Weishaupt WTC 45-A, Installation And Operating Instructions Manual

Page: 45 / 90

The simplest control, without additional sensors or
thermostats, controls the flow temperature to the value
set in the end user level (
➩
Ch. 6.2.2). With increased
heat demand the flow temperature should be increased,
with less heat demand it should be reduced accordingly.
Note: If day/night time change-over is required to
comply with local regulation, a digital clock
(WCM-DU) is required for this regulating
variation.
The clock is connected to the following plugs in the
installation area:
•
Supply to clock = plug 2.
• Channel for heating program = plug 3.
• Channel for DHW program = plug 4
(see Ch. 7.5)
☞
Observe installation and operating manual WCM-DU.
Parameter setting (in heating engineer level):
❑
Heating program for setback/normal temperature
➩
P15 = 1.
Heating program for standby/normal temperature
➩
P15 = 0 (boiler cools to min. flow temperature
P30).
❑
Pump on lag
➩
P40 = 0.
❑
Enter Summer/Winter change-over via end user level
(symbol
Ch. 6.2.2)
❑
Domestic hot water program for setback/normal
operation
➩
P17 = 1.
45
7 Control variations Weishaupt Condens Manager (WCM) 7
7.1 Constant flow temperature control
The WCM not only carries out the regulating and control
functions for the boiler, but also the control of the heating
systems and domestic hot water operation.
The heating controller contains basic functions which
have an effect in all the following variations:
• The boiler flow temperature is limited upwards by
the max. flow temperature (
➩ P31) and downwards
by the min. flow temperature ( ➩ P30).
• The WCM is equipped with a burner rapid cycle
interlock, which inhibits frequent burner shutdowns
(
➩ P34, setting --- deactivates this function).
• When switching on the burner, the rating of the WTC
in heating operation is limited for 60 secs to the value
set in parameter A11.
Furthermore, during this time the switch differential
(
➩ P32) is doubled. This leads to longer burner run
times.
The following variations are possible:
C1 On
A u t o
Connection for the clock
Plug Terminal Wire
2 (230V ) L Black
N Blue
PE
free
3 (H1) L Red
E White
4 (H2) L Brown
E Grey
➞
Diagram flow temperature
T
Soll
Day time operation Night time operation
Flow temperature [C°]
Parallel adjustment