HEATING CONTROLS
APPLICATION
The ST699 and ST799 are time control programmers that can
be used as replacement programmers on gravity primary or fully
pumped systems. The ST699 has a proven easy to use design
that originates from 1980. The ST799 (shown) was introduced to
offer a flexible 7 day programme.
The front panels of each programmer will fit to the same
backplate. Programming the timing sequence is straightforward,
using the top slider switch and [+] and [-] buttons.
Please note it is recommended that, in order to comply with Part
L1 Building Regulations central heating systems should be
upgraded to fully pumped with a fully independent programmer
e.g. ST9400C.
4.10
ST699/ST799
CLASSIC PROGRAMMERS
FEATURES
■
Compact size
■
Suitable for surface or switch
box mounting
■
Built-in battery back-up
■
One or two ON/OFF periods
per day
■
Double insulated
■
Ease of operation
■
12 hr display with AM/PM indication
■
1 day or 7 day model
OPTIONS
■
The ST799 (shown) can be
Installed as a 5 day/2 day unit
(weekday/weekend)
© Honeywell Control Products and Systems, Issue 10
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