor MUST be installed.
Provides a 0-10V signal that is proportional to the firing rate of the heater. This may be used by a
BMS system to monitor the actual rate of the heater.
When an optional ModBus or BACnet interface module is installed the RS-485 cable is connected
to these terminals.
LOW VOLTAGE CONNECTION TERMINAL DETAILS
51
15.5
ELECTRICAL CONNECTIONS
Access to the High Voltage and Low Voltage Connection Strips can be made by removing the appropriate knockouts
on the back panel of the boiler. All connections should be secured using an appropriate cord anchorage. One cord
anchor is supplied with the boiler for securing the mains supply to the unit. If additional controls and ancillaries are to
be used, the appropriate knockout should be removed and an anchor such as RS Components part number 607-897
plus locking nut 607-910 should be fitted.
If a knockout is removed by mistake, the resulting hole must be blocked with an appropriate
anchor, plug or grommet to prevent accidental access to the live parts within the boiler.
15.6
FUSES
F3
F1
F2
The Herald has three internal fuses. All are slow blow fuses, located and rated as follows:
F1
F2
F3
15.6.1
5A
3.15A
80A
FUSE RATINGS AND LOCATIONS
The boiler has three spare fuses in a plastic bag attached to the control module cover. Only replace with an equivalent
rated fuse. Use of non-equivalent fuses or link wires will invalidate the warranty.
15.7
ARC WELDING PRECAUTIONS
The appliance must be isolated from the mains electricity supply in the event of electric arc welding being carried out
on any connecting pipework.
52
15.8
15.8.1
WIRING DIAGRAM
WIRING DIAGRAM
53
15.9
15.9.1
LADDER DIAGRAM
LADDER DIAGRAM
54
16.0 SMART SYSTEM CONTROL
16.1
GENERAL
The Lochinvar Herald uses the SMART SYSTEM control interface. The control panel display gives information on setup, system status and diagnostic data in words rather than codes.
16.2
SMART SYSTEM CONTROL PANEL
1
2
3
4
5
6
1
2
5
3
6
USB Drive
PC Connection
Left select key
Navigation dial
Reset switch
Right select key
4
The information on the bottom of the display shows the functions of the two SELECT keys on both corner, and the
NAVIGATION dial in the centre.
MENU
SETPOINTS
SHDN
Left SELECT key
NAVIGATION dial-pressing down
Right SELECT key
The smart system control face instantly informs the user of the status of the boiler by changing colour according to the
status of the boiler as below.
Normal operation
Service due
Boiler is not working
ACCESS MODES
16.2.1
USER
The user can adjust tank target temperatures by pressing the NAVIGATION dial when “↓SETPOINTS” is flashing at
the bottom of the display. The date, time and the temperature units can also be changed.
16.2.2
INSTALLER
Most parameters are available only for the installer, accessible by entering the installer password.
55
16.3
SAVING PARAMETERS
Please note that the brackets ([]) denote screen status.
16.3.1
TO SAVE PARAMETERS AND EXIT PROGRAMMING
Press the RIGHT SELECT (SAVE) key and then press the RIGHT SELECT (HOME) KEY.
16.3.2
TO ENTER A PARAMETER AND CONTINUE PROGRAMMING
Press the RIGHT SELECT (SAVE) key 1 time to return to the parameter listings, press again to return to the menu
listings. Remember to press the RIGHT SELECT key when programming is completed in order to save the changes
made.
16.3.3
SEQUENCE OF OPERATION
Operation
1
Display
Upon a call for heat , the gas pressure switch(s) must be
closed
Once the gas pressure switch(s) are closed the control turns
2 on the appropriate pumps. The flow switch and or LWCO
must close
3
The control turns on power to the louvre relay, the louvre
proving switch and blocked drain switch must close
4 The control starts the pre-purge cycle by initiating the fan
5
The control starts the trial for ignition by firing the spark
electrode and opening the gas valve
56
If flame is not detected after spark ends the control will
6 perform a post-purge, then start another pre-purge cycle
and try to light the boiler again.
If the flame is detected it holds the firing rate steady for a
few seconds then begins to modulate the firing rate based
7
on a set point or some other command (such as the 0-10v
signal)
If a space heating call for heat is active and the tank
thermostat or sensor starts a DHW call for heat, the boiler
will switch to the DHW mode. The DHW pump will turn on
8
first then the boiler pump will turn off this will divert the
water to the indirect tank coil. The control will modulate to
maintain the DHW set point.
If the boiler is not part of a Cascade and both heating and
DHW calls for heat remain active for long enough the boiler
9
will switch back and forth between the 2 modes until either
heating or the DHW load is satisfied.
Once both calls for heat are satisfied the control will turn off
10 the burner. The fan will continue to run during the postpurge period.
Any pumps that are running will continue for their
respective pump overrun time period before switching off.
11
A 60 second anti-cycle period will start which will delay any
call for heat.
12 In standby ready to start a new cycle.
57
16.4
Section
STATUS DISPLAY SCREENS
Display
Description
STANDBY
The unit has not received a call for heat
START
The unit has received a call for heat and is checking all safety circuits
PREPURGE
The unit has received a call for heat and has initiated a pre-purge period
IGNITION
A (Boiler
status
bar)
The unit has initiated the spark ignition to the main burner
%
POSTPURGE
The unit has fired and is running at the displayed firing rate
The call for heat has ended, the unit runs the fan for a set period to purge the
combustion chamber and vent the system of additional flue products
SHUTDOWN
The unit is in the OFF position
SETPOINT MET
The control temperature has exceeded the set point and offset
The unit has detected a condition that has temporarily interrupted the call for
heat
BLOCKED
B (Call
for heat
indicators
)
1
Room thermostat 1 has called for heat
2
Room thermostat 2 has called for heat
3
Room thermostat 3 has called for heat
DHW tank thermostat or sensor has called for heat
Indicates which room thermostat has priority
The unit is being controlled by a 0-10V BMS signal
The member unit is supplying heat whilst in Cascade mode
Section
Display
DETAILS SCREEN 1
Description
a.
SYSTEM TEMP
b.
TANK TEMP
c.
OUTDOOR TEMP
d.
INLET TEMP
e.
OUTLET TEMP
f.
DHW RECIRC TEMP temperature of DHW recirc sensor if fitted
a.
DELTA T
b.
FLUE TEMP
c.
C(Operational
DETAILS SCREEN 2 d.
Information)
e.
I/O SCREEN
FLAME CURRENT
FAN SPEED
LOOP 1 TEMP
as reported by the MTLC control
f.
LOOP 2 TEMP
as reported by the MTLC control
g.
LOOP 3 TEMP
as reported by the MTLC control
a.
GAS PRESSURE SW
b.
FLOW SW
c.
LOUVRE RELAY
d.
LOUVRE SW
e.
BLOCKED DRAIN
f.
GAS VALVE
58
Section
Display
BMS SCREEN
C(Operatio
nal
information
)
HISTORY
SCREEN
LAST 10
FAULTS
CASCADE
STATUS
NIGHT
SETBACK
Section
D (LEFT
SELECT key
function)
E
(NAVIGATION
dial function)
F (RIGHT
SELECT key
function)
Display
USB
MODIFY
Description
a.
0-10V BMS IN
b.
0-10V BMS OUT
c.
BMS ADDRESS
d.
e.
BMS CONTROL?
SYS PUMP
SPEED
f.
BLR PUMP OUT
a.
SH RUN TIME
total space heating run time
b.
SH CYCLES
total space heating demand cycles
c.
DHW RUN TIME
total DHW running time
d.
DHW CYCLES
total DHW demand cycles
e.
POWER TIME
total time powered on
f.
IGNITIONS
total number of successful ignition attempts
g.
IGN ATTEMPTS
total number of ignition attempts
a.
FAULT NO
b.
FAULT NO
c.
DATE
d.
b.
TIME
CASCADE
STATUS
CASCADE
POWER
c.
PRESENT
a.
TRIGGER 1
next space heating night setback trigger
b.
TRIGGER 2
next DHW night setback trigger
a.
Description
Press the LEFT SELECT key to access the USB and installer menu
Pressing the NAVIGATION dial will allow the installer to change the text
SHDN
Press the RIGHT SELECT key to turn the boiler off
ON
Press the RIGHT SELECT key to turn the boiler on
NO
Press the RIGHT SELECT key to cancel the shutdown operation
SAVE
HOME
Press the RIGHT SELECT key to save the current change
Press the RIGHT SELECT key to return to the Status Screen and upload
parameter changes
59
17.0 COMMISSIONING AND TESTING
17.1
ELECTRICAL INSTALLATION
Notes on the requirements for electrical installation are provided in Section 15.0. A schematic drawing of the control
circuit is shown in Section 15.0: WIRING DIAGRAM.
17.2
GAS INSTALLATION
For design see 9.0: GAS SUPPLY. See Section3.0: for details on the position of the gas connection.
17.3
WATER CONNECTIONS
For design see Section 13.0: WATER CONNECTIONS
The system should be thoroughly flushed out with cold water without any circulating pumps in
position. Ensure all the valves are open.
Check the system for leaks and repair as necessary. If the system is configured in a sealed arrangement, check the
expansion vessel cushion pressure and pressurisation unit settings.
17.4
17.4.1
COMMISSIONING THE EQUIPMENT
GENERAL CHECKS PRIOR TO LIGHTING
A person deemed competent must be responsible for the commissioning of this equipment.
Before attempting to commission any equipment, ensure that personnel involved are aware of
what action is about to be taken and begin by making the following checks:
1.
2.
3.
4.
5.
Flueway passages are clear.
Adequate ventilation exists in the plant room (if necessary).
The system is fully charged with water, ready to receive heat. All necessary valves are open and all allied
pumps are circulating water.
The gas supply pipework is clear of any loose matter, tested for soundness and purged.
The condensate drain is installed correctly and the condensate trap is filled with water.
If the condensate trap is not filled before use, products of combustion may escape and can
lead to severe personal injury or death
17.4.2
EQUIPMENT CHECKS PRIOR TO LIGHTING
This unit has been designed for a nominal gas inlet pressure of 20.0 mbar when used on natural gas.
Information relating to propane firing can be found in Section 18.0: LPG FUEL
1.
2.
