Capacity Tables; Cooling Capacity Tables - Daikin Altherma ERHQ006-008AD Technical Data Manual

3

Capacity tables

3 - 1 Cooling capacity tables

The ALTHERMA by Daikin heat pump in combination with the optional domestic hot water tank provide hot water for household usage.
The below mentioned date allow a proper selection of the domestic hot water tank size for maximum comfort and efficiency.
(1) Domestic hot water volume:
The volume of hot water available for domestic usage depends on the physical volume of the tank, on the domestic water setpoint temperature and on the temperature spreading
in the tank.
Therefore we define the equivalent hot water volume (EHWV).
Definition:
EHWV = the volume of hot water available for domestic usage at a temperature of 40°C.
40°C is considered a comfortable domestic hot water temperature.
Tank
4
150L
3
200L
300L
Grade ++ Excessive availability of domestic hot water.
+ Sufficient availability of domestic hot water.
- Temporary shortage of domestic hot water can occur.
Usage pattern Modest
Medium Daily demand up to 325 l -> typical 3 to 4 persons usage pattern.
High
(2) Heat-up time:
Definition:
Heat-up time The time required to reheat the domestic hot water tank to 55°C after tapping a certain volume of hot water at 40°C.
note: changing the field settings (see installation manual) can influence the heat-up time.
Tank
150L
200L
300L
Conditions for testing: Ta = 7°CDB / 6°CWB, Troom = 20°C, Tstart = 10°C, outdoor unit type: ERHQ011
(3) Efficiency of domestic hot water production:
In the ALTHERMA by Daikin system both the heat pump and the electric booster heater supply the energy to produce domestic hot water.
The higher the portion of energy supplied by the heat pump, the more energy efficient the system is.
Lowering the setpoint temperature increases the portion of energy supplied by the heat pump and thus the efficiency of the system.
Definition:
Heat pump portion Percentage of energy supplied by the heat pump in the total energy need for domestic hot water.
Conditions: Real life condition
Outdoor temperature
Room temperature
Outdoor unit type
Tank type
Field settings
(4) Heat losses of domestic hot water tank:
Tank Heat losses*
EKHWE [kWh/24h]
150L 1.7
200L 1.9
300L 2,5
* Heat losses at _45°C between hot water in tank and surrounding air.
248
• Domestic hot water tank • EKHWE
Setpoi n t temp.
EHWV (l)
(°C)
55 125
65 165
75 185
55 200
65 230
75 260
55 320
65 400
75 435
Daily demand up tp 220 l -> typcial 2-persons usage pattern.
Daily demand up to 550 l -> 4 to 6 persons usage pattern.
Setpoint temp. Heat-up time for 150 L (bath)
(°C) <min>
55 60
55 60
55 50
Setpoint temp. (°C)
Simulation of a daily usage based upon 'medium' usage pattern.
7°CDB / 6°CWB
20°CDB
ERHQ011
200l
Default field settings (see installation manual).
TM
• Altherma • Domestic hot water tank
Usage pattern
Modest Medium
- -
+ -
++ +
+ -
++ +
++ ++
++ ++
++ ++
++ ++
Heat-up time for 50 L (shower)
<min>
45
40
30
High
-
-
-
-
-
-
-
+
++
4TW57859-1