16
VAV-SVX01C-EN
UCM 4.2 Installation and Wiring
2. The maximum wire length should not exceed 5,000 feet (1,524 m).
3. Communication link wiring cannot pass between buildings.
4. A maximum of 63 UCMs can be connected to each COM Link. Daisy chaining is a typical
configuration. “STAR” chaining is also acceptable.
Note:
Polarity is extremely important and must be observed on communication link connections.
5. At the VAV box, communication link wires must be connected to TB2-1, 3 (+) and TB2-2, 4 (-)
terminals on the UCM.
6. Verify that the UCM address is properly set (DIP switch SW1). See
Table 6, p. 16
for proper DIP
switch settings.
DIP Switch Settings
DIP Switch SW1 contains six switches for addressing the UCM. These switches allow a user to set
a unique communication address for each UCM. Each UCM on a given communication link must
have a unique address in order for Tracer Summit or the CCP to communicate to it. Refer to
Table 6,
p. 16
for UCM 4.2 DIP switch settings.
Note:
When using Rover™ service tool to communicate to the UCM, you must add 64 to the DIP
switch address. For example, a UCM with the DIP switch address set to 1 would be UCM
Number 65 in Rover.
Figure 2.
Rover screen/application
Table 6.
DIP switch settings for UCM 4.2
UCM Unit #
Address
Dip 1
Dip 2
Dip 3
Dip 4
Dip 5
Dip 6
1
65
OFF
ON
ON
ON
ON
ON
2
66
ON
OFF
ON
ON
ON
ON
3
67
OFF
OFF
ON
ON
ON
ON
4
68
ON
ON
OFF
ON
ON
ON
5
69
OFF
ON
OFF
ON
ON
ON
6
70
ON
OFF
OFF
ON
ON
ON
7
71
OFF
OFF
OFF
ON
ON
ON
8
72
ON
ON
ON
OFF
ON
ON
9
73
OFF
ON
ON
OFF
ON
ON
10
74
ON
OFF
ON
OFF
ON
ON
11
75
OFF
OFF
ON
OFF
ON
ON
12
76
ON
ON
OFF
OFF
ON
ON
Summary of Contents for VAV-UCM 4.2
Page 1: ...May 2010 VAV SVX01C EN Installation Operation Maintenance VAV UCM 4 2...
Page 81: ...VAV SVX01C EN 81 Troubleshooting Figure 46 Single duct with single phase voltage electric heat...
Page 82: ...82 VAV SVX01C EN Troubleshooting Figure 47 Single duct with three phase voltage electric heat...
