85
Checking the diaphragm expansion vessel and system pressure
B
A
Fig. 80
Note
Carry out this test on a cold system.
The system must be shut down.
1.
Drain the heating water buffer cylinder until pres-
sure gauge
A
shows "0".
2.
Check the pre-charge pressure of the diaphragm
expansion vessel. Set value: 0.9 bar (0.09 MPa).
3.
If the charge pressure of the diaphragm expansion
vessel is lower than this, recharge with nitrogen via
connection
B
.
4.
Top up with water. Observe the specifications for fill
and top-up water; see page 55.
Operating pressure: 1.0 bar (0.1 MPa).
Commissioning, inspection, maintenance
2-yearly maintenance of fuel cell module
(cont.)
5775 636 GB
Summary of Contents for C3TB
Page 136: ...136 Troubleshooting Repairs gas condensing module cont 5775 636 GB Diagnosis ...
Page 143: ...143 Parts lists Heat cell assembly 5775 636 GB Components ...
Page 160: ...160 Parts not shown 0009 PCB IU100 B30 Parts lists Fuel cell assembly 5775 636 GB Components ...
Page 161: ...161 Parts lists Fuel cell assembly cont 5775 636 GB Components ...
Page 187: ...187 5775 636 GB ...