Lochinvar LBF81 User manual

The LBF range

High Efficiency Gas Fired Water Heaters

User Instructions

INS0045 Issue No 1 | June 2013

Models:

LBF81

LBF121

LBF151

LBF171

LBF221

LBF301

LBF401

1.0 USER GUIDE

1.1 GENERAL REQUIREMENTS

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

& 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

The area around the viewing window may become hot during operation. Care should be used to

prevent direct contact with the viewing window and its immediate surroundings.

1.2 PROCEDURE FOR LIGHTING

1. Ensure that the gas-inlet appliance isolating valve is in the “off” position.

2. Press the power rocker switch, positioned on the front of the appliance next to the control thermostat, to

bring the equipment on.

3. Set the control thermostat to a value above that of the stored water.

4. The combustion fan should start and purge the combustion chamber. The spark generator should

create a spark and the gas solenoid should open. As the gas-inlet appliance isolating valve is closed the

appliance should go to a flame failure condition within 10 seconds this will be indicated by a red lock-out

light on the control panel.

5. If the above occurs correctly, open the gas-inlet appliance isolating valve and reset the unit by

depressing the red lock-out light on the control panel and a new ignition cycle will begin.

6. The combustion fan will repeat the pre-purge procedure and attempt to light. Once a flame is

established, the green ‘Burner On’ lamp, located on the control panel, willilluminate.

1.3 PROCEDURE FOR SHUTTING DOWN

To take the appliance out of service, the power rocker switch should be switched to the off position. If the

appliance in to be shut down fora long period of time, the gas supply should be isolated at the gas-inlet appliance

isolating valve.

1.4 TEMPERATURE ADJUSTMENT PROCEDURE

The setpoint can be adjusted using the dial thermostat on the control panel and monitored using the temperature

gauge.

The setpoint should be adjusted to ensure that the water is stored at 60°C and distributed at 50°C within 1 (one)

minute at all outlets. Care is needed to avoid much higher temperatures because of the risk of scalding. At 50°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 aspossible.

1.5 MAINTENANCE

Service intervals should be determined during the first months of operation. Details of this procedure can be found

in the Installation Commissioning and Maintenance Instructions for the appliance. If these instructions are not

available, a copy should be obtained from Lochinvar’s website www.lochinvar.ltd.uk or by using the contact details

on the back cover of this document.

Even if the maintenance schedule for the storage vessel 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. The

sacrificial magnesium anodes must be inspected at least once a year unless the Correx non-sacrificial

anode protection system is used, in which case there is no requirement to check the condition of the

sacrificial anodes.

A competent person should check and ensure that the flue system, ventilation to the plant room, 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 the Installation, Commissioning and Maintenance Instructions.

1.6 FROST PROTECTION

The LBF water heater has no built in frost protection system. Adequate protection must be provided to prevent the

water heater being exposed to freezing temperatures.

1.7 AIR SUPPLY

When installed in a compartment, the appliance compartment must be ventilated in accordance with

relevant standards.

Blocking these air vents may lead to severe injury, serious property damage or death.

The area in which the appliance is installed should notbe used to store any other materials.

1.8 FLAME FAILURE LOCKOUT

If the LBF water heater should go to a flame failure condition, reset the unit by depressing the red lock-out

light on the control panel and anew ignition cycle will begin.

The combustion fan will pre-purge and attempt to light. Once a flame is established, the green ‘Burner On’

lamp, located on the control panel, will illuminate. Should the water heater lock out again, a competent

engineer should be called to investigate the cause of the fault.

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