Carrier WSHP Open v3 Integration Manual

WSSHHPP OOppeenn vv33

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Introduction .................................................................................................................................................................. 1

Wiring inputs and outputs ........................................................................................................................................... 4

Installation ................................................................................................................................................................... 5

Troubleshooting ......................................................................................................................................................... 22

Compliance ................................................................................................................................................................ 27

Appendix A: Network Points List for WSHP Open .................................................................................................. 28

Appendix B: BACnet Protocol Implementation Conformance Statement ........................................................... 32

Appendix C: Modbus Protocol Implementation Conformance Statement........................................................... 33

Appendix D: Johnson Controls N2 Protocol Implementation Conformance Statement ..................................... 35

Appendix E: LonWorks Protocol Implementation Conformance Statement ....................................................... 37

Index ........................................................................................................................................................................... 38

Table of Contents

What is the WSHP Open controller? .................................................................................................................. 1

Safety Considerations .......................................................................................................................................... 3

Communications wiring - protocols ................................................................................................................... 5

Protocol Overview .................................................................................................................................. 5

Configuring for BACnet MS/TP ............................................................................................................. 6

Configuring for Modbus RTU ................................................................................................................. 7

Configuring for N2 ................................................................................................................................. 9

LonWorks ............................................................................................................................................. 10

Configuring for LonWorks Option Card (Part #LON-OC) ......................................................... 11

Commissioning the controller for LonWorks communication ................................................ 12

Start-up ................................................................................................................................................ 12

Sequence of Operation ....................................................................................................................... 13

Scheduling ................................................................................................................................ 13

Fire/Smoke detector input ...................................................................................................... 14

Shutdown input ........................................................................................................................ 14

Indoor fan ................................................................................................................................. 14

Cooling ...................................................................................................................................... 15

Reverse cycle heating .............................................................................................................. 16

Auxiliary heat ............................................................................................................................ 17

Indoor air quality (IAQ) and demand control ventilation (DCV) .............................................. 18

Dehumidification ...................................................................................................................... 18

Waterside economizer ............................................................................................................. 19

Demand limiting ....................................................................................................................... 20

Power failure restart delay ....................................................................................................... 20

Alarms ....................................................................................................................................... 20

LED's .................................................................................................................................................................... 22

BACnet MS/TP ................................................................................................................................................... 23

Modbus ................................................................................................................................................................ 25

Johnson N2 ......................................................................................................................................................... 25

LonWorks ............................................................................................................................................................ 26

FCC Compliance ................................................................................................................................................. 27

CE Compliance ................................................................................................................................................... 27

BACnet Compliance........................................................................................................................................... 27

WSHP Open v3 i

What is the WSHP Open controller?

J12

Introduction

The Water Source Heat Pump (WSHP) controller is available as an integrated component of a Carrier packaged unit. Its internal application programming provides optimum performance and energy efficiency. WSHP Open enables the unit to run in 100% stand-alone control mode or it can communicate to the Building Automation System (BAS).

On board DIP switches allow you to select the baud rate and choose one of the following protocols:

• BACnet

• Modbus

• Johnson N2

• LonWorks

Carrier’s diagnostic display tools such as BACview®6 Handheld device or Virtual BACview application can be used with the WSHP Open controller via the 5-pin

Access port. Refer to illustration below.

WSHP Open v3 1

Introduction

CAUTION

LonWorks points will be lost.

2 WSHP Open v3

If there is a jumper on the Format pins and power is cycled to the controller, all Modbus, N2, and

Safety Considerations

Disconnect electrical power to the WSHP Open before wiring it. Failure to follow this warning could cause electrical shock, personal injury, or damage to the controller.

When you handle the WSHP Open:

• Do not contaminate the printed circuit board with fingerprints, moisture, or any foreign material.

• Do not touch components or leads.

• Handle the board by its edges.

• Isolate from high voltage or electrostatic discharge.

• Ensure that you are properly grounded.

WSHP Open v3 3

Wiring inputs and outputs

WSHP Open Inputs and Outputs Table

Inputs J13

J4 AI

Outputs

J22

J1 BO

Dehumidification Relay

N/A

* J11

BO - 6

Fan Speed Medium/Low

N/A

J11

BO - 7

J11

Wiring inputs and outputs

Input/Output Type

Part Numbers

Type of I/O

Connection Pin

I/O Channel

Numbers

Space Temperature Sensor SPS, SPPL, SPP Communicating

Space Relative Humidity 33ZSENSRH-02

Indoor Air Quality 33ZCSPTCO2

Condensate Switch N/A

Stage 1 Compressor Status N/A

Leaving Condenser Water Temp 10K Type II

Supply Air Temperature 33ZCSENSAT

Supply Fan Status N/A

Occupancy Contact N/A

Smoke Detector Input** N/A 24 Vac

Aux Heat - Modulating (HW Valve/Water Econ)

Outside Air Damper N/A

Supply Fan On/ Low speed (3-speed only) W2-Aux Heat or 2-pos. Water

Economizer Reversing Valve (B or O) N/A

Y2-Compressor 2nd stage N/A

Y1-Compressor 1st stage N/A

(3-speed Only) Fan Speed High/Low (3-speed Only) Legend

- Analog Input

- Digital Input

*These outputs are configurable. **24 Vac required at this terminal to provide unit operation. Connect an isolated N.C. smoke detector contact (or jumper) between 24 Vac

- 9.

and

- Analog Output

- Digital Output

N/A

(4-20 mA)

(Dry Contacts)

(10K Thermistor)

(Dry Contacts)

(0-10 Vdc/

2-10 mA)

(0-10 Vdc/

2-10 mA)

Relay (24 Vac, 3A)

, 1 - 4

- 5 & 6

- 2 & 3

- 2

- 10

- 1 & 2

- 3 & 4

- 1 & 2

- 9

- 4 & 5

- 1 & 2

- 4

- 5

- 6

- 7

- 8

- 7 & 8 (N.O.)

- 5 & 6 (N.O.)

- 2 & 3 (N.O.)

Local Access Port

AI - 1

AI - 2

BI - 3

BI - 5

AI - 6

AI - 7

BI - 8

24 Vac IN

AO - 1

AO - 2

BO - 1 (G)

BO - 2

BO - 3 (RV)

BO - 4 (Y2)

BO - 5 (Y1)

BO - 8

4 WSHP Open v3

Communications wiring - protocols

Protocol Overview

SW3

MSB

SW1

LSB (SW2

J19

J15

NOTES

MSB (SW1

LSB (SW2

J15

SW3 Switch Settings Table

Protocol Selection

Baud Rate

Protocol

DS8

DS7

DS6

DS5

DS4

DS3

DS2

DS1

BACnet MS/TP

Modbus

Lonworks

Baud Selection Table

Baud Rate

SW3/DS2

SW3/DS1

9,600

19,200

38,400

76,800

Installation

Protocols are the communication languages spoken by the control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide specific information for different applications.

In the BAS application, many different protocols are used, depending on manufacturer. Different protocols do not change the function of the controller, but they typically require the owner to change systems or components in order to change from one protocol to another. The WSHP Open is an effective solution to minimize the amount of controllers that you may need to change in order to communicate with different types of protocols.

You can set the controller to communicate 1 of 4 different protocols:

• BACnet MS/TP

• Modbus

• N2

• LonWorks

The default setting is BACnet MS/TP. Switch 3 ( (

) and

) set the board’s network address. See table below for specific switch settings. The third

party connects to the controller through port

) on the board sets protocol and baud rate. Switches

for BACnet MS/TP, Modbus, and N2, and through

LonWorks Option Card.

• Changing protocol requires no programming or point assignment by the installer or operator.

