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Certification reference
"Heat Pump" NF mark
NF 414 Rev 8 – Appendix C
Dual-mode
10/23
Moreover, a test report made by an independent laboratory accredited ISO 17025 must justified the following
data:
• Ratio of the static heat loss of the storage tank in compliance with the standard NF EN 15332 (Qpr, in
Wh per 24h for a difference of temperature of 45°C)
Note: In the standard, Qpr is also known as Qb
To finish, the following data have to be certified in heating mode for each model of the range of heating HP:
• Standby power (Psb, in W)
• Characteristics at operating point of the upstream temperature corresponding to the requirement of
the standard NF EN 16147 (i.e. 7°C for outdoor air / water) and at the following downstream
temperatures:
o 30_35°C
o 40_45°C
o 47_55°C if the maximal adjusted temperature (Tcmax) is higher or equal to 55°C
• At Tcmax with a ∆t de 5K if the maximal adjusted temperature is lower than 55°C (i.e. 49_54°C).
Simulated performances
Temperature stabilisation time (th)
th =
[(1 − α) × [4,2 × Vn + 4,25 × (M Ballon − M Ech )] + β × 0,38 × M Ech ]× (TCuve − 10)
3600 × (PDMT − 0,5 × 0,001 ×PP )
With:
• PDMT (in kW), the average of certified heating capacities at 30/35 and 40/45
• PP (in W), necessary heating capacity to compensate the static heat losses of the storage tank (here,
20 is the room temperature):
PP =
Vn × K R × (TCuve − 0,5 × THyst − 20)
24
With a steady cool rate KR1 in Wh/(24.l.K) (For a QPR in Wh/24h with a ∆t of 45°C):