Model ER80M
::
ultimateair.com
::
Athens, Ohio 45701 :: 740.594.2277
3-Motor Main Control Board
Description
A.
F2
: Wiring input from auxiliary air handler. 24 VAC
common. In some cases “C” post from thermostat
wiring on the furnace. When using this input,
REMOVE jumper at L – JP4. Wired out to AUX jack.
B.
F1
: Wiring input from auxiliary air handler. 24 VAC
line. In some cases “G” post from thermostat wiring
on the furnace. When using this input, REMOVE
jumper at L – JP4. Wired out to AUX jack.
C.
Boost input
: When this post receives a 24 VAC from I, J, or K, the unit will be turned on,
and to high speed (max air flow). Wired out to AUX jack.
D.
EconoCool input
: When this post receives a 24 VAC signal from I, J, or K, the EconoCool
function will be enabled. Wired out to AUX jack.
E.
Temperature input A
: Temperature thermistor located at the incoming air stream (duct
1) connects through this input.
F.
RET 3: 24 VAC return post. Common from the internal transformer. Wired out to AUX
jack.
G.
RET 2: 24 VAC return post. Common from the internal transformer.
H.
RET 1: 24 VAC return post. Common from the internal transformer.
I.
LINE 3: 24 VAC line post. Line voltage from the internal transformer. Wired out to AUX
jack.
J.
LINE 2: 24 VAC line post. Line voltage from the internal transformer.
K.
LINE 1: 24 VAC line post. Line voltage from the internal transformer.
L.
JP4
: Used to enable or disable on/off control from outside source via F1 and F2.
REMOVE this jumper when controlling the ERV via F1 and F2 outside 24VAC signal.
M.
RED LED
: Main 24VAC power LED. This should be lit anytime main power switch is on.
Indicates there is 24VAC power to this control board.
N.
JMP3
: Offset / DP Set point jumper. See Air Flow Offsets
O.
JMP2
: Offset / DP Set point jumper. See Air Flow Offsets
P.
J3
: When J3 is in the 0-10V position, Z - JMP1 MUST be in the EU position. J3 Selects
control input from either the Wall Dial Control, or a 0-10V DC input voltage (at T and V).
Q.
Programming jumper
. Must be in place for RecoupAerator to operate. Remove for
programming.
R.
J6
: When supply air is ducted to a forced air system- this setting used to set minimum
airflow to 70CFM. ‘1’ position. ‘0’ position is normal flow range.
S.
J7
: Relay selection. Jumper selects whether the normally open relay (X) closes when the
unit turns on (position I/O), or as controlled by TempA input when in the temp position.
Default is position I/O.
T.
0-10V DC input
: When J3(P) is in the 0-10V position, a positive line voltage 0-10V DC
may be used to control the RecoupAerator operation. When J3 is in 0-10V position,
JMP1 MUST be in EU position for the 0-10V input to work. Wired out to AUX jack.
U.
Not connected. Empty socket.
V.
0-10V DC input:
When J3 is in the 0-10V position, this post connects to the negative
side of the 0-10V DC control. Wired out to AUX jack.