• Power must be cycled after changing the

Card to

Master Unused Off Off Off On Off Select Baud Select Baud

) -

) settings or connecting the LonWorks Option

(Default)

Slave Unused Off Off On On Off Select Baud Select Baud

Slave Unused Off Off Off On On Off Off

Unused On On Off On Off Off On

for the

WSHP Open v3 5

(Default) On On

Off Off

On Off

Off On

Installation

Configuring for BACnet MS/TP

off

NOTE

MSB (SW1

LSB (SW2

MSB (SW1

LSB (SW2

NOTE

EXAMPLE

MSB (SW1

LSB (SW2

SW3

DS1

DS2

NOTE

Baud Selection Table

Baud Rate

SW3/DS2

SW3/DS1

9,600

19,200

38,400

76,800

SW3

DS3

DS6

DS7

DS8

SW3 Protocol Switch Settings for MS/TP

DS8 DS7 DS6 DS5 DS4 DS3

Refer to Appendix B for the Protocol Implementation Conformance Statement, or download the latest from BACnet International http://www.bacnetinternational.net/catalog/index.php?m=28.

1 Turn

2 Using the rotary switches

3 Set the

the WSHP Open's power.

Changes made to the switches when the controller is on will not take effect until the power is cycled!

Set the Valid addresses are 01-99.

The rotary switches also determine the BACnet device instance of the controller on the BACnet network. The BACnet device instance is automatically generated based on the scheme 16101xx, where “16” is the BACnet vendor ID for Carrier Corporation, and xx equals the rotary switch address.

and the arrow on the generated as 1610101.

19.2k, 38.4k, or 76.8k bps).

WSHP Open is fixed at 8 data bits, No Parity, and 1 Stop bit for this protocol's communications.

To set the controller’s MS/TP MAC address to 01, point the arrow on the

Use the same baud rate and communication settings for all controllers on the network segment. The

) switch to the tens digit of the address, and set the

Comm Selector DIP switches

) and

) switch to 1. Internally, the BACnet device instance is automatically

), set a unique MS/TP MAC address for the WSHP Open.

and

for the appropriate communications speed (9600,

) switch to the ones digit.

) switch to 0

Off Off

On Off

Off On

On On

4 Set 5 Leave

Comm Selector DIP switches

and

in the OFF position. These switches are not applicable to MS/TP.

Off Off Off Off On Off

through

for BACnet MS/TP. See table and example below.

6 WSHP Open v3

J19

Net+, Net-

SHLD

Wire specifications

NOTE

Configuring for Modbus RTU

off

NOTE

MSB (SW1

LSB (SW2

EXAMPLE

MSB (SW1

LSB (SW2

The following example shows the DIP switches set for 76.8k (Carrier default), and MS/TP.

6 Connect the MS/TP network to the controller's

○ A dedicated 22 AWG shielded twisted pair wire (EIA 485) ○ Maximum wire length 2000 feet (610 meters) or 32 nodes ○ Devices should be daisy-chained and not star-wired ○ Attach the drain/shield wire to both ends of the network segment and through every controller

Use the same polarity throughout the network segment.

7 Turn

the WSHP Open's power.

port. Connect to

, and

Refer to Appendix C (page 33) for the Modbus Protocol Implementation Conformance Statement (PICS).

1 Turn

2 Using the rotary switches, set a unique Modbus slave address for the WSHP Open. Set the

the WSHP Open's power.

Changes made to the switches when the controller is on will not take effect until the power is cycled!

to the tens digit of the address, and set the

) switch to the ones digit. Valid Modbus slave

) switch

addresses are 01-99.

and the arrow on the

To set the controller's Modbus slave address to 01, point the arrow on the

) switch to 1.

) switch to 0

WSHP Open v3 7

Installation

SW3

DS1

DS2

NOTE

Baud Selection Table

Baud Rate

SW3/DS2

SW3/DS1

9,600

19,200

38,400

76,800

SW3

DS3

DS6

DS7

DS8

SW3 Protocol Switch Settings for Modbus

DS8 DS7 DS6 DS5 DS4 DS3

J19

Net+, Net-

SHLD

Wire specifications

NOTE

3 Set the

Comm Selector DIP switches

and

for the appropriate communications speed (9600,

19.2k, 38.4k, or 76.8k bps).

Use the same baud rate and communication settings for all controllers on the network segment. The

WSHP Open is fixed at 8 data bits, No Parity, and 1 Stop bit for this protocol's communications.

Off Off

On Off

Off On

On On

through

for Modbus. See example below.

4 Set 5 Leave

Comm Selector DIP switches

and

in the OFF position. These switches are not applicable to Modbus.

Off Off Off On On Off

The following example shows the DIP switches set for 9600 baud and Modbus.

6 Connect the Modbus EIA-485 network to the WSHP Open's

port. Connect to

, and

Use the same polarity throughout the network segment.

7 Turn

8 WSHP Open v3

the WSHP Open's power.

Configuring for N2

off

NOTE

MSB (SW1

LSB (SW2

EXAMPLE

MSB (SW1

LSB (SW1

DS1

DS2

NOTE

SW3

DS3

DS6

DS7

DS8

SW3 Protocol Switch Settings for N2

DS8 DS7 DS6 DS5 DS4 DS3

J19

Net+, Net-

SHLD

Refer to Appendix D (page 35) for the N2 Protocol Implementation Conformance Statement (PICS).

1 Turn

2 Using the rotary switches, set a unique N2 slave address for the WSHP Open. Set the

the tens digit of the address, and set the 01-99.

the

3 Set the Comm Selector DIP switches

TheWSHP Open is fixed at 9600 baud, 8 data bits, No Parity, and 1 Stop bit.

4 Set 5 Leave

the WSHP Open's power.

Changes made to the switches when the controller is on will not take effect until the power is cycled!

) switch to the ones digit. Valid N2 slave addresses are

To set the N2 slave address to 01, point the arrow on the

) switch to 1.

) switch to 0 and the arrow on

) switch to

and

for the 9600 baud.

Use the same baud rate and communication settings for all controllers on the network segment.

Comm Selector DIP switches

and

in the OFF position. These switches are not applicable to N2.

through

for N2. See example below.

Off Off Off Off On On

The following example shows the DIP switches set for 9600 baud and N2.

6 Connect the N2 EIA-485 network to the controller's

port. Connect to

, and

WSHP Open v3 9

Installation

Wire specifications

NOTE

LonWorks

7 Turn

When you handle the LonWorks Option Card:

• Do not contaminate the printed circuit board with fingerprints, moisture, or any foreign material.

• Do not touch components or leads.

• Handle the board by its edges.

• Isolate from high voltage or electrostatic discharge.

• Ensure that you are properly grounded.

Use the same polarity throughout the network segment.

the WSHP Open's power.

Refer to Appendix E for the LonWorks Protocol Implementation Conformance Statement (PICS).

10 WSHP Open v3

off

NOTES

DS1

DS2

SW3

DS3

DS6

SW3

DS7

SW3

DS8

SW3

SW3 Protocol Switch Settings for LonWorks

DS8 DS7 DS6 DS5 DS4 DS3

J15

CAUTION!

OFF

Configuring for LonWorks Option Card (Part #LON-OC)

1 Turn

the WSHP Open's power.

○ Changes made to the switches when the controller is on will not take effect until the power has been

cycled!

○ The controller’s rotary address switches are not used when the LON-OC is installed. That’s because each

LON-OC has a 48-bit Neuron ID that makes it unique on the LonWorks network.

2 Set the Comm Selector DIP switches

and

for 38.4k Communications speed. This is the

speed at which the LON-OC speaks to the WSHP Open. It is fixed at 38.4k.

3 Set the Comm Selector DIP switches 4 Set the Comm Selector DIP switch 5 Leave Comm Selector DIP switch

through

for LonWorks. See example below.

to the ON position to enable the LON-OC.

in the OFF position since it is not used.

Off On On Off On Off

The following example shows the DIP switches set for 38.4k baud and the LON-OC enabled.