Gas supply is connected but turned to the “off” position. Any unions or fittings are correctly tightened, test
points are closed and the flame sense electrode lead is connected correctly. Ensure the ceramic sheath
around the flame sense electrode is not cracked or broken.
Ensure electricity supply is connected.
60
17.4.3
PROCEDURE FOR INITIAL LIGHTING
IF THE UNIT IS TO OPERATE ON LPG REFER TO SECTION 18.0 BEFORE PROCEEDING
1.
2.
3.
4.
5.
6.
17.4.4
Ensure that the external gas-inlet appliance isolating valve, provided by the installer, is in the “off” position.
Press the power rocker switch, positioned on the back of the appliance to bring the equipment on.
The combustion fan should ramp up to full speed to purge the combustion chamber and then drop back to
half rate in order to light. The spark generator should create a spark, visible through the burner sight glass.
As the gas-inlet appliance isolating valve is closed, the controls should go to a flame failure condition after
four ignition attempts. If the above occurs correctly, open the gas-inlet appliance isolating valve and reset
the unit by depressing the Enter/Reset button on the control panel.
The combustion fan will repeat the pre-purge procedure and attempt to light. Once a flame is established,
the LCD display will change to display the rate at which it is firing.
Allow the system to reach temperature to check operation of the control sensors.
Once the appliance has reached temperature and shut down, check that the flame has extinguished.
GAS PRESSURE ADJUSTMENT AND COMBUSTION CHECKS
The lochinvar herald series are supplied with a pre-set gas/air ratio inlet assembly. This
must not be tampered with. Any attempt to adjust the gas valve or venturi will invalidate
the warranty.
Combustion figures should be as follows:
17.4.5
Model No.
CO2
CO
HCB46CE
9.0% 0.5%
&lt;100 ppm
HCB61CE
9.0% 0.5%
&lt;100 ppm
8.8% 0.5%
HCB86CE
NATURAL GAS COMBUSTION FIGURES
&lt;100 ppm
If the combustion figures are not within the range specified, contact Lochinvar Technical support for further guidance.
Combustion figures for Propane firing can be found in Section 18.0: LPG FUEL.
17.5
17.5.1
TEMPERATURE ADJUSTMENT PROCEDURE
CENTRAL HEATING SETPOINT
With the boiler firing, the setpoint can be adjusted using the NAVIGATION dial on the SMART SYSTEM control panel.
When SETPOINT is flashing at the bottom of the display the NAVIGATION dial can be used to set and store the desired
setpoint.
17.5.2
DHW SETPOINT
If the stored water temperature is to be controlled by a thermostat, the setting should be adjusted on the thermostat
itself. If the stored water temperature is to be controlled by a tank sensor, the default setpoint is 52C. a DHW sensor
is available as an ancillary, part number LL200009A.
The setpoint should be adjusted to ensure that the water is stored above 60&deg;C and distributed at 50&deg;C within 1 (one)
minute at all outlets. Care is needed to avoid much higher temperatures because of the risk of scalding. At 50&deg;C the
risk of scalding is small for most people, but the risk increases rapidly with higher temperatures and for longer exposure
times. The risk to young children and to those with a sensory or mobility loss will be greater. Where a significant
scalding risk has been identified, the use of thermostatic mixing valves on baths and showers should be considered to
reduce temperature, these need to be placed as close to the point of use as possible.
17.6
INSTALLATION NOISE
If care has been taken to follow the manufacturer’s instructions, there should be no discernible noise from the
equipment. The allied pump motor may have a level of sound that could lead to consideration for acoustic insulation,
but care must be taken not to impede ventilation or airflow to the pump motor.
61
18.0 LPG FUEL
It is strongly recommended that, on LPG installations, gas detection equipment is fitted. This
equipment should be positioned near the appliance and at low level. It is also important that
the space housing the appliance is adequately ventilated at high and low level. This appliance
must not be located below ground e.g. in a cellar.
18.1
RELATED DOCUMENTS
In addition to those documents listed in Section 5.1: RELATED DOCUMENTS within the main body of the installer’s
guide the gas installation should also comply with the guidance offered in the following documents.
BS 5482-1: 2005
Code of practice for domestic butane and propane gas burning installations.
Part 1: Installations at permanent dwellings, residential park homes and commercial
premises, with installation pipework sizes not exceeding dn25 for steel and dn28 for
corrugated stainless steel or copper.
The operation of the Herald range on LPG-Propane (3rd Family) 3P is similar to that on Natural Gas (2nd Family) 2H and
the design and installation details described in the main body of the installer’s guide should be followed.
18.2
CONVERSION TO LPG
This process must be carried out in the order stated before the boiler is switched on. Failure
to follow the following procedure may lead to non-warrantable damage to the boiler. The
conversion must be carried out be a competent person certified for work on LPG fuel.
In the event of any seal or gasket being broken it is essential that the seal or gasket be
replaced. Contact Lochinvar limited for replacement seals and gaskets.
18.2.1
Model
Part No.
Stamp
Size
HCB46CE
ORF2022
150
4.98  0.025
HCB61CE
ORF2023
210
5.56  0.025
HCB86CE
LPG ORIFICE MARKINGS
ORF2024
285
6.76  0.025
62
If the boiler is already installed and operational, you must turn off the gas supply, turn off the power supply and allow
the boiler to cool before proceeding. The conversion procedure is as follows:
18.2.2
1.
2.
3.
4.
5.
6.
7.
8.
18.2.3
HCB46CE – HCB86CE
Remove the top and front access covers from the unit (no tools required for removal).
Remove the impulse tube and wiring plug from the gas valve.
Remove the three cap-head screws securing the gas valve to the venturi (see CONVERSION PROCEDURE
HCB46CE – HCB86CE).
Locate the propane orifice disk from the conversion kit bag. Verify that the stamping on the orifice disk is
correct for the boiler (see LPG ORIFICE MARKINGS).
Place the orifice into the black rubber grommet in the side of the gas valve ensuring the orifice and grommet
are seated correctly (see CONVERSION PROCEDURE HCB46CE – HCB86CE).
Reposition the gas valve against the venturi and replace the cap-head screws (see CONVERSION
PROCEDURE HCB46CE – HCB86CE).securing the valve to the venturi.
Refit the impulse tube and wiring plug to the gas valve.
After installation is complete, attach the propane conversion label (in the conversion kit bag) next to the boiler
rating plate. Attach the LPG caution label (in the conversion kit bag) to the left side of the unit in the lower
left corner.
9. Replace the top and front access covers.
CONVERSION PROCEDURE HCB46CE – HCB86CE
63
18.3
LPG COMMISSIONING AND TESTING
The commissioning procedure on LPG is similar to that when the boiler is firing on Natural Gas. As such, the same
procedure should be followed taking in to account the following information:
18.3.1
LPG PRESSURE ADJUSTMENT AND COMBUSTION CHECKS
The Lochinvar herald series boilers are supplied with a pre-set gas/air ratio inlet assembly.
This must not be tampered with. Any attempt to adjust the gas valve or venturi will
invalidate the warranty.
Combustion figures should be as follows:
18.3.2
Model No.
CO2
CO
HCB46CE
10.5% 0.5%
&lt;100 ppm
HCB61CE
10.5% 0.5%
&lt;100 ppm
HCB86CE
LPG COMBUSTION FIGURES
10.5% 0.5%
&lt;100 ppm
If the combustion figures are not within the range specified, contact Lochinvar Technical support for further guidance.
64
19.0 MAINTENANCE
19.1
GENERAL
Keep appliance area clear and free from combustible materials and flammable vapours and
liquids.
A competent person should check and ensure that the flue, its support and terminal, the ventilation to the boiler house,
safety valve, drain, pressure gauge etc. are in a serviceable and working condition and still comply with the relevant
standards and codes of practice, as detailed in Section 5: GENERAL REQUIREMENTS.
Servicing is recommended at intervals no greater than 12 months to aid trouble free operation. Even if a maintenance
schedule is determined to be less than annually, it is important that all controls and safety features are checked for
correct operation on an annual basis.
Measuring flue gas CO2 and flue gas temperatures will give an indication of the state of the flue and burner. Results of
the flue gas analysis should be compared with previously measured values to identify any changes in operational
characteristics.
19.2
MAINTENANCE SCHEDULE
The boiler has a built in function that reminds the user that routine maintenance is due. As a default, this is set to 12
months 10,000 operational hours or 10,000 ignition cycles. Lochinvar Limited recommends that this be the maximum
service interval.
19.3
BURNER INSPECTION
The heat exchanger has a sight glass for inspection of the flame picture.
If the appliance has been in recent operation, this area may be hot. Appropriate precautions
should be taken to prevent personal injury.
To check the flame picture at high and low fire, the following procedure should be followed:
1.
2.
3.
4.
5.
6.
7.
Place the boiler into service mode. This is done by depressing the small button below the Enter/Reset button
for 5 seconds.
The boiler should shut down and relight.
Depress the service button momentarily, this should ramp the boiler up to full rate.
Check the flame condition.
Depress the service button momentarily, this should ramp the boiler down to low rate.
Check the flame condition.
Press and hold the service button for 5 seconds to take the unit out of service mode.
65
19.4
BURNER REMOVAL
If it has been determined that the flame picture is unacceptable, the burner can be removed and cleaned using the
following procedure:
1.
2.
3.
4.
5.
6.
Isolate the electrical and gas supplies to the heater.
Allow the boiler to cool down.
Disconnect the wiring connections to the ignition electrode.
Disconnect the power and control connection leads and earthing wire from the combustion fan.
Apply a suitable release oil to the 6 studs around the edge of burner door.
Remove the 6 retaining nuts around the edge of the burner door.
Once loosened, the nuts should be removed by hand. If any of the nuts seize, the nut should
gently be re-tightened and additional release oil used.
7.
8.
Withdraw the heat exchanger front plate and burner assembly from the heat exchanger complete with the
combustion fan.
With the burner assembly away from the boiler, the burner can be gently cleaned with the brush attachment
of a vacuum cleaner.
The reassembly procedure is the reverse of the above taking care to ensure that the for the heat exchanger front plate
sealing gasket, the combustion fan connection gasket, the burner door insulation and the combustion chamber rear
wall insulation are in good condition or are replaced as necessary.
