- Data Brochure D 361 03/09 Mixing Control 361 The Mixing Control 361 is designed to control the supply water temperature to a hydronic system in order to provide outdoor reset or setpoint operation. The control uses a variable speed injection pump to regulate the supply water temperature, while protecting the boiler against flue gas condensation. The control has a Liquid Crystal Display (LCD) to view system status and operating information.
How To Use The Data Brochure This brochure is organized into four main sections. They are: 1) Sequence of Operation, 2) Installation, 3) Control Settings, and 4) Troubleshooting. The Sequence of Operation section has three sub-sections. We recommend reading Section A: General Operation of the Sequence of Operation, as this contains important information on the overall operation of the control. Then read the sub-sections that apply to your installation.
Display Number Field Item Field Displays the current value of the selected item Displays an abbreviated name of the selected item OUTDR DSGN DIFF BOIL TARGET MIX MIN MAX ROOM WWSD INDR UNOCC Terminal Unit 10 30 50 VIEW ADJUST °F °C 70 90 % Out Displays the current status of the control’s inputs, outputs and operation Displays the current menu Mixing Demand { Status Field Menu Field Buttons Selects Menus, Items and adjusts settings Item Symbol Description OCC Pump Displays when the mix
Sequence of Operation Section A General Operation Page 4-5 Section B Mixing Page 5-8 Section C Boiler Operation Page 8-9 Section A —General Operation POWERING UP THE CONTROL When the Mixing Control 361 is powered up, the control displays the control type number in the LCD for 2 seconds. Next, the software version is displayed for 2 seconds. Finally, the control enters into the normal operating mode.
EXERCISING The 361 has a built-in exercising function. If a pump has not been operated at least once every 3 days, the control turns on the output for 10 seconds. This minimizes the possibility of a pump seizing during a long period of inactivity. While the control is exercising, the Test LED flashes. Note: The exercising function does not work if power to the control or pumps is disconnected. SETBACK (UNOCCUPIED) To provide greater energy savings, the 361 has a setback capability.
CHARACTERIZED HEATING CURVE When used as a mixing reset control, the 361 varies the supply water temperature based on the outdoor air temperature. The control takes into account the type of terminal unit that the system is using. Since different types of terminal units transfer heat to a space using different proportions of radiation, convection and conduction, the supply water temperature must be controlled differently.
High Mass Radiant (1) This type of a hydronic radiant floor is embedded in either a thick concrete or gypsum pour. This heating system has a large thermal mass and is slow acting. Default values: MIX DSGN = 120°F (49°C), MIX MAX = 140°F (60°C), MIX MIN = OFF Low Mass Radiant (2) This type of radiant heating system is either attached to the bottom of a wood sub-floor, suspended in the joist space, or sandwiched between the sub-floor and the surface.
MIXING MINIMUM (MIX MIN) WARM WEATHER SHUT DOWN (WWSD) OCC & UNOCC When the outdoor air temperature rises above the WWSD setting, the 361 turns on the WWSD segment in the display. When the control is in Warm Weather Shut Down, the Mixing Demand pointer is displayed, if there is a demand. However, the control does not operate the heating system to satisfy this demand. If the control is in setpoint mode, the WWSD feature is not functional.
Section C2: Boiler Sensor Placement BOILER SENSOR ON THE SUPPLY (Boiler Sensor DIP switch = Supply) Boiler supply sensor The boiler sensor can be located on the boiler supply if the 361 is the only control that is operating the boiler. When in the supply mode, the 361 determines the required operating temperature of the boiler using Boiler Load Reset.
Installation CAUTION Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury. It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. This electronic control is not intended for use as a primary limit control. Other controls that are intended and certified as safety limits must be placed into the control circuit.
Output Connections 5 3 4 Power Sys L N Pmp System Pump Contact (Sys Pmp) The Sys Pmp output terminal (5) on the 361 is a powered output. When the relay in the 361 closes, 120 V (ac) is provided to the Sys Pmp terminal (5) from the Power L terminal (3). To operate the system pump, connect one side of the system pump circuit to terminal (5), and the second side of the pump circuit to the neutral (N) terminal (6).
