Strebel S-ASX 30, Руководство по установке, эксплуатации и техническому обслуживанию

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20.2.5 M
AX
S
OURCE
F
ORCE
C
HARGE
OT (3517)
Defines the attenuated outside temperature at which the maximum number of generators are released. During forced
charging, at least one generator is always released. Additional generators are released in a linear manner, depending
on the temperature differential of 15 °C, "Max source force charge OT", and the attenuated outside temperature.
20.2.6
N
UMBER
S
OURCE
D
EFROST
A
LLOWED
(3518)
It must be prevented that all heat pumps involved in a cascade defrost at the same time. For this reason, the controller
only allows a certain proportion of generators ("Numb source defrost allowed") to start defrosting simultaneously
– and
thus only the respective proportion of heat pumps.
i) For that purpose, the heat pumps send defrost requests to the controller and the controller sends defrost
delays to the heat pumps.
ii) The order of the defrost requests received is taken into consideration.
iii) "Numb source defrost allowed" includes all generators, therefore non-heat pumps as well.
20.2.7
R
ELEASE
I
NTEGRAL
S
OURCE
S
EQUENCE
(3530)
If the cascade flow temperature (B10) drops below its setpoint by the adjustable neutral zone, the release integral is
calculated. If the heat produced drops below the demand by the "Release integral source seq" set here, another
generator is switched on.
i) When the value is increased, additional generators are switched on at a slower rate.
ii) When the value is decreased, additional generators are switched on at a faster rate.
20.2.8
R
ESET
I
NTEGRAL
S
OURCE
S
EQUENCE
(3531)
If the cascade flow temperature (B10) exceeds its setpoint by the adjustable neutral zone (for explanation see below),
the reset integral is calculated. If the demand for heat exceeds the "Reset integral source seq" set here, the generator
with the lowest priority is switched off.
i) When the value is increased, the generators operate for longer periods of time (in the case of surplus
heat).
ii) When the value is decreased, the generators are switched off at a faster rate.
20.2.9
N
EUTRAL
Z
ONE
H
EATING
C
ASCADE
(ACS)
The neutral zone can be adjusted. It is also dependent on the number of generators released. The larger the number
of generator stages released, the smaller the neutral zone becomes. The neutral zone is limited to a minimum of 1
Kelvin.
Neutral zone = "Neutral zone heating cascade" (ACS) minus (stage sequence state/4)
20.2.10
S
WITCH ON
D
ELAY
(3533)
For a heat generator to switch on, "Switch on delay" must at least have elapsed.
The locking time ensures that the lag generator is allowed enough time to switch on. This prevents too frequent
cycling of the generators. When a DHW request is made, the locking time is a maximum of 1 minute.