Particular attention should be paid to the combustion chamber rear wall insulation. If any
deterioration in the insulating material is noted, the insulation panel must be replaced.
19.5
CLEANING THE HEAT EXCHANGER
To clean the heat exchanger, the following procedure should be carried out:
1.
2.
3.
4.
5.
6.
7.
19.6
Remove the burner as above.
Use a vacuum cleaner to remove any accumulation on the heating surfaces. Do not use any solvent.
Finish cleaning using a clean cloth dampened with warm water.
Reinstall the burner.
Close isolation valves on piping to isolate the appliance from the system. Attach a hose to the appliance
drain valve and flush the heat exchanger thoroughly with clean water by using purging valves to allow water
to flow through the water make-up line to the appliance.
Once the heat exchanger has been flushed, close the drain valve and open the isolation valves.
Restart the boiler as detailed in Section 17.4.3.
DRAINING BOILER SYSTEM
The boiler must be drained if it is to be shut down and exposed to freezing temperatures. Maintenance and service
procedures may also require draining the boiler.
1.
2.
3.
4.
5.
6.
7.
8.
Turn off the boiler electrical disconnect switch.
Connect a hose to the system drain valve.
Locate hose’s discharge in an area where hot water will not cause any damage or injury.
Close the cold-water inlet valve from the header tank or pressurisation unit to boiler system.
Open the drain valve.
Working systematically from the highest point in the heating system, open bleed valves to allow the
system to drain.
Close all bleed valves
If the boiler is being drained for an extended shutdown, it is suggested the drain valve be left open during
this period.
The heat exchanger cannot be completely drained of water without purging with compressed
air at a pressure of 1 bar.
66
19.7
1.
2.
3.
4.
5.
19.8
REFILLING THE SYSTEM
Close the drain valve.
Open the cold-water inlet valve from the header tank or pressurisation unit to boiler system.
Working systematically towards the highest point in the system, open all bleed valves and allow any
trapped air to escape.
Follow the lighting instructions as detailed in Section 17.4.3.
Check for water leakage and airlocks, remedy as necessary.
OTHER CHECKS
19.8.1 AIR PRESSURE SWITCH LINES
During the annual service, check the lines to/from the air pressure switch to ensure:
1. They are correctly fitted
2. There is no damage
Check all connections
19.8.2
RELIEF VALVE
At least once a year, the pressure relief valve should be checked to ensure correct operation. To check the valve, the
manual override lever should be operated several times. The valve should seat properly and operate freely.
If water does not flow, drain the boiler, remove the inoperative valve and inspect for obstructions or corrosion. Replace
with a new valve of equivalent size as necessary.
19.8.3
FLUE SYSTEM
Examine the exhaust and air intake system at least once a year. Points of inspection are as follows:
1.
2.
3.
4.
19.8.4
Check for obstructions and/or deterioration of flue piping and terminal. Replace immediately where
needed.
Check the terminal for any foreign material and remove as necessary.
Check all flue system connections for leakage and reseal as required.
Check that ventilation grilles comply with current regulations.
CONDENSATE NEUTRALISATION KIT
If fitted the condensate neutralisation kit will require replacing after 12 months of operation. Please refer to the item
specific instructions for further details.
67
20.0 SMART SYSTEM CONTROL SETTINGS
20.1
DISPLAY PANEL ACCESS MENU
To access menus from the display panel use the procedure shown below:
Only suitably qualified engineers should alter the settings and parameters within the herald
boiler. Incorrect settings could lead to operational problems within the boiler. These problems
would not be covered under the herald boiler warranty
20.1.1
Button
DISPLAY PANEL ACCESS MENU
Screen
Status
MENU
Operation
Display
Press and hold the LEFT SELECT soft key menu for 5 seconds
Rotate the NAVIGATION dial clockwise until 5 is displayed (first digit on the left)
Press the NAVIGATION dial to select the next digit. Rotate the NAVIGATION dial clockwise until 3
is displayed
Press the NAVIGATION dial 2 times to move to the last digit. Rotate the NAVIGATION dial counter
clockwise until 9 is displayed
SAVE
Press the RIGHT SELECT soft key (SAVE)
68
20.2
PARAMETER SETTING
Menu
User Access
Installer
Access
Yes
Yes
Time and Date
21.1
21.1
Yes
Yes
Software Version (read only)
21.1
No
Yes
Temperature Units (&deg;C/&deg;F)
21.1
Yes
Yes
SH Night Setback Offset
21.1
IF SH NSB &gt; 0:
21.1
21.1
No
Yes
No
Yes
Description
Vacation Mode (On/Off)
GENERAL
i. SH Night Setback On Times
ii. SH Night Setback Off Times
DHW Night Setback Offset
IF DHW NSB &gt; 0:
i. DHW Night Setback On Times
ii. DHW Night Setback Off Times
TEMPERATURE
SETTINGS
DATA LOGGING
FUNCTIONS
20.2.1
21.1
21.1
21.1
Display Timeout
21.1
No
Yes
Display Contrast
21.1
Yes
Yes
SH1 Set Point User
21.2
21.2
Yes
Yes
Minimum SH Set Point
No
Yes
Maximum SH Set Point
21.2
No
Yes
Offset SH1 Set Point
21.2
No
Yes
Differential SH1 Set Point
21.2
No
Yes
SH2 Set Point User
21.2
Yes
Yes
Offset SH2 Set Point
21.2
No
Yes
Differential SH2 Set Point
21.2
No
Yes
SH3 Set Point User
21.2
Yes
Yes
Offset SH3 Set Point
21.2
No
Yes
Differential SH3 Set Point
21.2
No
Yes
3-Way Valve Time
21.2
No
Yes
Reset Last 10 Errors
21.3
No
Yes
Service Mode Delay
21.4
21.4
No
Yes
Freeze Protection Pump On
No
Yes
Freeze Protection Burner On
21.4
No
Yes
21.4
No
Yes
Tank Set Point
21.5
Yes
Yes
Tank Set Point Differential
21.5
No
Yes
DHW Boiler Set Point
21.5
No
Yes
Boiler Set Point Offset
21.5
No
Yes
Boiler Set Point Differential
21.5
No
Yes
DHW Recirc Pump Offset
21.5
No
Yes
DHW Recirc Pump Differential
21.5
No
Yes
Freeze Protection Burner
Differential
DHW SETTINGS
See
Section
SMART SYSTEM CONTROL PARAMETERS
69
See
Section
User
Access
Installer
Access
Tank Minimum Set Point
21.5
No
Yes
Tank Maximum Set Point
21.5
No
Yes
DHW Max Rate
21.5
No
Yes
No
Yes
No
Yes
High Outdoor Temperature 1
21.6
21.6
No
Yes
SH1 Set Point at Low Outdoor Temp
21.6
No
Yes
SH1 Set Point at High Outdoor Temp
21.6
No
Yes
Outdoor Shutdown Temp 1
21.6
No
Yes
Outdoor Shutdown Differential 1
21.6
No
Yes
Shift Heat Curve 1
21.6
No
Yes
Low Outdoor Temperature 2
No
Yes
High Outdoor Temperature 2
21.6
21.6
No
Yes
SH2 Set Point at Low Outdoor Temp
21.6
No
Yes
SH2 Set Point at High Outdoor Temp
21.6
No
Yes
Outdoor Shutdown Temp 2
21.6
No
Yes
Outdoor Shutdown Differential 1
21.6
No
Yes
Shift Heat Curve 2
21.6
No
Yes
Low Outdoor Temperature 3
21.6
No
Yes
High Outdoor Temperature 3
21.6
No
Yes
SH3 Set Point at Low Outdoor Temp
21.6
No
Yes
SH3 Set Point at High Outdoor Temp
21.6
No
Yes
Outdoor Shutdown Temp 3
21.6
No
Yes
Shift Heat Curve 3
21.6
No
Yes
No
Yes
Menu
Description
DHW Type (normal, zone)
DHW SETTINGS
(CONT.)
i. SH/DHW Switching Time ii.
DHW/SH Switching Time
ELSE:
21.5
i. DHW FORCES SYSP
(YES/NO)
ii. DHW BLOCKS SYSP
(YES/NO)
IF Outdoor Sensor Connected:
Low Outdoor Temperature 1
OUTDOOR RESET
Boost Temperature
IF Boost Temperature &gt; 0 i.
Boost Time
21.6
70
Menu
ANTI-CYCLING
Description
Anti-cycling Time
Anti-cycling Override Differential
Ramp Delay (Enable/Disable)
Modulation Factor
Controlling Sensor(Outlet/System
Supply/Inlet)
Cascade Address
IF Address = 0:
Maximum Cascade Outlet Set
Point
See
Section
User
Access
Installer
Access
21.7
21.7
21.8
21.8
No
No
No
No
Yes
Yes
Yes
Yes
21.9
No
Yes
21.9
No
Yes
21.9
No
Yes
No
Yes
No
Yes
Cascade Offset Cascade
Differential Cascade Type (L/L, EFF)
Minimum On/Off Time Minimum Next On Time
Minimum Pumps On
CONTROL MODES
ELSE IF Address = 1: Alternate
Leader? (Y/N) IF Yes:
Maximum Cascade Outlet
Set Point
Cascade Offset Cascade
Differential Cascade Type (L/L, Eff) Minimum
On/Off Time Minimum Next On Time Minimum
Pumps On
BMS
Boiler Size
i. Cascade Address ii. Type
ii. Type
iii. Input
BMS (Active, Inactive) IF Active:
i. BMS Type (Power, Set Point)
IF Power:
1. Power at Minimum Volts
2. Power at Maximum Volts
ELSE:
1. Set Point at Minimum
Volts
2. Set Point at Maximum Volts ii.
Minimum Volts
iii. Maximum Volts
iv. TStat Input (Active, Inactive) IF
Inactive:
1. On Volts
2. Off Differential Volts
ModBus/BACNet (Active, Inactive) IF
Active:
i. BAS Timeout
21.10
21.10
71
User
Access
Installer
Access
No
No
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Reset Service Reminder
21.11
21.11
21.11
21.11
21.11
21.11
21.11
21.11
21.11
21.12
21.12
21.12
21.12
No
Yes
Installer Name
Installer Phone Number
21.12
21.12
No
No
Yes
Yes
Time &amp; Date
21.13
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Menu
CIRCULATION
PUMPS
SERVICE
NOTIFICATION
Description
System Pump Delay
Boiler Pump Delay
DHW Pump Delay
System Pump Anti-Seize Delay
Boiler Pump Anti-Seize Delay
DHW Pump Anti-Seize Delay
System Pump Type (CFH, WWSD)
Boiler Pump Delta T Set Point
Boiler Pump Minimum Volts
Service Notification Months
Service Notification Running Time
Service Notification Cycles
See Section
IF Outdoor Sensor Connected:
i. Low Outdoor Temperature 1 ii. High
Outdoor Temperature 1
iii. SH1 Set Point at Low Outdoor Temperature
iv. SH1 Set Point at High Outdoor Temperature
v. Outdoor Shutdown Temperature
BASIC SETUP
USB
vi. Outdoor Shutdown Differential 1
Cascade Address
IF Address = 0:
i. Maximum Cascade Set Point ii.
