Raypak Xfiire 300B Installation And Operation Manual page 18

(MASTER)
MODBUS
VERSA
ENABLE
PIM
0-10/4-20mA
S4a
P1a
S1a
S2a
A
FACTORY INSTALLED SENSOR
FIELD INSTALLED SENSOR
Figure 17. Mode 1 - Recommended Heater Cascade with Primary/Secondary Piping
MODBUS
ENABLE
0-10/4-20mA
S4
S1
18
VERSA
PIM
P1b
S1b S1c
S2b
B
VERSA PIM
P1
S2
S3
Figure 18. Mode 1 - Single Heater with Primary/Secondary Piping
VERSA VERSA
PIM PIM
P1c P1d
S1d
S2c
C D
Maximum distance not to exceed
1
4 pipe diameters or 12" (305 mm)
P2
1
1
CONNECT SYSTEM PUMP
IN PARALLEL FROM EACH
CASCADE FOLLOWER
OUTPUT
S2d
S3a
1
FACTORY INSTALLED SENSOR
FIELD INSTALLED SENSOR
Maximum distance not to exceed
4 pipe diameters or 12" (305 mm)
P2a