Daikin Altherma 3 R F EHVZ04S18E 6V Series - Page 147

10 | Configuration
Installer reference guide
147
ERGA04~08EAV3(A) + EHVZ04+08S18+23EA6V+9W
Daikin Altherma 3 R F
4P629093-1 – 2020.08
INFORMATION
When leaving water temperature modulation is enabled, the weather‑dependent
curve needs to be set to a higher position than [8-06] plus the minimum leaving
water temperature setpoint required to reach a stable condition on the comfort
setpoint for the room. To increase efficiency, modulation can lower the leaving water
setpoint. By setting the weather‑dependent curve to a higher position, it cannot drop
below the minimum setpoint. See the illustration below.
a
+[8-06]
−[8-06]
b
T
a
T
t
a Weather-dependent curve
b Minimum leaving water temperature setpoint required to reach a stable condition
on the comfort setpoint for the room.
Shut off valve
The following is only applicable in case of 2 leaving water temperature zones. In
case of 1 leaving water temperature zone, connect the shut-off valve to the
heating/cooling output.
The shut off valve for the main leaving water temperature zone can close under
these circumstances:
INFORMATION
During defrost operation, the shut-off valve is ALWAYS opened.
During thermo: If [F‑0B] is enabled, the shut off valve closes when there is no
heating demand from the main zone. Enable this setting to:
▪ avoid leaving water supply to the heat emitters in the main LWT zone (through
the mixing valve station) when there is request from the additional LWT zone.
▪ activate the ON/OFF pump of the mixing valve station ONLY when there is
demand.
# Code Description
[2.D.1] [F-0B] The shut off valve:
▪ 0 No: is NOT influenced by heating demand.
▪ 1 Yes: closes when there is NO heating
demand.
INFORMATION
The setting [F‑0B] is only valid when there is a thermostat or external room
thermostat request setting (NOT in case of leaving water temperature setting).
WD curve type
The weather dependent curve can be defined using the 2-points method or the
Slope-Offset method.
See "10.4.22-points curve"[4130] and "10.4.3Slope-offset curve"[4131].