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TELEPHONE CONTROLLED THERMOSTAT
ASSEMBLY
IMPORTANT
MOUNT ALL COMPONENTS AGAINST THE P.C.B.
USE A SMALL SOLDERING IRON OF MAX. 40W
USE THIN (1mm) SOLDERING TIN DO NOT USE SOLDERING GREASE!
CARELESS ASSEMBLY WILL UNDOUBTEDLY LEAD TO PROBLEMS
Mount the components in the order indicated in the separate parts list. The parts marked
with (!) require special attention in the assembly instructions
1.
Jumpers
2.
1/4 W resistors, horizontally.
3.
Metal film resistors, horizontally.
4.
Diodes. Watch the polarity!
5.
Zener diodes. Watch the polarity!
6.
IC sockets.
7.
1/4 W resistors, vertically.
8.
Metal film resistors, vertically.
9.
Capacitors.
10. Electrolytic capacitors. Watch the polarity!
11. Rectifier bridges. Watch the polarity!
12. Transistors. Mount T5 so that its metal side is directed towards C2.
13. Temperature sensor. This can be mounted in two different places; when using the
separate housing, it is best to mount the sensor close to R31.
14. Surge protection. Bend the connection wires as indicated on the diagram.
15. Relays.
16. Screw connectors.
17. Crystal.
18. Voltage regulator. Mount this regulator so that its back side is directed towards
TRAFO2.
19. LEDs. If you are planning on mounting the PCB in the separate Velleman housing,
the LEDs should be mounted on distance holders (see diagram).
20. Trimmer potentiometers. For the trimmers RV2 and RV3, a shaft should be fitted at
the same time as the knobs; when using the separate housing, check the height and
make sure that the marker coincides with the markings on the front panel.
21. Isolating transformer.
22. Supply transformer.
23. PCB pins for mounting push-button SW1.
24. Push-button; when using the separate housing, mount this button as indicated on the
diagram and make the connection between the two PCB pins, check the height and
remove the screw.
25. Mount the ICs in their sockets. Check the position of the notch.
7
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