Dimplex LA 12 MI, Installation & Technical Manual

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Page 31
Section 9: System Health checks
The following items should be verified to ensure
efficient operation of the system:
Heat pump

Check the fan is clear from debris.

No abnormal sound during operation.
Electrical

Power cable is firmly fixed.

Earth wire connection is secure.

RCCB operation is normal.

Supply voltage is correct.
Hydraulic

Water pressure higher than 0.05 MPa.

Pressure relief valve operation is normal.

The filter is clear of debris.

Check entire system for leaks.
Cylinder

Set temperature is correct for efficient
operation.

Check the high temperature cut out stat on
the cylinder immersion and buffer immersion
have not tripped.

Temperature and pressure relief is operating
correctly.
For full maintenance details for the cylinder consult the
relevant instruction manual.
Wall mounted thermostat

Every 2 years, replace the battery on the
Horstmann PRT1

Heating operation normal.

The set temperatures and heating periods are
suitable for the tenants life style.
Heat pump controller

LCD control panel operation is normal.

Enquire if the user is warm enough and
reduce the weather compensation curve to
maximise the heat pump efficiency.
Section 10: Standard packages
To assist with the design and installation of a system
Dimplex have collated wiring and hydraulic schematics
for the following designs:
Package 1 and 2

Heating and Domestic hot water preparation is done
using the heat pump.

2 x two port valves are used to switch between
heating and DHW preparation.

Room temperature is time and temperature
controlled using the Horstmann wall mounted
thermostat. The thermostat will create a demand if
the temperature drops below 15

C whilst the system
is off to prevent the base temperature dropping too
low.

DHW temperature and time period is set using the
Heat pump controller.
Package 3

Package for space heating only so no hot water
cylinder is included.

Buffer cylinder is required to ensure minimum
water volume.

Room temperature is time and temperature
controlled using the Horstmann wall mounted
thermostat. The thermostat will create a demand if
the temperature drops below 15

C whilst the
system is off to prevent the base temperature
dropping too low.
Never use cleaning agents containing sand,
soda, acid or chloride as these can damage
the surfaces.
Before opening the device, ensure that all
circuits are isolated from the power supply.
Any work on the heat pump may only be
performed by authorised and qualified after-
sales service technicians.