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PTD
combination or system boilers as well as heat pumps requiring on – o control. The receiver is supplied
with a standard 9-pin back plate for easy retrofit onto legacy Channel Plus or 425 programmers and
time switches, with minimum wiring changes. Supporting Boiler plus compliance with Load
compensation and optimum Start / Stop which significantly improves boiler eciency by preventing
short-cycling and temperature overshooting. The H3747 can also control the schedule of existing wired
thermostats and lets you establish communication between the boiler/heating system and the PTD to
enable the right comfort levels in each of your zones. Ideal for replacing traditional wired controls for
systems that require separate control of heating and hot water or multiple heating zones
The H3747 Smart programmer is designed for use with one to four zones of heating or hot water using
spring return valves. Compatible with most regular heating systems including
Receiver H3747
This is a battery operated wireless device, which measures and controls up to 4 zones (3 heating + 1 hot
water or 4 heating). Designed for comfort and convenience, it comes with an intuitive interface and
powerful features such as Receiver operating mode, Boost, Scheduling, Optimum start/stop and Service
interval etc. There is no need for Wi-Fi when programming schedule in the PTD as it oers easy 7 day
programming. With a guaranteed 12 year battery life, it is an ideal replacement for wired thermostats,
with limited functionality.
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