Raypak XTherm 1005A Installation And Operation Manual page 19

MODBUS VERSA
S1 S2
P1
Figure 20. WH Units - Single Water Heater with Tank H Units - Single Boiler with Process Tank
(MASTER)
MODBUS VERSA
PIM
ENABLE
0–10 VDC
S1a
S2a
P1a
A
FACTORY INSTALLED SENSOR
FIELD INSTALLED SENSOR
Figure 21. WH Units - Single Water Heater with Tank H Units - Single Boiler with Process Tank
PIM
CITY
WATER
TANK
HW RETURN
VERSA VERSA
PIM PIM
S1b S2b S1c
P1b
B C
DIRECT DHW/PROCESS CASCADE
A = MASTER
ENABLE
0-10 VDC / 4-20mA
HW SUPPLY
S3
VERSA
PIM
S2c S1d S2d
P1c P1d
D
CONDENSING APPLICATIONS
B – D = FOLLOWER UNITS
FACTORY INSTALLED SENSOR
FIELD INSTALLED SENSOR
CITY
WATER
S3
P2a
19