Cascade Offset
iii. Cascade Differential
iv. Cascade Type (L/L, EFF)
BMS (Active, Inactive) IF Active:
i. BMS Type (Power, Set
Point) IF Power:
1. Power at Minimum Volts
2. Power at Maximum Volts
ELSE:
1. Set Point at Minimum Volts
2. Set Point at Maximum Volts ii.
Minimum Volts
iii. Maximum Volts
iv. TStat Input (Active, Inactive) IF
Inactive:
1. On Volts
2. Off Differential Volts
21.13
21.13
21.13
21.13
1.11
72
21.0 VIEWABLE AND CHANGEABLE CONTROL PARAMETERS
Before changing p a r a m e t e r s , n o t e t h e settings so that the unit can be returned to its
original operating parameters.
21.1
21.1.1
GENERAL
VACATION MODE
This parameter forces the Space Heating (SH) and DHW set points to decrease by the amounts programmed in the
Night Setback Offset parameters. It is used to save energy, such as when the building is unoccupied for an extended
period of time. For this function to work, the Space Heating Night Setback Offset and/or DHW Night Setback Offset
parameters must be set to a value higher than 0&deg;. The default value of this parameter is OFF.
21.1.2
TIME AND DATE
The control uses an internal clock for the night setback feature and for logging of events. For these features to work
correctly, the clock must be set when the boiler is first installed or anytime the boiler has been powered off for more
than four (4) hours. This parameter must be accessed to set the clock.
The internal clock does not adjust for british summer time and therefore, will require a manual
adjustment. The clock is automatically updated whenever a pc is connected and the win_pro
installer program is started.
21.1.3
SOFTWARE VERSION
The software version allows the user to view the software version in use by the control. This software controls the
operation of the boiler. When a new software version becomes available, the existing control can be replaced with a
new control to update the software.
Software version is read only.
21.1.4
TEMPERATURE UNITS (&deg;C / &deg;F)
The control can be configured to display temperature in either &deg;C or &deg;F. This parameter can be changed by the user
or the installer by accessing the Temperature Units parameter. The default is &deg;F.
21.1.5
SPACE HEATING (SH) AND DOMESTIC HOT WATER (DHW) NIGHT SETBACK OFFSET
Once the unit’s internal clock has been set correctly, the Night Setback feature can be used to program a lower set
point during unoccupied times. Both the space heating and DHW can be programmed for night setback. When in night
setback, the control reduces the set point by a fixed amount. For space heating, it subtracts the space heating night
setback offset from each of the SH user set points (SH1, 2, and 3 Set point parameters), or the calculated outdoor reset
set point (if lower). For DHW, it subtracts the DHW night setback offset from the tank set point (Tank Set point
parameter).
The DHW night setback will not work without a tank sensor installed.
The installer may adjust the space heating night setback offset by accessing the SH Night Setback Offset parameter
and the DHW night setback offset by accessing the DHW Night Setback Offset parameter. The minimum setting is 0&deg;C
and the maximum setting is 50&deg;C.
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21.1.6
SPACE HEATING (SH) AND DOMESTIC HOT WATER (DHW) NIGHT SETBACK ON AND OFF TIMES
These are the times at which the SH Night Setback and DHW Night Setback Offsets become active and inactive. There
are seven (7) stop times and seven (7) start times each for the SH and DHW night setback functions. Any start or stop
time may be set to any time during the week. When a start time and a stop time are programmed for the same day and
time, the stop time has priority (this is how a start time can be disabled). The installer can adjust the SH Night Setback
start and stop times by accessing the parameter SH NSB On/Off Times. The installer can access the DHW Night
Setback start and stop times by accessing the DHW NSB On/Off Times parameter. These settings can be adjusted as
follows:
1.
When the screen is first accessed, start and stop triggers 1 are displayed. If a different trigger number is
desired, rotate the NAVIGATION dial until the desired trigger number appears. Once it is found, press the
NAVIGATION dial to adjust the start and stop times. The day of the week for the start time will flash.
Rotate the NAVIGATION dial to adjust the day of the week of the start trigger. Once it is set to the desired
day of the week, press the NAVIGATION dial again. The start time hour will flash.
Rotate the NAVIGATION dial to adjust the start time hour to the desired time. Press the NAVIGATION dial
again. The start time minutes will flash.
This process may be continued until the start and stop days and times are adjusted as desired. When finished
with this set of triggers, press the [SAVE] key.
Rotate the NAVIGATION dial to select another set of start and stop triggers, or press the [EXIT] key to return
to the previous menu.
2.
3.
4.
5.
21.1.7
NIGHT SETBACK OVERRIDE
Any Night Setback On trigger currently active or scheduled within the next seven (7) days can be skipped. To skip a
trigger, go to the Night Setback Status Screen and press the SKIP button. Rotate the NAVIGATION dial until the arrow
(&gt;) is next to the trigger you wish to skip. Press the NAVIGATION dial once. “SK” will appear next to that trigger to
indicate that it will be skipped. You can restore an upcoming trigger by selecting that trigger, and pressing the
NAVIGATION dial again. The “SK” next to that trigger will disappear.
To save any changes and return to the Home Screen, press the RIGHT SELECT [HOME] key. To return to the Status
Screen without saving the changes, press the LEFT SELECT [EXIT] key.
21.1.8
DISPLAY TIMEOUT
This is the time in which the display remains illuminated. The range is 10 seconds to 10 minutes. The default is 10
minutes.
21.1.9
DISPLAY CONTRAST
The contrast of the LCD display can be adjusted to improve readability. The contrast is adjusted automatically when
the display board is tested at the factory, but different ambient conditions may warrant changing the setting. This
parameter can be changed by accessing the Display Contrast setting. The range of this parameter is -10 to +10. The
default setting is 0.
21.2
21.2.1
TEMPERATURE SETTINGS
SPACE HEATING (SH1, SH2, SH3) SET POINT
There are three (3) individual user set points for better zone control. These are listed as SH1 Set Point through SH3
Set Point. If multiple set points are calling for heat the highest set point has priority. The range is SH Minimum Set
point to SH Maximum Set point. The default is 52&deg;C.
21.2.2
SPACE HEATING (SH) MINIMUM SET POINT
The SH minimum set point sets the minimum water temperature set point that can be used for space heating operation.
The user or installer will not be able to program the control with a lower SH set point. This parameter can only be
changed by the installer by accessing Minimum SH Set point parameter. The temperature range of this parameter is
0&deg;C to the space heating maximum set point. The default value is 16&deg;C.
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21.2.3
SPACE HEATING (SH) MAXIMUM SET POINT
The SH maximum set point sets the maximum water temperature set point that can be used for space heating. The
user or installer will not be able to program the control with a higher SH set point. This parameter can only be changed
by the installer by accessing Maximum SH Set point parameter. The temperature range of this parameter is the space
heating minimum set point to 88&deg;C. The default value is 85&deg;C.
21.2.4
SH1 - SH3 OFFSET SET POINT
The SH offset sets how many degrees above set point the temperature has to go before the boiler will shut off. This
parameter can only be changed by the installer by accessing parameters SH1, 2 and 3 Offset Set point parameters.
The temperature range of these parameters is 0&deg;C to 20&deg;C. The default value is 10&deg;C.
SH1 - SH3 Differential Set Point
The SH differential sets how many degrees below the offset the temperature has to drop before the boiler turns back
on. This parameter can only be changed by the installer by accessing the SH1, 2 and 3 Differential Set point
parameters. The range is 0&deg;C to 60&deg;C. The default is 20&deg;C.
21.3
21.3.1
DATA LOGGING
RESET LOG ERRORS
The reset log errors function clears the last 10 errors log.
21.4
21.4.1
FUNCTIONS
SERVICE MODE DELAY
By pressing the pin button on the front of the display for five (5) seconds, the control will be placed in Service Mode.
This will override all other heat demands. The Service Mode allows the installer to set the unit to any firing rate for the
purpose of combustion analysis. The delay sets the length of time the boiler will stay in the Service Mode if no keys
have been pressed before going back to its original state. This parameter can only be changed by the installer by
accessing the Service Mode Delay parameter. The time range of this parameter is 1 to 10 minutes. The default value
is 10 minutes.
21.4.2
FREEZE PROTECTION PUMP ON
The SMART SYSTEM control will turn on the boiler and system pump outputs whenever the inlet temperature drops
below this setting. This is done to prevent the water in the heat exchanger from freezing. Certain low- temperature
applications (such as snow melt) can operate at temperatures around freezing, so this setting needs to be lowered in
these cases. The installer can adjust the temperature at which the pump outputs are turned on by accessing the
Freeze Protection Pump On parameter. The minimum setting is -19&deg;C, and the maximum setting is 7.2&deg;C. The default
setting is 7.2&deg;C.
21.4.3
FREEZE PROTECTION BURNER ON
If running the pumps does not prevent the inlet temperature from falling closer to freezing, the SMART SYSTEM
control will fire the burner at low fire. The installer can adjust the temperature at which the burner fires by adjusting
the Freeze Protection Burner On parameter. The minimum setting is -19&deg;C, and the maximum setting is the Freeze
Protection Pump On parameter. The default setting is 2.8&deg;C.
