Daikin Enfinity VFC, Installation And Maintenance Manual

Page: 31 / 44

www .DaikinApplied .com 31 Enfinity Vertical Water Source Heat Pumps • IM 930-6
Motorized Isolation Valve & Relay
The motorized valve kit is available as a factory-installed
and wired option or may be ordered as a field-installed
accessory.
Wired as shown in Figure 29, the motorized valve will open
on a call for compressor operation. Valves for unit sizes
009 to 019 are 1/2" while unit sizes 024 to 070 are 3/4".
Using a Normally Closed (N/C), power open valve, wire
as illustrated in Figure 29.
Figure 29: Normally Closed, Power Open Motorized Valve
& Relay Wiring
Actuator &
Valve Assembly
Anti-short Bushing
Connector
Conduit
Pin(s), female
plug into receptacle
configuration below
Connector
Anti-short
Bushing
Note: Connectors on valve must be cut off and stripped
back and the wires twisted to make connections
to the IV/PR Terminals
Pump Restart Relay Kit P/N 061419001
The MicroTech III unit controller has an internal Pump
Restart Relay connected to H8, Pin 2 for the Normally
Open (N/O) terminal of the internal relay.
Connect to H8, Pin 1 for the Normally Closed (N/C)
terminal of the internal relay.
The output of the internal pump restart relay is 24-
volts AC and the output is not available when the H8
connection is used to control a motorized valve.
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: Multiple Unit Control Panel and Board
The multiple unit control board provides the components
necessary to protect the MicroTech III unit controller from
electrical damage that may occur when using standard
off-the-shelf relays.
Do not use the unoccupied (U-terminal) feature with the
multiple unit control board .
Figure 31: Wiring Multiple Unit Control Board (MUCP)
Multiple Unit Control Panel
Circuit Board
MicroTech III Unit Control Board
Low Voltage Terminal Strip
C G Y1
Y2 W1 W2 A
R O
Thermostat Terminals
W1 Y1 W2 Y2 G - C + R
RY
GW
RY
GW
RY
GW
RY
GW
C
K3
K2
K1
TB3
TB4
TB2
TB1
C G Y1 Y2 W1 W2
A
R O
C G Y1 Y2 W1
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 recom-
mended.
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.
a
dditional
a
CCessories
– g
eneral