Crown Boiler 24-07 - Manual (Page 71)

71
A1. 3-way RTC in Primary/Secondary – Heating Only/No DHW
; with/without Outdoor Reset (ELECTRICAL)
NOTES: 1)
Refer to the I&O to determine correct valve orientation and actuator wiring.
2)
120 V
AC supplying the R
TC should be separate from the burner/boiler circuit.
3)
Heat demand can be any electrical signal consisting of 24 – 240 V
AC.
4)
Use isolation relays for circulators greater than 1/3 HP
. Use motor starters for 3 phase circulators.
5)
The Outdoor Sensor (S3) and the Mix Supply Sensor (S2) are required if the Outdoor Reset feature is selected.
6)
System Pump (P2) to be operated by zone relay or other installer supplied device.
This diagram is for reference only
. The installer or designer is responsible for the proper selection and design of the sys
-
tem.