Rendamax R3456 EVO, Руководство пользователя, Страница: 32 / 72

31
Controls
Basic controls and connections
Control by building management system
Boiler enable signal
Temperature or capacity setpoint
Basic controls and connections
The standard version of the R3456
EVO is equipped with a LMS14 boiler
management unit. This controller
controls both the burner safety
operation and the temperature
regulation of the boiler. The LMS14
includes the following functions:

Weather compensation (with optional
outdoor sensor)

Connection possibility for external
gas valve and/or room fan. See
chapter "Accessories"

Master/Slave cascade control (with
optional BUS communication
modules).See chapter "Accessories"
When additional control of secundary
heating zones or cascade systems are
required, the R3456 EVO can be
extended with different additional
controls. Explanation of these controls
can be found in the next sections.

Electronic high limit thermostat

Electronic flue gas temperature limiter

Primary boiler pump control

Primary sanitary hot water pump
control
(accessory necessary)

Interlock input

Lockout input

Alarm output signal

Boiler enable signal

0-10VDC temperature or capacity
setpoint (programmable)

0-10VDC capacity feedback

Temperature control central heating
via PID controller

Temperature control sanitary hot
water (hot water priority)
Control by building management
system
The R3456 EVO can be connected to a
building management system. This can
be done by using (one of) the following
connections:
Boiler enable signal, terminals
116-117 (volt free)
The boiler enable signal is provided
with a jumper from the factory. When
connecting a (volt free!!!) external
signal, the jumper must be removed.
Temperature or capacity setpoint,
terminals 112-113 (0-10VDC)
The R3456 EVO can be controlled via
a temperature or capacity setpoint.
The signal values are programmable,
from the factory the contact is
programmed for temperature setpoint
with settings as shown in the graphic.
When controlling the boiler via a
capacity setpoint, it’s highly
recommended to control the primary
boiler pump with the internal pump
control of the LMS14 boiler controller.
The minimum flow rate through the
boiler must be respected at all times.
Attention : from 0,15V the burner will
work on minimum load.
0
20
40
60
80
100
0 2 4 6 8 10
[%]
[VDC ]
0-10VDC Capacity
0
20
40
60
80
100
0 2 4 6 8 10
[ C]
[VDC]
0-10VDC Temp