15 16 17 Com Out Indr Indoor Sensor If an indoor sensor is used, connect the two wires from the sensor to the Com and Indr terminals (15 and 17). The indoor sensor is used by the 361 to measure the room air temperature. 11 12 UnO Com Sw Unoccupied Switch If an external timer (tekmar Timer 032) or switch is used, connect the two wires from the external switch to the UnO Sw and Com terminals (11 and 12). When these two terminals are shorted together, the control registers an unoccupied signal.
Test The Outputs System Pump (Sys Pmp) If a system pump is connected to the Sys Pmp terminal (5), make sure that power to the terminal block is off, and install a jumper between the Power L and the Sys Pmp terminals (3 and 5). Install a second jumper between Power N and N terminals (4 and 6). When power is applied to the Power L and Power N terminals (3 and 4), the system pump should start.
DIP Switch Settings The DIP Switch settings on the control are very important and should be set to the appropriate settings prior to making any adjustments to the control through the user interface. The DIP switch settings change the items that are available to be viewed and / or adjusted in the user interface.
ADJUST °F Press and release the Item button to advance to the units adjustment. Use the to °F or °C. or button to set the scale ADJUST To exit the ADJUST menu, press and release the Item button to advance to the ESC item. Then either press the or button, or leave the buttons alone for 20 seconds. SETPOINT CONTROL Access the ADJUST menu by pressing and holding simultaneously for 1 second, the Item, the word ADJUST in the top right corner. OUTDR DSGN and buttons.
Se ct i In on st a Ad ller va nc ed Adjust Menu (1 of 2) Display ADJUST °F ROOM The desired room air temperature during an occupied (Day) period. (OUTDR DSGN ≠ OFF) 35 to 100°F (2 to 38°C) B2 The desired room air temperature during an unoccupied (Night) period. (OUTDR DSGN ≠ OFF) 35 to 100°F (2 to 38°C) B2 Mixing setpoint temperature. (OUTDR DSGN = OFF) 60 to 200°F (16 to 93°C) B2 The design outdoor air temperature used in the heat loss calculation for the heating system.
Se ct i In on st a Ad ller va nc ed Adjust Menu (2 of 2) Display ADJUST °F WWSD OCC Range B3 The system’s warm weather shut down during the occupied (Day) period. 35 to 100°F, OFF (2 to 38°C, OFF) B3 The system’s warm weather shut down during the unoccupied (Night) period. 35 to 100°F, OFF (2 to 38°C, OFF) The units of measure that all of the temperatures are to be displayed in the control.
Troubleshooting When troubleshooting any heating system, it is always a good idea to establish a set routine to follow. By following a consistent routine, many hours of potential headaches can be avoided. Below is an example of a sequence that can be used when diagnosing or troubleshooting problems in a hydronic heating system. Establish the Problem Establish the problem. Get as much information from the customer as possible about the problem.
Error Messages VIEW The control was unable to read a piece of information from its EEPROM. This error can be caused by a noisy power source. The control will load the factory defaults and stop operation until all the settings are verified. OUTDR VIEW The control is no longer able to read the outdoor sensor due to a short circuit. In this case the control assumes an outdoor temperature of 32°F (0°C) and continues operation. Locate and repair the problem as described in the Data Brochure D 070.
Technical Data Mixing Control 361 Variable Speed D 361, A 361’s, D 001, D 070, E 021. Microprocessor PID control; This is not a safety (limit) control. 3.0 lb. (1380 g), Enclosure A, blue PVC plastic 6-5/8” H x 7-9/16” W x 2-13/16” D (170 x 193 x 72 mm) CSA C US, CSA 22.2 No 24 and UL 873, meets class B: ICES & FCC Part 15. Indoor use only, 32 to 102°F (0 to 39°C), < 90% RH non- condensing. 120 V (ac) ±10%, 50/60 Hz, 1650 VA 240 V (ac) 2.4 A (FLA) 5 A (LRA), fuse T2.
