Installation Instructions

Honeywell Y plan 1 three-port mid-
position valve
The operation is identical to the S plan but it uses
a single three-port or mid position valve.
If a system has been
set up and the relays
are moved to a new
function, the relay
binding must be cleared
or it will continue to
carry out its original
function.
!
Pump
DWH Heating
Radiators
DWH Cylinder
BOILER
Junction
Box
BDR91 BDR91
CS92A
V4073
evohome
Central Controller
Pump
DWH
Radiators
DWH Cylinder
BOILER
Junction
Box
BDR91
CS92A
V4073
evohome
Central Controller
HR92
Figure 3 Honeywell Y plan
Figure 4 Stored hot
water and zoned heating
system. This system needs
HR92s or other zoning
solutions for the radiators.
43evohome Installation Guide