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EXTRAS
ZONE CONTROLS
(CAUTION) Do not install a bypass duct.
The only zone control that is factory authorized is the EWC UZC series of zone control. The zone control will be wired and set up
according to (Fig. 12, Appendix F). This zone control works very well with the Acadia as long as the following rules are followed:
1. Do not install a bypass duct. The Acadia uses Boosted Compression Technology; the return air cannot . This
means when the Booster Compressor is on, the indoor air handler is receiving a call for the high speed fan and the system is
maxing out the capacity of the coil. Recycling heat to the return duct, through a bypass, increases head pressures up to unsafe
levels within the system.
2. Use minimum position dampers on bigger zones allowing a percentage of blow-by of airflow into that zone.
3. Use a dump zone if any zone cannot be sized to handle the high speed fan of the indoor air handler and minimum position
dampers are not available.
4. On new construction or new duct installation, try to size the zone ducting to handle 70% of high air flow. This will eliminate the
need for minimum position dampers or a dump zone.
5. Use as few zones as you can to get the job done. This will make the install much easier and may eliminate the need for a dump
zone.
6. Use the Hallowell thermostat on all the zones. This keeps the wiring uniform and reduces the chance of getting a zone
accidentally miss-wired.
HYDRONIC COIL FOR SUPPLEMENTAL HEAT
(CAUTION) A Hydronic Coil is to be placed in the supply duct ONLY. DO NOT install a hydronic coil in the return duct or internal
to the indoor air handler.
Some installation applications may require a hydronic coil in the duct work instead of the electric heaters. This is approved as long
as the following conditions are met:
1. Follow all plumbing codes and regulations when adding a hydronic coil to a system.
2. The coil must be placed in the supply air flow from the indoor air handler. The Acadia uses Boosted Compression Technology;
the return air cannot be
3. The coil should be sized so that it will not hinder static pressure drop across the coil.
4. The coil should be sized so that it can perform full back up if the heat pump is inoperable.
5. Be sure ductwork connected to the coil is properly sealed and insulated.
6. Use anti-freeze in the hydronic loop to prevent freezing of the hydronic coil. A freeze-stat can also be used to protect the
hydronic coil.
7. Hydronic coils added internally to the Hallowell matched air handler are not approved.
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