Connecting An Intelligent Controller (Smart Grid - Sg); Connection For Refrigerant; Laying Refrigerant Lines - Daikin Altherma EHSX04P50D Installations- Und Wartungsanleitung

▪ For the NC contact version, the [HT/NT connection] parameter = 1
must be set [→ Main menu → Settings → Inputs/Outputs]. When
the electricity supply company sends the off-peak signal, switching
contact S2S is opened. The system switches to "Mandatory OFF".
If the signal is sent again, potential-free switching contact S2S
closes and the system resumes operation.
▪ For the NO contact version, the [HT/NT connection] parameter = 0
must be set [→ Main menu → Settings → Inputs/Outputs]. When
the electricity supply company sends the off-peak signal, switching
contact S2S is closed. The system switches to "Mandatory OFF".
If the signal is sent again, potential-free switching contact S2S
opens and the system resumes operation.
[HT/NT connection] =
1
Fig. 4-44 Connection of the H/NT switch contact
Item Designation
1 Mains connection box for off-peak mains connection
2 Receiver for evaluating the HT/NT control signal
3 Power supply of the heat pump outdoor unit (see re-
spective installation instructions for the heat pump out-
door unit)
4 Potential-free switching contact for heat pump indoor
unit
Tab. 4-8
4.7.15 Connecting an intelligent controller
(Smart Grid - SG)
As soon as the function is activated through the [Smart Grid] para-
meter = 1 [→ Main menu → Settings → Inputs/Outputs] (see Con-
troller operating instructions), the heat pump is switched to stand-by,
normal or a mode at higher temperatures depending on the utility
company signal.
For this purpose, the floating switching contacts SG1/SG2 of the in-
telligent controller must be connected to connector J8, connections
Smart Grid and EVU, on the RoCon BM2C printed circuit board (see
Fig. 4-45).
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN
[HT/NT connection] =
0
4
As soon as the function is active, the HT/NT function is automatically
deactivated. The heat pump is operated differently depending on the
value of the [Modus Smart Grid] parameter [→ Main menu → Set-
tings → Inputs/Outputs] (see Controller operating instructions).
Fig. 4-45 Connecting the Smart Grid
4.8

Connection for refrigerant

INFORMATION
Follow the installation instructions for the outdoor unit.
4.8.1

Laying refrigerant lines

CAUTION
The use of refrigerant lines that have already been used
can lead to damage to the unit.
▪ Do not reuse a refrigerant line that has been used with
another refrigerant. Replace or carefully clean the refri-
gerant line.
▪ Check if an oil trap bend for the refrigerant line is necessary.
▪ Required if Daikin Altherma EHS(X/H) is not installed at ground
level to the external heat pump unit
▪ At least one oil trap bend must be installed for every 10 m of
height difference (Fig. 4-46, H = distance from oil trap bend to
oil trap bend).
▪ An oil trap bend is only required in the gas line.
▪ Install lines with bending unit and an adequate clearance to elec-
trical lines.
▪ Only solder with light nitrogen flow (hard soldering only).
▪ Do not apply thermal insulation to connection points until after
start-up (for purposes of leakage search).
▪ Make flared connections and connect to the devices (observe
tightening torque, see Chap. 10.3).
Set-up and installation
(Fig. 4-46, HO ≥ 10 m).
Installation and maintenance instructions
29