100
OCH714D
Annual Maintenance Log Book
Contractor name
Engineer name
Site name
Site number
Cylinder unit maintenance record sheet
Warranty number
Model number
Serial number
No.
Mechanical
Frequency
Notes
1
Turn OFF water supply, drain DHW tank, remove mesh from strainer
clean and replace in strainer. *1
2
Keep water supply OFF, open hot water taps and check the primary-side
expansion vessel charge pressure. Top up if necessary (1 bar).
3
Keep water supply OFF and check the potable vessel charge pressure.
Top up if necessary (3.5 bar).
4
Keep water supply OFF. In hard water areas de-scaling of the immersion
heaters may be required.
5
Drop the primary/heating system pressure to zero check and if necessary
top up the expansion vessel (1 bar). Air valve of expansion vessel is
TR-412.
6
Turn water supply ON, open the pressure relief valve and then the
expansion relief valve in turn. Check for unrestricted discharge to the
tundish and that the valves reseat correctly. Check there are no block-
ages in the tundish and associated pipework.
7
Check and if necessary top up the concentration of anti-freeze/inhibitor (if
used in the system).
8
Top up the primary/heating system using a temporary backflow preven
-
tion filling loop and re-pressurise to 1 bar.
9
Heat system and check pressure does not rise above 3 bar and no water
is released from the safety valves.
10
Release any air from the system.
11
To check the 3-way valve for inside leaks, confirm that the temperature of
the heat emitter does not rise when running the DHW mode.
Refrigerant models only [except EHPT20 series]
Frequency
Notes
1
Refer to outdoor unit manual.
Electrical
Frequency
Notes
1
Check condition of cables.
2
Check rating and fuse fitted on the electricity supply.
Controller
Frequency
Notes
1
Check field settings against factory recommendations.
2
Check operation of motorized valves ensure they reseat correctly.
3
Check battery power of wireless thermostat and replace if necessary.
Outdoor heat pump unit maintenance record sheet
Model number
Serial number
Mechanical
Frequency
Notes
1
Inspect grill and air inlet for trapped debris/damage.
2
Check condensate drain provision.
3
Check integrity of water pipework and insulation.
4
Check all electrical connections.
5
Check and record the operation voltage.
* Checks should be carried out once a year.
*1 Be sure to reattach the mesh after washing.
Note: Within the first couple of months of installation, remove and clean the cylinder unit’s strainer mesh plus any that are fitted external to the cylinder
unit. This is especially important when installing on an existing system.
In addition to annual servicing, it is necessary to replace or inspect some parts after a certain period of system operation. Please see tables below for detailed instruc
-
tions. Replacement and inspection of parts should always be done by a competent person with relevant training and qualifications.
Parts which require regular replacement
Parts
Replace every Possible failures
Pressure relief valve (3 bar)
Air vent (Auto/Manual)
Drain cock (Primary/Sanitary circuit)
Manometer
Inlet control group (ICG)*
Mud trap
6 years
Water leakage
*
OPTIONAL PARTS for UK
Parts which require regular inspection
Parts
Check every
Possible failures
Pressure relief valve (3bar)
Temperature and pressure
relief valve
1 year
(turning the knob
manually)
PRV could seize and risk
burst of expansion ves
-
sel
Immersion heater
2 years
Earth leakage causing
circuit breaker to activate
(Heater is always OFF)
Water circulation pump
(Primary circuit)
20,000 hrs (3 years) Water circulation pump
failure
Magnetic filter
3 years
Flow rate decrease due
to clogging
Mud trap
1 year
Flow rate decrease due
to clogging
Parts which must NOT be re-used when servicing
* O-ring
* Gasket
Note:
•
Always replace the gasket for pump with a new one at each regular mainte-
nance (every 20,000 hours of use or every 3 years).
