Accutrol ZPS-H User manual
www.accutrolllc.com 1ZPS-H QUICK START GUIDE Rev. L 11/4/2020
Note: Please read this entire document to familiarize yourself with the installation and wiring
instructions for the ZPS-H Hood Presence Sensor. For additional details, refer to the individual product
Submittal Drawings, User Manuals and Job-Specific Requirements.
OVERVIEW
The ZPS-H Zone Presence Sensor is an optional sensor used with the AVC Fume Hood Control System, which will
cause the Fume Hood Monitor to revert to the Setback mode when no one is standing in front of the hood thus reducing
the exhaust requirements. Upon the return of the occupant to the front of the hood, the ZPS-H will immediately signal
the AVC Fume Hood Control System to return to the normal working velocity set point.
STEP 1: INSTALLATION
Caution: Wear eye protection, cut resistant gloves and clothing suitable for working with sheet metal.
Failure to do so may result in personal injury.
1a. Location
Select a flat surface on the front of the fume hood above the operator. Verify there is enough clearance behind the
panel to accommodate the two mounting screws and the cable. If the location is suitable, adhere the mounting template
to the surface.
1b. Prepare the Area
Using the mounting template as a guide, drill two holes for the mounting screws and one hole for the cable.
Caution: Be sure to deburr the cable hole prior to inserting cable through the hole to prevent cable
damage.
Insert the provided cable through the hole from the front of the hood so that the terminal block is on the front of the
panel. Insert mounting screws provided with kit partially, leaving space under the screw heads to slip the sensors slotted
holes under.
Power Cable and partially installed Screw Insert Screwdriver and Pry Upwards to Remove Cover
Quick Start Guide
ZPS-H (Zone Presence Sensor for Fume Hood Applications)
Sash
ToAVC
Exhaust Duct
Front HoodPanel ZPS-H (On top of
Hood)
Pictured is the top-down view of the hood
showing ZPS-H cable routing. Be sure the
sash and any of its moving parts do not
interfere with the Zone Presence Sensor
Cable.
www.accutrolllc.com 2ZPS-H QUICK START GUIDE Rev. L 11/4/2020
1c. Mounting
Install the circuit board under the screw heads shown below. Carefully hand tighten the screws in the position shown.
1d. Wiring
Connect the cable terminal block to the pins in the upper left corner of the ZPS-H sensor board and pull any extra cable
through the hole. Route the cable to avoid moving hood sash components.
Reference the wiring diagram pictured below
Connect the red and black wire from the ZPS-H to the power supply shared with the AVC controller.
Connect the brown and white wires from the ZPS-H to the AVC at DI-1.
WIRING TABLE
ZPS-H
AVC
RED
24V (+)
BLACK
24V (Gnd)
BROWN
DI-1 (1)
WHITE
DI (Gnd)
GREEN
No
Connection
Slotted holes
fit over screws
ZPS-H
RED:12-24 V AC/DC
BLACK: 12-24 V AC/DC
BROWN: Relay N.C.
GREEN: Relay N.O.
+ -
+ -
Connect to
Accutrol
Device using
factory cable
DEVICE PORT
OR
Power
Source
24 VAC
24 VDC
+
-
+ -
WHITE: GND
www.accutrolllc.com 3ZPS-H QUICK START GUIDE Rev. L 11/4/2020
STEP 2: START UP
2a. Power up
Apply Power to unit and wait for LEDs to illuminate.
LED lights solid (Green = no detection, Red = detection)
2b. Adjustment of Switch Positions
Verify all switch positions are set to factory default as shown to the right.
Note: Factory Default Switch Positions are Highlighted grey.
2c. Adjustment with Cover Off
To quickly adjust pattern, press and release the Reset Button and then press and hold the Install Button for 3 seconds
(the LED will flash orange to confirm). This puts the ZPS-H into an install mode that is constantly sensing, but not
driving the signal to the AVC. Test unit by walking in and out of the area in front of the hood, watch the LED and it will
turn red when it senses a person.
The sensor should be activated regardless if the person walks towards or away from it. If the unit does not sense
presence appropriately, tip the sensor head in or out until it does. Walk in and out of the area several times to test.
2d. Sensitivity Adjustment
If you need to increase the sensitivity of the ZPS-H, adjust the knob marked “range” clockwise. When you are satisfied
with the sensitivity of the unit, depress the Reset Button again and the ZPS-H will go into Normal Operating mode.
SW
#
SWITCH POSITION
DESCRIPTIONS
LEFT
RIGHT
6
NOT USED
NOT USED
5
FAILSAFE
OFF
FAILSAFE
ON
4
HPR OFF
HPR ON
3
NOT USED
NOT USED
2
DEPART
APPROACH
1
BI-
DIRECTION
UNI-
DIRECTION
Install Buon
Reset Buon
Range Sensivity
www.accutrolllc.com 4ZPS-H QUICK START GUIDE Rev. L 11/4/2020
2e. Adjusting the Set Points and Delays using Insight
After the controller is tuned and operating at normal velocity set point, the technician should configure DI#1 as Normally
Closed, and set the delay period so the AVC as a fume hood controller switches set points safely according to the
customer’s requirements. These adjustments are made in the Insight software by pressing the MODE button on the
Airflow Setpoint gauge and then select “Configure Control Setpoints” as shown below.
In the Configure Control Setpoint window, Select Enable next to DI-1 and a drop-down table will appear. This is where
you select which velocity setpoints are used for each position of Digital Input #1. Since we are only using DI #1, there
are only two conditions to be concerned about, open and closed.
Based on the wiring instructions provided in the previous section, the ZPS-H contacts will be closed when presence is
not detected in front of the fumehood and open when presence is detected. For this example, the Face Velocity
Setpoints will change from 100 FPM to 80FPM when presence is no longer detected at the fume hood.
Note the 300 second out delay prevents the Fume Hood Controller from changing its face velocity setpoint to 80 fpm
until five minutes after the ZPS-H detects no movement.
2f. Verification
Once the ZPS-H is set up, verify that the Digital Input of the AVC is configured to trigger the setback to lower flow and
test entire system by walking in front of the hood to verify that the hood responds appropriately. Repeat walking test to
verify proper operation. (You may have to stand out of the area in front of the hood to give time for the AVC Fume Hood
Controller to revert to the Setback of the reduced velocity setpoint.)
When you are satisfied with the operation of the sensor, replace cover by engaging the cover on left side first then snap
down. Be careful not to change the position of the swivel sensor and move the sensor wires out of the way so they are
not pinched. The cover will not change the sensitivity of the ZPS-H.
Replacing the Cover
For additional technical support please call Accutrol at 203-445-9991.
Caution: Be sure to have a
sufficient time delay to prevent the valve
from entering unoccupied mode while
the hood is in use.
Table of contents
