◦
+3V
SB1
SB2
COM
SEN3
SEN2
REF
Optional remote functions
PFC-ALV-RS and PFC-MLV-RS models ONLY
Remote Setback
Terminal Block
Remote Sensor
Terminal Block
Remote Sensor/Aquastat Option:
The remote sensor option features a dual mode external sensor
function. SEN2 is to be used only as a room temperature sensor
(order PSG
P-RS
). SEN3 is to be used only with the Electronic
Aquastat Kit (order PSG
P-AK
). The REF terminal is common to
both sensor inputs. To activate the SEN2 or SEN3 terminals see
programming instructions. Both sensor functions may be used at
the same time, having both electronic aquastat and remote room
temperature capability. When the remote sensor is connected, it
may be used to control the thermostat instead of the on board
sensor or it may be averaged with the on board sensor. Use only
3 conductor cable or shielded 2 conductor cable. Connect the
shield or the third wire to the COM terminal.
Remote Setback/Shutdown Option:
The remote setback features a dual mode function. SB1 is the input
for remote setback (economy) and SB2 is the input for remote
shutdown mode.
Setback mode
when energized will remotely
place the thermostat in economy mode using the programmable
economy heat and cool setpoints.
Shutdown mode
when energized
will remotely place the thermostat in disable mode. The thermostat,
at this time, will not call for heating or cooling until taken out of shut-
down mode.
To activate the setback or shutdown mode use dry contacts (relays
or mechanical switch) to connect the +3V terminal to the appropriate
SB1 or SB2 terminal. An open circuit on SB1 or SB2 will disable the
remote function.
A COM terminal is provided for active type remote switch gear such
as the electronic motion sensor. Do not use the COM terminal for
any other application.
+3V
SB1
SB2
COM
door
switch
window
switch
Dry contact connections
+3V
SB1
SB2
COM
window
switch
(-)
(+3vdc)
Motion Sensor and dry contact
Motion
Sensor
◦
◦
Mount the Electronic Aquastat Sensor to the water pipe. The best
location is to be as close to the main pipe as possible and attached
before the water valve connection.
IMPORTANT:
The electronic aquastat sensor replaces the bimetal switch
which is common in most 2-pipe heat/cool fan coil systems.
This allows for the thermostat to directly control the equipment
as well as provide for alterations in change-over temperature
thresholds. Follow the standard 4-pipe wiring diagram. Cool
wire will control the heat/cool valve, the heat wire will operate
as an auxilliary electric heat switch (depending on fan coil
equipment).
Isolate all of the unused wires.
Water
Main
Valve
Sensor
Wire
Ties
◦
◦
5
◦
Refer to the programming instructions for selecting the aquastat
sensor function, temperature changeover settings, output configurations,
purge frequency and purge time duration. The thermostat will monitor
pipe temperature every 5 seconds. For a valvelss systems, select
the
2Pn
configuration setting since this will bypass the valve purge
functions and provide heating or cooling based on pipe temperature
alone.
The
2PS
and
2PE
configurations operate with a valve purge function
to prevent incorrect temperature readings from static or standing water
in the pipe. The valve purge operates on a programmed interval
(purge frequency) for a programed duration (purge time duration)
in the event of low activity over an extended period of time.
If the heat or cool call has lasted for more than three minutes, the
pipe temperature heat or cool mode is rechecked to verify proper
operating mode.
Function charts on next page
SEN3
SEN2
REF
Room
Sensor
Aquastat Sensor
+3V
SB1
SB2
COM
◦
◦
◦
