Tekmar Boiler Control 263 Data Brochure
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Tekmar Boiler Control 263 Data Brochure

Tekmar Boiler Control 263 Data Brochure

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- Data Brochure
Boiler Control 263
The tekmar Boiler Control 263 can control the supply water temperature from a single modulating boiler or up to 2 on / off stages
based on outdoor temperature, domestic hot water requirements, or setpoint requirements. A large easy to read display provides
current system temperatures and operating status. The control has an internal setback timer, which can have 2 events per day on a
24 hour, 5-1-1 day or 7 day schedule.
Additional functions include:
•
Outdoor Reset
•
Installer and Advanced access levels
•
Primary pump output
•
Pump exercising
•
Pump purging
•
Boiler demand for space heating loads
•
DHW demand for domestic hot water loads
Note:
Boiler, DHW, or
setpoint demand
must be powered
with 20 to 260 V (ac)
Boiler Control 263
before the boiler is
Two Stage / One Modulating Boiler, DHW & Setpoint
able to fire.
1 2 3
Boiler
Demand
Input
Boiler
Demand
Input
DHW
Demand
Input
Setpoint
Demand
Output
Input
Primary
115 V (ac)
Pump
Power Supply
Menu
Item
4
5
6 7
8
9 10
DHW
DHW
Com
Setp
Prim
Power
Dem
Dem
Dem
P1
L
N
Pmp/Vlv
OR
M
Output
DHW Pump or
Output
DHW Valve
Boiler
•
Setpoint demand for setpoint loads
•
Optional indoor sensor for room air temperature control
•
Test sequence to ensure proper component operation
•
Internal setback timer for energy savings
•
Setback input for energy savings
•
CSA C US certified
Soft Stop
Setback
Advanced
Boiler Demand
DHW Demand
Installer
Setpoint Demand
None
Modulation
Priority Override
Made in Canada by
tekmar Control Systems Ltd.
Power
Relays
Demands
Signal wiring must be rated at least 300 V.
Do not apply power
11 12
13
14
15
16
17 18 19 20 21 22 23
Relay
Relay
Mod 1 mA
Com
1
1
2/P2
+
-
OR
Output
Output
Boiler
Pump
1 of 36
Rotate
DHW Sensor
Off
Exercise
Off
Test
115 V ±10% 50/60 Hz 600 VA
230 V (ac) 5 A 1/3 hp, pilot duty 240 VA
20 to 260 V (ac) 2 VA
UnO
DHW Indr
Com Boil Out
Sw
Output
Output
tekmar
Boiler
Timer
© 2009
D 263
03/09
Input
Outdoor
Sensor
Included
Input
Universal
Sensor
Included
Input
Indoor
Sensor
Optional
Input
Universal
Sensor
Optional
D 263 - 03/09

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Summary of Contents for Tekmar Boiler Control 263

  • Page 1 03/09 The tekmar Boiler Control 263 can control the supply water temperature from a single modulating boiler or up to 2 on / off stages based on outdoor temperature, domestic hot water requirements, or setpoint requirements. A large easy to read display provides current system temperatures and operating status.

  • Page 2: Table Of Contents

    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) Testing and Troubleshooting. The Sequence of Operation section has six sub-sections. We recommend reading Section A: General of the Sequence of Operation, as this contains important information on the overall operation of the control.

  • Page 3: Display

    Display Menu Field Number Field Displays the Displays the current value current menu of the selected item Item Field Displays an abbreviated name of the selected item Status Field Displays the Buttons current status Selects Menus, Items of the control's and adjust settings inputs, outputs and operation...

  • Page 4: Sequence Of Operation

    Definitions The following defined terms and symbols are used throughout this manual to bring attention to the presence of hazards of various risk levels, or to important information concerning the life of the product. - Warning Symbol: Indicates presence of hazards which can cause severe personal injury, death or substantial property damage if ignored.
  • Page 5 TYPES OF DEMANDS The control stages or modulates the boiler(s) to control supply water temperature to a hydronic system. The supply water temperature is based on outdoor reset, a fixed temperature for DHW, or a fixed temperature for setpoint. Boiler Reset When a boiler demand signal from the heating system is present, the control operates the boiler(s) to maintain the supply temperature based on the outdoor air temperature and the Characterized Heating Curve settings.

