Lochinvar LBT Series Guide

Installation manual_LBT_June 2020
Models:
LBT300
LBT3000
LBT500
LBT4000
LBT800
LBT5000
LBT1000
LBT6000
LBT1500
LBT8000
LBT2000
LBT10000
LBT2500
LBT
THERMAL STORE
Installation, Commissioning,
Maintenance and User
Instructions
READ AND UNDERSTAND THE INSTRUCTIONS
Read and fully understand all instructions before
attempting to operate maintain or install the unit.

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BLANK PAGE

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Contents
1.0 INTRODUCTION .............................................................................................................................................................................................................................................................3
2.0 SAFETY GUIDELINES.....................................................................................................................................................................................................................................................3
2.1 General description of safety symbols used ...............................................................................................................................................................................................................3
2.2 General ....................................................................................................................................................................................................................................................................3
3.0 TECHNICAL DATA ..........................................................................................................................................................................................................................................................4
3.1.1 Technical data ...................................................................................................................................................................................................................................................4
4.0 DIMENSIONS AND CONNECTION SIZES .......................................................................................................................................................................................................................4
4.1.1 Dimensional drawing..........................................................................................................................................................................................................................................4
4.1.2 Dimensions .......................................................................................................................................................................................................................................................5
4.1.3 Connection sizes ...............................................................................................................................................................................................................................................5
5.0 GENERAL REQUIREMENTS...........................................................................................................................................................................................................................................6
5.1 Related Documents ..................................................................................................................................................................................................................................................6
6.0 WATER QUALITY............................................................................................................................................................................................................................................................6
6.1 Vessel ......................................................................................................................................................................................................................................................................6
7.0 WATER CONNECTIONS .................................................................................................................................................................................................................................................6
7.1 General ....................................................................................................................................................................................................................................................................6
7.2 Storage Vessel .........................................................................................................................................................................................................................................................6
7.2.1 relief valve discharge pipework...........................................................................................................................................................................................................................6
7.2.2 relief valve discharge pipework...........................................................................................................................................................................................................................7
8.0 COMMISSIONING AND TESTING ...................................................................................................................................................................................................................................8
8.1 Electrical Installation .................................................................................................................................................................................................................................................8
8.2 Water Connection .....................................................................................................................................................................................................................................................8
8.3 Primary Heat Source.................................................................................................................................................................................................................................................8
8.4 Commissioning Check List ........................................................................................................................................................................................................................................8
9.0 WARRANTY ....................................................................................................................................................................................................................................................................9
10.0 DECLARATION OF PERFORMANCE............................................................................................................................................................................................................................10
11.0 MAINTENANCE.............................................................................................................................................................................................................................................................11
11.1 General ..................................................................................................................................................................................................................................................................11
11.2 1.1 Maintenance Schedule ......................................................................................................................................................................................................................................11
11.3 Other Checks..........................................................................................................................................................................................................................................................11
11.3.1 relief valve................................................................................................................................................................................................................................................11
11.4 Maintenance Record ...............................................................................................................................................................................................................................................11
11.5 Draining the LBT.....................................................................................................................................................................................................................................................11
11.6 Re-Filling the System ..............................................................................................................................................................................................................................................11
12.0 USER INSTRUCTIONS..................................................................................................................................................................................................................................................12
13.0 ERP DATA TABLE.........................................................................................................................................................................................................................................................12
14.0 COMMISSIONING CHECKLIST .....................................................................................................................................................................................................................................13
15.0 MAINTENANCE CHECKLIST.........................................................................................................................................................................................................................................13

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1.0 INTRODUCTION
The LBT is a thermal store for use with Renewable energy to provide a store of energy.
All installations must conform to the relevant Building Regulations. Health & 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 a 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.
2.0 SAFETY GUIDELINES
Carefully read all the instructions before commencing installation.
Keep these instructions near the water heater for quick reference.
A competent person must install this equipment. All installations must conform to the relevant Building Regulations.
Health & Safety requirements must also be taken into account when installing any equipment. Failure to comply with the
above may lead to prosecution.
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
This symbol shows essential information which is not safety related
2.2 General
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.
READ AND UNDERSTAND THE INSTRUCTIONS
Read and fully understand all instructions before attempting to operate maintain or install the unit.

