tekmar Universal Reset Control 363
Model: U 363 | Revision: 06/99
Introduction
The Universal Reset Control 363 is a microprocessor-based control designed to maximize the comfort and efficiency of a hydronic heating system. It automatically adjusts boiler and mixed loop water temperatures using outdoor reset. Outdoor reset increases water temperature as outdoor temperature drops, improving energy efficiency by matching heat delivery to building heat loss. This reduces indoor temperature swings, particularly in fall and spring. The 363 can also integrate indirect fired Domestic Hot Water (DHW) and tekmar zone controls.
User Interface
The tekmar Universal Mixing Control 363 features four access levels: LTD (limited), USER, INST (Installer), and ADV (advanced). This brochure covers LTD and USER levels. Installer and Advanced levels should only be adjusted by qualified service personnel.
LCD Display Components
- Item Field: Displays an abbreviated name of the selected item.
- Number Field: Displays the current value of the selected item.
- Menu Field: Displays the current menu (e.g., View, Adjust, Monitor, Schedule, Misc).
- Status Field: Displays the current status of the control's inputs, outputs, and operation. Symbols are often visible only when the View Menu is selected.
Control Buttons
The control has a Liquid Crystal Display (LCD) and four push buttons: Menu, Item, [up-arrow], and [down-arrow]. These are used to view and adjust settings.
- Menu Button: Selects menus. Pressing and releasing advances to the next menu.
- Item Button: Selects items within a menu. Pressing and releasing advances to the next item. Returns to the first item when the last is reached.
- [up-arrow] / [down-arrow] Buttons: Used to make adjustments to selected settings.
Status Indicators (Symbols)
The Status Field indicates active outputs. Symbols include:
- Open / Close: [open-arrow] / [close-arrow] - Indicates actuator position for valves.
- Mixing Device Output Scale: Shows output of injection pump or mixing valve. [increasing-arrow] / [decreasing-arrow] indicate output change.
- Burner: [flame-symbol] - Indicates the boiler relay is on.
- Pump: [gear-symbol] - Indicates boiler pump 1 and/or mixing pump 2 is operating.
- DHW Pump / Valve: [water-drop-symbol] - Indicates the DHW pump or valve is on.
- Storage Operation: [storage-tank-symbol] - Indicates a variable speed injection pump drawing heat from storage.
- Boost: [rocket-symbol] - Indicates the control is in boost mode after a setback.
- UnOccupied Mode: [person-symbol] - Indicates the control is in unoccupied mode.
- Occupied Mode: [house-symbol] - Indicates the control is in occupied mode.
- Override: [circular-arrow-symbol] - Indicates the control is in override mode.
- Warning: [warning-symbol] - Indicates an error or limit reached.
- Lock - Unlock: [lock-symbol] - Indicates access level status.
- Units of Measurement: [units-symbol] - Displays units like °F, °C, sec, min, hr.
- Pointer: [pointer-symbol] - Indicates control operation as text.
Menu Navigation and Adjustment
Content is organized into menus. To select a menu, use the Menu button. Within a menu, use the Item button to cycle through available items. To adjust a setting, select the menu and item, then use the [up-arrow] and [down-arrow] buttons.
363 View Menu
Displays current system parameters.
| Item | Description | Range |
|---|---|---|
| OUTDOOR | Current outdoor air temperature as measured by the outdoor sensor. This is the default display. | -67 to 149°F (-55 to 65°C) |
| ROOM TRG | Target room air temperature. "-- -- --" denotes no heat is required. Will not display if RTU is connected. | 35 to 100°F (2 to 38°C) |
| ROOM | Measured room air temperature at the indoor sensor. Will not display if RTU is connected. | -58 to 167°F (-50 to 75°C) |
| MIX SUP | Current mixed supply water temperature as measured by the mixing sensor. | -31 to 266°F (-35 to 130°C) |
| BOIL SUP | Current boiler supply water temperature as measured by the boiler sensor. | -31 to 266°F (-35 to 130°C) |
| STORAGE | Current storage tank water temperature as measured by the storage tank sensor. | -31 to 266°F (-35 to 130°C) |
| DHW TAG | Target DHW tank temperature. Viewable only if a tekmar sensor is used. | OFF, 70 to 190°F (21 to 88°C) |
| DHW | Current DHW tank temperature as measured by the DHW tank sensor. | -31 to 266°F (-35 to 130°C) |
363 Adjust Menu
Allows adjustment of system settings.
| Item | Description | Range |
|---|---|---|
| MIX ROOM Occ | Desired room air temp during Occupied period for mixing zone(s). LTD access: ±3°F (±1°C). | 35 to 100°F (2 to 38°C) |
| MIX ROOM UnOcc | Desired room air temp during UnOccupied period for mixing zone(s). LTD access: ±3°F (±1°C). | 35 to 100°F (2 to 38°C) |
| SLAB MIN | Minimum slab sensor temp, not in Warm Weather Shut Down (WWSD). Adjustable if tekmar sensor connected. | OFF, 35 to 120°F (2 to 49°C) |
| MIX SETB | Mixing Water Temperature Setback: reduction in supply temp during UnOccupied mode. | 0 to 50°F (0 to 28°C) |
| BOIL ROOM Occ | Desired room air temp during Occupied period for boiler zones. LTD access: ±3°F (±1°C). | 35 to 100°F (2 to 38°C) |
| BOIL ROOM UnOcc | Desired room air temp during UnOccupied period for boiler zones. LTD access: ±3°F (±1°C). | 35 to 100°F (2 to 38°C) |
| BOIL SETB | Boiler Water Temperature Setback: reduction in supply temp during UnOccupied mode. | 0 to 50°F (0 to 28°C) |
| DHW TANK Occ | DHW storage tank temp during Occupied period. Adjustable if tekmar sensor used. | OFF, 70 to 190°F (21 to 88°C) |
| DHW TANK UnOcc | DHW storage tank temp during UnOccupied period. Adjustable if tekmar sensor used. | OFF, 70 to 190°F (21 to 88°C) |
| WWSD Occ | System's warm weather shut down during Occupied period. | 35 to 100°F, OFF (2 to 38°C) |
| WWSD UnOcc | System's warm weather shut down during UnOccupied period. | 35 to 100°F, OFF (2 to 38°C) |
363 Monitor Menu
Records highest/lowest temperatures.
