Raypak 1005 - Manual (Page 32)

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 Q: 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 R: 2-10 VDC or 4-20 mA External Input Signal
*Requires a 500Ω resistor.
32
*Maximum 4 times the pipe diameter or 12”, whichever is less.