  • Page 6: Section B: Boiler Operation

    Section B: Boiler Operation Section B1 Section B2 Section B3 Boiler Mode 1 Mode 2 Operation Two Stage Modulating Operation Boiler Operation Section B1: Boiler Operation BOILER TARGET TEMPERATURE The boiler target temperature is determined by the type of demand received by the control. A boiler demand calculates a boiler target based on the characterized heating curve settings and the outdoor air temperature.
  • Page 7 ROTATION The control’s Equal Run Time Rotation function is fixed at 48 hours. The firing order of the boilers changes whenever one boiler accumulates 48 hours more running time than the other boiler. After each rotation, the boiler with the least running hours is the first to fire and the boiler with the most running hours is the last to fire.
  • Page 8 Auto Differential Off If the Auto Differential is selected, the control automatically determines the best differential as the load changes. This reduces potential short cycling during light load conditions. Differential Time Section B3: Mode 2 - One Modulating Boiler and Pump Operation MODULATION When operating in Mode 2, the control provides a modulating output signal to operate a single modulating boiler.
  • Page 9 Example 1: A boiler requires a 1.8 V (dc) signal to fire the boiler at low fire. The boiler can be modulated to 10 V (dc) where it reaches high fire. This means the boiler’s input signal range is 1.8 to 10 V (dc). The 263 control has an output signal range of 0 to 20 mA which can be externally converted to 0 to 10 V (dc) using a 500 Ω...
  • Page 10 DIFFERENTIAL A modulating boiler must be operated with a differential while operating in low fire. The boiler differential is divided around the boiler target temperature. The boiler burner ignites at low fire when the supply water temperature is ½ of the Boiler Differential setting below the boiler target temperature.

  • Page 11: Section C: Pump Operation

    Section C: Pump Operation Section C1 Pump Operation Section C1: Pump Operation PRIMARY PUMP OPERATION The primary pump operates under the following conditions: • A boiler demand is present and the control is not in Warm Weather Shut Down (WWSD). •...

  • Page 12: Section D: Boiler Reset Operation

    Section D: Boiler Reset Operation Section D1 Boiler Reset Section D1: Boiler Reset Operation BOILER DEMAND A boiler demand is required in order for the control to provide heat to the heating system. A boiler demand is generated by applying a voltage between 24 and 230 V (ac) across the Boiler Demand terminals (1 and 2).
  • Page 13 TERMINAL UNITS The control provides for a selection between six different terminal unit types: two types of radiant floor heat, fancoil, fin-tube convector, radiator and baseboard. When a terminal unit is selected, the control automatically loads the design supply temperature, maximum supply temperature, and minimum supply temperature.

  • Page 14: Section E: Dhw Operation

    A DHW Demand is generated on the control by using one of two methods: either an external DHW demand from an aquastat or an internal demand from a 10K tekmar sensor. If an external DHW demand and a DHW sensor are present simultaneously, the control ignores the external DHW demand.
  • Page 15 DHW MODE AND PRIORITY OPERATION The control has four different modes of DHW operation, which depends on the piping arrangement of the DHW tank. It is often desirable to limit or even stop the flow of heat to the heating system when the DHW tank calls for heat. This allows for a faster recovery of the DHW tank.
  • Page 16 CONDITIONAL DHW PRIORITY The Conditional DHW Priority Override applies to DHW MODE 2 and 4. If the boiler supply temperature is maintained at or above the required temperature during DHW generation, this indicates that the boiler(s) has enough capacity for DHW and possibly heating as well.

  • Page 17: Section F: Setpoint Operation

    For correct operation, close attention must be paid to the mechanical layout of the system. When the control turns off the primary pump (Prim P1), flow to the heating system must stop. If flow is not stopped, the temperature in the heating system can exceed the maximum desired temperature and can result in damage to the heating system.

  • Page 18: Installation

    STEP ONE GETTING READY Check the contents of this package. If any of the contents listed are missing or damaged, please contact your wholesaler or tekmar sales representative for assistance. Type 263 includes: One Boiler Control 263, One Outdoor Sensor 070, One Universal Sensor 082, One 500 Ω Resistor, Data Brochures D 263, D 070, D 001, Application Brochure A 263.

  • Page 19: Boiler Demand

    STEP FOUR ELECTRICAL CONNECTIONS TO THE CONTROL General The installer should test to confirm that no voltage is present at any of the wires. Push the control into the base and slide it down until it snaps firmly into place. Powered Input Connections 115 V (ac) Power 115 V (ac)
  • Page 20 Relay 1 Contact Mode 1 - Two ON / OFF Stages The Relay 1 terminals (11 and 12) are isolated outputs in the control. There is no power available on these terminals from the control. These terminals are to be used as a switch to either make or break power to a boiler or a Lo fire stage on a single boiler.

