Domestic Hot Water Configurations

The DHWS equipment is configurable for different systems by using the parameter CFG-01 , as shown in the next table and figures.

Table 1.   Domestic Hot Water Configurations

Configuration Parameter

DHWS Equipment Configuration

CFG-01

Control

Valve

Primary Pump

Sensors

1

continuous

3-way

yes

mandatory

upper sensor

optional

lower sensor,

system supply sensor

2

on-off

3-way*

3

2-way* and no valve

*in configurations 2 and 3 the valve switches between 0 and 100%. You can connect a digital output and ignore the warning.


Configuration Schematics

CFG-01 = 1

CFG-01 = 2

CFG-01 = 3

The primary pump starts when the internal controller requests to warm up the buffer. As soon as the system flow temperature is high enough, the valve will start to control. A system supply pump is necessary to start the primary supply temperature circulation.

The primary pump starts when the internal controller requests to warm up the buffer. This pre-circulation allows the rising of the system flow temperature. As soon as the system flow temperature is high enough, the bypass valve will open.

The valve opens when the internal controllers is requested to warm up the buffer and the system flow temperature is high enough to prevent forced cooling down of the buffer. The pump will start only after the valve is open.

Fig. 1.   Domestic Hot Water Configurations