new switching relays replace
virtually all of the failed
hydronic relays you encounter in
a day’s work.
These UNIVERSAL single-zone switching relays
will restore intermediate line- and
low-voltage switching in almost all oil-fired
hydronic heating systems
you’re likely to meet.
Three knock-outs at the bottom and one at
the top give you
plenty of mounting and
wiring options. Large, easy-to-drive screws
and the same familiar layout of
Honeywell’s classic hydronic relays, keep
installation time to
Plug-in replaceable relays, a replaceable
transformer fuse and
that familiar Honeywell
layout combine to cut down on service time.
Two troubleshooting LEDs and a push-to- test
button make troubleshooting as quick
as can be. The HEAT
CALL LED lights
upon a call
for heat or when the TEST button is
pressed, and the RELAY
when 120 Vac
is present at the N.O. terminal.
Compact DC relay technology means that coils
run cooler and more efficiently. And
rated contacts run
at a lower
current to eliminate possible blocked
signals due to normal contact resistance.
That means fewer
problems to troubleshoot,
plus longer system life for your customers.
These single-zone relays can easily be
multizone applications. And
when powered from a 24 Vac external source,
they can provide electrical isolation in
For higher-current or spot switching applications,
the RA889A single-zone hydronic
switching relay replaces any single-zone
switching relays not replaceable by
the lower-current R8845U model.
Large screws, plug-in relays, LED lights, and
make these the friendliest single-zone
on your truck. R8845U shown; use RA889A
relay for higher-current applications.
SPST 7.4AFL, plus Powerpile®
-rated low voltage
Honeywell,White-Rodgers, Argo,Erie, Taco
Honeywell electronic and electro-mechanical
2-and 3-wire thermostats
1A automotive fuse
15AFL plus Powerpile®
Honeywell and competitor’s