Heat Pump; Pump For Additional Mixing In The Boiler (Bypass Pump) - flamco MeiTronic W10B Bedienungsanleitung

BASIC DESCRIPTIONS OF
EN
CONTROLLER OPERATION

HEAT PUMP

The heat pump (HP) can operate in two modes depending on the S7.1 parameter
setting:
– S7.1 = 1 – HP always switches on when heating is needed and is always switched on. If
the outdoor temperature drops below the limit outdoor temperature, which is set with
the S7.4 parameter, the heat pump switches off.
- S7.1 = 2 – HP is controlled in accordance to the outdoor temperature and maintains
the calculated temperature in the hot water buffer tank. The highest permissible HP
operating temperature is limited with the setting of the S7.2 parameter. If the outdoor
temperature drops below the limit outdoor temperature, which is set with the S7.4
parameter, the heat pump switches off.
The heat pump is the main, i.e. primary heat source in schemes 419, 420, 422, 422b,
422c and 422d. In the same manner, the heat pump can be added as the primary heat
source in hydraulic schematics 401b, 404b, 404d, 404e, 409, 409b, 410, 410b, 410c,
411, 416, 416b, 416c and 421. The existing controlled heat source, i.e. oil or gas or
electric boiler, becomes an additional or secondary heat source.
By setting the service parameter S4.9=6, the relay output is programmed. In its basic
configuration, the relay output is intended for hot water circulation and heat pump
control.
Settings of the S7.4, 5 and 6 parameters determine the operation of the heat pump
and the controlled or additional heat source, i. e. the liquid fluid or electric boiler.
With the S7.4 parameter, the minimum outdoor temperature for the operation of the
heat pump can be set.
With the S7.5 parameter, the outdoor temperature of the bivalent operation of the heat
pump can be set. Therefore, when the outdoor temperature drops below the set value,
the additional or controlled heat source can be switched on.
However, when the outdoor temperature is lower than the point of monovalent
operation and higher than the point of bivalent operation, the conditional bivalent
operation is switched on. This means that the additional heat source can be switched
on with a delay. The delay time depends on temperature deficit and the settings of the
S7.2 parameter.
The S7.6 parameter allows us to set the outdoor temperature of the monovalent
operation. Therefore, when the outdoor temperature is above the set value, the
additional heat source cannot be switched on.
PUMP FOR ADDITIONAL MIXING IN THE BOILER
(bypass pump)
Circulation pump output (R6 or R7) can be used to control the bypass pump to
increase boiler return temperature. You can set this operation mode by setting the
parameter S1.4=11 (boiler return pipe sensor) and S4.9=4 (bypass pump). Install the T1
sensor in the boiler return-pipe between boiler and mixing valve. If return-pipe
temperature drops below the temperature set by parameter S5.14, the pump is
switched on.
Service setting manual 73