11
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
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
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