Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
6 Operation
83311002 1/2018-03 La
55-132
6.10 Inputs/outputs
The inputs and outputs can be configured for various functions.
Output MFA1, MFA2 and VA1
Setting parameters
13
,
14
,
15
Description
0
: Forward reporting of operation
The contact closes as soon as heat demand is present.
1
: forward reporting of faults
The contact closes as soon as a fault occurs or when a warning is
triggered for at least 4 minutes.
2
: external feeder pump
The output is activated in the same way as an internal heating circuit
pump (for heating and DHW).
3
: external heating circuit pump without
WCM-FS
The output is activated during heating operation.
4
: DHW pump; three way valve
The output is activated during DHW operation.
5
: DHW circulation pump without WCM-FS
The output is activated during the release of DHW, or time controlled
via button.
6
: DHW circulation pump via WCM-FS
The output is activated subject to the circulation program of the
WCM-FS.
7
: Heating circuit pump via WCM-FS
The output is activated when heating is demanded via WCM-FS #1.
Input H1
Setting parameter
16
Description
0
: Release of heat exchanger in heating oper-
ation
The release is given for heating operation when the input is closed.
The WTC is disabled for heating operations when the input is open.
1
: Heating circuit setback / normal
(1
The normal setpoint is effective when the input is closed. The set-
back value is effective when the input is open.
2
: standby with frost protection
The system is in standby when the input is closed. The operating
modes DHW and heating are disabled. Frost protection is activated.
Systems with external WCM-FS- or WCM-EMheating circuits are
also disabled.
(1
Settings are only effective if no WCM-FSis connected or if it fails.
Input H2
Setting parameter
17
Description
0
: Release of heat exchanger in DHW opera-
tion
The release is given for heating operation when the input is closed.
The WTC is disabled for hot water operation when the input is open.
1
: DHW setback / normal
(1
The normal setpoint is effective when the input is closed. The set-
back value is effective when the input is open.
2
: heating operation with special level
3
: burner lockout function
The appliance switches off when the input is closed. Frost protection
is not activated.
The display shows
W24
, when the contact is closed.
4
: DHW circulation via buttons
Activation of a circulation pump, time can be set via parameter
54
.
Only when
P 13
,
14
,
15
on
5
.
(1
Settings are only effective if no WCM-FSis connected or if it fails.