Crown Boiler 24-07 - Manual (Page 81)

81
A6. T
ankless
Application Only with RTC – NO Building Heat; with and without storage tank (ELECTRICAL)
NOTES: 1)
Refer to the I&O to determine correct valve orientation and actuator wiring.
2)
120 V
AC supplying the R
TC may or may not 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)
In COLD ST
ANDBY
applications, set the “OPEN DELA
Y” variable to 30 seconds.
This diagram is for reference only
. The installer or designer is responsible for the proper selection and design of the
system.