Commissioning; General; Preparatory Steps; Procedure - Dimplex LA 6 MR Installation And Operating Instructions Manual

7
7

Commissioning

7.1 General

To ensure proper commissioning it should be carried out by an
after-sales service authorized by the manufacturer. This will lead,
under certain circumstances, to an extension of the warranty pe-
riod (cf. Warranty).

7.2 Preparatory Steps

Prior to commissioning, the following items need to be checked:
 All connections of the heat pump must have been made as
described in Chapter 6.
 In the heating circuit all valves that could impair the proper
heating water flow must be open.
 The air intake/discharge path must be unobstructed.
 The sense of rotation of the fan must correspond to the di-
rection of the arrow.
 An operating mode must have been set on the remote con-
trol.
 Proper condensate drainage must be ensured.

7.3 Procedure

The heat pump is started up via the heat pump manager. Adjust-
ments should be made in compliance with the instructions.
If an overflow valve is fitted to maintain the minimum heat-
ing water flow rate, the valve must be adapted to the require-
ments of the heating system. Incorrect adjustment can lead to
faulty operation and increased energy consumption. We recom-
mend carrying out the following procedure to correctly adjust the
overflow valve:
Close all of the heating circuits that may also be closed during
operation (depending on the type of heat pump usage) so that
the most unfavorable operating state - with respect to the water
flow rate - is achieved. This normally means the heating circuits
of the rooms on the south and west sides of the building. At least
one heating circuit must remain open (e.g. bathroom).
The overflow valve should be opened far enough to produce the
maximum temperature spread between the heating flow and re-
turn flow listed in the following table for the current heat source
temperature. The temperature spread should be measured as
close as possible to the heat pump. The heating element of mono
energy systems should be disconnected during start up.
Heat source
temperature
from to
-20° C -15° C
-14° C -10° C
-9° C -5° C
-4° C 0° C
1° C 5° C
6° C 10° C
11° C 15° C
16° C 20° C
21° C 25° C
26° C 30° C
31° C 35° C
EN-6
max. difference between
heating water supply and
return temperature
4 K
5 K
6 K
7 K
8 K
9 K
10 K
11 K
12 K
13 K
14 K
At hot water temperatures under 7° C, start-up is not possible.
The water in the buffer tank must be heated to a minimum
of 18 °C with the second heat generator.
To ensure a problem-free start-up, the following procedure is to
be implemented:
1) Close all consumer circuits.
2) Ensure that the heat pump has the correct water flow.
3) Use the manager to select the automatic operating mode.
4) In the special functions menu, start the "Start-up" program.
5) Wait until a return temperature of at least 25 °C has been
reached.
6) Now slowly reopen the heating circuit valves in succession
so that the heating water flow is constantly raised by slightly
opening the respective heating circuit. The heating water
temperature in the buffer tank must not be allowed to drop
below 20 °C during this process. This ensures that the heat
pump can be defrosted at any time.
7) When all heat circuits are fully open and a return tempera-
ture of at least 18° C is maintained, the heat pump start-up
is complete.
ATTENTION!
Operating the heat pump at low system temperatures may cause the heat
pump to break down completely. After a prolonged power failure, the
commissioning procedure detailed above must be followed.
8

Functional Description

8.1 Heat Pump Remote Control
Unit
The heat pump can be switched on and off by means of the re-
mote control positioned inside the building. Switching off in this
case means switching to a "standby" function, i.e. as long as the
heat pump is supplied with mains power, the frost protection
function of the heat pump remains active. If the water tempera-
ture is too low, first the heating circulating pump, and if this is not
enough, also the compressor must be put in operation. The re-
mote control allows you to set the heating or cooling operating
mode (the switchover delay from the heating to the cooling
mode, or vice-versa, is 10 min.) as well as the temperature level
of the heating water.
1) Switch On/Standby
2) LED (green) is illuminated regardless of the switch position
(indicates operational readiness of heat pump)
3) Switch "Heating" (left side depressed)
Switch "Cooling" (right side depressed)
4) Dial for selecting heating water setpoint temperature