21.4.4
FREEZE PROTECTION BURNER DIFFERENTIAL
Once the burner has started firing due to a low inlet temperature, the inlet temperature must increase by this
amount before the burner turns back off. The installer can adjust this differential by accessing the Freeze Protection
Burner Differential parameter. The minimum setting is 0&deg;, and the maximum is 11&deg;C. The default setting is 2.8&deg;C.
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21.5
21.5.1
DHW SETTINGS
DHW TANK SET POINT
By installing a tank sensor, the SMART SYSTEM control can perform the tank thermostat function. The SMART
SYSTEM control automatically detects the presence of this sensor, and generates a DHW call for heat when the tank
temperature drops below the tank set point differential (Tank Set point Differential parameter), and finishes the call
for heat when the tank temperature reaches tank set point. This parameter can be changed by the installer by accessing
the DHW Tank Set point parameter. The temperature range of this parameter is from the tank minimum set point to the
tank maximum set point. The default value is 49&deg;C.
When the tank sensor is connected the boiler will still fire during a DHW demand even if the Herald is turned off via the
BMS connections.
21.5.2
TANK SET POINT DIFFERENTIAL
When a tank sensor is installed, the tank temperature must drop this amount below the tank set point (DHW Tank Set
point parameter) before the boiler turns back on. The installer can adjust this setting by accessing the Tank Set point
Differential parameter. The minimum setting is 0&deg;C, and the maximum is 22&deg;C. The default setting is 3&deg;C.
21.5.3
DHW BOILER SET POINT
When a DHW call for heat becomes active, the control will use the DHW boiler set point to determine the firing rate of
the boiler based on the boiler outlet water temperature, or system temperature when DHW is programmed as a
zone. This parameter can be changed by the installer by accessing the DHW Boiler Set point parameter. The
temperature range of this parameter is 20&deg;C to 88&deg;C. The default value is 82&deg;C.
21.5.4
DHW BOILER OFFSET
This parameter reflects the degrees above DHW boiler set point the temperature has to go before the boiler will shut
off. The range is 0&deg;C to 11&deg;C. The default setting is 2.8&deg;C.
21.5.5
DHW BOILER DIFFERENTIAL
This parameter reflects the degrees below DHW boiler offset set point the temperature has to go before the boiler
turns back on. The range is 0&deg;C to 33&deg;C. The default setting is 6&deg;C.
21.5.6
DHW RECIRCULATION PUMP OFFSET (RECIRCULATION PUMP)
The SMART SYSTEM control will turn the DHW recirculation pump on when the DHW return water temperature drops
below the DHW Tank Set Point minus the DHW Recirculation Pump Offset. The range for this parameter is 0&deg; to
30&deg;C. The default value is 5&deg;C.
21.5.7
DHW RECIRCULATION PUMP DIFFERENTIAL
Once the SMART SYSTEM control turns the DHW recirculation pump on, the DHW return water temperature must
increase by the DHW Recirculation Pump Differential before the control turns the DHW recirculation pump back off.
The range of this parameter is 0&deg; to 50&deg;C. The default value is 2&deg;C.
21.5.8
TANK MINIMUM SET POINT
This setting controls the minimum tank set point for the tank temperature. The installer can adjust this by accessing
the Tank Minimum Set point parameter. The minimum setting is 16&deg;C and the maximum setting is the maximum tank
set point (Tank Maximum Set point parameter). The default value is 16&deg;C.
21.5.9
TANK MAXIMUM SET POINT
This setting controls the maximum tank set point for the tank temperature. The installer can adjust this by accessing
the Tank Maximum Set point parameter. The minimum setting is the minimum tank set point (Tank Minimum Set
point parameter) and the maximum setting is 88&deg;C. The default value is 88&deg;C.
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21.5.10
FAN SPEED LIMITING FOR INDIRECT DHW TANK
This parameter determines the maximum fan speed (and therefore the maximum kW rate) to be used when heating
an indirect DHW tank. This setting may be used when the tank is unable to accept all of the kW available from the
boiler. This parameter may be adjusted by the installer by accessing the Fan Speed Limiting for Indirect DHW Tank
parameter. The default value is the maximum fan speed for that model.
21.5.11
DHW TYPE
This parameter determines whether the boiler treats the indirect DHW tank as a separate load or as a zone on the
primary loop. When programmed as a separate load, the boiler will turn on the DHW pump and then turn off the
boiler pump when an indirect DHW demand begins. When programmed as a zone, the boiler will turn on the DHW
pump, leave the boiler pump on and change the system set point to the DHW boiler set point (DHW Boiler Set point
parameter).
This setting may be changed by the installer by accessing the DHW Type parameter. The choices are NORMAL and
ZONE. The default setting is NORMAL.
21.5.12
SH/DHW SWITCHING TIME
When a boiler has a space heating demand and it receives a DHW demand, it will immediately switch to the DHW
demand and start a timer. Once the timer has expired, the boiler will switch back to the space heating demand and
start another timer. Once this other timer expires, it will switch back to the DHW demand. The installer can adjust
the length of time the boiler will service the space heating demand by accessing the SH/DHW Switching Time
parameter. The minimum setting is 0 minutes and the maximum setting is 55 minutes. The default time is 30
minutes.
21.5.13
DHW/SH SWITCHING TIME
When a boiler has a DHW demand and it receives a space heating demand, the SMART SYSTEM control will start a
timer. Once the timer expires, it will stop the DHW demand and service the space heating demand. The installer can
adjust the length of time the boiler will service the DHW demand by accessing the DHW/SW Switching Time
parameter. The minimum setting is 0 minutes and the maximum setting is 55 minutes. The default setting is 30
minutes.
21.5.14
DHW FORCES SYS PUMP
When the indirect DHW tank is connected as a zone on the primary loop, the DHW Forces Sys Pump parameter tells
the system pump if it must run when there is a DHW demand. To have the system pump constantly running during a
DHW demand, set the DHW Forces Sys Pump parameter to YES (the parameter DHW Blocks Sys Pump must be set
to NO). If this parameter and the DHW Blocks Sys Pump parameter are both set to NO, the system pump operation
will be based strictly on the System Pump Type parameter setting. The default setting of this parameter is YES.
21.5.15
DHW BLOCKS SYS PUMP
When the indirect DHW tank is connected as a zone on the primary loop, the DHW Blocks Sys Pump parameter tells
the system pump if it is allowed to run during a DHW demand. To force the system pump to turn off during a DHW
demand, set the DHW Blocks Sys Pump parameter to YES. The default setting is NO.
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21.6
OUTDOOR RESET
The option of controlling up to three (3) different outdoor resets for low outdoor temperatures is available.
21.6.1
OUTDOOR (1 - 3) LOW
When the outdoor air temperature drops to this point, the water temperature will be at the Set point 1 at Low Outdoor
Temp 1, Set point 2 at Low Outdoor Temp 2 and Set point 3 at Low Outdoor Temp 3 parameters. If the outdoor air
temperature drops further, the set point will continue to increase above this setting. This parameter can be changed
by the installer by accessing the Outdoor (1-3) Low parameter. The temperature range of this parameter is -39&deg;C to
high outdoor temperature set point. The default value is -4&deg;C.
21.6.2
OUTDOOR (1 - 3) HIGH
When the outdoor air temperature rises to or above this point, the water temperature will be at the Set point 1 at High
Outdoor Temp 1, Set point 2 at High Outdoor Temp 2 and Set point 3 at High Outdoor Temp 3 parameters. This
parameter can be changed by the installer by accessing the Outdoor (1-3) High parameter. The temperature range of
this parameter is low outdoor temperature set point to 40&deg;C. The default value is 21&deg;C.
Default 82&deg;C
Default 51&deg;C
Default 21&deg;C
LOW OUTDOOR
TEMPERATURE
DEFAULT -4&deg;C
21.6.3
OUTDOOR AIR CURVE
21.6.4
SET POINT (1 - 3) AT LOW OUTDOOR TEMPERATURE
HIGH OUTDOOR
TEMPERATURE
DEFAULT 21&deg;C
When the outdoor air temperature drops to the Outdoor (1 - 3) Low parameters, the calculated set point will be at this
setting (FIG. 1-1). If the outdoor air temperature drops further, the set point will continue to increase above this
setting. However, if SH1, SH2, and SH3 are set lower, the water temperature will be limited by these set points
instead. These parameters can be changed by the installer by accessing the Set point 1 at Low Outdoor Temp 1, Set
point 2 at Low Outdoor Temp 2 and Set point 3 at Low Outdoor Temp 3 parameters. The temperature range of this
parameter is 20&deg;C to 88&deg;C. The default value is 82&deg;C.
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21.6.5
SET POINT (1 - 3) AT HIGH OUTDOOR TEMPERATURE
When the outdoor air temperature rises to or above Outdoor (1 - 3) High parameters, the calculated set point will be
at this setting (FIG. 1-1). These parameters can be changed by the installer by accessing the Set point 1 at High
Outdoor Temp 1, Set point 2 at High Outdoor Temp
2 and Set point 3 at High Outdoor Temp 3 parameters. The temperature range of this parameter is 20&deg;C to 88&deg;C. The
default value is 21&deg;C.
21.6.6
OUTDOOR AIR SHUTDOWN (SH1 - SH3)
When the outdoor temperature rises above this point, the control will block the corresponding SH demand
(DHW demands will still be active). These parameters can be changed by the installer by accessing the Outdoor Air
Shutdown SH1, SH2, and SH3 parameters. The temperature range of this parameter is 0&deg;C to 40&deg;C. The default
value is 21&deg;C.
21.6.7
OUTDOOR AIR SHUTDOWN DIFFERENTIAL (SH1 - SH3)
The outdoor air shutdown differential parameter is the number of degrees below Outdoor Air Shutdown SH1, SH2,
and SH3 parameters the outdoor air temperature must go before the boiler will respond to the corresponding SH
demand. These parameters can be changed by the installer by accessing the Outdoor Air Shutdown Differential
SH1, SH2, and SH3 parameters The temperature range of this parameter is 0&deg;C to 30&deg;C. The default value is 6&deg;C.
21.6.8
SHIFT RESET CURVE (SH1 - SH3)
There is a shift reset parameter for each outdoor reset curve. The shift reset parameter shifts the actual set point
above or below the calculated set point by the number of degrees in this parameter. These parameters can be
changed by the installer by accessing the Shift Reset Curve SH1, SH2, and SH3 parameters. The temperature range
of this parameter is -10&deg;C to 10&deg;C. The default value is 0&deg;C. This feature will be active if this parameter is set to
anything other than 0&deg;C.
