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Handing over to the operator
When handing over to the operator, instruct in the operation and
operating conditions for the heating system.
▶ Explain operation – especially all safety-related actions.
▶ Point out that conversion or repair may be carried out only by a
licensed contractor.
▶ Also point out the need for visual inspection and preventative
maintenance for safe and environmentally friendly operation.
▶ Hand over the installation and operating instructions to the operator
for safekeeping.
2
Product description
NOTICE: Risk of damage to the floor!
▶ If this product is being used in Radiant Heating
Applications, further floor protection may be
needed. An additional aquastat may be used to
protect the radiant floor from overheating.
• The CZM100 is used to activate circulator pumps or zone valves in
– a maximum of 3 heating zones
• The CZM100 detects the
– supply temperature in a system with hydraulic separation (e. g.
primary/secondary piping or a low loss header)
– BUS signals (from CRC100/CRC200)
• Anti-Seize / Exercising Function:
– The circulator pumps are monitored and operated briefly after
having been idle for 24 hours. This prevents the pump from
seizing up.
– The connected zone valve motor is monitored and operated
briefly after having been idle for 24 hours. This prevents the zone
valve from seizing up.
Regardless of the number of other BUS users at most 3 CZM100 are
permitted in a system having a total of 8 heating zones.
In the delivered condition, the code switch I is set to the 0 position
( Fig. 1).
If the module is used in a system with an indirect fired
storage tank, do not connect the IDHW tank temperature
sensor and tank primary pump to the CZM100. Connect
the DHW tank temperature sensor and tank primary
pump to the boiler.
2.1
Important instructions for use
The module communicates via EMS bus connections.
• Connect the CZM100 only to CRC100/CRC200.
• The range of functions depends on whether a CRC100 or a CRC200
is installed. Detailed information on CRC100/CRC200 can be found
in their installation manuals, application manual or manufacurers
website.
• The installation room must be appropriate for the protection level
stated in the technical data of the CZM100.
• If the CZM100 is used in a system with an indirect fired storage tank,
connect the IDHW tank temperature sensor and tank primary pump
to the boiler.
CZM100
2.2
Setting the code switch of the CZM100
Set up the system only with pumps or only with zone
valves for the heating zones. Pumps and zone valves
cannot be combined.
4 5 6
3
2
1
0
Fig. 1
Code switch and Status indicators for the heating zones on the
CZM100
The module is recognized by the CRC100/CRC200 only
if the code switch is set to a valid position for heating
zones.
Coding and connection to ...
Heating zone
number
CZM100 1 CZM100 2 CZM100 3 Connection at
1
1
2
1
3
1
4
–
5
–
6
–
7
–
8
–
Table 2 Coding and function for max. 3 heating zones without mixers
per module, with pumps
Coding and connection to ...
Heating zone
number
CZM100 1 CZM100 2 CZM100 3 Connection at
1
4
2
4
3
4
4
–
5
–
6
–
7
–
8
–
Table 3 Coding and function for max. 3 heating zones without mixers
per module, with zone valves (external 24 V AC transformer
required)
Each of the CRC100/CRC200 must be set to the corresponding
heating zone number:
For instance: 2 CZM100 are required for a system with 4 heating zones.
The code switches can be set to 1 and 2 on these 2 CZM100. Thus,
heating zones 1, 2, 3 and 4 are active. The 4 CRC200 for the heating
zones must in this case also be coded with 1, 2, 3 and 4.
Product description | 3
1
2
3
4
6 720 810 538-25.1O
–
–
PZ1
–
–
PZ2
–
–
PZ3
2
–
PZ1
2
–
PZ2
2
–
PZ3
–
3
PZ1
–
3
PZ2
–
–
VZ1
–
–
VZ2
–
–
VZ3
5
–
VZ1
5
–
VZ2
5
–
VZ3
–
6
VZ1
–
6
VZ2
6 720 811 731 (2015/01)
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