6 Plug the LON-OC's ribbon cable into Comm Option Port

The controller must be

before being connected.

on the controller. See illustration below.

WSHP Open v3 11

Installation

Net

NOTE

Net

polarity insensitive

NOTE

Browse

Start-up

This interface...

Provides a...

Virtual BACview

BACview6 Handheld

BACview6

7 Connect the LonWorks network to the LON-OC via the 2-pin

type is

8 Turn

The 2-pin

the WSHP Open's power.

port provides TP/FT-10 channel compatibility. The TP/FT-10 or "Free Topology" network

. Use 24 to 16 AWG twisted pair wire.

port.

9 Commission the controller for LonWorks communication. See instructions below.

Commissioning the controller for LonWorks communication

Before a device can communicate on a LonWorks network, it must be commissioned. Commissioning allows the system integrator to associate the device hardware with the LonWorks system’s network layout diagram. This is done using the device’s unique Neuron ID.

A network management tool such as Echelon’s LonMaker is used to commission each device, as well as to assign addressing. Specific instructions regarding the commissioning of LonWorks devices should be obtained from documentation supplied with the LonWorks Network Management Tool.

When a new device is first commissioned onto the LonWorks network, the system integrator must upload the device’s External Interface File (XIF) information. LonWorks uses the XIF to determine the points (network variables) that are available from a device. The WSHP Open has a set of predefined network variables. These variables can be bound or accessed by the network management tool.

Contact your local Carrier representative for a copy of the .XIF file.

The

feature of the Network Management Tool allows you to read real-time values from the WSHP Open. The Network Management Tool allows you to test integration prior to binding the controller's network variables to other LonWorks nodes.

To start up the WSHP Open, you need one of the following user interfaces to the controller. These items let you access the controller information, read sensor values, and test the controller.

runs on a laptop connected to controller's Local Access port

connects to controller's Local Access port

connected to controller's Rnet port

application -

keypad/display device -

keypad/display device

1, 2

Temporary interface

1, 2

Permanent interface

Requires a USB Link (USB-L). See the BACview Installation and User Guide for instructions on connecting and using the above items.

12 WSHP Open v3

Sequence of Operation

Scheduling

Occupied

Enables/Disables

BAS On/Off

Occupancy Schedules

Enables/Disables

BAS On/Off

Configuration

Unit Configuration

Occupancy Schedules

Enable

Disable

NOTE

Enable

Schedule_Schedule

Configuration

Schedule

schedule_schedule

Weekly

Exception

The multi-protocol WSHP Open controls mechanical cooling, heating, and waterside economizer outputs, based on its own space temperature input and setpoints. An optional CO the space maximizes the occupant's comfort. The WSHP Open has its own hardware clock that is automatically set when you download the heat pump software to the board.

See Scheduling (page 13) for occupancy types.

The following sections describe the multi-protocol controller's functions. All point objects mentioned in this sequence of operation reference the BACview application are the same or similar.

Scheduling

The time periods control the space temperature to occupied heating and cooling setpoints. The WSHP Open operates continuously in the system operate properly.

You can change the occupancy source to one of the following:

BACview can disable this by going to

a time schedule to the controller.

is accessible via the BACview consists of a start and stop time (standard or 24-hour mode) and 7 days of the week, starting with Monday and ending on Sunday. To enter a daily schedule, navigate to Password (1111) >

IAQ (Indoor Air Quality) sensor that is mounted in

Handheld interface. Points in Field Assistant and the i-Vu®

- You must configure time periods to schedule the transitions from occupied to unoccupied operation.

the

mode until you configure either a time schedule or a third party control

point. You must set your local time and date for these functions to

- The controller is occupied 24/7 until you configure a time schedule using either the

device, Field Assistant, the i-Vu application, or a third party

You must

and clicking OK.

this point in order for the BACview6 device, Field Assistant, or the i-Vu application to assign

the

, changing the point from

- The unit operates according to the schedule configured and stored in the unit. The schedule

Handheld device, the i-Vu application, or Field Assistant. The daily schedule

and then enter either a

, enter BACview6 Admin

schedule for the unit.

point. You

WSHP Open v3 13

Installation

Important note for the following:

Occupancy Input Contact (Option)

Occupancy

Schedules

Occ Override Delay

BAS (Building Automation System) On/Off

Occupancy Schedules

Global Occupancy Scheduling

Occupancy Schedules

BACnet Network Occupancy Input

Occupancy Schedules

Normally Closed

Active

Inactive

Fan Modes

Auto

Continuous

Always on

Continuous

an external dry contact closure to determine the occupancy status of the unit. You must disable the

in order to utilize the occupancy contact input. The unit enters an occupied mode whenever it senses the abnormal input. After the input returns to its normal state, the unit stays in the occupied mode for the configured

scheduling, you must disable the communication and the BAS scheduling function.

of WSHP's can be controlled from a single occupancy schedule. The local in order to utilize the global occupancy input.

occupancy control. This function is only compatible with units used in BACnet systems. You need to configure the System Occupancy BACnet network input point to locate the device and point name where the external occupancy point information resides. You must also disable

Fire/Smoke detector input

The WSHP Open can read the status of a normally closed FSD contact input to determine if a fire or smoke detector alarm is present. If the controller determines an alarm condition is present, all heating, cooling, and the fan are disabled. The switch is factory-set to

Scheduling can only be controlled from one source.

- If configured for remote occupancy control (default), the WSHP Open can use

period (15 minutes default).

- For use with a Building Automation System that supports network so the BAS system can control the unit through a network

- The WSHP Open can read the occupancy status from another unit so that a group must be disabled

- The WSHP Open can accept an external BACnet Binary Network Input for

and cannot be changed.

in order to utilize this input.

Shutdown input

The WSHP Open controller has a shutdown input (software point) which, when set to its WSHP to safely shutdown in a controlled fashion. Heating and cooling is disabled after any minimum runtime conditions expire and the fan is disabled after the fan-off timer expires. All alarms are reset but any active alarm remains active. After the shutdown input transitions from the configured power fail restart delay expires.

Indoor fan

You can configure the indoor fan to operate in any one of 3

•

periods

•

In the

• It is in occupied mode, which is determined by the occupancy status

• There is a demand for cooling or heating in the unoccupied mode

• There is a call for dehumidification (optional)

mode causes the

mode to

, the WSHP Open restarts after

- intermittent operation during both occupied and unoccupied periods

(default) - intermittent operation during unoccupied periods and continuous during occupied

- operates the fan continuously during both occupied and unoccupied periods

default mode, the fan is turned on whenever any one of the following is true:

14 WSHP Open v3

Fan On Delay

Fan Off Delay

NOTE

Automatic Fan Speed Control

Supply Air Temperature

Fan Speed Control

During heating

Maximum Heating SAT Limit

During cooling

Minimum Cooling SAT Limit

Fan Status

NOTE

Cooling

Enable

Fire/Smoke Input

Shutdown

Heat

Condensate Overflow

Normal

Fan Status

True

When power is reapplied after a power outage, there is a configurable delay of 5 - 600 seconds (default 60) before starting the fan. You must configure the fan delay:

• The

defines the delay time (0 - 30 seconds, default 10) before the fan begins to operate after

heating or cooling is started.

• The

defines the delay time (0 - 180 seconds, default 45) the fan continues to operate after

heating or cooling is stopped.

The fan continues to run as long as the compressors, heating stages, or the dehumidification relays are on. If the SPT failure alarm or condensate overflow alarm is active, the fan is shutdown immediately, regardless of occupancy state or demand.

