23
Changing the control’s peak sen-
9.7
sor
1
2
4
3
5
6
7
Sensors in the heat pump and MBH/DWH.
Figure 10.
Image description
Heat pump
1
Existing hot water sensor in heat pump
2
Connection 325,326 for peak sensor
3
Disconnected peak sensor in heat pump
4
Peak sensor in MBH/DWH
5
Hot water sensor in MBH/DWH not used
6
MBH/DWH
7
When the heat pump produces hot water, control must use the
peak sensor in MBH/DWH instead of the heat pump’s peak sensor�
Reconnect as follows:
On the heat pump's I/O card, disconnect the connector for the
1�
heat pump’s peak sensor at connection 325,326�
Pull the MBH/DWH peak sensor cable through the cable grommet
2�
in the top panel�
Pull the cable in to the heat pump through the cable grommet in
3�
the top panel�
Connect the MBH/DWH peak sensor connector to the I/O card’s
4�
connection 325,326�
Coil any excess cabling and secure the cable using a cable tie�
5�
Bleeding coils in the heaters
9.8
C
B
KV
VV
A
D
3
1
2
4
Bleeding
Figure 11.
Image description
Heat pump
1
MBH/DWH
2
Plugged flexible hose
3
Hose to bucket at outlet
4
Fill and bleed the entire heating system with circulation pump shut off�
Then vent MBH/DWH as follows:
Detach the flexible hose at the 3-way clamp ring connector with
1�
bleed screw (B) on MBH/DWH and plug the loose hose end�
Connect an air hose in the 3-way clamp ring connector bleed
2�
screw (B) on MBH/DWH and route it down to a bucket, preferably
one that can overflow into a floor drain or similar�
Ensure that HGW shunt in the heat pump is closed�
3�
Menu SERVICE -> MANUAL TEST -> HGW-SHUNT, set the value to
+�
Open the filler for the heating system and allow water to flow
4�
through the coil in MBH/DWH�
Let the flow run through the loop until there are no air bubbles in
5�
the bucket that the air hose is lying in� The pipe system to be bled
is long so allow the water to run for a long time when bleeding�
Close the filler and reinstall the flexible hose on the 3-way clamp
6�
ring connector with bleed screw (B) on MBH/DWH�
Bleed the system at all bleed screws on the hose connections on
7�
the heat pump and MBH/DWH�
Reinstall the fronts�
8�
Содержание VMBQO23H
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