Specifications

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All Onix and brass fi tting surfaces must be clean and •
dry before making connection.
Avoid making connections or splices in inaccessible •
locations.
Repairing Onix having been in service in •
freewatt
PLUS System requires special attention. Any residual
amounts of freewatt PLUS long life coolant inside
Onix tube must be removed. Use an alcohol swab or
pad to remove residue(s), allow tube to dry prior to
connection.
NOTICE
Do not solder near, or overheat, any Onix
connections. Extreme temperatures associated with
soldering may seriously damage Onix and will void
warranty.
8.12 Confi guration of Heating Zones and
Controls
Hydronic • freewatt PLUS System may be applied to
variety of heating loads served by conventional, multi-
zone hydronic heating systems. Including base-board
radiation, radiant fl oor heating, domestic hot water
via indirect storage tank, powered convective heaters,
hydro coils, and others.
Use correct ECR zone control accessory kit, ordered •
separately, for type of zoning to be applied with
hydronic freewatt PLUS System. Kit includes
freewatt smart zone communicating thermostat,
AR822-II pump relay for MCHP hydronic loop pump,
and appropriate zone control relay as follows:
Use Zone Pump Zone Control Accessory Kit which •
includes ARM-6P for pump zoned systems,
Use Zone Valve Zone Control Accessory Kit which •
includes AZ-6CP for valve zoned systems,
Use Hydro-Air Zone Control Accessory Kit which •
includes ARH-3 for distribution systems with air
handlers.
Thermostats for up to six zones, must be wired through •
freewatt PLUS Control Module.
One zone of six zones must designated “Zone 2 - •
Smart Zone”.
Zone 1 is used to accommodate indirect water •
heater having its own dedicated circulation pump.
Required ECR heating zone relay controls for use with •
pumped zoned systems (ARM-6P) and valve zone
systems (AZ-6CP) can accommodate total of 6 zones.
8 - PLACING THE SYSTEM
Expand ECR control using appropriate ECR •
expansion relay controls if additional zones are
needed.
Two air handlers with circulators can be accommodated •
through use ECR ARH-3 control.
One air handler must be “Zone 2 - Smart Zone”. •
If additional zones are needed, expand ECR control •
using appropriate ECR expansion relay controls.
Select “Smart Zone” as zone with largest heating •
demand (but not domestic hot water zone). This
would normally be largest space in heating zone on fi rst
fl oor of two story home.
freewatt PLUS System will
produce best electric power generation benefi t if Smart
Zone represents 25% of total home heating load. If
there is no single large zone in existing distribution
system, but many small zones, consider combining
zones to achieve desired heat load for the Smart Zone.
Installations of Hydronic freewatt PLUS System require
use of AR-822-II for operation of circulator that provides
hydronic water fl ow to HI Module.