Daikin Altherma 3 H HT ETSX16E7, Руководство по установке для специалистов

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10 | Configuration
Installer reference guide
222
EPRA14~18D + ETSH/X(B)16P30+50E
Daikin Altherma 3 H HT ECH₂O
4P679467-1B – 2022.09
▪ If Indirect (DHW + SH) is enabled: The boiler primarily covers or supports
domestic hot water heating (based on energy efficiency and operating
temperatures). Moreover, energy provided by the boiler is large enough to cover
the full building demand (F-07]=0), the switch-over between heat pump
operation and boiler operation for space heating is determined by the efficiency
calculation. If the boiler is intended solely for heat pump support ([F-07]=1),
primarily the heat pump is operation for space heating and the boiler is activated
to support in case of capacity shortage.
The switch-over between the heat pump system, parallel bivalent operation (if
applicable) and the auxiliary boiler is based on the following settings:
▪ [C‑03] and [C‑04]
▪ Electricity and gas prices ([7.5.1], [7.5.2], [7.5.3], and [7.6]) or PE factor [7-03]
▪ [F-02] (only for [C-02]=2/3)
[C‑03], [C‑04], T
calc
, and T
lim
For space heating switch-over: Based on the settings above, the heat pump system
calculates a value T
calc
, which is variable between [C‑03] and [C‑03]+[C‑04].
T
A
T
calc
[C-03]+[C-04]
3°C
[C-03]
a
b
T
A
Outdoor temperature
T
calc
Bivalent ON temperature (variable). Below this temperature, the auxiliary boiler will
always be ON. T
calc
can never go below [C‑03] or above [C‑03]+[C‑04].
3°C Fixed hysteresis to prevent too much switching between heat pump system and
auxiliary boiler
a Auxiliary boiler active
b Auxiliary boiler inactive
If the outdoor
temperature…
Then…
Space heating by the heat
pump system…
Bivalent signal for the
auxiliary boiler is…
Drops below T
calc
Stops Active
Rises above T
calc
+3°C Starts Inactive
# Code Description
9.C.3 [C-03] Range: –25°C~25°C (step: 1°C)
9.C.4 [C-04] Range: 2°C~10°C (step: 1°C)
The higher the value of [C‑04], the higher the
accuracy of the switch-over between the heat
pump system and the auxiliary boiler.
To determine the value of [C‑03], proceed as follows:
1 Determine the COP (= coefficient of performance) using the formula:
Formula Example
COP = (Electricity price / gas price)
(a)
×
boiler efficiency
If:
▪ Electricity price: 20 c€/kWh
▪ Gas price: 6 c€/kWh
▪ Boiler efficiency: 0.9
Then: COP=(20/6)×0.9= 3