21.6.9
BOOST TEMPERATURE
If a SH demand lasts longer than the programmed time delay setting and there have been no DHW demands, the
control will increase the water temperature set point by the amount in this parameter. If the SH demand continues
through another time period, the set point will be increased again. This will continue until either the SH demand ends,
a maximum of 20 increases has occurred, or SH1, SH2, SH3 maximum set point has been reached. Once the SH
demand has been satisfied the set point will revert back to its calculated setting. The boost temperature can be
changed by the installer by accessing the Boost Temperature parameter. The temperature range of this parameter is
0&deg;C to 14&deg;C. The default value is 0&deg;C. This feature will be active if this parameter is set to anything other than 0&deg;C.
21.6.10
BOOST TIME
The boost time parameter sets the amount of time that must elapse with a SH demand before the water temperature
calculated set point will be increased. This parameter can be changed by the installer by accessing the Boost Time
parameter. The time range for this parameter is 0 minutes to 55 minutes. The default value is 0 minutes.
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21.7
21.7.1
ANTI-CYCLING
ANTI-CYCLING TIME
Once the burner turns off, a set amount of time must elapse before the control will respond to a new demand. The
control will block the new heat demand and anti-cycling will be shown in the display until the time has elapsed or the
water temperature drops below the Anti-Cycling Override Differential parameter. This parameter can be changed by
the installer by accessing the Anti-Cycling Time parameter. The time range for this parameter is 1 minute to 10
minutes. The default value is 1 minute.
21.7.2
ANTI-CYCLING OVERRIDE DIFFERENTIAL
The control will bypass the anti-cycling time if the inlet water temperature drops too much. The control will use the
inlet water temperature present at the boiler when it shuts off as the starting point. If the inlet temperature drops
below the temperature parameter the control will abort anti-cycling and allow the boiler to fire. This parameter can
be changed by the installer by accessing the Anti-Cycling Override Differential parameter. The temperature range of
this parameter is 0&deg;C to 30&deg;C. The default value is 6&deg;C.
21.7.3
RAMP DELAY (ENABLE / DISABLE)
This parameter allows the installer to enable or disable the SH ramp delay. The default setting is disabled.
21.7.4
MODULATION FACTOR
This parameter allows the installer to reduce the responsiveness of the temperature control function, for situations
where, for example, redundant heating capacity is installed. The values that are available are 40, 50, 60, 70, 80, 90,
and 100, with 100 being the most responsive. The default value is 100.
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21.8
RAMP SETTINGS
Please note that the brackets ([]) denote screen status.
The SMART SYSTEM control can be programmed to limit the firing rate for a fixed period of time at the start of a
space heating or BMS set point demand. There are six (6) possible limits, each with their own time delay. The first
limit applies as soon as the burner starts. Once its time delay expires, the second limit is applied and its timer begins.
The control steps through these limits until the 6th (sixth) limit expires. Note, however, that the 6th limit will also limit
the rate for the rest of that heat demand. The installer can adjust the firing limits and time delays by accessing the
Ramp Settings parameter. Once this parameter is selected, the screen will show the step number, the time delay for
that step and the limit value corresponding with that step. If the installer wishes to adjust one of the values in that
step, he can press the NAVIGATION dial until the value he wishes to change is flashing. The installer can then rotate
the NAVIGATION dial to adjust that value. If the installer presses the RIGHT SELECT [SAVE] key while the limit
value is flashing, the step value will flash again. The installer can then select the next step and adjust the delay and
limit values corresponding with that step.
When finished, the installer can press the RIGHT SELECT [SAVE] key to store the new settings, or the LEFT
SELECT [EXIT] key to return to the Anti-Cycling parameter list without saving the changes. The delay value can be
set between 0 minutes and 40 minutes. The limit value can be set between 0% and 100%.
21.9
21.9.1
CONTROL MODES
CONTROLLING SENSOR
The SH controlling sensor parameter selects the sensor the control will use to regulate the boiler firing rate. This
parameter is adjustable by the installer by accessing the Controlling Sensor parameter. The sensor selections are as
follows: The outlet sensor regulates the firing rate based on the outlet water temperature of the boiler and the
inlet sensor regulates the firing rate based on the inlet water temperature of the boiler. If the outlet sensor is selected,
and the optional system supply sensor is connected, the control will regulate the firing rate based on the system
supply sensor temperature. The default sensor is the Outlet Sensor.
21.9.2
CASCADE ADDRESS
The boiler designated as the Leader needs to be programmed with address 0. All the Member boilers require
addresses from
1 to 7, and the addresses must be different for each Member. The addresses can be in any order, regardless of the
order in which the units are wired together. This parameter is adjustable by the installer by accessing the Cascade
Address parameter. The outdoor air (if used) and system supply sensor must be connected to the Leader boiler. The
default address is 1.
21.9.3
MAXIMUM CASCADE SET POINT
This parameter determines the set point used by the individual boilers in a Cascade when a system sensor is
connected to the Leader boiler. When a boiler is commanded to fire by the Leader boiler, it will attempt to achieve this
temperature at its outlet. The Leader boiler will limit the modulation of the boiler(s) in order to hold the temperature at
the system supply sensor to the user set point. If any of the boiler outlet temperatures reach the maximum cascade
set point, that boiler will then modulate down on its own in order to keep its outlet temperature within the maximum
cascade set point. Therefore, this parameter can be used to limit the outlet temperatures of all the boilers in a
Cascade. Note that this parameter does not apply when the boiler is heating an indirect DHW tank programmed as
normal. This parameter is adjustable by the installer by accessing the Maximum Cascade Set Point parameter. The
temperature range of this parameter is 0&deg;C to 88&deg;C. The default maximum cascade set point is 85&deg;C.
21.9.4
CASCADE OFFSET
This parameter determines how much the temperature must go above set point before the lead boiler will turn off.
This parameter can be adjusted by the installer by accessing the Cascade Offset parameter. The temperature
range of this parameter is 0&deg; to 11&deg;C the default value is 6&deg;C.
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21.9.5
CASCADE DIFFERENTIAL
This parameter determines how much the temperature must go below the turn off temperature (Set point + Offset)
before the lead boiler turns on. This parameter can be adjusted by the installer by accessing the Cascade Differential
parameter. The temperature range of this parameter is 0&deg;C to 33&deg;C The default value is 11&deg;C.
21.9.6
CASCADE TYPE (L/L / EFF)
There are two (2) options for the way a Cascade divides the load between its heaters. The first is Lead/Lag,
designated as L/L in the menu. This method is used when it is desired to have the least amount of total flow through
the boilers. This method will modulate the last two (2) boilers that are firing. This provides for smooth transitions
when a boiler turns on or off. When the last boiler reaches 100% and the calculated load is still increasing, it will start
the next boiler at 20% and reduce the previous boiler to 80%, thus eliminating the sudden jump in total output of the
Cascade. When the calculated load is decreasing and the last boiler gets down to 20% fire, it will hold it there and
start lowering the firing rate on the next-to-last boiler. When the next-to-last boiler reaches 20%, it will turn the last
boiler off and raise the rate of the next-to-last boiler to 40%, thus eliminating the sudden drop in total output of the
Cascade.
The other Cascade divider method is Efficiency Optimisation, designated as EFF in the menu. This method is used,
as the name implies, when it is desired to have the most efficient system. When the first boiler reaches 100% rate, it
lowers its rate to 50% and turns on the next boiler at 50%. The two (2) boilers then modulate at the same rate. As the
calculated load increases further and both boilers ramp up to 100%, it lowers the rate of the first two (2) boilers to
67% and brings the next boiler on at 67%. The three (3) boilers then modulate together. As the calculated load
decreases, the boilers will reach 20%, at which time the last boiler (the third in our example) will turn off and the
Cascade will increase the rates of the remaining boilers to provide the equivalent total output as before ((3 x 20%) / 2
= 30% in our example).
Efficiency optimisation is automatically selected when boilers of different sizes are programmed into the Leader
control (see Boiler Size on page 27).
21.9.7
MINIMUM ON/OFF TIME
In order to prevent units in a Cascade from short cycling, this parameter defines the minimum ON and OFF time for
each unit. The installer can adjust this time by accessing the Minimum On/Off Time parameter. The minimum
setting is 0 seconds and the maximum setting is 10 minutes. The default is 30 seconds.
21.9.8
MINIMUM NEXT ON TIME
In order to reduce the risk of temperature overshoot with a Cascade, this parameter defines the minimum time delay
from starting one unit until the next unit may be started. The installer can adjust this time delay by accessing the
Minimum Next On Time parameter. The minimum setting is 0 minutes and the maximum setting is 10 minutes. The
default is 60 seconds.
21.9.9
MINIMUM NUMBER OF PUMPS ON
When the boiler is a Cascade Leader, it can force a minimum number of boiler pump outputs to be on continuously,
regardless of how many boilers are firing. This is normally used when the boilers are piped in a full-flow configuration,
and the boiler pump outputs are controlling isolation valves. The Leader will force the boiler pump output on the
highest priority boiler to turn on first, then the boiler pump output on the second highest priority boiler, and so forth,
until the minimum number of pump outputs are turned on. The range of this parameter is 0 to 8. The default value is
0.
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21.9.10
ALTERNATE LEADER
This parameter allows the Member 1 boiler to automatically assume control of the Cascade should it lose
communication with the Leader boiler. When programmed to YES, it is recommended that the Member 1 boiler
have its own set of external sensors installed (such as the system supply sensor), to maintain the same level of
temperature control as with the Leader boiler. Voltage signals (such as the 0 - 10V system pump speed input) can
be connected to both boilers.
Do not connect the sensors connected to the leader boiler to the member 1 boiler. The actual
water temperatures will be higher than expected, which could lead to property damage and/or
personal injury..
When communication is re-established with the Leader boiler, Member 1 will automatically relinquish control of the
Cascade to the Leader boiler.
The default value of this parameter is NO.