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3.0 TECHNICAL DATA
3.1.1 TECHNICAL DATA
4.0 DIMENSIONS AND CONNECTION SIZES
4.1.1 DIMENSIONAL DRAWING
Description Unit LBT300 LBT500 LBT800 LBT1000 LBT1500 LBT2000 LBT2500
Storage Capacity litres 300 500 800 1000 1500 2000 2500
Empty Weight kg 55 77 109 125 194 263 296
Floor Load (weight unit + storage capacity) kg 355 577 909 1125 1694 2263 2796
Maximum Working Pressure Tank bar 5 5 5 5 5 5 5
Maximum Temperature Tank °C 95 95 95 95 95 95 95
Stand-by Loss W 68 114 133 125 146.5 189.5 n/a
Stand-by Loss kWh/ltr/day 1.62 2.74 3.18 3.01 3.516 4.548 n/a
Insulation Thickness mm 100 100 100 100 100 100 100
Insulation Material - Ecozero Ecozero Ecozero
Fire Class - HBF HBF HBF HBF b1 b1 b1
Description Unit LBT3000 LBT4000 LBT5000 LBT6000 LBT8000 LBT10000
Storage Capacity litres 3000 4000 5000 6000 8000 10000
Empty Weight kg 346 492 582 684 823 973
Floor Load (weight unit + storage capacity) kg 3346 4492 5582 6684 8823 10973
Maximum Working Pressure Tank bar 5 5 5 5 5 5
Maximum Temperature Tank °C 95 95 95 95 95 95
Stand-by Loss W n/a n/a n/a n/a n/a n/a
Stand-by Loss kWh/ltr/day n/a n/a n/a n/a n/a n/a
Insulation Thickness mm 100 100 100 100 100 100
Insulation Material - Ecozero Ecozero Ecozero Ecozero Ecozero Ecozero
Fire Class - b1 b1 b1 b1 b1 b1
Flexible Polyurethane with PVC outer jacket

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4.1.2 DIMENSIONS
4.1.3 CONNECTION SIZES
Size Description Unit LBT300 LBT500 LBT800 LBT1000 LBT1500 LBT2000 LBT2500
A Connection ASHP return mm 325 345 290 290 360 390 425
B Height of Tank body connection mm 695 715 660 780 810 930 865
C Height of Tank body connection mm 1065 1085 1030 1270 1260 1470 1305
D Connection ASHP flow mm 1435 1455 1400 1760 1710 2010 1745
E Height of Immersion heater connection mm 880 975 845 1020 1085 1200 1145
H Total Height (with insulation) mm 1680 1715 1740 2100 2140 2470 2220
H Height of AAV Connection mm 1680 1715 1740 2100 2140 2470 2220
De Diameter of Water Heater (with insulation) mm 610 710 990 990 1240 1340 1450
Size Description Unit LBT3000 LBT4000 LBT5000 LBT6000 LBT8000 LBT10000
A Connection ASHP return mm 435 480 510 635 625 625
B Height of Tank body connection mm 1035 1080 1110 1155 1385 1635
C Height of Tank body connection mm 1635 1680 1710 1675 2145 2645
D Connection ASHP flow mm 2235 2280 2310 2195 2905 3655
E Height of Immersion heater connection mm 1435 1430 1510 1415 1615 2365
H Total Height (with insulation) mm 2720 2810 2870 2790 3490 4240
H Height of AAV Connection mm 2720 2810 2870 2790 3490 4240
De Diameter of Water Heater (with insulation) mm 1450 1600 1800 2000 2000 2000
Size Description Unit LBT300 LBT500 LBT800 LBT1000 LBT1500 LBT2000 LBT2500
sa Connection Air vent BSP 1" 1" 1" 1" 1" 1" 1"
g Connection Tank body BSP 1¼" 1¼" 1¼" 1¼" 1¼" 1¼" 1¼"
mc Connection ASHP flow BSP 1¼" 1¼" 1½" 1½" 1½" 1½" 2"
rc Connection ASHP return BSP 1¼" 1¼" 1½" 1½" 1½" 1½" 2"
mi Connection heating system flow BSP 1¼" 1¼" 1½" 1½" 1½" 1½" 2"
ri Connection heating system return BSP 1¼" 1¼" 1½" 1½" 1½" 1½" 2"
rp Connection alternate heating system return BSP 1¼" 1¼" 1½" 1½" 1½" 1½" 2"
sc Connection Drain BSP 1¼" 1¼" 1½" 1½" 1½" 1½" 2"
sd Connection sensor point BSP ½" ½" ½" ½" ½" ½" ½"
z Connection Immersion heater BSP 1½" 1½" 1½" 1½" 1½" 1½" 1½"
Size Description Unit LBT3000 LBT4000 LBT5000 LBT6000 LBT8000 LBT10000
sa Connection Air vent BSP 1" 1" 1" 1" 1" 1"
g Connection Tank body BSP 2" 2" 2" 2" 2" 2"
mc Connection ASHP flow BSP 2" 2" 2" 3" 3" 3"
rc Connection ASHP return BSP 2" 2" 2" 3" 3" 3"
mi Connection heating system flow BSP 2" 2" 2" 3" 3" 3"
ri Connection heating system return BSP 2" 2" 2" 3" 3" 3"
rp Connection alternate heating system return BSP 2" 2" 2" 3" 3" 3"
sc Connection Drain BSP 2" 2" 2" 3" 3" 3"
sd Connection sensor point BSP ½" ½" ½" ½" ½" ½"
z Connection Immersion heater BSP 1½" 1½" 1½" 1½" 1½" 1½"

