MODULATING
*
Fig. 34: Mode 7 Primary/Secondary Piping with
External Target Temp
0-10 VDC
0-20 mA*
Boiler Target
0
0
--- (OFF)
1
2
50°F
2
4
68.9°F
3
6
87.8°F
4
8
106.7°F
5
10
125.6°F
6
12
144.1°F
7
14
163.3°F
8
16
182.2°F
9
18
201.1°F
10
20
220°F
Table P: 0-10 VDC or 0-20 mA External Input Signal
*Requires a 500Ω resistor.
2-10 VDC
4-20 mA*
Boiler Target
0
0
--- (OFF)
1
2
--- (OFF)
2
4
50°F
3
6
71.3°F
4
8
92.5°F
5
10
113.8°F
6
12
135°F
7
14
156.3°F
8
16
177.5°F
9
18
198.8°F
10
20
220°F
Table Q: 2-10 VDC or 4-20 mA External Input Signal
*Requires a 500Ω resistor.
*Maximum 4 times the pipe diameter or 12”, whichever is less.
California Hot Water Supply, Inc.
(800) 249-7244
32
