Enertech Global
74
EAV - EME/EMD Rev. A Models
Installation and Operations Manual
R
C
Y
O
--------
ZONE 1 --------
RH/RC
SWITCHING RELAY #1
COIL
COIL
NO
NC
NC
NO
COIL
COM
NC
NO
NO
NC
HE
AT/
COOL
REL
AY
NO
NC
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
CO
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
ansforme
r
B
Wiring from this terminal strip to the relays, Taco zone controller and HBX ECO-0550 not shown in this diagram.
Field wiring is shown as gray shaded areas (high voltage wiring not shown)
R
C1
Y1
O
Field installed relays Use Enertech part # 43P020-01NN for both.
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-7
: Hea
ting
/Cooling
Con
tr
ols t
o be Used when a Buff
er T
ank
Is Ins
talled (a
t leas
t one f
an c
oil is
smaller than 2 t
ons)
C
RC
RH
W/Y
--------
ZONE 3 --------
C
RC
RH
W/Y
--------
ZONE 4 --------
C
RC
RH
W/Y
--------
ZONE 5 --------
C
RC
RH
W/Y
--------
ZONE 6 --------
RH/RC
SWITCHING RELAY #2
TANK
O
R
Y2
Y1
-- HEAT PUMP/BACKUP BOILER --
T
T
HT
HT
CT
CT
- HOT TNK, COLD TNK, O.D. SENSOR -
OD
OD
HBX ECO-0550
Enertech
MPH
Fan Coil
Y2
W1
G
R
C
Y1
O
Heat Pump Thermostat
Y2
W1
G
RD
Multi-Aqua
Fan Coil
BL
L
YL
NO
TES 2,3
Zone Valve Connections
(t-stat connections
not shown)
Terminal L (SEC) is at circuit board.
C
RC
RH
W/Y
--------
ZONE 2 --------
W
Radiant Floor t-stat
R
C
NO
TES 2,3
NO
TE 4
NO
TE 1
R
HHEAT
Enertech EM Indoor Module
COOL
7
C
Thermistor to Buffer Tank
Thermistor for
Outdoor Air Temp
(for Outdoor Temp Reset)
ECO-0550 is the buffer tank controller
⚠
C
AU
T
IO
N
⚠
TRANS
FORMER MUST B
E
REMOVED
FROM EACH
FAN COI
L TO AVOID PHASI
NG
ISS
UES BETWEEN FAN COILS
AND THE ZON
E PANEL.
NO
TES:
1. Z
one 1 must use a hea
t pump ther
mosta
t, ev
en if the fan c
oil does not ha
ve
hea
t pump t
er
minals (Ener
tech fan c
oils ha
ve hea
t pump st
yle wir
ing).
2. R
C supplies 24V
AC the the ther
mosta
t in c
ooling mode; RH supplies 24V
AC
t
o the ther
mosta
t in hea
ting mode (based upon the mode of z
one 1). I
n
most cases
, RH and R
C will be jumper
ed f
or fan c
oils t
o allo
w hea
ting and
c
ooling
.
3. I
f R
C and RH ar
e jumper
ed in z
one 2, z
one 3 will also be a h
tg/clg z
one; if
R
C and RH ar
e jumper
ed in z
one 4, z
ones 5 and 6 will also be h
tg/clg z
ones
.
I
n this e
xample
, the r
adian
t z
ones should be used on z
ones 4, 5, and 6, sinc
e
z
ones 1, 2, and 3 ar
e hea
ting and c
ooling z
ones
. A
dding a r
adian
t z
one t
o
z
one 3 w
ould allo
w w
at
er flo
w thr
ough the floor in c
ooling
, which w
ould not
t
ypically be a good idea in most clima
tes
.
4.
The tank c
on
tr
oller only needs one buff
er tank ther
mist
or (t
er
minals HT
, HT
)
f
or a single tank
. T
he C
T, C
T t
er
minals ar
e not used with this applica
tion.
⚠
C
AU
T
IO
N
⚠
TRANS
FORMER I
N THE ZONE
PANEL WILL NEED TO B
E UP-
SIZED FOR THI
S APPLICATION
(SEE GEO-FLO INSTALLATI
ON
MANUAL FOR CALCULATIONS
).
8
9
10
3
4
⚠
NOTICE
⚠
THE EM UNIT TERMI
NALS
ARE
POLARITY SENS
ITIVE. TERMI
NALS
7 AND 9 ARE COMMON. ENSURE THAT 8 AND 10 ARE CONNECTED TO RELAY 1 AND THAT TERMI
NAL
9 I
S CONNECTED TO RELAY
2.
REL
AY 1
REL
AY 2
Heating/Cooling - Controls to be used when a Buffer Tank is installed (at least one fan coil is smaller than 2 tons)
Section 8: Field Wiring
