Valve Fuse Protection
The Hydronic Zone Valve panels come equipped with
automatically resettable fuses on each valve output. This
fuse will trip when a load of 3.7 Amps or higher is applied.
Should one of the valves in a system fail shorted, the
panel's Power Transformer Fuse will be protected and all
other zones in the system will remain operational.
It is recommended that power be removed from the
Hydronic Zone Valve Panel, before replacing a faulty zone
valve. This will accelerate the time required for the fuse to
automatically reset and return fully to its initial state.
The following steps can be used to detect if a valve fault
• Open panel cover
• Slide Priority Switch position to OFF
• Jumper terminals 3 and 4 on the suspect zone valve
• Give zone thermostat a call for heat
• If the thermostat LED is ON and Valve LED is OFF, the
panel's fuse has tripped (valve fault – short).
• Slide the Priority Switch position back to its initial
NOTE: Before replacing a faulty valve, remember to
remove power from the zone panel.
6-ZONE VALVE CONTROLLER
Fig. 17. Mylar cover.
This panel provides a status indicator label which is
available both when the panel cover is in place and
removed. Descriptions of the indicator LED's are shown
indicate the thermostat associated with
that specific zone is calling for heat, with the exception of
when a priority zone call is active and the 60 minute
"Priority-Timer" has not expired. During this time, LED's on
Zone 2-6 will be turned off.
energized and the end switch is closed or jumpered.
calling. When DHW zone is active all other zone LED's will
indicates the transformer is powered.
Boiler and End Switch LED's indicate when each burner
relay is energized and calling for heat.
Valve Open DHW Priority
This device complies with part 15 of the FCC rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
indicate when a valve has been
indicates the priority zone is active and
Table 2. Color Chart.
Boiler & End