REMEHA Quinta Pro Installation, User And Service Manual page 37

Fig.30 IF-01 PCB
1
%
2
IF-01
X1
Fig.31 Switch jumper (2)
1
2 %
123157 - v.07 - 10082015
The IF-01 PCB can be built into the instrument box or the housing for the
PCBs. See the instructions provided with the product.
X5
X4
AD-0000054-01
If the boiler locks out, a relay is de-energised and the alarm can be trans­
mitted via a potential-free contact (maximum 230 V, 1 A) on terminals Nc
and C of the connector.
The interface uses OpenTherm to communicate with the boiler control
unit. To make this possible, the OTm connection must be connected to the
OpenTherm input of the boiler control unit.OTm
A choice can be made with this control between control based on temper­
ature or heat output. The two controls are described briefly below.
Tab.19 Temperature-based control (°C)
The 0–10 V signal controls the boiler supply temperature. This control
modulates on the basis of flow temperature. The output varies between
2 2 the minimum and maximum value on the basis of the flow temperature set
point calculated by the controller.
A jumper (2) on the interface is used to select either temperature-based
control ( ) or output-based control (%).
Tab.20 Control based on heat output
AD-0000055-01
The 0–10 V signal controls the boiler output. This control modulates on the
basis of the heat output. The minimum output is linked to the boiler's mod­
ulation depth. The output varies between the minimum and maximum val­
ue on the basis of the value defined by the controller.
Connection options for the 0–10 V PCB (IF-01)
Caution
Do not connect a frost thermostat or room thermostat to the boiler
if using the 0–10 V PCB.
Connecting the status relay (Nc)
Connection (OTm)
Analogue input
1. Connect the input signal to terminals 0–10 of the connector.
Jumper 2 Input signal (V)
0–1.5
1.5–1.8
1.8–10
Jumper 2 Input signal (V)
0–2.0
(1)
% 2.0–2.2
(1)
2.0–10
(1)
(1) Dependent on the minimum modulation depth (set speeds, standard 20%)
Temperature °C Description
0–15 Boiler off
15–18 Hysteresis
18–100 Desired temperature
Heat output (%) Description
0–20 Boiler off
20–22 Hysteresis
20–100 Desired temperature
6 Installation
37