Service setting manual
56
ENG
D. h. w. warming is switched off unconditionally, if the d. h. w. temperature exceeds the
maximum temperature - parameter S4.5, or if solar collectors temperature exceeds the pro-
tection temperature - parameter S6.3.
When d. h. w. is warmed with solar collectors, you can set the liquid fuel operation mode with
parameter S6.6, namely:
S6.6= -1, which enables simultaneous operation of both heat sources.
S6.6= 0 ÷ 600, the boiler will be switches on with set delay upon deactivation of the solar
system. The set value represents delay time in minutes.
D. h. w. warming with an electric heating body instead of boiler
You can program the output for the pump for d. h. w. warming from the boiler (R5) to control
the electric heater for d. h. w. warming by setting the parameter S4.1=2.
D. h. w. will be warmed up to the set desired temperature according to the time program for
d. h. w. warming.
D. h. w. warming with an electric heating body and boiler
You can program the output for the circulation pump (R6, R7 or R8) to control the electric
heater for d. h. w. warming by setting the parameter S4.9=2 .
D. h. w. will be warmed up to the set desired temperature according to the time program for
d. h. w. warming.
To control the electric heating body, a power relay and a thermal fuse must be
connected.
Priority of d. h. w. warming over room heating
With parameters P4.2 and P4.3 you can set the priority of d. h. w. warming over room heat-
ing.
Return cooling of domestic hot water (Recooling)
With parameter S4.4 you can activate return cooling of domestic hot water, if d. h. w. tem-
perature approaches it maximum temperature. Parameter S4.4 enables you to select in what
manner the d. h. w. will be cooled.
Solar collector pump - impulsive mode
Impulsive mode of sun collector pump is set with parameter S6.8=1. If collector temperature
is higher as minimum collector temperature, the pump is activated each 15 minutes for 10
seconds. This way a realistic collector temperature is acquired. This setting is used in case if
collector sensor isn't mounted directly into the collector body.
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