Application Brochure

System Operation & Specifications
Technical Data
A 153-1
tekmar Control Systems Ltd., Canada
tekmar Control Systems, Inc., U.S.A.
Head Office: 5100 Silver Star Road
Vernon, B.C. Canada V1B 3K4
Tel. [phone] Fax. [phone]
Product design, software and literature are Copyright © 2008 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
Control Systems
The Mixing Setpoint Control 153 controls a 4-way mixing valve in order to maintain a preset mixed supply temperature. With the addition
of the optional Universal Sensor 071 (S2) on the boiler return, the 153 also provides Boiler Return Protection.
Piping and Heat Source Details The system is piped in a primary - secondary arrangement using a 4-way mixing valve. The boiler
and the boiler loop pump (P1) are controlled by the boiler's control package. The system pump (P2) operates continuously providing
flow through the system.
Mixing Operation The 153 modulates the mixing valve using a Floating Action Output. The installer / operator is required to set the
Supply
temperature,
Throttling
range and
Return
temperature limits using the digital display in the control. With this information, the
control modulates the mixing valve in order to maintain the desired setpoint.
Boiler Protection As the boiler return temperature approaches the
Return
temperature setting, the 153 begins closing the valve in
order to limit the amount of cool water returning to the boiler. In this situation, the protection of the boiler takes priority over maintaining
the supply temperature.
Additional Functions Additional control functions are listed in the table in the Setpoint Controls section of the Product Catalog I 000.
All specifications are subject to change without notice.
Printed in Canada. A 153-1 - 12/08.
Mixing Setpoint Control 153
Floating
Literature — A 153's, D 153, D 001, D 070
Control — Microprocessor control; This is not a safety (limit) control.
Packaged weight — 0.66 lb. (300 g), Enclosure C, PVC plastic
Dimensions — 4-3/4” H x 2-7/8” W x 7/8” D (120 x 74 x 22 mm)
Approvals —
CSA C US, CSA 22.2 No 24 and UL 873, meets class B: ICES & FCC Part 15
Ambient conditions — Indoor use only, -20 to 120°F (-30 to 50°C), < 90% RH non-condensing.
Power supply —
24 V (ac) ±10%, 50/60 Hz, 3 VA or 24 V (dc) ± 10%, 0.03 A
Relays — 240 V (ac) 10 A, 1/3 hp
Sensors — NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
included: Universal Sensor 071
optional: Universal Sensor 071
Programmed settings — Ten year memory backup
Control accuracy — ±0.5°F (±0.3°C) with up to 500 feet (150 m) of 18 AWG wire to sensors.
Temperature display
— -85 to 302°F (-65 to 150°C)
Supply (1) Setpoint
— -40 to 239°F (-40 to 115°C)
Throttling Range
— 16 to 66°F (9 to 37°C)
Boiler Return (2)
— -40 to 239°F (-40 to 115°C)
Temperature display
— Fahrenheit / Celsius
Mixing Setpoint
Control 153
Floating Action
1
Supply (1)
Throttling
Return (2)
PRGM
FC
Item
2
5
Cls
Mix
6
7
8
Com
Sen
Sup
Sen
Ret
Sen
O
C
3
4
C—
R+
Pwr
Mix
Opn
Mix
1
2
Power
No Power
Date Code
Meets Class B:
Canadian ICES
FCC Part 15
Made in Canada
tektra 906-07
Power 24 V (ac) ± 10% 50/60 Hz 3 VA
24 V (dc) ± 10% 0.03 A
Relay 240 V (ac) 10 A 1/3 hp
Signal wiring must be
rated at least 300 V
H1096F