Commissioning; General; Preparatory Steps; Procedure - Dimplex LAK 10M Instructions D'installation Et D'utilisation

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.
The switch position on remote control must be set to "ON".
Proper condensate drainage must be ensured.

7.3 Procedure

The start-up of the heat pump is effected via the remote control.
Where an overflow valve is fitted to assure the minimum heating
water flow rate, the valve must be set in accordance with the spe-
cific requirements of the heating installation. An incorrect setting
may result in various error symptoms and an increased electric
power consumption. To correctly set the overflow valve, the fol-
lowing procedure is recommended for the "heating mode":
Close all of the heating circuits that may also be closed during
operation (depending on the type of heat pump usage) so that
the least favourable operating state - with respect to the water
flow rate - is achieved. Typically these are the heating circuits of
the rooms on the building's south and west sides. At least one
heating circuit must remain open (e.g. bathroom).
The overflow valve is to be opened to such an extent that based
on the current heat source temperature the maximum tempera-
ture spread between heating supply and return flow temperature
is obtained, as indicated in the table that follows. The tempera-
ture spread should be measured as closely to the heat pump as
possible. In mono-energetic systems, the electric heating ele-
ment is to be deactivated.
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
The following procedure must be observed so that the commis-
sioning activities can be carried out without any problems:
E-6
max. difference between
heating water supply and
return temperature
4 K
4 K
4 K
5 K
5 K
5 K
6 K
7 K
8 K
9 K
10 K
1) Close all heating circuits.
2) Open the overflow valve all the way.
3) Wait until the buffer tank has reached a temperature of ap-
prox. 25 °C.
4) Subsequently, slowly reopen the valves of the heating cir-
cuits, one after the other, in such a way that the heating
water flow rate is continually increased by slightly opening
the related heating circuit. When so doing, the heating water
temperature in the buffer tank must not fall below 20 °C so
that the heat pump can be defrosted at any time.
5) Once all heating circuit are fully open and a heating water
temperature of approx. 20 °C is maintained in the buffer
tank, the minimum flow rate must be set on the overflow
valve and the heating circulating pump.
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 tem-
perature level of the heating water can be set in the "ON" func-
tion. The switch position for cooling ( ) is not active, i.e. even
with the switch in this position, the heating pump is in heating op-
eration.
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)
4) Dial for selecting heating water setpoint temperature