Enertech EAV060 - Diagram HTGCLG-3: Heating;Cooling - A-Coil with Fossil Furnace Backup (A-Coil Cooling or Heating & Cooling) Up to 5 Radiant Heating Zones

Enertech Global 
EAV - EME/EMD Rev. A Models
Installaon and Operaons Manual
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)
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).
R G CYO
W
C WGY
R
Dual Fuel
Heat Pump
Thermostat
Furnace
**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 A-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.
Secon 8: Field Wiring Diagram HTGCLG-3: Heang/Cooling A-Coil with Fossil Furnace Backup (A-Coil Cooling or Heang & Cooling) Up to 5 Radiant Heang Zones
⚠ CAUTION ⚠
A-COIL MUST BE 2 TONS OR LARGER FOR THIS APPLICATION. IF A-COIL IS SMALLER THAN 2 TONS, A BUFFER TANK IS REQUIRED (USE DIAGRAM HTGCLG-7 AND FIGURE 16C).
HHEATHEAT
COOL
EM
indoor
Module
7 8 9 1011 12
⚠NOTICE ⚠
THE EM UNIT TERMINALS ARE POLARITY SENSITIVE. TERMINALS 7,9, & 11 ARE COMMON. ENSURE THAT OC, Y1C, AND Y2C ARE CONNECTED TO COMMON.
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