Assembly and installation
18
2
2.4.3
Dimensions and jig for installation holes
Figure 2.11
Description of mounting holes for room unit QAA74.611
26.4
33
48
48
45.1
28
28
33 35
5
23
72
72
2
58
134
144
10
10
7.6
22
78.0
12.7
58.8
86
48
96
2.4.4
Electrical hookup
Figure 2.12
Room unit QAA74.611 connections
Table 2.7
Room unit QAA74.611 connections
Terminal
Name
Description
3
BSB
Data bus BSB +
2
M
Data bus BSB -
1
G+
Power 12 V DC
2.5
OVLV007 DIVERTER VALVE
(OPTIONAL)
Figure 2.13
OVLV007 diverter valve dimensions
D
C
94
136
8
6
4
9
8
6
4
9
0
9
0
9
A
B
AB
Consider the following for the hydraulic connection:
▶
AB = common
▶
A = DHW circuit
▶
B = space heating circuit
