Phoenix PHS300-x, PCS300-x, PCS300-x-DOC Installation Manual

PHS/PCS300 SERIES INSTALLATION GUIDE

Section 1. Product Description

The PHS300-x is a room humidity sensor. The PCS300-x is a
combination temperature and humidity room sensor. The PCS300-x­DOS has a large LCD display, slider setpoint adjustment, and override
button.

Depending on model, the analog outputs are a humidity sensor output
(defined in the table below), a 10 KΩ type 2 thermistor sensor,
0-20 KΩ temperature setpoint, and an override contact. All units come
standard with a 3.5 mm (1/8"), easy access communication jack
providing direct network access. All PCS units also include an internal
three position Low/Normal/High test and balance switch.

Model Humidity Sensor Signal

PHS300-x Default: 4-20 mA

Field selectable to: 0-5 or 0-10 Vdc

PCS300-x Default: 4-20 mA

Field selectable to: 0-5 or 0-10 Vdc

PCS300-x-DOS Default: 4-20 mA

Field selectable to: 0-5 or 0-10 Vdc

MODELS PHS300-x, PCS300-x, and PCS300-x-DOS

(where -x defines the enclosure style)

Figure 2. PCS300-x-DOS with display, override, and

slider temperature setpoint

Figure 1. PHS300-x and PCS300-x sensors only

Section 2. General Installation
Requirements

For proper installation and subsequent operation of each controller,
pay special attention to the following recommendations:

• It is recommended that the sensor(s) be kept at room temperature
for at least 24 hours before installation to allow any condensation
that may have accumulated due to low temperature during
shipping/storage to evaporate.

• Upon unpacking the product, inspect the contents of the carton
for shipping damages. Do not install damaged controllers.

• Allow for proper clearance of sensor enclosure, wiring terminals
and hardware configuration and maintenance.

• Each controller is designed to operate under the following
environmental conditions:

• Ambient temperature from 32°F to 122°F (0°C to 50°C)

• Relative humidity from 0% to 95%, non-condensing

• Ensure proper ventilation of each sensor and avoid areas where
corroding, deteriorating or explosive vapors, fumes or gases may
be present.

• Do not drop the sensor or subject it to physical shock.

If the controller is used and/or installed in a manner not specified by
Phoenix Controls, the functionality and the protection provided by the
sensor may be impaired.

CAUTION

Any type of modification to any Phoenix Controls
product will void the product's warranty.

NOTE

75 Discovery Way • Acton, MA 01720 • Tel [phone] • Fax [phone] • www.phoenixcontrols.com

©2014 Phoenix Controls Specifications subject to change without notice. Rev. C 650-321-017 08/16 PCS300 SERIES INSTALLATION GUIDE 1 OF 12

Take special care to keep the front and back plate aligned
when separating and joining them.

WARNING

Take reasonable precautions to prevent electrostatic
discharges to each sensor when installing, servicing
or operating the controller. Discharge accumulated
static electricity by touching one's hand to a securely
grounded object before working with each
controller.

2.1 Mounting Instructions

NOTE

Mounting hardware is provided for both junction box
and drywall installation.

2.1.1 Junction Box

DO NOT CUT OUT THE ENTIRE JUNCTION BOX
DIMENSION. The base plate will not fully cover the opening.

1. Pull the wire through the wall and out of the junction box,
leaving about six inches free.

2. Pull the wire through the hole in the base plate.

3. Secure the base to the box using the #6-32 x 1/2" mounting
screws provided.

4. Terminate the unit according to the Termination section.

5. Attach Cover by latching it to the top of the base, rotating the
cover down and snapping it into place.

NOTE

In wall-mount applications, the wall temperature and
the temperature of the air within the wall cavity can
cause erroneous readings. The mixing of room air and
air from within the wall cavity can lead to
condensation, erroneous readings and premature
failure of the sensor. To prevent these conditions, do
the following for the mounting method used:

• Junction box - seal the conduit leading to the
electrical box

• Drywall - ensure that the foam insulating pad on
the back of the enclosure covers the hole in the
wall.

6. Secure the cover by backing out the lock-down screws using a
1/16" Allen wrench until they are flush with the bottom of the
cover.

