Y Plan: Three-Port Mid Position Valve With A Wired Boiler - Honeywell evohome Installation Manual

Figure 10 Mid position
(3 port) valve
G/Yellow: Earth wire
BLUE: Motor Neutral
WHITE: Heating relay
GREY: Hot water relay
ORANGE: End switch (If
used). In wired system
this typically feeds the
boiler. When a wireless
boiler relay is fitted the end
switch is not required.
230V
50Hz
3A RATED
L N E
evohome Installation Guide
Y Plan: Three-port Mid position
valve with a wired boiler
If a wireless boiler relay is used the Orange wire
and feed to pump and boiler are not required.
HTG
RECEIVER
BDR91
L
N A B
1 2 3 4
DHW
RECEIVER
C
BDR91
L
N A B
5 6 7 8
N E L
PUMP
V4073A
MID POSITION
ZONE VALVE
9 10
L
E
N
BOILER
47