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5.0 GENERAL REQUIREMENTS
The Lochinvar LBT thermal store 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. PLEASE read the instructions fully before
installing or using the appliance. These instructions should be read in conjunction with the appropriate Heat pump
installation manual.
5.1 Related Documents
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:
BS 6700: 1997 Design, installation, testing and maintenance of services supplying water for domestic use within
buildings and their curtilages
BS 7074: 1989 Application, selection and installation of expansion vessels and ancillary equipment for
Parts 1 and 2 sealed water systems. Code of practice for domestic heating and hot water supply
BS 7671: 2008 Requirements for electrical installations, I.E.E. wiring regulations seventeenth edition
CP 342: Code of practice for centralised hot water supply-buildings other than dwellings
Part 2 1974
6.0 WATER QUALITY
6.1 Vessel
On systems where the LBT is working with Heat Pumps, CHP, Gas condensing boilers or any other direct heat source then
the LBT should be treated as per the rest of the system. See main heat source ICM for further guidance.
7.0 WATER CONNECTIONS
7.1 General
1. Circulating pipework should be insulated; cisterns, expansion vessels and pipework situated in areas exposed to
freezing conditions should also be insulated.
2. Drain valves must be located in accessible positions that will permit draining of the entire system.
3. Individual valves should be fitted to each unit to enable isolation from the system.
7.2 Storage Vessel
The safety valve must be rated no higher than 5 bar. There must be no isolating valves between the LBT
and this safety valve.
The connections used will depend upon the system the LBT is fitted to; you must consult the relevant drawing and /or ICM
instructions for the Solar thermal or Heat pump also being installed.
7.2.1 RELIEF VALVE DISCHARGE PIPEWORK
It is important that any discharge water does not collect in the discharge pipe-work and can run freely to the tundish. The
tundish should be mounted in a vertical and visible position located in the same space as the unvented hot water storage
system and be fitted as close as possible and within 600mm of the safety device e.g. the temperature relief valve.
The discharge pipe from the tundish should terminate in a safe place where there is no risk to persons in the vicinity of the
discharge, be of metal or other material that has been demonstrated to be capable of safely withstanding temperatures of
the water discharged and is clearly and permanently marked to identify the product and performance standard, and:

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a) Be at least one pipe size larger than the nominal outlet size of the safety device unless its total equivalent hydraulic
resistance exceeds that of a straight pipe 9m long i.e. discharge pipes between 9m and 18m equivalent resistance
length should be at least two sizes larger than the nominal outlet size of the safety device, between 18 and 27m at
least 3 sizes larger, and so on. Bends must be taken into account in calculating the flow resistance.
An alternative approach for sizing discharge pipes would be to follow BS6700 Specification for design installation, testing
and maintenance of services supplying water for domestic use within buildings and their curtilages.
b) Have a vertical section of pipe at least 300mm long, below the tundish before any elbows or bends in the pipework.
c) Be installed with a continuous fall of at least 1 in 200.
d) Have discharges visible at both the tundish and the final point of discharge but where this is not possible or is
practically difficult there should be clear visibility at one or other of these locations.
Examples of acceptable discharge arrangements are:
I. Ideally below the fixed grating and above the water seal in a trapped gulley.
II. Downward discharges at a low level; i.e. up to 100mm above external surfaces such as car parks, hard standings,
grassed areas etc. are acceptable providing that where children play or otherwise come into contact with
discharges, a wire cage or similar guard is positioned to prevent contact whilst maintaining visibility.
III. Discharges at a high level; e.g. into a metal hopper and metal down pipe with the end of the discharge pipe clearly
visible (tundish visible or not) or onto a roof capable of withstanding high temperature discharges of water and 3m
from any plastic guttering systems that would collect such discharges (tundish visible).
IV. Where a single pipe serves a number of discharges, such as in blocks of flats, the number served should be limited
to not more than 6 systems so that any installation can be traced reasonably easily. The single common discharge
pipe should be at least one pipe size larger than the largest individual discharge pipe to be connected. If unvented
hot water storage systems are installed where discharges from safety devices may not be apparent i.e. in dwellings
occupied by blind, infirm or disabled people, consideration should be given to the installation of an electronically
operated device to warn when discharge takes place.
7.2.2 RELIEF VALVE DISCHARGE PIPEWORK
TUNDISH
METAL DISCHARGE PIPE (D1) FROM
TEMPERATURE RELIEF VALVE
TO TUNDISH
SAFETY DEVICE
(e.g. TEMPERATURE
RELIEF VALVE)
DISCHARGE PIPE (D2) FROM
TUNDISH, WITH CONTINUOUS FALL
FIXED GRATING
TRAPPED GULLY
DISCHARGE IDEALLY BELOW
FIXED GRATING
300mm MINIMUM
600mm MAXIMUM

