Enertech Global
63
EAV - EME/EMD Rev. A Models
Installation and Operations Manual
Line (high) Voltage
A power block is provided for incoming power to the EME/EMD.
This circuit supplies power to all of the controls, internal pump,
and immersion heater (if equipped).
Note:
Reference the electrical data for circuit sizing.
Surge Protection
Due to the extensive use of digital controls within the EME/EMD,
Enertech recommends the use of Type 1 or Type 2 surge
protective devices (SPD). The system may be protected as part
of a whole house surge protector or the branch circuit can be
protected using an SPD such as the Compressor Defender
(Enertech P/N CD1-024R)
. Please check the NEC Article 285 and
your local codes regarding the use of SPDs.
Low Voltage
The EME/EMD field wiring provides dry contact inputs to
interface directly with industry standard zone controllers and
aquastats. These are indicated with the following input pairs:
Heat
: Radiant heating demand input
HHeat
: Air handler heating demand input (120°F outlet
temperature)
Cool:
Air handler cooling demand input (low temperature water)
DHW:
Domestic hot water thermistor (connect to thermistor
that is pre-installed in Turbomax tank)
OAT and OAT:
These Terminals are Not Used, The outdoor
sensor is located in the Outdoor Unit, BT28 Sensor.
Figure 18: Line Voltage Wiring
Line Voltage Wiring
Section 8: Field Wiring
Figure 19: Compressor Defender
Line Voltage
(L1 & L2)
⚠
NOTICE
⚠
The compressor defender should be installed on the line
voltage at the outdoor unit. Instead of breaking Y1 as shown
on the defender label, break the blue wire (not blue/black)
at the transformer connection at the outdoor unit.