| Item | Description | Range |
|---|---|---|
| OUT HI | Highest outdoor air temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | -67 to 149°F (-55 to 65°C) |
| OUT LO | Lowest outdoor air temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | -67 to 149°F (-55 to 65°C) |
| TANK HI | Highest DHW tank or Storage tank temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | 0 to 255°F (-18 to 124°C) |
| TANK LO | Lowest DHW tank or Storage tank temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | 0 to 255°F (-18 to 124°C) |
363 Schd (Schedule) Menu
Configures setback overrides.
| Item | Description | Range |
|---|---|---|
| OVERR:DE | Type of setback override in effect. DIP switch setting determines availability. | NONE, TMPY Occ, PERM Occ, TMPY UnOcc, PERM UnOcc, AWAY |
| None | No override. | |
| TMPY Occ | Overrides to Occupied setting for 3 hours. | |
| PERM Occ | Overrides to Occupied setting until new override is selected. | |
| TMPY UnOcc | Overrides to UnOccupied for 3 hours. | |
| PERM UnOcc | Overrides to UnOccupied setting until new override is selected. | |
| AWAY | Room & WWSD temperature at 62°F (17°C), no DHW. |
363 Misc (Miscellaneous) Menu
Configuration settings.
| Item | Description | Range |
|---|---|---|
| UNITS | Units of measure for temperature display (°F, °C). | °F, °C |
| BACKLITE | LCD backlight operating mode and timeout. Options: OFF, 30 sec, ON. | OFF, 30 sec, ON |
| ACCESS | Access level for the control. DIP switch setting determines level. | ADV, INST, USER, LTD |
Room Temperature Unit (RTU) 062, 063 Integration
A single RTU can connect to the mixed side (tN1/tN2) of the Universal Reset Control 363 for a one-zone mixed water temperature system. For multiple zones, use a tekmar zone control or mix demand input. Connecting an RTU makes certain mixing-side items unavailable on the 363's display; they will appear on the RTU's display. Availability depends on the RTU model (062 or 063).
363 RTU View Menu
| Item | Description | Range |
|---|---|---|
| ROOM | Current room air temperature. | 14 to 167°F (-10 to 75°C) |
| ROOM TRG | Target room air temperature. | 35 to 100°F (2 to 38°C) |
| OUTDOOR | Current outdoor air temperature as measured by the outdoor sensor. | -67 to 149°F (-55 to 65°C) |
| SLAB | Current slab sensor temperature. Available only if a tekmar slab sensor is connected to an RTU 063. | -58 to 167°F (-50 to 75°C) |
363 RTU Adjust Menu
| Item | Description | Range |
|---|---|---|
| ROOM Occ | Desired room air temp during Occupied period for mixing zone. LTD access: ±3°F (±1°C). | 35 to 100°F (2 to 29°C) |
| ROOM UnOcc | Desired room air temp during UnOccupied period for mixing zone. LTD access: ±3°F (±1°C). | 35 to 100°F (2 to 29°C) |
| SLAB MIN | Minimum slab sensor temp when not in WWSD. Viewable if tekmar slab sensor connected to RTU 063. | OFF, 35 to 120°F (2 to 49°C) |
363 RTU Monitor Menu
| Item | Description | Range |
|---|---|---|
| OUT HI | Highest outdoor air temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | -67 to 149°F (-55 to 65°C) |
| OUT LO | Lowest outdoor air temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | -67 to 149°F (-55 to 65°C) |
| ROOM HI | Highest room air temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | 14 to 167°F (-10 to 75°C) |
| ROOM LO | Lowest room air temp recorded since last clear. Clear by holding [up-arrow] and [down-arrow]. | 14 to 167°F (-10 to 75°C) |
363 RTU Schd (Schedule) Menu
| Item | Description | Range |
|---|---|---|
| OVERR:DE | Type of setback override. Menu/item viewable if Setback/None DIP switch is set to Setback. | NONE, TMPY Occ, PERM Occ, TMPY UnOcc, PERM UnOcc, AWAY |
| None | No override. | |
| TMPY Occ | Overrides to Occupied setting for 3 hours. | |
| PERM Occ | Overrides to Occupied setting until new override is selected. | |
| TMPY UnOcc | Overrides to UnOccupied for 3 hours. | |
| PERM UnOcc | Overrides to UnOccupied setting until new override is selected. | |
| AWAY | Room & WWSD temperature at 62°F (17°C), no DHW. |
363 RTU Misc (Miscellaneous) Menu
| Item | Description | Range |
|---|---|---|
| UNITS | Units of measure for temperature display by the RTU (°F, °C). | °F, °C |
| BACKLITE | RTU backlight operating mode and timeout. Options: OFF, 30 sec, ON. | OFF, 30 sec, ON |
| ACCESS | Access level for the RTU. DIP switch setting determines level. | ADV, INST, USER, LTD |
Remote Display Module (RDM)
An optional Remote Display Module can connect to the 363 when an RTU is not used. It displays all 363 menu items and allows adjustments. It connects via two wires and has the same physical appearance as an RTU.
