Enertech Global
65
EAV - EME/EMD Rev. A Models
Installation and Operations Manual
Space Conditioning Controls
The EME/EMD indoor module has been developed to easily
interface with zone control modules that can be used with zone
valves. Hydro-Connect is a good fit when there is one fan coil/
air handler, along with some radiant floor heating zones. If
there are only fan coils (no radiant), Enertech recommends the
EWC UZ4 zone panel. Both zone controls support most 24 VAC
thermostats. Review the selection chart on the next page for the
best match for your application.
Zone valves are recommended to have a CV of at least 8.9 and
have 24VAC actuators. These valves can be powered through
the zone controller via the “R” and “C” terminals on the AV field
terminal strip, as long as the demand at any time is less than
50VA (approximately 5 valves opening at once). If the load will
exceed this amount, an external transformer is required.
Hydro-Connect Zone Panels
The following pages include diagrams and menus showing how
to interface with the Hydro-Connect zone panels (Enertech P/N
HCC-NN-WVC-ZM for heating/cooling and ATEZVCA for heating
only). High level wiring diagrams show the interface points with
the EME/EMD terminal strip. Note that these examples can
be extended to more zones with extension modules (Enertech
P/N HCE-NN-WVC-ZM). Exact installation details may require
modification of these settings to suit the application.
1 2 3 4 5 6 7 8 9 10 11 12
NOTICE
: 7, 9, and 11 to be connected to common at the Hydro-Connect zone
panel (OC, Y2C, and Y1C). Pins 7 and 9 must be connected to the RC terminal
at the EWC zone board.
EAV Input Requirements from Zone Panel
The EME/EMD field wiring terminal board requires the following
dry contact input pairs:
HEAT:
Radiant heating demand input (outdoor reset controlled
temperature)
HHEAT
Air handler heating demand input (120°F outlet
temperature)
COOL:
Air handler cooling demand input (low temperature
water)
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CAUTION
⚠
THIS SYSTEM MUST USE DRY CONTACT INPUTS. DO NOT
SUPPLY 24VAC ACROSS THE TERMINALS.
Figure 20: Low Voltage Field Connection
Section 8: Field Wiring
⚠
NOTICE
⚠
When the fan coil will be used for heating and cooling, the
EAV unit provides 120°F water to the fan coil (HHEAT call).
When only radiant zones are calling (HEAT call), the water
temperature supplied to the floor is determined by the
radiant set point (or outdoor reset curve). If a radiant zone
is calling at the same time as the fan coil, 120°F water will
also be supplied to the floor.
Enertech recommends that a
dual sensing thermostat be used for radiant zones when the
fan coil will be used for heating to avoid overheating the slab.
If the fan coil is only used for cooling, the water temperature
sent to the floor will be based upon the radiant set point (or
outdoor reset curve).
