Centrometal PelTec Series Technical Instructions page 36

Temperatures (CRO/BUF; --/BUF)
NOTE: USED ONLY IN CASCADES AND EXTERNAL CONTROL
Scheme 11. Configuration CRO / BUF (12-48); -- / BUF (69/96)
Version 1: Display shows 1 temperature (hidraulic crossover)
NOT POSSIBLE AT 69/96 kW
10
1
5
1 - Boiler PelTec / PelTec-lambda
2 - Air self-venting group 2,5 bar
3 - Motor 4-ways mixing valve
4 - Closed type expansion vessel
5 - Return flow sensor
Possible control:
- manually (ON/OFF)
- by scheduled starting times
- by external controller(START/STOP)**
- by cascade manager *
- by external controller (start/stop) + cascade manager**
NOTES:
- in this configuration PelTec-lambda 69/96 boiler works only with CM2K module which must be installed and
configurated
- in this configuration at PelTec-lambda 69/96 boiler shown is only Accumulation tank i.e. 2 sensors
(at selection -/BUF)
- In this configuration is possible to upgrade up to 4 unit "CM2K module for regulation 2 heating circuits".
- In this configuration is possible to connect external control (external start)
* Note: Connecting the sensor 9 (version 1) and 7,8 (version 2) is not required because these temperatures are only
informative, if sensors are not connected, regulation will show temperature " - °C". The boiler regulation will not report
any error even if the sensors are defective.
On the screen
When ''1 Temperature'' is selected, screen shows hydraulic crossover with 1 temperature (not
possible at 69/96).
When ''2 Temperatures'' is selected, screen shows accumulation tank with 2 temperatures.
This option can be changed only by authorized serviceman.
36
2
bar
M
6a
4
3
P1
only 12-48
Version 2: Display shows 2 temperatures (accumulation tank)
9
1
6a - Hydraulic crossover / 6b - Accumulation tank
7 - Accumulation tank sensor 1 (upper)
8 - Accumulation tank sensor 2 (lower)
9 - Hydraulic crossover sensor
10 - Outdoor sensor
Required sensors: - return flow temp. sensor
- hydraulic crossover sensor (only in version 1)
- accumulation tank sensor (upper) (only in version 2)
- accumulation tank sensor (lower) (only in version 2)
Imposible control:
- by room thermostat
Technical instructions REGULATION PelTec / PelTec-lambda
10
bar
2
M
3
4
5
P1
**
6b
7
8
Additional equipment
12-96