- The WSHP Open can control up to 3 fan speeds using the ECM (Electronically Commutated Motor). The motor operates at the lowest speed possible to provide quiet and efficient fan operation with the best latent capability. The motor increases speed if additional cooling or heating is required to reach the desired space temperature setpoint. The control increases the motor’s speed as the space temperature rises above the cooling or below the heating setpoint. The amount of space temperature increase above or below the setpoint required to increase the fan speed is configurable in the setpoint. Also, the control increases the fan speed as the

•

temperature to verify it does not rise above the configured

approaches the configured minimum or maximum limits.

– Whenever heat is required and active, the control continuously monitors the supply air

(110° default). As the SAT approaches this value, the control increases the fan speed as required to ensure the SAT remains within the limit. This provides the most quiet and efficient operation by running the fan at the lowest speed possible.

•

supply air temperature to verify it does not fall below the configured

– Whenever mechanical cooling is required and active, the control continuously monitors the

(50° default). As the SAT approaches this value, the control increases the fan speed as required to ensure the SAT will remain within the limit. Fan operates at the lowest speed during dehumidification to maximize latent capacity during cooling.

- You can configure an optional input as either an occupancy input contact or a fan status input. If configured as fan status, the controller compares the status of the fan to the desired commanded state. Whenever the fan is commanded to run (ON), the fan status is checked and verified to match the commanded state. If the fan status is not on, then a fan status alarm is generated after 1 minute and the equipment’s compressor(s) and auxiliary heat is disabled and the optional OA damper closes.

Cooling

The WSHP Open operates 1 or 2 stages of compression to maintain the desired cooling setpoint. The compressor outputs are controlled by the PI (Proportional-integral) cooling loop and cooling stages capacity algorithm. The algorithm calculates the desired number of stages needed to satisfy the space by comparing the space temperature (SPT) to the appropriate cooling setpoint.

The waterside economizer, if applicable, is used for 1st stage cooling, in addition to the compressor(s).

The following conditions must be true for the cooling algorithm to run:

•

is set to

• The

•

mode is not active and the compressor time guard(s) have expired

• If occupied, the SPT is greater than the occupied cooling setpoint

WSHP Open v3 15

and

input in

(if option is enabled)

modes are inactive

Installation

Cooling Lockout Temperature

Condenser Water Pump

Condensor Water Linkage

Cooling

Min SAT

Cooling Lockout

Heating

Enable

Fire/Smoke Input

Shutdown

Cool

Condensate Overflow

Normal

Fan Status

True

Space Temperature

OAT

Heating Lockout Temperature

Condenser Water Pump

Condensor Water Linkage

• Space temperature reading is valid

• If unoccupied, the SPT is greater then the unoccupied cooling setpoint

• If economizer cooling is available and active, and the economizer alone is insufficient to provide enough

cooling

• OAT >

•

is on (if

if OAT is available

active)

If all of the above conditions are met, the compressors' relays are energized as required. Otherwise, they will be de-energized. If cooling is active and if the SAT approaches the minimum SAT limit, the fan will be indexed to the next higher speed. If this is insufficient, and if the SAT falls further (equal to the minimum SAT limit), the fan will be indexed to the maximum speed. If the SAT still continues to falls 5° F below the minimum SAT limit, all cooling stages will be disabled.

During

, the reversing valve output is held in the cooling position (either B or O type, as configured), even

after the compressor is stopped. The valve does not switch position until the heating mode is required.

The configuration screens contain the

parameter as well as

based on outdoor air

temperature (OAT). Both can be adjusted to meet various specifications.

There is a 5-minute off-time for the compressor, as well as a 5-minute time delay, when staging up to allow the SAT to achieve a stable temperature, before energizing a second stage of capacity. Likewise, there is a 45-second delay when staging down.

After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if the supply air temperature has increased above the minimum supply air temperature limit.

The WSHP Open provides a status input to monitor the compressor operation. The status is monitored to determine if the compressor status matches the commanded state. This input is used to determine if a refrigerant safety switch or other safety device has tripped and caused the compressor to stop operating normally. If this occurs, an alarm is generated to indicate the faulted compressor condition.

Reverse cycle heating

The WSHP Open operates 1 or 2 stages of compression to maintain the desired cooling setpoint. The compressor outputs are controlled by the heating PI (Proportional-integral) loop and heating stages capacity algorithm. The algorithm calculates the desired number of stages needed to satisfy the space by comparing the space temperature (SPT) to the appropriate heating setpoint.

The following conditions must be true for the heating algorithm to run:

•

• The

•

• If occupied, the SPT is less than the occupied heating setpoint

•

• If unoccupied, the SPT is less then the unoccupied heating setpoint

•

is set to

mode is not active and the compressor time guard has expired

and

input in

(if option is enabled)

reading is valid

is on (if

modes are inactive

if OAT is available

active)

16 WSHP Open v3

Maximum Heating SAT

Heating

Max SAT

Maximum Heating SAT

Reverse Cycle Heating

Auxiliary Heat

Auxiliary Modulating Hot Water / Steam Heating Reheat -

Maximum Heating SAT

2- Position Hot Water / Steam Heating Reheat -

Maximum Heating SAT

Single Stage Electric Auxiliary Heat

Maximum

Heating SAT

If all the above conditions are met, the heating outputs are energized as required, otherwise they are deenergized. If the heating is active and the SAT approaches the maximum SAT limit, the fan is indexed to the next higher speed. If this is insufficient, and if the SAT rises further and reaches the

limit, the fan is indexed to the maximum speed. If the SAT still continues to rise 5° F above the maximum limit, all heating stages are disabled.

During

, the reversing valve output is held in the heating position (either B or O-type, as configured), even

after the compressor is stopped. The valve does not switch position until the cooling mode is required.

The configuration screens contain the

parameter as well as heating lockout based on outdoor air

temperature (OAT). Both can be adjusted to meet various specifications.

There is a 5-minute off-time for the compressor, as well as a 5-minute time delay, when staging up to allow the SAT to achieve a stable temperature before energizing a second stage of capacity. Likewise, a 45 second delay is used when staging down.

After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if the supply air temperature has fallen below the maximum supply air temperature limit.

Auxiliary heat

The WSHP Open can control a 2-position or modulating water or steam valve, connected to a coil on the discharge side of the unit and supplied by a boiler, or a single stage ducted electric heater, in order to maintain the desired heating setpoint. If the compressor capacity is insufficient, or a compressor failure occurs, the auxiliary heat is used. Unless the compressor fails, the auxiliary heat only operates to supplement the heat provided by the compressor, if the space temperature falls more than 1° F below the desired heating setpoint. (This amount is configurable.) The heat is controlled so the SAT does not exceed the

The same conditions required for run.

connected to a coil on the discharge side of the unit, and supplied by a boiler in order to maintain the desired heating setpoint, if the compressor capacity is insufficient, or a compressor failure occurs. Unless a compressor fault condition exists, the valve only operates to supplement the heat provided by the compressor if the space temperature falls more than 1° F below the desired heating setpoint. The valve is controlled so the SAT does not exceed the

steam valve, connected to a coil on the discharge side of the unit and supplied by a boiler, in order to maintain the desired heating setpoint, if the compressor capacity is insufficient or a compressor failure occurs. Unless a compressor fault condition exists, the valve only opens to supplement the heat provided by the compressor, if the space temperature falls more than 1° F below the desired heating setpoint. The valve is controlled so the SAT does not exceed the excessive valve cycling.

installed on the discharge side of the unit, in order to maintain the desired heating setpoint, if the compressor capacity is insufficient or a compressor failure occurs. Unless a compressor fault condition exists, the heat stage only operates to supplement the heat provided by the compressor if the space temperature falls more than 1° F below the desired heating setpoint. The heat stage is controlled so the SAT does not exceed the

must be true in order for the

The control can modulate a hot water or steam valve

limit.

