Crown Boiler 24-07 - Manual (Page 79)

79
A5. 3-way Multiple Boiler RTC in Primary/Secondary – Heating and DHW using Indirect W
ater Heater on Primary Loop;
Using Sequencer 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)
System Pump (P3) 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
system.