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8.0 COMMISSIONING AND TESTING
8.1 Electrical Installation
Any ancillary item that requires an electrical supply should be installed and commissioned as per instructions.
8.2 Water Connection
For design, see Section 5: Water connections
The system should be thoroughly flushed out with cold water without any circulating pumps in position.
Ensure all the valves are open.
8.3 Primary Heat Source
The primary heat source operating in conjunction with the LBT Thermal store should be installed and commissioned in
accordance with the relevant ICM Instructions provided.
8.4 Commissioning Check List
Failure to follow and complete the commissioning procedure and checklist will invalidate all warranties.
See page 15 for checklist

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9.0 WARRANTY
Models
Warranty Period
Maximum working temperature/pressure
All models
Vessel
2 years
Maximum working temperature/Pressure within the Vessel:
95°C/5Bar
Other
Components
1 year
General Warranty
Our warranty is to provide a replacement component in exchange for the return of the defective component and is
subject to an audit upon receipt of the faulty component. Replacement components must be paid for in full prior to
dispatch unless we agree otherwise. The warranty does not include any labour costs or carriage of the returned
component. If (after verification and at the sole discretion of Lochinvar Limited) a component or part of the LBT Thermal
store supplied by Lochinvar Limited proves, within 24 months from the date of delivery of the original appliance to be
defective or fails to function correctly due to manufacturing and/or material defects, then Lochinvar Limited shall repair or
replace this component or part.
Conditions for installation and use
The warranty set out above will apply solely under the following conditions:
a) The warranty is subject to the LBT Thermal store being installed, and maintained in accordance with the relevant
Installation Commissioning and Maintenance Instructions and does not cover failures due to deliberate misuse,
malicious damage, neglect, unauthorised alterations or repairs, accidental damage or third party damage.
b) The LBT Thermal store remains installed at the original site of installation.
c) Working temperature must be no greater than 95°C, and MWP pressures must not exceed the figures given in the
table above.
Exclusions
The warranty set out above will not apply in the event of damage to the LBT Thermal store caused by an external factor
such as:
a) Damage occurring during transport, lifting or installation.
b) Misuse, neglect (including frost damage), modification, incorrect and/or unauthorised use of the LBT Thermal store
and any attempt to repair leaks;
c) Contaminants or other substances having been allowed to enter the LBT Thermal store
d) Unfiltered, recirculated water flowing through the LBT Thermal store
e) Any fault arising due to inadequate water quality or insufficient cleansing of the heating system is not covered by the
warranty.
Scope of the warranty
The obligations of Lochinvar Limited by virtue of the warranty provided do not extend beyond delivery free of charge from
the warehouse of the parts or components of the LBT Thermal store to be replaced; transport (including crane hire),
labour, installation and other costs associated with the replacement shall not be borne by Lochinvar Limited.

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10.0 DECLARATION OF PERFORMANCE
EEC-Declaration of Conformity
Supplier: Lochinvar Limited
7 Lombard Way
The MXL Centre
Banbury, United Kingdom
Hereby declares that the following products:
Product Description: Storage Vessel
Product Models: LBT Range
Have been manufactured, inspected and pressure tested in accordance with the requirement of the:
European Pressure Equipment Directive (PED) 97/23/EC,
Article 3, Paragraph 3 of DL 25, Feb.2000, n 93
Conditions of use:
1. The installation instructions have been followed
2. Fluids being passed through the heat exchanger are non-hazardous in the group 2 category
3. The maximum working pressures and temperatures as noted on the equipment data plate are not exceeded.

