Crown Boiler 24-07 - Manual (Page 73)

73
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)
The Outdoor Sensor (S3) and the Mix Supply Sensor (S2) are required if the Outdoor Reset feature is selected.
5)
Use isolation relays for circulators greater than 1/3 HP
. Use motor starters for 3 phase circulators.
6)
Connect the
Tankless
Aquastat (A1) if you are not using a storage tank. If you are using a storage tank with the tankless heater than using the
storage tank aquastat (A1). 7)
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.
A2. 3-way RTC in Primary/Secondary – Heating and DHW using T
ankless Coils; with/without Outdoor Reset (ELECTRICAL)