Honeywell AQ255 Series Product Data page 13

NOTE: When wiring zone valves with end switches, note
the transformer's VA:
f low voltage zone valves with end switches are
I
used for zone control, make sure the selected
zone valves do not draw more power (VA) than the
38 VA capacity of the AQ10X38 transformer sup-
plied with the AQ2000 Series Control Panel. This
integral transformer has enough power to operate
4 motorized zone valves (such as Honeywell
V8043E valves or 4 valves using low-amperage
draw, heat motor actuators, such as Honeywell
MV100 actuators), plus power the electronics of
the AQ2000 Series Control Module and up to 16
AQ1000 thermostats. If zone valves with high-
amperage draw, heat motor actuators are used
(such as Taco 500 series zone valves), additional
24 Vac transformer capacity will need to be wired
to the Zoning Module to power the valves. See
Fig. 7 on page 13 for recommended wiring of
additional low voltage VA capacity to AQ2000
Series Zoning Modules.
100 VA
TRANSFORMER
115 VAC
1
1
2
3
1
POWER SUPPLY . PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
115 VAC
THERMOSTATS
ZONE 1 ZONE 2 ZONE 3 ZONE 4
24 VAC
USING AN AQ15740B
VALVE ZONING MODULE
Zone 1 Zone 2 Zone 3
1
2
3
1
2
3
1
2
3
Fig. 7. Wiring of additional low voltage VA capacity.
AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS
CAUTION
Equipment Damage Hazard.
Can damage internal circuitry of Zoning Module.
The ES1 and ES2 terminals of the AQ15740B Zoning
Module are powered terminals and must only be
connected to a set of dry contacts, such as a zone
valve motor's end switch. If power is applied to these
contacts (for example, by running line voltage through
the zone valves' end switches to bring on a circulator
feeding those valves), the internal circuitry of the
Zoning Module will be damaged, in which case the
warranty for this product will be voided.
100 VA
1
TRANSFORMER
AQ15540B
Zone 4
24 VAC
1
2
3
13
THERMOSTATS
ZONE 1 ZONE 2 ZONE 3 ZONE 4
USING AN AQ15540B
PUMP ZONING MODULE
Zone 1 Zone 2 Zone 3
Zone 4
1
2
3
1
2
3
1
2
3
M31171
69-1981—06