2.1.2 Drywall Installation

1. Place the base plate against the wall where you want to mount
the sensor.

2. Using a pencil mark out the two mounting holes and the area
where the wires will come through the wall.

3. Drill two 3/16" holes in the center of each marked mounting
hole. Insert a drywall anchor into each hole.

4. Drill one 1/2" hole in the middle of the marked wiring area.

5. Pull the wire through the wall and out of the 1/2" hole, leaving
about six inches free.

6. Pull the wire through the hole in the base plate.

7. Secure the base to the drywall anchors using the #6 x 1 inch
mounting screws provided.

8. Terminate the unit according to the Termination section.

9. Attach cover by latching it to the top of the base, rotating the
cover down and snapping it into place.

10. Secure the cover by backing out the lock-down screws using a
1/16" Allen wrench until they are flush with the bottom of the
cover.

2 OF 12 PCS300 SERIES INSTALLATION GUIDE 650-321-017 08/16 ©2014 Phoenix Controls Specifications subject to change without notice. Rev. C

2.2 General Wiring Recommendations

CAUTION

Turn off power before any kind of servicing.
Please note that there may be multiple power sources.

2.2.1 Phoenix Controls Wiring Recommendations

• Use cables recommended by Phoenix Controls (refer to Phoenix Controls Cables on page 12).

• Stranded wire of at least 22 AWG is strongly recommended for all wire connections. Larger gauge wire may be required for long runs.

• Follow good wiring practices:

• Do not run the signal cable in the same conduit or wireway as the power cables.

• If the signal cable must cross power cables, it is best to do so at a 90-degree angle.

• Maintain a consistent color code or polarity all the way through the wiring system.

• All wiring must comply with the National Electric Code (NEC) and local codes.

• Do NOT run this device's wiring in the same conduit as AC power wiring of NEC class 1, NEC class 2, NEC class 3 or with wiring used to
supply highly inductive loads such as motors, contactors and relays.

• Tests show that fluctuating and inaccurate signal levels are possible when AC power wiring is present in the same conduit as the signal lines.
If you are experiencing any of these difficulties, please contact your Phoenix Controls Representative.

• Local and national electrical codes take precedence.

Sensor connections:

• Remove the front plate from the back plate to facilitate the wiring process.

• Use a small flat screwdriver to tighten the terminal connector screws once the wires have been inserted.

• The board connectors accept wires or flat cables ranging from 22 to 14 AWG (0.64-1.63 mm diameter) per pole. However, power cables
must remain between 18 and 14 AWG (1.02-1.63 mm diameter).

Power connections:

• Power type cables (i.e., for power, 2- and 3-wire voltage and current inputs and outputs, as well as triac outputs) should be kept apart from
other types of wiring to avoid any ambient noise transmission to other wires.

• Do not connect the universal inputs, analog/digital outputs or common terminals to earth or chassis ground (unless stated otherwise).

CAUTION

Phoenix Controls does not recommend wiring the sensor with power applied as accidental arcing may damage the product and
will void the warranty.

©2014 Phoenix Controls Specifications subject to change without notice. Rev. C 650-321-017 08/16 PCS300 SERIES INSTALLATION GUIDE 3 OF 12

2.2.2 PHS300-x, PCS300-x, and PCS300-x-DOS Wiring

Figure 3. PHS300-x, PCS300-x, and PCS300-x-DOS connections

NOTE

PHS300-x, PCS300-x, and PCS300-x-DOS Wiring with Jumper in: 4 to 20 mA Setting

The PHS300-x and PCS300-x do not have OVR or SET terminals and the EXT-OVR and SEN terminals are non-functional.

Terminal Applicable to: Option Description

OVR1 and OVR2 PCS300-x-DOS

only

SET1 and SET2 PCS300-x-DOS

only

SEN1 and SEN2 PCS300-x and

PCS300-x-DOS

EXT-OVR PCS300-x-DOS

only

O Occupancy override status:

N.O. contact output (300 mA @ 24 Vdc)

S Temperature setpoint:

0 -20 KΩ output

Temperature sensor:

10K-2 thermistor output

D External "person" icon override:

Bypass control (from Phoenix valve) indication; "person" icon is solid (occupied) when
this pin is switched to power ground (see Bypass/External "Person" Icon Control on page 7 )

VOUT All Not used

V+ All Humidity sensor: 4-20 mA output

GND All 24 Vdc power (see Specifications on page 10 for details)

4 OF 12 PCS300 SERIES INSTALLATION GUIDE 650-321-017 08/16 ©2014 Phoenix Controls Specifications subject to change without notice. Rev. C