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HVAC Controls UCC SATURN User& Installer's Manual

Universal commercial controller
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S
ATURN
UCC
UNIVERSAL COMMERCIAL CONTROLLER
User & Installer Manual

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Summary of Contents for HVAC Controls UCC SATURN

  • Page 1 ATURN UNIVERSAL COMMERCIAL CONTROLLER User & Installer Manual...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents - 2 Setting Daylight Savings Times - 22 Installation - 3 After Hours Timer - 23 Wiring Overview - 3 After Hours Sensor Wiring - 23 Function Buttons - 3 Multistage Controls - 24 Equipment Connections - 3 Four Compressor Support - 24 Communications Terminals - 3...

  • Page 3: Installation

    Installation Wiring Overview The Saturn is a designed to precisely control a wide selection of HVAC systems in commercial applications. A brief input / output explanation is provided below, further function specific detail is provided through this manual. Function Buttons The Saturn has 3 function buttons directly under the LCD.

  • Page 4: Auxiliary Outputs

    Auxiliary Outputs Dry contact normally open and normally closed outputs are provided for an auxiliary relay that can be configured for a variety of functions in the Settings. 0-10V Outputs 2 x 0-10 Volt outputs (Z1, Z2) have been provided for a variety of functions that can be configured in the Settings.

  • Page 5: Sensor Wiring

    Sensor Wiring The Saturn will accept two types of temperature sensors: the 2-wire sensors (T-S1 and T-S2) and the proprietary 4-wire sensors (UCC-DTH, UCC-OTH, and UCC-TH). 2-Wire Sensors The standard 2-wire sensors are suitable for room temperature monitoring only. There are several types of 2-wires sensors available. 2-wire sensors connect to the T1 and T2 terminals next to it on the Saturn and are not polarity dependent.

  • Page 6: Setup

    Setup The PIN Prompt The Saturn has 3 main menus, some or all of which may be protected by a PIN. This PIN can be changed from the factory default of “032” by the installer. If the PIN has changed and the new PIN is not known by you, please contact us.

  • Page 7: Setting Installer Preferences

    Use the [SELECT] button to advance through the various parameters such as Date, Month, Year, Hour and Minute and then adjust these values with the UP/DOWN buttons to the desired value. (The Saturn will calculate the day of the week) Press [SAVE] to save the new time parameters and exit the menu.

  • Page 8: Installer Menu

    A list of the Basic & Advanced Installer Menu with details of the options within each menu is provided below. Installer Menu Basic Menu Advanced Menu Change Programming Options? Change System PIN? Change Auxiliary Relay Functions? Change Button Lock? Change Auxiliary Input Functions? Change Programming Options? Change 0-10V Output Settings? Change Temperature Control Limits?
  • Page 9 The table provided below provides a detailed description of the various menu items, their functions and the range the values that can be set where appropriate. Change System Pin? Default Value = 032 The Saturn has a 3-digit PIN from 000 to 199 that is used to access various menu items if enabled by the installer.
  • Page 10 Change Temperature Control Limits? Default = Heat 120°F & Cool 42°F If permitted, the user can have the ability to adjust the heating and cooling setpoints. The range of the user adjustment can be limited if desired by setting the values below. Options Heat –...
  • Page 11 Change Compressor Staging Limits? Default = 2°F The Saturn can control up to 4 stage heat pump system. You can select how far from setpoint each of the 4 stages turn on and how close to setpoint each stage will turn off. These are all set independently: Stage X ON Value (How far from setpoint this stage turns on) Stage X OFF Value (How far from setpoint this stage turns off)
  • Page 12 Change Room Sensor Functions? Default = OFF The room temperature sensor wiring can be used for additional functions other than just measuring the room temperature. When this sensor is open circuited or short circuited and seen as missing by the Saturn, additional functions can be performed. Options Force Off –...
  • Page 13 Change Indoor Fan Options? Default Unlocked & No Purge The indoor fan in the Saturn can be controlled by the user if desired (permitted to select Auto Fan or Fan On Mode) or locked into On or Auto Mode as set by this menu. Options Unlocked –...
  • Page 14 Auto – When Auto mode is used, the Saturn will run based on its time schedule only when this input is closed and stop when the input is open. This mode fits standard Mechanical Auto/ON/OFF switch logic. Change 0-10v Input Settings? Default = OFF Off - This input is not used.
  • Page 15 Change Economy Settings? Default = OFF You must assign one of the 0-10V outputs as described above before being permitted to adjust the economy settings within this menu. The Saturn will automatically change this setting to “ON” when you assign at least one 0-10V output to Fresh or return air if you have the outside air sensor fitted.
  • Page 16 Change PI Settings? Default = P Only The Saturn can apply integral action to its outputs if so desired. This action will alter the control output to bring the room to set temperature more quickly when using multistage equipment or equipment with variable capacity.
  • Page 17 Enter Service Settings Menu? Default = Off (All) This menu permits you to perform some minor maintenance and testing on the Saturn, as well as permits you to quickly commission the A/C system under Saturn control. Options Relay Test – Selecting [YES] will cycle all Saturn relays (and LEDs) to verify correct operation. It is recommended that this test is not performed while connected to an A/C system as this may stress the A/C system.