21.9.11
BOILER SIZE
When boilers of different sizes are connected together in a Cascade, the Leader boiler has to know the size of each
boiler in that Cascade. The Boiler Size parameters allow the installer to program the size based on the Cascade
address. This screen shows the Cascade address and the size of the boiler with that address (in Btu/hr):
1.
2.
3.
4.
5.
When the Boiler Size screen is first accessed, Cascade Address (SELF) is shown.
Press the NAVIGATION dial twice to access the Input setting. Rotate the NAVIGATION dial to
increase the boiler input. Input settings 0 - 400 Btu/hr can be adjusted in increments of 5 (5000 Btu/hr).
When the closest approximate boiler size is shown, press the RIGHT SELECT [SAVE] key.
Rotate the NAVIGATION dial to select the address of the next boiler in the Cascade. Repeat Step two
above.
Once the size of the last boiler in the Cascade has been entered and saved, press the LEFT SELECT
[EXIT] key to return to the Control Modes menu.
If no other parameters are to be adjusted, press the RIGHT SELECT [HOME] key to save the new settings
and return to the Status screens.
The SMART SYSTEM control automatically uses the Efficiency Optimisation Cascade type when controlling boilers of
different sizes.
21.10
21.10.1
BUILDING MANAGEMENT SYSTEM (BMS)
BMS
The set point or modulation of the boiler may be controlled through the 0 - 10V BMS input, BACnet, or ModBus.
When the BMS parameter is set to INACTIVE, the 0 - 10V input will be ignored. When set to ACTIVE, the set point or
modulation will be controlled by the voltage on the 0 - 10V input (in the case of 0 - 10V BMS control), or the 0 - 10V
input value received through ModBus or BACnet. The default value is INACTIVE.
21.10.2
BMS TYPE
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet, the 0 - 10V signal
can be interpreted as either a modulation command or a set point. When the BMS Type parameter is set to POWER,
the 0 - 10V signal will control the modulation. When set to SETPOINT, the 0 - 10V signal will control the SH set
point. The default setting is SETPOINT.
83
21.10.3
RATE AT MINIMUM VOLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS
Type is programmed as POWER, the modulation percentage represented by the Volts at Minimum parameter is set
by the Rate at Minimum Volts parameter. The minimum value is 0% and the maximum is the Rate at Maximum Volts
setting. The default value is model dependant.
21.10.4
RATE AT MAXIMUM VOLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS
Type is programmed as POWER, the modulation percentage represented by the Volts at Maximum parameter is set
by the Rate at Maximum Volts parameter. The minimum value is the Rate at Minimum Volts setting and the
maximum is 100%. The default value is 100%.
21.10.5
SET POINT AT MINIMUM VOLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS Type is
programmed as SETPOINT, the set point represented by the Volts at Minimum parameter is set by the Set Point at
Minimum Volts parameter. The minimum value is 32&deg;F (0&deg;C) and the maximum is the Set Point at Maximum Volts
setting. The default value is 70&deg;F (21&deg;C).
21.10.6
SET POINT AT MAXIMUM VOLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS
Type is programmed as SETPOINT, the set point represented by the Volts at Maximum parameter is set by the Set
Point at Maximum Volts parameter. The minimum value is the Set Point at Minimum Volts setting and the maximum
is 190&deg;F (88&deg;C). The default value is 180&deg;F (82&deg;C).
21.10.7
VOLTS AT MINIMUM
When programmed for BMS control through the 0 -10V BMS input or through ModBus/BACnet, the Volts at Minimum
parameter should be set to the minimum voltage signal sent to the SMART SYSTEM control. The range of this
parameter is 0.0V to the Volts at Maximum value. The default setting is 2.0V.
21.10.8
VOLTS AT MAXIMUM
When programmed for BMS control through the 0 -10V BMS input or through ModBus/BACnet, the Volts at Maximum
parameter should be set to the maximum voltage signal sent to the SMART SYSTEM control. The range of this
parameter is the Volts at Minimum value to 10.0V. The default value is 10.0V.
21.10.9
BMS THERMOSTAT INPUT
When controlling the boiler through the 0 - 10V BMS input, BACnet, or ModBus, the boiler can be enabled one of two
ways. With the BMS Thermostat Input parameter set to ACTIVE, the boiler will be enabled by closing the Heat/ Loop
Demand 1 input. When set to INACTIVE, the boiler will be enabled by the voltage level on the 0 - 10V input (in the
case of 0 - 10V BMS control), or the 0 - 10V input value received through BACnet or ModBus. The default value is
INACTIVE.
The boiler will still fire on a DHW demand if the Herald is directly controlling the DHW via the
sensor point at 29-30
21.10.10
ON VOLTS
When programmed for BMS control through the 0 -10V BMS input or through ModBus/BACnet and the BMS
Thermostat Input is set to INACTIVE, the On Volts parameter determines the 0 - 10V BMS input voltage at which
the boiler is enabled. The minimum value is 0.5V and the maximum is 10.0V. The default value is 2.0V.
84
21.10.11
OFF DIFFERENTIAL VOLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS
Thermostat Input is set to INACTIVE, the Off Differential Volts parameter determines how far below the On Volts
setting the 0 - 10V BMS input voltage must be in order to disable the boiler. The minimum value is 0.2V and the
maximum is the On Volts setting. The default value is 1.0V.
21.10.12
MODBUS/BACNET
When BMS is set to ACTIVE (see BMS Active / Inactive) and the boiler is being controlled through BACnet or
ModBus, set ModBus/BACnet parameter to ACTIVE. Otherwise, set the ModBus/BACnet parameter to INACTIVE.
Note that the boiler can still be monitored by ModBus or BACnet with this parameter set to INACTIVE. The default
value is INACTIVE
21.10.13
BAS T/O
This is the amount of time the unit controls will wait to receive a communication string from the BMS controller
before reverting back to its own internal parameters. This parameter is adjustable by the installer by accessing the
BAS T/O parameter. The adjustment range of this parameter is 5 seconds to 2 minutes. The default value is 10
seconds.
21.11
21.11.1
CIRCULATION PUMPS
SYSTEM PUMP DELAY
The system pump delay parameter sets the length of time the system pump (if connected) will run after a SH demand
has been satisfied or outdoor shutdown has begun. This parameter is adjustable by the installer by accessing the
System Pump Delay parameter. The time range for this parameter is
1 second to 40 minutes. The default time is 30 seconds.
21.11.2
BOILER PUMP DELAY
The SH pump delay parameter sets the length of time the boiler pump will run after a SH demand has been satisfied.
Setting the delay time to 0 will disable the pump. This parameter is adjustable by the installer by accessing the
Boiler Pump Delay parameter. The time range for this parameter is
1 second to 40 minutes. The default time is 30 seconds.
21.11.3
DHW PUMP DELAY
The DHW pump delay parameter sets the length of time the DHW pump (if connected) will run after a DHW demand
has been satisfied. This parameter is adjustable by the installer by accessing the DHW Pump Delay parameter. The
time range for this parameter is 10 seconds to 40 minutes. The default time is 1 minute.
21.11.4
SYSTEM PUMP ANTI-SEIZE DELAY
If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of
time it runs is determined by the System Pump Anti-Seize Delay parameter. The range of this setting is 0 seconds to
40 minutes. The default setting is 20 seconds.
21.11.5
BOILER PUMP ANTI-SEIZE DELAY
If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of
time it runs is determined by the Boiler Pump Anti-Seize Delay parameter. The range of this setting is 0 seconds to
40 minutes. The default setting is 20 seconds.
21.11.6
DHW PUMP ANTI-SEIZE DELAY
If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of
time it runs is determined by the DHW Pump Anti-Seize Delay parameter. The range of this setting is 0 seconds to
40 minutes. The default setting is 20 seconds.
85
21.11.7
SYSTEM PUMP TYPE
The system pump can be programmed to operate in response to any of the Room Thermostat inputs, or to run
continuously until all three (3) SH demands go into Outdoor Shutdown. To program the system pump to operate
only with a space heating call for heat, set the System Pump Type parameter to CFH. To program the system pump
to run continuously until outdoor shutdown starts, set the System Pump Type parameter to WWSD. The default
setting is CFH.
21.11.8
BOILER PUMP DELTA T SET POINT
When using a variable speed boiler pump, and controlling it by means of the 0 - 10V Boiler Pump Speed Output, the
boiler pump will be controlled in order to maintain a minimum Delta T across the heat exchanger in the boiler (other
factors may override this target). This feature is to be used with Primary / Secondary piping systems only. A system
supply sensor MUST be installed. This parameter sets the target minimum Delta T it will use. The range of this
parameter is 8&deg;C to (33&deg;C. The default value is 11&deg;C.
21.11.9
BOILER PUMP MINIMUM VOLTAGE
The speed of the boiler pump can be controlled by the SMART SYSTEM control in order to maintain a minimum 'T
through the heat exchanger. Thus, as the firing rate decreases, the speed of the boiler pump can decrease as well.
The SMART SYSTEM control outputs a 0 - 10V signal to the boiler pump to control its speed. The Boiler Pump
Minimum Voltage parameter determines the minimum voltage given to the boiler pump, thereby setting its minimum
speed. The range of this setting is 2.5V to 10V. The default setting is 3.5V.
The standard pumps supplied with the herald boiler are A rated high efficiency fixed speed
pumps
21.12
SERVICE NOTIFICATION
Service Notification in Months
When the boiler control determines that a scheduled service is due based on days of installation, the boiler display
will turn yellow and a new status screen will appear informing the user that maintenance is required. This parameter
is adjustable by the installer by accessing the Service Notification in Months parameter. The time range for this
parameter is 0 months to 100 months. The default time is 12 months.
21.12.1
SERVICE NOTIFICATION RUNNING TIME
When the boiler control determines that a scheduled service is due based on the hours of actual operation, the boiler
display will turn yellow and a new status screen will appear informing the user that maintenance is required. This
parameter is adjustable by the installer by accessing the Service Notification Running Time parameter. The time
range for this parameter is 0 hours to 17,500 hours. The default time is 8,760 hours.
21.12.2
SERVICE NOTIFICATION CYCLES
When the boiler control determines that a scheduled service is due based on the number of boiler cycles, the boiler
display will turn yellow and a new status screen will appear informing the user that maintenance is required. This
parameter is adjustable by the installer by accessing the Service Notification Cycles parameter. The range for this
parameter is 0 cycles to 100,000 cycles. The default is 50,000 cycles.
