14
Wiring to 3 port valve installation
using an external 2 channel
programmer
Type Danfoss FP715
Type Honeywell ST6400C
FIG. 3.4
NOTE: When using a 3 port valve installation in conjunction with an unvented cylinder it will be
necessary to use a 2 port valve on the cylinder flow connection in addition to the 3- port
valve to satisfy Building Regulations.
Wiring to 2 por
t valve installation
using an external 2 channel
pr
ogrammer
Type Danfoss FP715
T
ype Honeywell ST6400C
FIG. 3.3