  • Page 18: Typical Wiring Diagrams

    Typical Wiring Diagrams Several wiring diagrams are provided below; they do not represent all possible wiring combinations, nor all control options provided by the Saturn. They are to be used in conjunction with the documentation provided by the Original Equipment Manufacturer as well as other diagrams within this manual.
  • Page 19 Single Stage Water Sourced Heat Pump This is similar to a standard single stage heat pump except that the auxiliary input is set to shut the Saturn down on loss of water, thereby protecting the system. This fault input can be used as a phase fail input other safety...

  • Page 20: Scheduling Controls

    Scheduling Controls Setting Daily Schedules The Saturn has 7-day scheduling with up to 2 START and 2 STOP events per day. When the Saturn is in START Mode it will use the START program as in the Setup section. When in the STOP program Mode, it will use the Setback set temperatures as defined in the Installer Menu.

  • Page 21: Set Holiday Schedules

    Set Holiday Schedules Up to 30 holiday events can be scheduled into the Saturn. These holiday events will override the time and temperature settings of the usual 7-day programs events as described above and replace it with the holiday programs. A holiday event can be used just once and then expire or be a “perpetual”...

  • Page 22: Setting Daylight Savings Times

    To set an event that occurs at the same time every year until manually cancelled, attempt to set a year prior to the current year as shown by the real time clock, the year number will change to a “P” to indicate this event is perpetual or permanent holiday event.

  • Page 23: After Hours Timer

    After Hours Timer The Saturn has an Auto Off timer that is typically used as an after-hours timer. It can also be used in Manual Mode as an auto off run timer. Placing a normally open momentary push button on the Saturn’s room sensor input will activate or cancel this timer.

  • Page 24: Multistage Controls

    Multistage Controls Four Compressor Support The Saturn can support up to 4 stage compressors for heat pump systems, by setting the Auxiliary Relay function to Compressor 4. Furthermore, on and off value between each stage can be set independently. Smart Staging The Saturn will give a running compressor a chance to bring the room to temperature on its own before starting additional compressors to reduce energy consumption.

  • Page 25: Economizer Controls

    Economizer Controls Economy Cycle A typical economy cycle wiring diagram has been provided below. In this example the Saturn is controlling a single stage heat pump. Other control configurations could also take advantage of the economy cycle mode of the Saturn. For the economy cycle to operate you must assign at least one of the 0-10V outputs for economy cycle function in the Installer Menu;...

  • Page 26: Economy Checklist

    Economy Checklist. Wire the fresh, return and relief / spill dampers to the Saturn 0-10V outputs. Note which output is controlling which damper. For example, 0-10V output 1 can be set to control the return air damper while 0-10V output 2 may be set to control the fresh air & spill damper (as shown in the example above).

  • Page 27: Advanced Features

    Advanced Features CO2 input The Saturn permits you to additionally add a 0-10VDC CO2 sensor that regulates the introduction of outside air based on the indoor air quality of the building. An authorised distributor can provide a 0-2,000 ppm CO2 sensor with infrared sensor and LCD.

  • Page 28: Setting The 1 Master Time Clock Saturn

    Setting the 1 Master Time Clock Saturn Large buildings often have multiple A/C units. Having each A/C unit on a separate time clock can often be troublesome and time consuming to program and setup. Using 1 Saturn as a master time clock and the balance of Saturns as auxiliary controller with the random delay start function active on all of the auxiliary Saturns thereby preventing all A/C systems waking up at exactly the same time (preventing potential damage to the building’s electrical supply or incurring high peak demand power loading charges).

  • Page 29: Communications Functions

    Communications Functions The Saturn has a powerful RS-485 driver chip with MODbus RTU communications drivers. In theory up to 247 Saturns can be connected on a single network node, however due to a number of real- world limitations each node should be limited to no more than 100 or 150 Saturns and only in ideal conditions with good quality shielded cable.

  • Page 30: Troubleshooting And Known Issues

    Troubleshooting and Known Issues Info Window Press and hold both the UP/DOWN buttons together to open the status window. This window gives an overview of the Saturn functions showing the status of all the Inputs and outputs. Z1 & Z2 The two 0-10V output values shown in volts.
  • Page 31 Problems Solutions Saturn will not show any information Saturn clock is set to “0” in installer menu so Saturn is other than room temperature on the locked into Manual mode. See “Change Display display. The <F2> button does not Settings”. work.

  • Page 32: Specifications

    Warranty ............36 Months RTB Date Installed Installed By Due to ongoing product improvement iO HVAC Controls reserves the right to change the specifications of the Saturn (or its components) without notice. All rights reserved. © iO HVAC Controls 2024.

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