21.12.3
RESET MAINTENANCE REMINDER
Once servicing has been completed, the service notification counter should be reset. This parameter can be reset
by the installer by accessing the Reset Maintenance Reminder parameter. Once accessed, press the RESET key to
reset the service notification counter.
86
21.12.4
SERVICE NAME AND PHONE NUMBER
Please note that the brackets ([]) denote screen status.
When a Maintenance Reminder timer or counter has expired, a Maintenance Reminder screen will appear on the
display. By programming the installer’s name and phone number, this information will appear on the Maintenance
Reminder Screen at that time. This can be programmed by accessing the Service Name and Phone Number
parameter. When selected, another menu will appear with PHONE and NAME.
1.
Rotate the NAVIGATION dial to point to the name/phone number to program and press the
NAVIGATION dial. The screen will now display the selected item (either PHONE or NAME).
2.
Press the NAVIGATION dial again. A cursor will appear at the bottom of the screen. By rotating the
NAVIGATION dial, various numbers and characters will appear. When the desired number/character is
found, press the NAVIGATION dial. The cursor will move to the next position.
3.
Repeat this procedure until the entire message is entered. If you make a mistake and wish to back up one
character, rotate the NAVIGATION dial until the back arrow (m) character is displayed and press the
NAVIGATION dial.
4.
When finished, press the RIGHT SELECT [SAVE] key to return to the previous menu.
21.13
BASIC SETUP
The Basic Setup Menu contains the most frequently used parameters from the list above. See the descriptions above
to set these parameters.
21.13.1
USB
Parameter files can be copied directly to and from a USB flash drive. When USB is selected from the Main Menu, the
display will ask you to insert a flash drive into the USB-A (rectangular) port next to the display. Once a drive is
inserted, the display will search the root directory of this drive for a folder named “Lochinvar”. If it does not find it, the
display will ask if you want it to create this folder. Press either the [YES] or [NO] key. If you press [NO], no further
operations are allowed, so you must remove the flash drive. If you press [YES], it will create the folder in the flash
drive. If the flash drive contains a folder named Lochinvar, the display will show all of the parameter files stored in
that folder.
If you wish to copy the parameters from the Smart System control into the flash drive, press the [SAVE] key. The
display will create a file name based on the current date and time (year-month-date-hours-minutes). If you wish to
cancel this operation, press the [NO] key. If you wish to change the filename, press the NAVIGATION dial. The first
character of the filename will flash. Rotate the NAVIGATION dial to change this character. Once it is correct, press
the NAVIGATION dial again, and edit the next character as before. When the new filename is ready, press the
[SAVE] key. The control will save the parameters to the flash drive, and the new file will appear in the list of parameter
files. Press the [EXIT] key to return to the Main Menu.
If you wish to copy a parameter file from the flash drive into the Smart System control, rotate the NAVIGATION dial
until the file you wish to copy is selected. Press the NAVIGATION dial once. The display will ask you if you want to
load the parameters from the file you selected. You can press [NO] to cancel the operation, or press [YES] to
continue with writing the parameters into the control. Once the loading process is complete, the display will return to
the Main Status Screen
87
22.0 ERP DATA TABLE
Type Boiler:
Condensing boiler:
low temperature boiler:
B11 boiler:
Cogeneration space heater:
Combination heater:
Unit:
kW
kW
kW
Rated heat output
P-rated (P4) at 60-80C
Heat output (p1) 30% at 30-37C
Seasonal space heating energy
%
efficiency (ɳs).
Energy efficiency (ɳ4) at 58-77C
%
Energy efficiency (ɳ1) at 30-37C
%
Auxiliary electricity consumption
At full load (elmax).
kW
At part load (elmin)
kW
In standby mode (Psb)
kW
Other
Standby heat loss (Pstby)
kW
Ignition burner power consumption
kW
Emissions (Nox) of nitrogen oxides
mg/kWh
(EN15502)
Sound power level, indoors
dB
(EN 14436-1:2006)
HCB46CE
HCB61CE
HCB86CE
HCB116CE
Yes
Yes
No
No
No
Value
38.5
38.1
13
Yes
Yes
No
No
No
Value
52
51.1
17.1
Yes
Yes
No
No
No
Value
74
73.1
25.4
Yes
Yes
No
No
No
Value
105
103.4
37.2
95
94
94
93
88
101.1
88.3
99.8
88.7
99.5
89.6
98.0
0.096
0.028
0.003
0.122
0.034
0.004
0.144
0.043
0.006
0.144
0.043
0.006
0.13
nil
0.172
nil
0.241
nil
0.334
nil
39
39
39
39
58
60
62
64
88
23.0 USER INSTRUCTIONS
Once the installation and commissioning is complete, the equipment owner or their representative should be made
aware of the operation of the appliance and its safety devices. A practical demonstration should be given describing
each functional step. Incorrect use may result in injury and will also invalidate the warranty.
23.1
GENERAL REQUIREMENTS
This equipment must be installed by a competent person, registered with an H.S.E.
approved body. All installations must conform to the relevant gas safety and
building regulations. Health &amp; safety requirements must also be taken into account
when installing any equipment.
A competent person must also undertake any alterations that require the gas train or
flue system to be broken.
Any interference with a sealed component is forbidden.
Failure to comply with the above may lead to prosecution.
Incorrect use may result in injury and will also invalidate the warranty
23.2
PROCEDURE FOR LIGHTING
7.
8.
9.
Ensure that the gas inlet appliance isolating valve, provided by the installer, is in the “off” position.
Press the power rocker switch, positioned on the back of the appliance to bring the equipment on.
The combustion fan should ramp up to full speed to purge the combustion chamber and then drop back to
half rate in order to light. As the gas inlet appliance isolating valve is closed, the controls should go to a flame
failure condition after four ignition attempts. If the above occurs correctly, open the gas inlet appliance
isolating valve and reset the unit by depressing the Enter/Reset button on the control panel.
10. The combustion fan will repeat the pre-purge procedure and attempt to light. Once a flame is established,
the LCD display will change to display the rate at which it is firing.
23.3
PROCEDURE FOR SHUTTING DOWN
To take the appliance out of service, hold down the RIGHT SELECT key (SHDN) in the main menu and choose yes. If
the appliance in to be shut down for a long period of time, the power supply should be isolated using the rocker switch
on the back and the gas supply should be isolated at the manual isolation valve.
89
23.4
SMART SYSTEM CONTROL
1
2
3
4
5
6
1
2
5
3
6
USB Drive
PC Connection
Left select key
Navigation dial
Reset switch
Right select key
4
The information on the bottom of the display shows the functions of the two SELECT keys on both corner, and the
NAVIGATION dial in the centre.
MENU
SETPOINTS
SHDN
Left SELECT key
NAVIGATION dial-pressing down
Right SELECT key
The smart system control face instantly informs the user of the status of the boiler by changing colour according to the
status of the boiler as below.
Normal operation
23.5
23.5.1
Service required
Boiler is not working
TEMPERATURE ADJUSTMENT PROCEDURE
CENTRAL HEATING SETPOINT
With the boiler firing, the setpoint can be adjusted using the NAVIGATION dial on the SMART SYSTEM control panel.
When “↓SET POINTS” is flashing at the bottom of the display the NAVIGATION dial can be used to set and store the
desired set point.
23.5.2
DHW SETPOINT
If the stored water temperature is to be controlled by a thermostat, the setting should be adjusted on the thermostat
itself. If the stored water temperature is to be controlled by a tank sensor, the default setpoint is 52C.
The setpoint should be adjusted to ensure that the water is stored at 60&deg;C and distributed at 50&deg;C within 1 (one) minute
at all outlets. Care is needed to avoid much higher temperatures because of the risk of scalding. At 50&deg;C the risk of
scalding is small for most people, but the risk increases rapidly with higher temperatures and for longer exposure times.
The risk to young children and to those with a sensory or mobility loss will be greater. Where a significant scalding risk
has been identified, the use of thermostatic mixing valves on baths and showers should be considered to reduce
temperature, these need to be placed as close to the point of use as possible.
Should the default value need adjusting, please refer to Section 21.2 Temperature adjustment
90
23.6
MAINTENANCE
See section 19.0 Maintenance
23.7
AIR SUPPLY
 When installed as a conventionally flued appliance, the room in which the appliance is installed must be
ventilated.
Blocking these vents may lead to severe injury, serious property damage or death.
The area in which the appliance is installed should not be used to store any other materials

23.8
ENTERING DISPLAY ACCESS USER PASSWORD
See section 20.0 display panel access
23.9
PARAMETER SETTINGS
The tables below show the parameters that can be changed by the user, these are
highlighted in green. All other parameters should only be changed by a competent
engineer.
Menu
GENERAL
TEMPERATURE
SETTINGS
DATA LOGGING
FUNCTIONS
DHW SETTINGS
23.9.1
Description
Vacation Mode (On/Off)
Time and Date
Software Version (read only)
Temperature Units (&deg;C/&deg;F)
SH Night Setback Offset
DHW Night Setback Offset
Display Timeout
Display Contrast
SH1 Set Point User
Minimum SH Set Point
Maximum SH Set Point
Offset SH1 Set Point
Differential SH1 Set Point
SH2 Set Point User
Offset SH2 Set Point
Differential SH2 Set Point
SH3 Set Point User
Offset SH3 Set Point
Differential SH3 Set Point
3-Way Valve Time
Reset Last 10 Errors
Service Mode Delay
Freeze Protection Pump On
Freeze Protection Burner On
Freeze Protection Burner
Differential
DHW Tank Set Point
Tank Set Point Differential
DHW Boiler Set Point
Boiler Set Point Offset
Boiler Set Point Differential
DHW Recirc Pump Offset
DHW Recirc Pump Differential
See
Section
21.1.1
21.1.2
21.1.4
21.1
21.1.9
21.2.1
21.2.1
21.2.1
23.5.2
User
Access
Yes
Yes
No
Yes
No
No
No
Yes
Yes
No
No
No
No
Yes
No
No
Yes
No
No
No
No
No
No
No
Installer
Access
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
SMART SYSTEM CONTROL PARAMETERS WITH USER ACCESS
91
92
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