Honeywell SUNDIAL Y PLAN Quick Start Manual

SUNDIAL Y PLAN
Y PLAN
FEATURES
I
Independent control of
heating zone
I
Independent control of domestic
hot water temperature
I
Pump & boiler switched off when space
and hot water temperature requirements
are satisfied
I
Both systems can operate at
the same time
OPTIONS
I
Programmable thermostat in
heating zone to provide
'Best Practice' system
I
Radiator thermostats may be fitted
to provide temperature control
in selected rooms/areas
I
CM Zone can provide wireless boiler
interlock for individual radiator control
© Honeywell Control Products and Systems, Issue 10
T6360
ROOM
THERMOSTAT
L641
CYLINDER
THERMOSTAT
APPLICATION
The Sundial Y Plan is designed to provide independent
temperature control of both heating and domestic hot water
circuits in fully pumped central heating installations.
Sundial Y Plan satisfies the minimum standard requirements
of the Building Regulations Part L1 when used in conjunction
with radiator thermostats and an automatic bypass valve.
For systems in dwellings with a floor area greater than 150m
Sundial S Plan Plus must be used (see 2.3).
V4073
3 PORT
MID
POSITION
VALVE
TIMER
2 ,
2.5