Specifications

IM 1060-3 / Page 25 of 32
Motorized Valve/Pump Restart Output
The MicroTech III controller output, IV/PR (H8) is used to
energize a motorized valve actuator or start a water pump, to
allow100%waterowthroughtheunitpriortostartingthe
compressor. See Figure 28 on page 24 for wiring termina-
tion details. The output voltage is 24 VAC. A separate 24
VAC relay may be required between the control board and the
controller device depending on power requirements.
Multiple Unit Control (up to 3 units) (P/N
056794201)
The multiple unit control board is an accessory used when up
to 3-units are controlled from a single thermostat. Typically
the control panel and board is centrally mounted between the
units and thermostat. A maximum of 2 boards may be used
together if up to 6-units must be connected and controlled
from a single thermostat. For detailed installation instructions
refer to IM 952.
This version of the control uses VAC relays and should not be
used in combination with any other accessories or equipment
that require VDC connections.
Figure 30: Wiring Multiple Unit Control Board (MUCP)
Multiple Unit Control Panel
Circuit Board
MicroTech III Unit Control Board
Low Voltage Terminal Strip
C
G
Y1
Y2W1
W2
A
R
O
Thermostat Terminals
W1
Y1
W2
Y2
G
-
C
+
R
RYGW
RYGW
RYGW
RYGWC
K3
K2
K1
TB3
TB4
TB2
TB1
C
G
Y1
Y2W1
W2
A
R
O
C
G
Y1
Y2W1
W2
A
R
O
TB2 - Unit #1
TB2 - Unit #2
TB2 - Unit #3
Notes: Dotted lines represent low voltage (Class II) wiring; a color-coded thermostat cable is recommended.
MUCP may be mounted horizontally or vertically on heat pump cabinet or any convenient surface.
Do not use if using night setback.
Thermostat must be A.C. voltage.
Figure 31: Multiple Unit Control Panel and Board
The multiple unit control board provides the components
necessary to protect the MicroTech III controller from electri-
cal damage that may occur when using standard off-the-shelf
relays.
Do not use the unoccupied (U-terminal) feature with the mul-
tiple unit control board.