The control can operate a 2-position, NO or NC, hot water or

limit and is subject to a 2-minute minimum OFF-time to prevent

– The control can operate a field-installed single stage of electric heat that is

limit and is subject to a 2-minute minimum OFF-time to prevent excessive cycling.

limit.

algorithm to

WSHP Open v3 17

Installation

System Space AQ

Configuration

Damper Control

DCV

Fire/Smoke Input

Shutdown

Fan Status

True

DCV Start CTRL Setpoint

DCV Start Ctrl Setpoint

DCV Max Ctrl Setpoint

Minimum Dmpr Pos

DCV Max Vent Damper Pos

NOTE

Continuous

Always On

2-position OA Damper

System Space RH

NOTE

Indoor air quality (IAQ) and demand control ventilation (DCV)

If the optional indoor air quality sensor is installed, or the

network input point is used, the WSHP Open maintains indoor air quality with a modulating OA damper, which provides demand-controlled ventilation. The control operates the modulating OA damper during occupied periods, monitors the CO2 level, compares it to the configured setpoints, and adjusts the ventilation rate, as required. The control provides proportional ventilation to meet the requirements of ASHRAE specifications by providing a base ventilation rate and then increasing the rate as the CO2 level increases. The control proportionally increases ventilation when the CO2 level rises above the start ventilation setpoint and reaches the full ventilation rate when the CO2 level is at or above the maximum setpoint. You can configure a minimum damper position to ensure that proper base ventilation is delivered when occupants are not present. Access the IAQ configurations through the screen.

The following conditions must be true in order for this algorithm to run:

•

• The

•

is configured for

and

(if option is enabled)

modes are inactive

• The unit is in an occupied mode

• IAQ sensor reading is greater than the

The control has the following 4 adjustable setpoints:

•

In order for the damper to maintain proper base ventilation, you must configure the fan as

ventilation mode to provide the minimum ventilation requirements during occupied periods.

Dehumidification

The WSHP Open provides occupied and unoccupied dehumidification only on units that are equipped with the modulating hot water reheat option (HWR). This function requires an accessory space relative humidity sensor. When using a relative humidity sensor to control dehumidification during occupied or unoccupied times, the dehumidification setpoints are used accordingly. Also, you may use the network input point place of the hard-wired RH sensor.

When the indoor relative humidity becomes greater then the dehumidification setpoint, a dehumidification demand is acknowledged. Once acknowledged, the dehumidification output is energized, bringing on the supply fan (medium speed), mechanical cooling, and the integral hot water reheat coil. The controls engage cooling mode and the waste heat from the compressor cooling cycle is returned to the reheat coil simultaneously, meaning that the reversing valve causes the compressor to operate in the cooling mode.

During cooling mode, the unit cools and dehumidifies, and disables the HWR coil. However, once the call for cooling has been satisfied and there is still a call for dehumidification, the unit continues to operate in the reheat mode and HWR coil.

- You can configure the control to operate as a ventilation damper in a 2-position

18 WSHP Open v3

Properties

Equipment

Status

Modulating water/2-Position water economizer control -

Cooling

Supply Air Temperature

Minimum Cooling SAT

HOME

CONFIG > UNIT

Heating

Maximum Heating SAT

2-position water economizer control -

Cooling

Minimum

Cooling SAT

Heating

Maximum Heating SAT

Waterside economizer

The WSHP Open can provide modulating, or 2-position water economizer operation (for a field-installed economizer coil mounted to the entering return air side of the unit and connected to the condenser water loop), in order to provide free cooling or preheating, when water conditions are optimal. Water economizer settings can be accessed on

The following conditions must be true for economizer operation:

• SAT reading is available

• EWT reading is available

• If occupied, the SPT is greater than the occupied cooling setpoint or less than the occupied heating setpoint

and the condenser water is suitable

• Space temperature reading is valid

• If unoccupied, the SPT is greater than the unoccupied cooling setpoint, or less than the unoccupied heating

setpoint, and the condenser water is suitable

flowing through a coil on the entering air side of the unit

•

temperature is at least 5°F below space temperature. If the water loop conditions are suitable, the valve modulates open to maintain a capacity alone is insufficient for a period greater than 5 minutes, or if a high humidity condition occurs, then the compressor starts, in order to satisfy the load. If the SAT approaches the (

•

is suitable for heating (at least 5°F above space temperature) and heat is required. The valve is controlled in a similar manner, except to satisfy the heating requirement. If the coil capacity alone is insufficient to satisfy the space load conditions for more than 5 minutes, then the compressor starts in order to satisfy the load. If the SAT approaches the compressor operation.

condenser water flow through a coil on the entering air side of the unit.

•

when the entering water loop temperature is at least 5° F below space temperature. If the optional coil is provided and the water loop conditions are suitable, then the valve opens to provide cooling to the space, when required. If the capacity is insufficient for a period greater than 5 minutes, or if a high humidity condition occurs, the compressor is started in order to satisfy the load. If the SAT reaches the

•

suitable for heating (at least 5° F above space temperature) and heat is required. The valve is controlled in a similar manner, except to satisfy the heating requirement. If the coil capacity is insufficient to satisfy the space load for more than 5 minutes, then the compressor is started to satisfy the load. If the SAT reaches the

modulates a water valve to control condenser water

- Provides an economizer cooling function by using the water loop when the entering water loop

), the economizer valve modulates closed during compressor operation.

that meets the load conditions. If the economizer coil

limit

- In addition, the control modulates the water valve if the entering condenser water loop temperature

limit, the economizer valve modulates closed during

has the capability to control a NO or NC, 2-position water valve to control

- The purpose is to provide a cooling economizer function directly from the condenser water loop

limit, the economizer valve closes during compressor operation.

- In addition, the economizer control opens the water valve, if the entering water loop temperature is

limit, the economizer valve closes during compressor operation.

WSHP Open v3 19

Installation

Fire/Smoke Detector Alarm

Space Temperature Alarms

Condenser Water Temperature Alarm

Supply Air Temperature Alarm

High Condensate/Overflow Alarm

Condensate Overflow Alarm

Delay

Fan Status Alarm

Compressor Status Alarm

Demand limiting

The WSHP Open can accept 3 levels of demand limit from the BACnet network. In response to a demand limit, the unit decreases its heating setpoint and increases its cooling setpoint to widen the range, in order to immediately lower the electrical demand. You can configure the temperature adjustment for both heating and cooling and for each demand level. You can also set the response to a particular demand level to 0.

Power failure restart delay

The control provides a delay when recovering from a power failure, a shutdown mode, or when transitioning from unoccupied to occupied mode, in order to prevent excessive demand when many units start simultaneously. Each unit can be configured for a unique delay between 0 and 600 seconds. The factory-programmed default delay is 60 seconds.

Alarms

– The control monitors the voltage input to J1-9 to detect if a smoke detector or fire detector NC contact has opened, indicating an alarm condition. The control verifies the presence of 24 Vac on this input. If the input opens at any time, an alarm is generated after 3 seconds and the equipment (fan, compressor, aux heat, and damper) immediately shuts down.

– The control provides the ability to generate an alarm whenever the space temperature exceeds the alarm setpoint. A separate occupied hysteresis and fixed unoccupied high and low alarm setpoints are provided. The control provides a 5-minute alarm delay during unoccupied periods. During occupied periods, the control uses the occupied temperature setpoint and applies the hysteresis value to determine the alarm setpoints. Whenever occupancy transitions from unoccupied to occupied or the occupied temperature setpoints are changed, causing an alarm condition to occur, the control automatically calculates an alarm delay (equivalent to the configured delay time in minutes/ ° F, multiplied by the temperature error, + 15 minutes). This prevents nuisance alarms whenever an occupancy change occurs and allows time for the unit to correct an alarming temperature condition.

– The control has 4 configurable alarm limits for condenser water temperature. The control verifies that the water temperature is within operating range (between high and low limits) for the specific operating mode (heating or cooling) before energizing the compressor. Once the compressor is started, the condenser water temperature is further monitored to verify that it is within limits to insure sufficient water is flowing through the coil. If the leaving water temperature rises above or falls below the appropriate limits, and lasts for more than 15 seconds, an alarm is generated and the compressor shuts down.

