McQuay FDD Series Installation & Maintenance Data page 22

Field Installed Options on MicroTech 2000 Units
MicroTech 2000 units can provide up to 4-outputs, that
can be configured for any of the following output control
signals:
1) Scheduled Output
When using a Network Master Panel (NMP) these
outputs can be assigned to one of 32 available
schedules. The output will energize when the assigned
schedule is occupied and de-energize when in
unoccupied. These outputs could be used to control
lights, etc.
2) Auxiliary Heat (Skin Heat)
When using a Loop Water Controller (LWC) the
MicroTech 2000 receives loop water temperature
information from the LWC and will use the Auxiliary
Heat output for heating when loop water temperature
is inappropriate for heat pump heating. These outputs
provide a signal that can be used to control a remote
electric heater. The output will energize on a call for
electric heat and de-energize when not required.
3) Fresh Air Damper
These outputs provide a signal that can be used to
control a remote fresh air damper. The output will
energize when the unit fan is energized and de-
energize when the unit fan is de-energized.
1st Control Signal Output
Terminal Boards
(Located externally on the WSHP chassis)
1 2 3 4 5 6 7
IMPORTANT:
To use onboard 24VAC,
change the jumper PF1 on the
MicroTech 2000 controller from
factory default pins 1 and 2 to
pins 2 and 3.
3rd Control Signal Output
Terminals Located in MicroTech 2000
Auxiliary Board
J7
4 3 2 1
Pilot Duty Relay
(by others)
Use contacts as needed for option
Page 22 of 24 / IM 407
E L U P C
24VAC
Pilot Duty Relay
(by others)
(by others)
24VAC
24VAC
4) Motorized Water Valve
These outputs provide control for a motorized water
valve that can be used to stop or divert flow away from
the WSHP when compressor operation is not needed.
The output will be energized when compressor
operation is required.
If more than one of the above control signals is required
on a single WSHP, the MicroTech 2000 Auxiliary Module
Kit (107239001) must be used and these additional output
control signals will be connected to the Auxiliary board.
1-circuit units can provide up to 4-outputs.
If the Auxiliary board is added in the field to provide
additional outputs it will need to be mounted within the
WSHP control box so that J1 on the Auxiliary board can
be connected to J6 on the MicroTech 2000 board without
exceeding a maximum wire length of 10".
Also, each output is by default configured to "none" and
must be field set to one of the four signal types listed
above using the Monitor software, cable, and a PC
communicating to the unit through an MCG panel.
2nd Control Signal Output
Terminals Located in MicroTech 2000
Auxiliary Board
J6
4 3 2 1
Pilot Duty Relay
(by others)
Use contacts as needed for option
4th Control Signal Output
Terminals Located in MicroTech 2000
Auxiliary Board
J10
4 3 2 1
Pilot Duty Relay
(by others)
Use contacts as needed for option
(by others)
24VAC
24VAC
(by others)
24VAC
24VAC