Installation and Maintenance Manual IM 927- 3 Group: Daikin Controls Part Number: 669207603 Date: May 2012 Supercedes: IM 927-2 MicroTech® III Water Source Heat Pump LONWORKS® Communication Module NOTICE Use this manual to physically connect the LonWorks Communication Module to Daikin MicroTech III Water Source Heat Pump Controller, and connect the MicroTech III Controller to the network.
Contents REVISION HISTORY ............................................................................................................................ 3 TRADEMARK NOTICES ....................................................................................................................... 3 GENERAL INFORMATION ............................................................................................................ 4 HAZARD IDENTIFICATION MESSAGES .........................................................
Revision History IM 927 September 2008 Initial release IM 927-1 July 2009 Added PN to front cover, added sensors to Parts list. IM 927-2 March 2011 Added Wink details to integration section. Changed unit controller description from Unitary to Applied Terminal Systems. IM 927-3 May 2012 Updated Daikin logo and associated references. Minor formatting.
General Information This manual contains the information you need to install the LONWORKS Communication Module to a MicroTech III Water Source Heat Pump (WSHP) Unit Controller and integrate it into the network. Hazard Identification Messages ! DANGER Dangers indicate a hazardous situation which will result in death or serious injury if not avoided. ! WARNING Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not avoided.
Description A LONWORKS Communication Module provides the interface between the MicroTech III WSHP Unit Controller and a LONWORKS Local Operating Network (LON). It translates the LonTalk® variables used on the network to the variables used in the unit controller and vice versa. It translates in accordance with the LONMARK Functional Profile. Profiles are interpreted in loaded programs (firmware).
Figure 1. LONWORKS Communication Module Major Components LED U7 U5 Board-board Connector 8 pin header U8 Service Switch U6 U2 U4 Neuron Chip U10 TB1 Shield Wire ECHELON Flash Memory U1 Comm Sig B Transceiver Comm Sig A MTIIIUC-LON Comm Card Part # 668105801 Light Emitting Diode (LED) Table 1 below describes the LONWORKS communication module Service LED activity. Table 1. LED Activity Summary LED Activity Description LED flashes once at power up or comes on when pressing the Service switch.
Table 2. LONWORKS Communication Module Network Connectors Pin Designation Function 1 2 3 SHLD -/A +/B Not Used FTT-10 FTT-10 8-Pin Header The 8-pin header connects the Unit Controller Baseboard Serial Peripheral Interface (SPI) Bus to the LONWORKS communication module at the bottom of the communication module (see Figure 1).
Installation The LONWORKS communication module can be installed in the field or it can be installed in the factory. The module mounts on connector pins and is held in place with four plastic, edge-holding circuit board supports. Field wiring connections to the LONWORKS network are made at the threeterminal plug (TB1) on the LONWORKS communication module. Mounting LONWORKS Communication Module Installation Procedure ! DANGER The terminals on the Water Source Heat Pump unit controller are high voltage.
8. Orient the LONWORKS communication module’s printed circuit board so that the component side faces away from the baseboard and the connector pins can mate with the connector on the LONWORKS communication module. 9. Press the module onto the connector pins and standoffs until you hear the faint click of the locking standoffs securing the module in place. 10. Reinsert the plug into TB1 on the LONWORKS communication module (see Figure 1). Figure 2.
Integration Integrating the LONWORKS communication module into a BAS involves three steps: • Connecting the unit (node) to the network • Addressing and establishing communications with the unit • Configuring the unit to the building Connecting Unit to the Network After the LONWORKS communication module has been properly installed on the WSHP unit controller, it can then be connected into the LONWORKS network.
Network Topology Each LONWORKS communication module is equipped with an FTT-10A transceiver for network communications. This transceiver allows for (1) free topology network wiring schemes using twisted pair (unshielded) cable and (2) polarity insensitive connections at each node. These features greatly simplify installation and reduce potential network commissioning issues. Additional nodes may be added with little regard to the existing cable routing.
Free Topology Restrictions Although free topology wiring is very flexible, there are restrictions. A summary follows below. Refer to the Echelon FTT-10A User’s Guide for details. The maximum number of nodes per segment is 64. 1. The maximum total bus length depends on the wire size (see Qualified Cables section for details). 2. One termination is required in each segment. It may be located anywhere along the segment.
Note: If the bus is wired directly to the node, there is no stub, and thus the stub length is zero. If you are wiring to a field terminal strip on a unit, you should account for any factory wiring between the terminal strip and the MicroTech III unit controller. This wiring is considered part of the stub. Physical Network Qualified Cables Echelon has qualified three twisted-pair network communications cables that are available from a large number of different sources.
Addressing and Establishing Communication LONWORKS Network Addressing Every Neuron Chip has a unique 48-bit Neuron ID or physical address. This address is generally used only at initial installation or for diagnostic purposes. For normal network operation, a device address is used. Device addresses are defined at the time of network configuration. All device addresses have three parts. The first part is the Domain ID, designating the domain.
Resource Files Resource files contain definitions of functional profiles, network variables types, configuration property types, and enumerations. Resource files are used during the commissioning process and are required for displaying user-specific variables that are not included in the standard device profile. These files must be downloaded to the BAS front end workstation or other commissioning device. They are available at www.DaikinApplied.com or www.lonmark.org.
Service Information Test Procedures If you can control the unit from the local room sensor or thermostat, but you are unable to communicate with the unit via the network: • Check the network wiring. • Check addressing -- press the Service Switch on the communication module to send the service message to the network. The service Switch message contains the Neuron ID and the program code identification of the node.
