Enertech EAV060 - Diagram HTGCLG-2: Heating;Cooling - One Fan Coil with Duct Zoning (Cooling or Heating & Cooling) Up to 5 Radiant Heating Zones

Enertech Global 
EAV - EME/EMD Rev. A Models
Installaon and Operaons Manual
**This panel is wired from the factory as a cooling only fan coil for zone 1. If heating and cooling is desired for the zone 1 fan coil, make the following changes: 1. Remove the two red wires labeled A at the rst relay on the left. Using a quick-connect junction, plug the two red wires together. 2. Remove the black wire and the yellow wire from the second relay from the left (labeled B). Using a quick-connect junction, plug
the two wires (one black and one yellow) together.
R G CY C R W C R W C R W C R W C R WO
------------ ZONE 1 ------------ ---- ZONE 2 ---- ---- ZONE 3 ---- ---- ZONE 4 ---- ---- ZONE 5 ---- ---- ZONE 6 ----
R Y G
FAN COIL
OC O Y1C Y1
WV HEAT PUMP
FAN COIL
ZONE VALVE
RELAY
FAN COIL/
RADIANT RELAY
TRANSFORMER A
FAN COIL
ISOLATION
RELAY 1
FAN COIL
ISOLATION
RELAY 2
COILCOIL
COIL
COIL
COIL
COM
COMCOM
NC
NO
NC
NC NC
NO
NC
NO
NO NO
FAN COIL/
RADIANT RELAY
TRANSFORMER B
COIL
COM
NC NO
NO
NC
HEAT/COOL
RELAY
C
NO
NC
NC NO
Y2C Y2
COIL
COM
1 2
Expansion
HI TEMP
RELAY
A**
A**
B**
B**
1 2 3 4
ZONE 1
1 2 3 4
ZONE 2
1 2 3 4
ZONE 3
1 2 3 4
ZONE 4
1 2 3 4
ZONE 5
1 2 3 4
ZONE 6
2 WIRE ZONE VALVE
(NO END SWITCH) MUST USE JUMPER
TACO
3 WIRE
ZONE VALVE
1
2
3
JUMPER
3 & 4
MOTOR END
SWITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSING)
ZVC 406 – 4
ZONE VALVE CONTROL
N/O
COM
N/C
PUMP END
SWITCH
ZONE 6 PUMP
END SWITCH
24 VAC ZONE VALVES PRIORITY
X X
Powered from Transformer A Powered from Transformer B
Wiring from this terminal strip to the relays and Taco zone controller not shown in this diagram.
Thermostat wiring**
Field wiring is shown as gray shaded areas (high voltage wiring not shown)
OC O Y1C Y1 Y2C Y2 1 2
Expansion Module Connections***
***Expansion module provides an additional fan coil zone and an addtiional 5 radiant zones. Connect terminals from main module to the same terminals in the expansion module. If main module has been modied to allow heating and cooling in zone 1, the expansion module must also be modied. NOTE: If expansion module will also have zoning, wire zone panel as shown on this diagram. The expansion panel does not have an “O” terminal to connect to zone panel in zone 1, as the main panel determines
system heating/cooling mode.
R G CY1O
W1
C WGY1
R
Outputs to
Equipment
from EWC Ultra
Fan Coil
Optional eld
installed relay
if fan coil will
have backup
electric heat
EWC Ultra
Zoning Panel
Inputs from up to 4
zone thermostats
(connections not shown)
Outputs to zone dampers
(connections not shown)
4
Use these terminals to enable system pump (see piping diagrams).*
*These contacts will close with a call from any thermostat. For constant speed pump, use these contacts to power the pump when there is a htg/clg call (break the “L” terminal for a 115V pump). For variable speed pump, use these contacts to enable the pump (typically a contact closure will “tell” the pump to start modulating).
Secon 8: Field Wiring Diagram HTGCLG-2: Heang/Cooling One Fan Coil with Duct Zoning (Cooling or Heang & Cooling) Up to 5 Radiant Heang Zones***
⚠ CAUTION ⚠
ALL FAN COILS MUST BE 2 TONS OR LARGER FOR THIS APPLICATION. IF ANY FAN COIL IS SMALLER THAN 2 TONS, A BUFFER TANK IS REQUIRED (USE DIAGRAM HTGCLG-7 AND FIGURE 16C).
HHEATHEAT
COOL
EM
indoor
Module
⚠NOTICE ⚠
THE EM UNIT TERMINALS ARE POLARITY SENSITIVE. TERMINALS 7,9, & 11 ARE COMMON. ENSURE THAT OC, Y1C, AND Y2C ARE CONNECTED TO COMMON.
7 8 9 1011 12
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