– The control has 2 configurable alarm limits for supply air temperature. The control verifies that the supply air temperature is within operating range (between high and low limits) whenever the compressor or auxiliary heat is operating. If the air temperature rises above or falls below the appropriate limits, and this lasts for more than 5 minutes, an alarm is generated.

– The control monitors a discrete input to determine the state of a condensate level switch. You can configure the input to alarm on either an open or closed switch condition. If this input is in an alarm state, the control starts a timer, and after the timer exceeds a configurable

limit (10-second default), the control generates an alarm and the unit disables the compressor and fan

outputs.

(optional) – The control generates a fan status alarm if the fan status input detects the fan is OFF after any fan speed output has been enabled. A 30-second alarm delay is used to allow the fan to start operation before an alarm condition is detected. The control monitors the fan output and if the fan is operating at any speed, the fan status must detect the fan is operating.

– The control generates a compressor failure alarm if the compressor status input detects the compressor is OFF after the compressor output has been energized. A 6-minute alarm delay is used to allow the compressor to start (prevents alarms due to timeguard operation) before an alarm condition is detected. The control monitors the compressor output and if the compressor output is energized, the compressor status input must detect the compressor operation.

20 WSHP Open v3

Filter Status Alarm

Reset Filter Alarm

Filter Alarm Timer Delay

Indoor Air Quality Alarm

Occupied High IAQ Alarm Limit

Relative Humidity Alarm

Condenser Water Linkage Failure Alarm

Condenser Water Linkage

NOTE

Shutdown

Active

Airside Linkage Failure Alarm

Airside Linkage

NOTE

Shutdown

Active

OAT Sensor Alarm

Network OA Temperature

NOTE

Shutdown

Active

SPT Sensor Alarm

– The control provides the ability to generate a dirty filter alarm after the number of fan run hours exceeds a configurable filter alarm timer limit. The control monitors the fan output and if the fan is operating at any speed, it accumulates run time. If the fan run time hours exceed the configurable limit, an alarm is generated. To reset the alarm timer after the alarm has been generated, a You can disable the filter alarm by setting the

periods whenever the CO

– The control provides the ability to generate a high CO2 level alarm during occupied

sensor value exceeds the adjustable limit. Whenever a transition from unoccupied to

to 0 (factory default).

input is provided.

occupied occurs, or the occupied alarm limit is changed to a value that causes an alarm condition to occur, the control will automatically calculate an alarm delay (equivalent to the configured delay time in minutes/ppm, times the error that occurred, + 15 minutes). This prevents nuisance alarms from occurring when occupancy changes or the setpoint is changed. You can disable the IAQ alarm by setting

– The control provides the ability to generate an alarm whenever the space relative

to 0.

humidity exceeds the alarm setpoint. Separate occupied and unoccupied high humidity alarm setpoints are provided. The control provides a 5-minute alarm delay during unoccupied periods. During occupied periods, the controller uses the occupied high RH alarm limit. Whenever an occupancy transition from unoccupied to occupied occurs, or the occupied high alarm limit is lowered, causing an alarm condition to occur, the control automatically calculates an alarm delay (equivalent to the configured delay time in minutes/% RH, times the humidity error condition that occurred, + 15 minutes). This prevents nuisance alarms whenever an occupancy change occurs and allows time for the unit to correct an alarming humidity condition.

failure alarm if Linkage fails after once being active. The Linkage status is monitored

and if it fails to be updated from the Loop controller, then a

(if

was active) – The control generates a

alarm is generated. There

is a 6-minute alarm delay to prevent false alarms.

You can reset this alarm only by re-establishing Linkage and correcting the condition that caused the

Linkage failure, or by momentarily setting the

(if

point to

was active) – The control generates an

failure alarm if Linkage fails after once being active. The Linkage status is monitored and if it fails to be updated from the master zone controller, then an

alarm is generated. There is a 6-minute alarm delay to prevent

false alarms.

You can reset this alarm only by re-establishing Linkage and correcting the condition that caused the

Linkage failure, or by momentarily setting the

(if

point to

was active) – The control generates an OAT Sensor failure alarm if the value of OAT fails to be updated through the network after once being active. The update status is monitored and if it fails to be updated, then an OAT sensor alarm is generated. There is an alarm delay (approximately 1 hour) to prevent false alarms, while minimizing the required update rate for OAT.

You can reset this alarm by momentarily setting the

(if SPT sensor was active)– The control generates an SPT sensor failure alarm if the SPT sensor

point to

fails to communicate with the control for 5 minutes or greater. The update status is monitored and if it fails to be updated, then an SPT sensor alarm is generated.

WSHP Open v3 21

Troubleshooting

LED's

If this LED is on...

Status is...

Power

BO#

NOTE

Run

Error

If Run LED shows...

And Error LED shows...

Status is..

Run

7 flashes per second, alternating with

Run

Ten second recovery period after

Troubleshooting

The WSHP Open controller acts as an intelligent embedded thermostat to the water source heat pump, but can be monitored and controlled from a third party network.

The 3 distinct components for troubleshooting are:

• The WSHP Open controller

• The mechanical systems of the WSHP unit

• The third party connected network

First, you must determine which component needs troubleshooting.

The WSHP Open controller can troubleshoot itself with Service Test, communicating LED’s, and built-in alarms, which are discussed in the unit's Controls and Troubleshooting instructions. Disconnecting the WSHP Open from the unit control inputs can be valuable in determining whether the problem is related to the unit/equipment, the controller/equipment, or the controller/network. When disconnected from the unit control inputs, you can use simple 24V signals to activate G, Y1, Y2, W1, W2, etc. to verify proper unit operation. If the problem occurs without the WSHP Open connected, then you should begin troubleshooting the unit/equipment rather than the WSHP Open or network.

The LED’s indicate if the controller is speaking to the other devices on the network. The LED’s should reflect communication traffic based on the baud rate set. The higher the baud rate, the more solid the LED’s will appear.

The LED's on the WSHP Open show the status of certain functions.

If Tx is not lit, the MS/TP token is not being passed between controllers.

The WSHP Open has power

The WSHP Open is receiving data from the network segment

The WSHP Open is transmitting data over the network segment

The binary output is active

The

and

LED's indicate controller and network status.

2 flashes per second Off Normal 2 flashes per second

2 flashes per second 3 flashes, then off Controller has just been formatted 2 flashes per second On

2 flashes per second On

5 flashes per second Off

7 flashes per second

2 flashes, alternating with

LED

Five minute auto-restart delay after system error

Two or more devices on this network have the same network address

Firmware halted after frequent system errors or control programs halted

Firmware transfer in progress, Boot is running

brownout

22 WSHP Open v3

Run

BACnet MS/TP

Check the following to troubleshoot your WSHP Open:

DS3 - DS6

Network Communications

Max Masters

14 flashes per second

On On Failure. Try the following solutions:

1 Verify that the BAS and controller are both set to speak the BACnet MS/TP protocol on the Comm Selector

DIP switches

2 Verify that the BAS and the controller are both set for the same baud rate:

• Baud rate DIP switches DS2 and DS1

○ Obtain a Modstat of the controller through the BACview device. Click and hold the

the same time. Scroll to the bottom of the page to and baud rate.

1 Verify that the BAS is configured to speak 2-wire EIA-485 to the controller. The BAS may have to configure

jumper or DIP switches on their end.

2 Verify that the BAS and the controller have the same communication settings (8 data bits, No Parity, and 1

stop bit).

3 Verify proper connection wiring between the BAS and the controller. 4 Verify that the controller has a unique MAC address on the MS/TP bus. The controller’s MS/TP MAC address

is set by its rotary address switches.

