Model 200DX
::
Ultimateair.com
::
Athens, Ohio 45701 :: 740.594.2277
Three-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.
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.
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).
D.
EconoCool input
: When this post receives a 24 VAC signal from I, J, or K, the
EconoCool function will be enabled.
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.
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.
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.
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.
