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Boiler Control 270
The tekmar Boiler Control 270 can control the supply water temperature from a single modulating boiler based on outdoor temperature
or domestic hot water requirements. A large easy to read display provides current system temperatures and operating status.
Additional functions include:
•
Outdoor Reset
•
Installer and Advanced access levels
•
Primary pump output
•
Pump exercising
•
Pump purging
•
Boiler demand for space heating loads
Boiler Control 270
One Modulating Boiler & DHW
Input
Boiler
Demand
Input
DHW
Demand
Output
Primary
Pump
Menu
Item
1
2
3
4 5
6
7 8
DHW
Boil
Com
DHW
Prim
Power
Dem
Dem
Dem
P1
L
N
Pmp/Vlv
OR
Input
Output
115 V (ac)
DHW Pump or
Power Supply
DHW Valve
•
DHW demand for domestic hot water loads
•
Optional indoor sensor for room air temperature control
•
Test sequence to ensure proper component operation
•
Setback input for energy savings
•
CSA C US certified
Advanced
Boiler Demand
DHW Demand
Installer
Modulation
DHW Priority Override
Made in Canada by
tekmar Control Systems Ltd.
tektra 969-03
Power
Relays
Demands
Signal wiring must be rated at least 300 V.
Do not apply power
9 10
11
12 13 14 15 16 17 18
Boiler
Mod V(dc)
Com
Pmp P2
+
--
M
Output
Output
Pump
Boiler
1 of 24
Off
Exercise
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 Boil
Out Com Indr
Sw
Input
Input
tekmar
Universal Sensor
Timer
Included
© 2010
D 270
08/10
Input
Indoor Sensor
Optional
Input
Outdoor
Sensor
Included
D 270 - 08/10
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Related Manuals for Tekmar D 270
Summary of Contents for Tekmar D 270
- Page 1 Boiler Control 270 08/10 The tekmar Boiler Control 270 can control the supply water temperature from a single modulating boiler based on outdoor temperature or domestic hot water requirements. A large easy to read display provides current system temperatures and operating status.
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Page 2: Table Of Contents
Additional information can be gained by observing the Status field of the LCD. The status field will indicate which of the control’s outputs are currently active. Most symbols in the status field are only visible when the VIEW menu is selected. © 2010 D 270 - 08/10 2 of 24... -
Page 3: Display
Displays the control operation as indicated mode. by the text. UnOccupied Schedule Modulating Output Scale Displays when the control is in unoccupied Displays the total modulation output level of mode. the boiler. 3 of 24 © 2010 D 270 - 08/10... -
Page 4: Sequence Of Operation
When in the unoccupied mode, the UNOCC segment is displayed in the LCD. The control adjusts the supply water temperature based on the UNOCC settings made in the control. UnOccupied Switch © 2010 D 270 - 08/10 4 of 24... -
Page 5: Section B: Boiler Operation
The Fire Delay is the time delay that occurs between the time that the control closes a stage contact to fire a stage and the burner fires for that stage. Fire Delay Time 5 of 24 © 2010 D 270 - 08/10... - Page 6 270 control. The Maximum Modulation Range Range Modulation Maximum setting limits the control output range in order to match the boiler’s input Input Signal range. 2 V (dc) 2 V (dc) © 2010 D 270 - 08/10 6 of 24...
- Page 7 Auto Differential If the Auto Differential is selected, the control automatically determines Off the best differential as the load changes. This reduces potential short cycling during light load conditions. Differential Time 7 of 24 © 2010 D 270 - 08/10...
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Page 8: Section C: Pump Operation
If a warm outdoor design temperature is selected, the boiler supply temperature rises rapidly as the outdoor temperature drops. © 2010 D 270 - 08/10 8 of 24... - Page 9 This type of radiant system has a relatively low thermal mass and responds faster than a high mass system. 9 of 24 © 2010 D 270 - 08/10...
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Page 10: Section E: Dhw Operation
DHW tank calls for heat. This allows for a faster recovery of the DHW tank. © 2010 D 270 - 08/10 10 of 24... - Page 11 DHW Pmp / Vlv contact. During demands, the DHW Pmp / Vlv contact must remove any power to all space heating Increasing Air Temperature zone valves or zone pumps. Outdoor Air Temperature 11 of 24 © 2010 D 270 - 08/10...
- Page 12 (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. © 2010 D 270 - 08/10 12 of 24...
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Page 13: 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 270 includes: One Boiler Control 270, One Outdoor Sensor 070, One Universal Sensor 082, Data Brochures D 270, D 070, D 001, Application Brochure A 270. - Page 14 Since this is an isolated contact, it may switch a voltage between 24 V (ac) and 230 V (ac). © 2010 D 270 - 08/10 14 of 24...
- Page 15 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 (13 and 14). When these two terminals are shorted together, the control registers an unoccupied (UNOCC) signal.
- Page 16 24 to 230 V (ac) to any installation or troubleshooting information supplied with these devices. If the DHW pump or valve operates correctly, disconnect the power and remove the jumper. © 2010 D 270 - 08/10 16 of 24...
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Page 17: Dip Switch Settings
The Off / Exercise DIP switch selects whether or not the control is to exercise the primary pump and boiler pumps. If the DIP switch is set to Exercise, the pumps are operated for 10 seconds after every three days of inactivity. Installer Exercise 17 of 24 © 2010 D 270 - 08/10... -
Page 18: Control Settings
Boiler Hours The total running time of the boiler since this item was last cleared. To clear this item, press the button 0 to 1999 hr simultaneously while viewing this item. © 2010 D 270 - 08/10 18 of 24... -
Page 19: Adjust Menu
Motor Speed The amount of time required for the modulat- 10 to 230 seconds ing actuating motor to fully open the gas valve or operate the Default = 30 fan speed from a stopped position to full speed. 19 of 24 © 2010 D 270 - 08/10... - Page 20 (5 second increments) Default = 0:20 min removed. The units of measure that all of the temperatures are to be °F,°C displayed in by the control. Default = °F © 2010 D 270 - 08/10 20 of 24...
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Page 21: Testing The Control
– If DHW MODE is set to 3 or 4, the DHW Pmp / Vlv contact is closed and the primary pump contact remains closed. Step 7 – After the test sequence is completed, the control resumes its normal operation. 21 of 24 © 2010 D 270 - 08/10... - Page 22 3) To cancel the Max Heat mode, press the Item, Menu, or Test button. 4) Once the Max Heat mode has either ended or is cancelled, the control resumes normal operation. © 2010 D 270 - 08/10 22 of 24...
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Page 23: Error Messages
Data Brochure D 074. To clear the error message from the control after the sensor has been repaired, press either the Menu or Item button. 23 of 24 © 2010 D 270 - 08/10... -
Page 24: 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;...