User Guide

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Sundial RF

Pack 5

Wireless Enabled 2 Zone Programmer and Thermostats (Y9520Z1007)

In a heating system which has no room thermostat, or the

system needs upgrading to 2 heating zones, the existing

wiring can be used to provide Boiler Interlock by ﬁtting

Sundial RF

Pack 5.

The pack contains:

• A wireless enabled 2 zone programmer (ST9520C)

• 2 x wireless room thermostats (DT92E).

Communication between the programmer and

thermostat, as well as features such as Optimum Start*,

Delayed Start** and Optimum Stop***, enable users to

save money and energy.

OPTIONS

FE ATURES

• OpenTherm Boiler Control**** (with suitable OpenTherm Boiler)

• Remote Boiler control with wireless relay box (BDR91 supplied separately)

• Remote Valve control with wireless relay box (BDR91 supplied separately)

• Service interval reminder with variable levels of action

• Installer set-up mode – controls can be matched to the system and user

* Optimum Start: To save energy, let the controls work out when to come on to suit when you want to be warm. Every day, the boiler will start at the latest possible moment

depending on the weather.

** Delayed Start: Once you have programmed your earliest start time, the controls will delay the boiler ﬁring time on warmer days, when it is possible to save energy.

*** Optimum Stop: Saves energy and money by switching off before the normal programme time whenever possible.

**** OpenTherm Boiler Control: OpenTherm provides more precise control on the boiler through the control of the gas valve. It enables the amount of heat provided by the

boiler to be controlled to match the varying demand signal. By reducing the ﬂow temperature to a minimum as it leaves the boiler, the return temperature is kept below the dew

point (55°C) whenever possible, thus enabling the boiler to operate in condensing mode.

• Energy-saving Time Proportional and Integral (TPI) control

• Wireless-enabled upgrade

• Two-way wireless communication

• Wireless signal strength indicator

• Built-in Economy or Comfort programmes on ST9520C

• Line of Text (LoT) display for easy programming on ST9520C

• ST9520C ﬁts on industry standard back plate

• ECO setback function on DT92E

• Frost protection on DT92E

• Table-top stand supplied with DT92E

• Battery-powered DT92E – no wiring

Summary of content (2 pages)

PAGE 1
Sundial RF2 Pack 5 Wireless Enabled 2 Zone Programmer and Thermostats (Y9520Z1007) In a heating system which has no room thermostat, or the The pack contains: system needs upgrading to 2 heating zones, the existing • A wireless enabled 2 zone programmer (ST9520C) wiring can be used to provide Boiler Interlock by fitting Sundial RF2 Pack 5. • 2 x wireless room thermostats (DT92E).
PAGE 2
Installation SPECIFICATION Simply remove the old programmer and replace with Pack 5 ST9520C. This enables the wireless thermostats RF Operation Band ISM (868.0 to 868.