Honeywell AQ250 Series Quick Installation Manual page 6

AQ250 SERIES HYDRONIC CONTROL PANELS
voltage thermostat wiring from the R and C terminals on the
Zoning Module to the R and C terminals on the Expansion
Zoning Panel.
Fig. 8 Connecting AQ1000 Thermostats
Step 4 Zoning Equipment - Line Voltage Pumps Or Low
Voltage Zone Valves.
Since the Zoning Module of the AQ2504B2 Control
Panel can be used with either low voltage zone valves
(without end switches) or line voltage pumps or valves,
FIELD installed wiring of the correct voltage needs to
be connected to the zoning equipment terminals on
the bottom left portion of the Zoning Module.
FROM LINE VOLTAGE
120V TERMINALS
(N AND L) ON BOTTOM
OF TRANSFORMER
Fig. 9a Wiring an AQ1554P2 Zoning Module for
use with line voltage circulators.
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FROM LOW VOLTAGE
24 VAC TERMINALS
(C AND R) ON TOP
OF TRANSFORMER
Fig. 9b. Wiring an AQ1554P2 Zoning Module for use
with low voltage Zone Valves WITHOUT end switches.
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Fig. 9c Wiring an AQ1574V4 Zoning Module for use
with low voltage Zone Valves WITH end switches.
CAUTION
The ES1 and ES2 terminals of the AQ1574V4
Zoning Module are powered terminals and must
ONLY be connected to a set of dry contacts. 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.
a. For line voltage circulators (Figure 9a), remove
the plastic wiring barrier (factory-installed) that's
located in the bottom wiring channel between the
AQ1500 Control Module and the Zoning Module.
Run jumper wires from the N and L terminals on the
bottom of the Control Panel's transformer through
the wiring channel across the bottom of the Control
Panel to the corresponding N and L terminals of the
Zoning Module.
NOTE: If low voltage zone valves are used with the
AQ2504B2 Control Panel, the "low voltage out-
put" sticker supplied (shown in Figure 10)
MUST be applied over the "line voltage output"
sticker that is already attached to the Zoning
Module.
Fig. 10 Low Voltage Output Sticker
b. For low voltage zone valves without end
switches (Figure 9b), run jumper wires from the R
and C terminals on the top left of the Control Panel's
transformer through the wiring channel across the
top of the Control Panel, down through the wiring
channel on the right side of the panel and over to
the R and C terminals on the bottom of the Zoning
Module.
c. For low voltage zone valves with end switches
(Figure 9c), 24 Vac power is pre-wired between the
transformer secondary at the top left of the AQ250's
transformer and the AQ1574V4 Zoning Module, so
no field wiring is required.
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