GEO-FLO UNIVERSAL PUMP CONTROLLER: UPC-GEO | 5
Wiring the Controller (Single Heat Pump -- Magna Geo Pump)
WARNING: OPEN THE POWER SUPPLY DISCONNECT SWITCH AND SECURE IT IN AN OPEN
POSITION PRIOR TO PERFORMING ELECTRICAL WORK. VERIFY THAT POWER HAS BEEN
DISCONNECTED PRIOR TO WIRING THE CONTROLLER. FAILING TO SECURE THE ELECTRI-
CAL SUPPLY COULD RESULT IN SERIOUS INJURY OR DEATH. THIS EQUIPMENT SHOULD BE
INSTALLED AND SERVICED BY QUALIFIED PERSONNEL ONLY.
NOTE: The Magna GEO 32-140 motor requires no external protection. Wiring the Magna GEO directly to mains
power is recommended. See Appendix C for more information.
NOTE: Low voltage wiring will vary depending on the installation and sensors used.
1.
Turn off power at the heating/cooling system or fuse/circuit breaker panel.
2.
Decide on where wires will enter the controller housing and remove the appropriate knock-outs.
3.
Figures 2a through 2d provide controller terminal descriptions and wiring for a single unit; Figure 3 shows
wiring for two heat pumps. Complete wiring using appropriately sized wire and replace controller’s cover.
NOTES:
A.
HP IN1: Left terminal receives 24VAC input from heat pump accessory output (labeled “ACC” or “A” by
some heat pump manufacturers). IMPORTANT: Some heat pump accessory relay contacts are not isolated
from the 24 VAC heat pump transformer, and may create a “dirty” power signal, especially heat pumps
with thermostat-controlled ECM fan motors (symptom includes variable speed pump not shutting off). An
additional relay will be required for these heat pumps (see Figure 2b). If an accessory terminal is not avail-
able, Figures 2c and 2d illustrate connections. Alternatively, ∆T mode may be used, which will only require
one relay (coil connected to Accessory and C; contacts connected to HP and IN1).
24
VAC
Input
to
P
owe
r
Cont
roll
er
(N
ote
3
)
24VAC
Input
Signal
(N
ote
2)
24VAC
Input
Signal
(N
ote
1)
Ma
gna
GEO
P
um
p
Input
/Output
Grundfos
D
irec
t
Se
nsor
Inpu
ts
1-
10
VD
C
Input
(not
us
ed
)
Ea
rt
h
Ground
Thermistor
Inputs
Y2
Brown
Bl
ac
k
Bl
ue
Entering
W
at
er
Therm
(f
rom
loop
)
Leaving
W
at
er
T
he
rm
(to
loop
)
Thermistors
Common
4-
pi
n
conn
ector
from
Grundfos
Flo
w
S
en
so
r
on
e
ith
er
Entering
O
R
Leaving
W
at
er
s
id
e
R C
LWT
EWT
OUT IN REF
PWM
HP IN1 HP IN2
LWT
EWT
C
THERMS
+
-
1-10 DCIN
24VAC INGND
AUXILIARY
L1
L2
N1 N2
OUT
OUT IN
IN
BRN BLK BLU
ACC
(Note A)
C
208-230 VAC Input/Output
Power to UPS26-99 (2nd pump)
for two pump flow centers. Do
not connect Magna GEO single
pump flow center to this
terminal block.
Line V
oltage W
iring
(115V or 230V
)
UPS26-99 (2nd pump)
Do not connect to
Magna GEO pump.
115V
or 230V
pump
(Note B)
(Note C)
Figure 2a: Wiring Diagram:
Single heat pump (isolated
accessory relay for Y2)
IMPORTANT:
Controller must
be grounded.