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11.0 MAINTENANCE
11.1 General
Regular servicing is required, to ensure trouble free operation. Even if a maintenance schedule is determined to be less
than annually, it is important that all controls and safety features be checked for correct operation on an annual basis.
Failure to follow and complete the maintenance procedure and checklist will invalidate all warranties.
See page 12
11.2 1.1 Maintenance Schedule
It is good practice to service the LBT every 12 months. Lochinvar Limited recommend that this is the maximum service
interval, however in hard water areas; it may be necessary to reduce this time period to ensure correct operation of the
storage vessel and associated equipment.
11.3 Other Checks
11.3.1 RELIEF VALVE
At least once a year, the temperature and pressure relief valve and safety valve should be checked to ensure that they are
in operating condition. To check each valve, lift the lever or turn the screw cap at the end of the valve several times. The
valve should operate freely and seat properly.
If water does not flow, remove and inspect for obstructions or corrosion. Replace with a new valve of the recommended
size as necessary.
11.4 Maintenance Record
The maintenance record found on page 12
11.5 Draining the LBT
The following procedure must be observed to prevent damage to the LBT and ancillary items connected to it.
1. Ensure any heat source connected to the LBT is either turned off or disconnected from the LBT if safe to do so.
(check the ICM of the heat source before any further action is taken)
2. Turn off the water if applicable.
3. Connect a hose to the system drain valve.
4. Locate hose’s discharge in an area where hot water will not cause any damage or injury.
5. Open the drain valve.
6. If the vessel is being drained for an extended shutdown, it is suggested the drain valve be left open during this
period.
11.6 Re-Filling the System
1. Close the drain valve.
2. Open the cold water supply to water heater and allow the vessel to fill.
3. Check automatic air valve on top of the LBT is operating correctly
4. Check for water leakage.
HAS THE PRIMARY HEAT SOURCE CONNECTED TO THE LBT BEEN SERVICED
WHAT IS THE MAXIMUM WORKING PRESSURE OF THE PRIMARY HEAT SOURCE(s)
CHECK T&P VALVE (IF FITTED) TO THE BODY OF THE LBT
CHECK ANY AUTOMATIC TOP UP EITHER DIRECTLY OR VIA THE HEATING CIRCUIT IS OPERATIONAL
CHECK EXPANSION VESSEL FITTED TO BODY OF LBT
CHECK CONDITION OF LBT FOR SIGNS OF LEAKING
CHECK CONDITION OF LBT INSULATION FOR DAMAGE
IS THERE ANY SIGNS OF SCALING
CHECK WATER TREATMENT IS STILL OPERATIONAL
CHECK OPERATION OF THERMOSTAT AND ANY ALLIED VALVES
CHECK OPERATION OF HIGH LIMIT AND ANY ALLIED VALVES

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12.0 USER INSTRUCTIONS
Your LBT Thermal store has been designed to give many years of trouble free service.
Warning: If cold/warm water exits from the temperature and pressure relief valve (TPV) or from the
pressure relief valve (PRV) call your installer. If very hot water exits from either valve, switch off the heat
source immediately and isolate the electricity supply to the cylinder and separate heat source.
13.0 ERP DATA TABLE
Information
Symbol
Unit
Value
Trade mark
-
-
Lochinvar Limited
Model Identifier
-
-
LBT300
LBT500
LBT800
LBT1000
LBT1500
LBT2000
Energy efficiency
class
-
-
B
C
C
C
C
C
Standing loss
-
W
67.7
114.1
132.7
125.4
146.5
189.5
Storage volume
-
liters
300
500
800
1000
1500
2000

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14.0 COMMISSIONING CHECKLIST
15.0 MAINTENANCE CHECKLIST
WHAT PRIMARY HEAT SOURCE IS CONNECTED TO THE LBT
SOLAR THERMAL
AIR SOURCE HEAT PUMP
GAS CONDENSING BOILERS
OTHER-PLEASE SPECIFY
WHAT IS THE MAXIMUM FLOW/RETURN TEMPERATURE OF THE PRIMARY HEAT SOURCE(s)
FLOW
RETURN
WHAT IS THE MAXIMUM WORKING PRESSURE OF THE PRIMARY HEAT SOURCE(s)
HAS A T&P VALVE BEEN FITTED TO THE BODY OF THE LBT
IF YES IS THE LBT CONNECTED TO AN AUTOMATIC TOP UP EITHER DIRECTLY OR VIA THE HEATING CIRCUIT

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NOTES

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