Additional Accessories (System Dependent); Cleaning; Mounting; Installation - Bosch Thermotechnik EMS 2 Manual De Instalación

14 | Mounting

Specifications
Maximum output per connection
• PC0, PC1
• A0, A1
Capturing range for the flow and
return temperature sensor
• Lower fault limit
• Display range
• Upper fault limit
Capturing range, outside
temperature sensor
• Lower fault limit
• Display range
• Upper fault limit
Permitted ambient temp.
IP rating
Protection class
ID no.
Table 3
2.6

Additional accessories (system dependent)

• User interface: weather compensated controller with outside
temperature sensor or room temperature-dependent controller;
connection to BUS (do not connect to BUS1, BUS2, BUS3 or BUS4);
connect outside temperature sensor to T1
• Flow temperature sensor; connect to T0 (part number 5991376)
• Outside temperature sensor; connect to T1
• Return temperature sensor; connect to T2
• Cascade pump; connect to PC0
• Heating pump; connection to PC1
• Switch for max. performance; connect to I2
• Stop switch; connect to I3
Installation of additional accessories
▶ Install the additional accessories in accordance with legal
requirements and the instructions supplied.
2.7

Cleaning

▶ If required, wipe the enclosure with a damp cloth. Never use
aggressive or acidic cleaning agents for this.
3 Mounting
DANGER: Risk of electric shock!
▶ Before installing this product: completely disconnect
heat appliances and all other BUS nodes from the mains
voltage.
▶ Before commissioning: fit the cover ( Fig. 21,
page 85).
3.1

Installation

▶ Install the module on a wall, ( Fig. 6 to Fig. 8, starting at page 82),
on a mounting rail ( Fig. 9, page 82) or in an assembly.
▶ When removing the module from the mounting rail, refer to Fig. 10 on
page 83.
6 720 809 453 (2014/12)
• 400 W (high-efficiency pumps
permissible; max. 40 A/s)
• 10 W
• < – 10 °C
• 0 ... 100 °C
• > 125 °C
• < – 35 °C
• – 30 ... 50 °C
• > 125 °C
0 ... 60 °C
IP44
I
Data plate ( Fig. 22, page 85)
3.2

Electrical connection

▶ Observe current regulations applicable to power connections, and
use at least cable type H05 VV-...
3.2.1 Connecting the BUS connection and temperature sensor
(extra-low voltage side)
General BUS connection
If the maximum cable length of the BUS connection
between all BUS nodes is exceeded, or if the BUS system
is realised as a ring structure, the system cannot be
commissioned.
Maximum total length of BUS connections:
2
• 100 m at 0.50 mm conductor cross-section
2
• 300 m at 1.50 mm conductor cross-section
BUS connection between the heat source and cascade module
▶ Connect the heat sources and lower-level cascade modules directly
to terminals BUS1 – BUS4 ( overview of the terminal
assignment).
BUS connection between the cascade module – user interface –
other modules
▶ If the conductor cross-sections are different, use the junction box to
connect the BUS nodes.
▶ BUS user [B] via junction box [A] in a star ( Fig. 19, page 84, note
the instructions for the user interface and other modules).
Temperature sensor
When sensor leads are extended, apply the following lead cross-
sections:
2
• Up to 20 m with 0.75 mm to 1.50 mm
• 20 m up to 100 m with 1.50 mm
General information regarding extra-low voltage connections
Terminal designations (extra-low voltage side  24 V)
1)
0-10 V Connection for 0-10 V room temperature-dependent controller
or building management system with a 0-10 V controller output
- or -
performance feedback as a 0-10 V signal for a building
management system
2)
BUS Connection to controller, modules
BUS1 – 4 Connection to heat sources or lower-level cascade modules
I2, I3 Connection to external switch (Input)
3)
OC1 Connection Pump speed control with pulse width modulation or
0-10 V signal (Output Cascade)
T0, T1, T2 Temperature sensor connection (Temperature sensor)
Table 4
1) Terminal assignment: 1 – ground; 2 – 0-10 V input for heat requirement from
the building management system; 3 – 0-10 V output (optional) for feedback
2) In a few devices, the terminal for the BUS system is labelled with EMS.
3) Terminal assignment: 1 - earth; 2 - pulse width modulation output; 3 - pulse
width modulation input (optional)
▶ All low voltage leads must be routed separately from cables carrying
mains voltage to avoid inductive interference (minimum separation
100 mm).
▶ In the case of external inductive interferences (e.g. from PV
systems), use shielded cables (e.g. LIYCY) and earth the shield on
one side. The shield should be connected to the building's earth lead,
e.g. to a free earth conductor terminal or water pipe, and not to the
earth lead in the module.
▶ Route cables through the grommets provided and connect them as
shown in the connection diagrams.
2
conductor cross-section
2
conductor cross-section
MC 400