Enertech Global
70
EAV - EME/EMD Rev. A Models
Installation and Operations Manual
**
This panel is wir
ed fr
om the fac
tor
y as a c
ooling only fan c
oil f
or z
one 1. I
f hea
ting and c
ooling is desir
ed f
or
the z
one 1 fan c
oil
, make the f
ollo
wing changes:
1. R
emo
ve the t
w
o r
ed wir
es labeled A a
t the first r
ela
y on the lef
t. U
sing a quick
-c
onnec
t junc
tion, plug the t
w
o r
ed wir
es t
ogether
.
2. R
emo
ve the black wir
e and the y
ello
w wir
e fr
om the sec
ond r
ela
y fr
om the lef
t (labeled B). U
sing a quick
-c
onnec
t junc
tion, plug
the t
w
o wir
es (one black and one y
ello
w) t
ogether
.
R
G
C
Y
C
R
W
C
R
W
C
R
W
C
R
W
C
R
W
O
------------
ZONE 1 ------------
----
ZONE 2 ----
----
ZONE 3 ----
----
ZONE 4 ----
----
ZONE 5 ----
----
ZONE 6 ----
R
Y
G
FAN
COIL
OC
O
Y1C
Y1
WV HE
AT PUMP
FAN
COIL
ZONE
VA
LVE
REL
AY
FAN
COIL/
RADIANT REL
AY
TR
ANSFORMER A
FAN
COIL
ISOL
ATION
REL
AY 1
FAN
COIL
ISOL
ATION
REL
AY 2
COIL
COIL
COIL
COIL
COIL
COM
COM
COM
NC
NO
NC
NC
NC
NO
NC
NO
NO
NO
FAN
COIL/
RADIANT REL
AY
TR
ANSFORMER B
COIL
COM
NC
NO
NO
NC
HE
AT/
COOL
REL
AY
C
NO
NC
NC
NO
Y2C
Y2
COIL
COM
1
2
Expansion
HI TEMP REL
AY
A**
A**
B**
B**
1
2
3
4
ZON
E 1
1
2
3
4
ZON
E 2
1
2
3
4
ZON
E 3
1
2
3
4
ZONE 4
1
2
3
4
ZONE 5
1
2
3
4
ZON
E 6
2 WIRE ZON
E
VA
LVE
(N
O EN
D SWITCH)
MUST USE JUMPER
TA
C
O
3
W
IR
E
ZO
N
E
VA
LV
E
1
2
3
JUMPER 3 & 4
MOTO
R
EN
D
SW
ITCH
4 WIRE ZONE VALVE
(POWER OPEN,
SELF CLOSIN
G)
ZVC 406 – 4
ZON
E VA
LVE CONTROL
N/
O
COM
N/
C
PUMP EN
D
SW
ITCH
ZON
E 6 PUMP
EN
D SWITCH
24 VA
C ZON
E VALVES
PRIORITY
X
X
Powere
d from Transformer
A
Powe
red from Tr
ansformer
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 modified to allow heating and cooling in zone 1, the expansion module must also be modified. 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
C
Y1
O
W1
C
W
G
Y1
R
Outputs to Equipment
from EWC Ultra
Fan Coil
Optional field 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
U
se these t
erminals
to enable sy
st
em
pump (see piping diagr
ams).*
*T
hese c
on
tac
ts will close with a call fr
om
an
y ther
mosta
t. F
or c
onstan
t speed pump
,
use these c
on
tac
ts t
o po
w
er the pump
when ther
e is a h
tg/clg call (br
eak the
“L
”
t
er
minal f
or a 115V pump
). F
or v
ar
iable
speed pump
, use these c
on
tac
ts t
o enable
the pump (t
ypically a c
on
tac
t closur
e will
“
tell
” the pump t
o star
t modula
ting).
Section 8: Field Wiring
Diagr
am HT
GCL
G-2
:
Hea
ting
/Cooling
One F
an Coil with Duct Z
oning
(Cooling or Hea
ting & Cooling)
Up t
o 5 Radian
t Hea
ting Z
ones***
⚠
C
AU
T
IO
N
⚠
ALL FAN COI
LS
MUS
T BE 2 TONS
OR LARGER FOR
THI
S APPLICATION. I
F AN
Y FAN
COIL IS
SMALLER
THAN 2 TONS, A BUFFER TANK I
S REQUIRED
(US
E DI
AGRAM HTGCLG-7 AND FI
GURE 16C).
HHEAT
HEAT
COOL
EM
indoor Module
⚠
NOTICE
⚠
THE EM UNIT TERMI
NALS
ARE
POLARITY SENS
ITIVE. TERMI
NALS
7,9, & 11 ARE COMMON. ENSURE
THAT OC, Y1C, AND Y
2C ARE
CONNECTED TO COMMON.
7
8
9
10
11
12
Diagram HTGCLG-2: Heating/Cooling - One Fan Coil with Duct Zoning (Cooling or Heating & Cooling) Up to 5
Radiant Heating Zones***
Section 8: Field Wiring