5 Verify that the BAS is reading or writing to the proper BACnet objects in the controller. Refer to Appendix A for

the points list for the controller.

6 BAS must be reading or writing to the proper addresses on the controller. Refer to Appendix A (page 28) for

the points list of the controller.

7 Verify that the BAS is sending his requests to the proper MS/TP MAC address of our controller. 8 Present the BAS company with a copy of the controller’s BACnet PICS so that they know which BACnet

commands are supported. Refer to Appendix B for the BACnet PICS. In certain situations, it may be necessary to adjust the MS/TP Protocol timing settings through the BACview

14 flashes per second, alternating with

LED

Brownout

• Turn the WSHP Open off, then

on.

• Replace the WSHP Open.

key and the . key at

device.

to view the active protocol

It may be necessary to adjust the following two MS/TP Protocol timing settings through the BACview device:

For example, if there are 3 master nodes on an MS/TP network, and their MAC addresses are 1, 8, and 16, then Max Masters would be set to 16 (since this is the highest MS/TP MAC address on the network).

This property optimizes MS/TP network communications by preventing token passes and “poll for master” requests to non-existent Master nodes.

WSHP Open v3 23

- defines the highest MS/TP Master MAC address on the MS/TP network.

Troubleshooting

Max Info Frames

NOTES

System Settings

Network

ENTER

Max Masters

Max Info Frames

Max Masters:

ENTER

DECR/INCR

Max Info Frames:

ENTER

DECR/INCR

In the above example, MAC address 16 knows to pass the token back to MAC address 1, instead of counting up to MAC address 127. Each MS/TP master node on the network must have their Max Masters set to this same value. The default is 127.

- defines the maximum number of responses that will be sent when the WSHP Open receives the token. Any positive integer is a valid number. The default is 10 and should be ideal for the majority of applications. In cases where the WSHP Open is the target of many requests, this number could be increased as high as 100 or

200.

• MS/TP networks can be comprised of both master and slave nodes. Valid MAC addresses for master nodes

are 0 – 127 and valid addresses for Slave nodes are 0 - 254.

• If the third party attempts to communicate to the controller but does not get a response, make sure the

controller is set as a BACnet MS/TP (m) master. The BACnet software asks the controllers, “Who Is?” This is to auto-locate devices on the network. Only controllers set as masters will answer this request.

• See Appendix A (page 28) for Points Mapping tables.

• See Appendix B (page 32) for the BACnet Protocol Implementation Conformance Statement (PICS).

Editing MS/TP Properties:

1 From the default screen, press any key to continue. 2 Click the 3 Click 4 Click the 5 Click the down arrow. scroll to the

shown,

If you want to edit

1 Click the 2 Use arrow keys and keypad to either type in a new value (1-127), or click the

decrease/increase the value, respectively.

3 Click

If you want to edit

1 Click the down arrow and then press the 2 Use arrow keys and keypad to either type in a new value (1-999), or hit the

decrease/increase the value, respectively.

3 Click

button and enter a password of 1111.

button to enter edit mode.

to accept the change.

button.

and

button to accept the change.

menu and press the

button to enter edit mode.

button. The BACnet Settings are now

buttons to

24 WSHP Open v3

Modbus

Check the following to troubleshoot your WSHP Open:

DS3 - DS6

Network Communications

NOTE

Modbus Exception Codes that might be returned from this controller

Codes

Name

Description

Johnson N2

Check the following to troubleshoot your WSHP Open:

DS3 -

DS6

Network Communications

1 Verify that the BAS and controller are both set to speak the Modbus RTU protocol on the Comm Selector DIP

switches

2 Verify that the BAS and the controller are both set for the same baud rate:

• Baud rate DIP switches DS2 and DS1

○ Obtain a Modstat of the controller through the BACview device. Click and hold the

the same time. Scroll to the bottom of the page to

key and the . key at

to view the active protocol

and baud rate.

1 Verify that the BAS is configured to speak 2-wire EIA-485 to the controller. The BAS may have to configure

jumper or DIP switches on their end.

2 Verify that the BAS and the controller have the same communication settings (8 data bits, No Parity, and 1

stop bit).

3 Verify proper connection wiring between the BAS and the controller. 4 Verify that the rotary address switches are set for the controller's unique slave address. 5 BAS must be reading or writing to the proper point addresses on the controller. 6 BAS is sending requests to the proper slave address of the controller.

Refer to Appendix C (page 33) for the Protocol Implementation Conformance Statement.

01 Illegal Function The Modbus function code used in the query is not

supported by the controller.

02 Illegal Data

04 Slave Device

1 Verify that the BAS and controller are both set to speak N2 protocol on the Comm Selector DIP switches

2 Verify that the BAS and the controller are both set for the same baud rate:

○ 9600 for N2

• Baud rate DIP switches DS2 and DS1

○ Obtain a Modstat of the controller through the BACview device. Click and hold the

The register address used in the query is not supported

Address

by the controller.

The Modbus Master has attempted to write to a non-

Failure

existent register or a read-only register in the controller.

the same time. Scroll to the bottom of the page to and baud rate.

key and the . key at

to view the active protocol

WSHP Open v3 25

Troubleshooting

NOTE

LonWorks

Check the following to troubleshoot your WSHP Open:

DS3 - DS6

Network Communications

SW3

DS7

Browse

1 Verify that the BAS is configured to speak 2-wire EIA-485 to the controller. The BAS may have to configure

jumper or DIP switches on their end.

2 Verify that the BAS and the controller have the same communication settings (8 data bits, No Parity, and 1

stop bit).

Refer to Appendix D (page 35) for the Protocol Implementation Conformance Statement.

1 Verify that the BAS and controller are both set to speak the LonWorks protocol by theComm Selector DIP

switches

2 Verify that the BAS and the controller are both set for the same baud rate:

○ 38.4k for LonWorks

• Baud rate DIP switches DS2 and DS1

○ Obtain a Modstat of the controller through the BACview device. Click and hold the

the same time. Scroll to the bottom of the page to

key and the . key at

to view the active protocol

and baud rate.

1 BAS must be reading or writing to the proper point addresses on the controller. 2 Verify that the Comm Option Port is enabled on the controller. The Comm Option Port setting must be set via

(switch

). It should be in the ON position to enable LonWorks communication.

3 Verify that controller has been properly commissioned onto the LonWorks network. Commissioning is done

with a network management tool such as LonMaker and allows the system integrator to associate the controller with the LonWorks system’s network layout diagram. This is done using the controller’s unique Neuron ID. The Network Management Tool is also used to upload the controller’s .XIF file to determine the network variables that reside inside of the controller.

4 Use the

feature of the Network Management Tool to verify that you can communicate and get real-

time values from the controller before connecting the BAS.

5 Once you have confirmed communications with the controller using the Network Management Tool, connect

the BAS.

6 Verify that the BAS is connected properly to the LON-OC's 2-wire TP/FT-10 Net port. The LON-OC’s TP/FT-10

port is polarity insensitive. The BAS may have to configure jumper or DIP switches on their end to support TP/FT-10.

26 WSHP Open v3

FCC Compliance

CAUTION

CE Compliance

WARNING

BACnet Compliance

Compliance

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

void the user’s authority to operate the equipment.

Changes or modifications not expressly approved by the responsible party for compliance could

This is a Class A product. In a domestic environment, this product may cause radio interference

in which case the user may be required to take adequate measures.

BACnet® is a registered trademark of ASHRAE. ASHRAE does not endorse, approve or test products for compliance with ASHRAE standards. Compliance of listed products to requirements of ASHRAE Standard 135 is the responsibility of the BACnet manufacturers Association (BMA). BTL

is a registered trademark of the BMA.

