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