  • Page 21: Outdoor Sensor

    0 - 135 Ω Actuating Motor The 4 to 20 mA output can be converted to a 0 to 135 Ω output for a Modutrol IV™ gas valve actuating motor using a tekmar 0 to 135 Ω tekmar tekmar Converter 005 (sold separately).
  • Page 22 UnOccupied Switch If an external timer (tekmar Timer 032) or switch is used, connect the two wires from the external switch to the Com and UnO Sw terminals (17 and 18). When these two terminals are shorted together, the control registers an unoccupied (UNOCC) signal.
  • Page 23 Setpoint Demand If a setpoint demand is used, measure the voltage between the 20 to 260 V (ac) Setp Dem and the Com Dem terminals (5 and 4). When the setpoint demand device calls for heat, between 20 and 260 V (ac) should be measured at the terminals.
  • Page 24 DHW Pump Or Valve (DHW Pmp / Vlv) If a DHW pump or DHW valve is connected to the DHW Pmp / Vlv terminals (9 and 10), make sure the power to the pump or valve circuit is off and install a jumper between those terminals.

  • Page 25: Dip Switch Settings

    Menu Item Item Made in Canada by Made in Canada by tekmar Control Systems Ltd. tekmar Control Systems Ltd. If a DIP switch is changed while the control is powered up, the Power Power 115 V ±10% 50/60 Hz 2000 VA 115 V ±10% 50/60 Hz 2000 VA...

  • Page 26: Control Settings

    View Menu (1 of 1) Description Display Range Outdoor Current outdoor air temperature as measured by the -76 to 149°F outdoor sensor. (-60 to 65°C) Room Occupied Current room air temperature as measured by the indoor sensor. 23 to 113°F (-5 to 45°C) This item is only available when an indoor sensor is connected to the control.

  • Page 27: Adjust Menu

    Adjust Menu (1 of 3) Actual Description Display Range Setting 1 (2 on / off) Mode Selects the control mode of operation. 2 (1 mod & pump) Default = 1 35 to 100°F Room Occupied The desired room air temperature (2 to 38°C) during the occupied period.
  • Page 28 Adjust Menu (2 of 3) Actual Description Display Range Setting Au, 2 to 42°F Boiler Differential The temperature differential that the (Au, 1 to 23°C) control is to use when it is operating the boiler(s). Default = Au Boiler 1 Selects whether or not boiler 1 is operational. Au (automatic), OFF This item is only available in operating mode 1.
  • Page 29 Adjust Menu (3 of 3) Actual Description Display Range Setting DHW Exchange Unoccupied Selects whether or not a DHW demand will be responded to during the UnOccupied period. OFF, On Default = OFF This item is only available when the DHW Sensor / Off DIP switch is set to Off and the Setback / None DIP switch is set to Setback.

  • Page 30: Time Menu

    Time Menu (1 of 1) Note: The Setback / Off DIP switch must be in the Setback position in order to have access to the TIME menu. SETTING THE TIME Step One Press and release the Menu button until the TIME menu is reached. Step Two Press the Item button.

  • Page 31: Schedule Menu

    Schedule Menu (1 of 1) Note: The Setback / Off DIP switch must be in the setback position in order to have access to the SCHEDULE menu. SETTING THE SCHEDULE A schedule allows the timer to automatically change between two preset events based on the time of day. The schedule divides the day into Occupied and UnOccupied periods.

  • Page 32: Testing The Control

    Testing the Control The control has a built-in test routine that is used to test the main control functions. The control continually monitors the sensors and displays an error message whenever a fault is found. See the following pages for a list of the control’s error messages and possible causes.

  • Page 33: Error Messages

    MAX HEAT The control has a function called Max Heat. In this mode, the control turns on and operates the system up to the maximum set temperatures as long as there is a demand for heat. The control continues to operate in this mode for up to 24 hours or until the Item, Menu or Test button is pressed.
  • Page 34 Error Messages (2 of 2) The control is no longer able to read the boiler supply sensor due to an open circuit. The control will not operate the boiler(s) until the sensor is repaired. Locate and repair the problem as described in the Data Brochure D 070.
  • Page 35 Notes 35 of 36 © 2009 D 263 - 03/09...

  • Page 36: Technical Data

    The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s ALLY EXCLUDE, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES sole discretion: the cost of parts and labor provided by tekmar to repair defects in OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURA- materials and/or workmanship of the defective product;...

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