WSHP Open v3 27

Appendix A: Network Points List for WSHP Open

28 WSHP Open v3

WSHP Open v3 29

Appendix A: Network Points List for WSHP Open

30 WSHP Open v3

WSHP Open v3 31

Appendix B: BACnet Protocol Implementation Conformance Statement

The PIC statements are updated regularly. Please refer to the BACnet website http://www.bacnetinternational.net/catalog/index.php?m=28 for the latest information.

32 WSHP Open v3

Carrier

WSHP Open

Water Source Heat Pump

Serial Transmission Mode:

Supported?

RTU

Slave only

Communication Types:

Baud rates:

Data Bits:

Parity:

Stop Bits:

Function Codes:

Purpose:

Used with Register Numbers:

01 – Read Coil Status

Read Discrete Outputs

00001 - 09999

16 – Preset Multiple Coils

Write Holding Registers

40001 - 49999

Range:

Function Codes Used with this Register Type:

Appendix C: Modbus Protocol Implementation Conformance Statement

Date: 06/30/2008

Vendor Name:

Product Names:

Product Model Number:

Protocol Description:

The WSHP Open controller speaks the Modicon Modbus RTU/ASCII Protocol as described in the Modicon Modbus Protocol Reference Guide, PI-MBUS-300 Rev.J. Further details on the Modbus implementation are described

below.

Product Description:

The WSHP Open is a factory-installed water source heat pump controller that is capable of speaking multiple protocols.

ASCII Not supported

2-wire EIA-485,

9600, 19200, 38400, 76800

8 None 1

02 – Read Input Status Read Discrete Inputs 10001 - 19999 03 – Read Holding Registers Read Holding Registers 40001 - 49999 04 – Read Input Registers Read Input Registers 30001 - 39999 05 – Force Single Coil Write Discrete Outputs (single) 00001 - 09999 06 – Preset Single Register Write Holding Registers (single) 40001 - 49999 15 – Force Multiple Coils Write Discrete Outputs 00001 - 09999

Float Value (FLOAT)

Unsigned Integer (UINT) 0 - 65535

WSHP Open v3 33

Single-Precision IEEE floating point value

3 – Read Holding Register 6 – Preset Single Register 16 – Preset Multiple Register 3 – Read Holding Register 6 – Preset Single Register 16 – Preset Multiple Register

Appendix C: Modbus Protocol Implementation Conformance Statement

3 – Read Holding Register

Signed Integer (SINT) -32768 - 32767

6 – Preset Single Register 16 – Preset Multiple Register

Discrete Input (DI) 0 = Off, 1 = On 2 – Read Input Status

1 – Read Coil Status

Discrete Output (DO) 0 = Off, 1 = On

5 – Force Single Coil 15 – Force Multiple Coils

34 WSHP Open v3

Carrier

WSHP Open

Water Source Heat Pump

Communication Types:

Baud rates:

Data Bits:

Parity:

Stop Bits: Network Point Types:

Binary Inputs (BI)

Analog Outputs (AO)

Binary Outputs (BO)

Internal Floats (ADF)

Internal Integers (ADI)

Internal Bytes (BD)

Protocol Commands:

Identify Device Type

Sync Time

Poll With Acknowledge

Read Analog Input

Read Binary Input

Read Analog Output

Read Binary Output

Read Internal P arameter

Write Binary Input

Appendix D: Johnson Controls N2 Protocol Implementation Conformance Statement

Date: 06/30/2008

Vendor Name:

Product Names:

Product Model Number:

Protocol Description:

N2 is not a standard protocol, but one that was created by Johnson Controls, Inc. that has been made open and available to the public. The speed of N2 network is limited to only 9600 baud. The N2 slave address can be set from 01 to 99.

Product Description:

The WSHP Open is a factory-installed water source heat pump controller that is capable of speaking multiple protocols. The WSHP Open controller speaks the Johnson N2 Open Protocol as described in the Metasys N2 System Protocol Specification (for Vendors) document, revision 6/13/96. Further details on the N2 supported implementation are described below.

2-wire EIA-485 9600 8 None 1

Analog Inputs (AI)

Poll Without Acknowledge

Write Analog Input

WSHP Open v3 35

Appendix D: Johnson Controls N2 Protocol Implementation Conformance Statement

Write Analog Output

Write Internal Parameter

Override Analog Input

Override Binary Input

Override Internal Parameter

Write Binary Output

Override Release Request

36 WSHP Open v3

Carrier

WSHP Open

Water Source Heat Pump

J15

DS1

DS2

SW3

SW1

SW2

Tranceiver Type

Appendix E: LonWorks Protocol Implementation Conformance Statement

Date: 06/30/2008

Vendor Name:

Product Names:

Product Model Number:

Product Description:

The WSHP Open is a factory-installed water source heat pump controller that is capable of speaking multiple protocols. When the LonWorks Option Card (LON-OC), is installed in the field, it enables the WSHP Open to communicate over a LonTalk network. The WSHP Open does not conform to a standard LonWorks profile, but is self-documenting and any network management tool can manage and configure it over the network. An external interface file (.XIF), is also available so that any network management tool can design and configure the WSHP Open prior to installation. Contact your Carrier representative for this .XIF file.

LonWorks is an open protocol that requires the use Echelon's Neuron microprocessor to encode and decode the LonWorks packets. In order to reduce the cost of adding the Echelon chip to every module, a separate LonWorks Option Card (LON-OC) was designed to connect to the WSHP Open.

This accessory card must be ordered separately and is connected by attaching its ribbon cable into the

and

connector on the WSHP Open. The WSHP Open’s baud rate ( communicate with the LON-OC. The address switches (

: TP/FT 10

and

) are not used with LonWorks.

) must be set to 38.4k to

WSHP Open v3 37

Index

BACnet compliance • 27 BACnet MS/TP • 6

Compliance • 27

FCC compliance • 27

Johnson N2 • 9

LED's • 22 LonWorks • 10, 12 LonWorks Option Card • 11

Modbus • 7

Network Points List • 28

Sequence of operation

Alarms • 20 Auxiliary Heat • 17 Cooling • 15 Dehumidification • 18 Demand limiting • 20 Fire/Smoke detector input • 14

Indoor air quality and demand control

ventilation • 18 Indoor fan • 14 Power failure restart delay • 20 Reverse cycle heating • 16 Scheduling • 13 Shutdown input • 14 Waterside economizer • 19

Start-up • 12

Troubleshooting • 22

Troubleshooting for BACnet MS/TP • 23 Troubleshooting for LonWorks • 26 Troubleshooting for Modbus • 25 Troubleshooting for N2 • 25

Wiring

Inputs and outputs • 4

WSHP Open v3 38

A member of the United Technologies Corporation family · Stock symbol UTX · Catalog No. 11-808-500-01 · 11/29/2012

Carrier WSHP Open v3 Integration Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

What is the WSHP Open controller?

Introduction

Safety Considerations

Wiring inputs and outputs

Communications wiring - protocols

Protocol Overview

Installation

Configuring for BACnet MS/TP

Configuring for Modbus RTU

Configuring for N2

LonWorks

Configuring for LonWorks Option Card (Part #LON-OC)

Start-up

Commissioning the controller for LonWorks communication

Sequence of Operation

Scheduling

Fire/Smoke detector input

Shutdown input

Indoor fan

Cooling

Reverse cycle heating

Auxiliary Heat

Indoor air quality (IAQ) and demand control ventilation (DCV)

Dehumidification

Waterside economizer

Demand limiting

Power failure restart delay

Alarms

LED's

Troubleshooting

BACnet MS/TP

Modbus

Johnson N2

LonWorks

FCC Compliance

CE Compliance

BACnet Compliance

Compliance

Appendix A: Network Points List for WSHP Open

Appendix B: BACnet Protocol Implementation Conformance Statement

Appendix C: Modbus Protocol Implementation Conformance Statement

Appendix D: Johnson Controls N2 Protocol Implementation Conformance Statement

Appendix E: LonWorks Protocol Implementation Conformance Statement

Index