Power Regulation; Heat Pumps With One Compressor; Heat Pumps With Two Compressors - Pco WPM 2006 plus Notice De Montage Et De Mise En Service

Program Description
Block by request for swimming pool water:
If the temperature in the cylinder is higher than 35 °C (value is
adjustable from 10 – 50 °C in the menu Settings - 2nd heat
generator - Overtemperature), the heat pump is blocked by a
pending request for swimming pool water. It is not enabled again
until the temperature in the buffer tank connected in parallel is 5K
under the switching temperature.
As soon as one of the three blocks described occurs, the heat
pump is blocked, and the following message is displayed: HP
waiting, Block BR. The output of the 2nd heat generator is not
activated.

9.5 Power Regulation

The heat pump manager can define a maximum of 3 power
stages, L1, L2 and L3, which it switches depending on the heat
consumption. Rising heat consumption causes the next highest
power stage to be switched, falling heat consumption the next
lowest.
L1: Heat pump operates with one compressor
L2: Heat pump operates with two compressors
9.5.1

Heat Pumps with one Compressor

Criteria for a switchover:
From L1 to L3 if the heating controller demands "more heat"
for more than 60 minutes and the external temperature is
simultaneously under the limit temperature of the 2nd heat
generator for more than 60 minutes.
9.5.2

Heat Pumps with Two Compressors

Criteria for a switchover:
From L1 to L2 if the heating controller demands "more heat"
for more than 25 minutes,
From L2 to L3 if the heating controller demands "more heat"
for more than 60 minutes and the external temperature is
simultaneously under the limit temperature for more than
60 minutes.
From L3 to L2 or L1 if the heating controller demands "less
heat" for more than 15 minutes or the limit temperature is
overshot.
Power stage
Stage L1
Stage L2
Stage L3
Defrost
DHW heating
Swimming pool heating
Heat pump with
one compressor
One compressor switching only
-
One compressor and 2nd heat generator, if
required
Compressor running
Compressor running
Compressor running
Mixer control:
If there is no block by bivalent-regenerative, the mixer is switched
to continuously CLOSED.
If there is a bivalent-regenerative block because of domestic hot
water or swimming pool, the mixer is switched to continuously
OPEN.
If there is a bivalent-regenerative block because of heating,
mixer regulation is active.
L3: Heat pump operates and 2ndheat generator is active
(not with monovalent systems)
The heat pump manager always starts in power stage L1
after start-up or a power failure.
The power stages are not redefined during defrosting,
preparation of swimming pool water, a request for domestic
hot water or a utility block.
From L3 to L1 if the heating controller demands "less heat"
for more than 15 minutes or the limit temperature is
overshot.
From L2 to L1 if the heating controller demands "less heat"
for more than 15 minutes.
In power stage L1, one of the heat pump's compressors is
switched on or off according to the "more" or "less" signals from
the heating controller. In stage L2, one of the heat pump's
compressors operates continuously to cover the base load. The
second compressor is switched on or off according to the "more"
or "less" signals from the heating controller. In stage L3, both
compressors operate continuously to cover the increased base
load. The 2nd heat generator is regulated. Only one compressor
ever operates during defrosting.
two compressors
One compressor switching only
1 compressor base load, 1 compressor
switching
Both compressors and 2nd heat generator
One compressor running
One or two compressors running depending on
the external temperature
One or two compressors running depending on
the setting
9.5
Heat pump with
E-29