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23
EIOM v2018.04
General for step motor drives:
Probable fault cause on installation:
• Magnet turned the wrong way
• Magnet transmitter incorrectly connected (wrong polarity), see electrical connection;
• Too big a gap between magnet transmitter and magnet;
Probable fault cause in operation:
• Broken belt;
• Belt slipping;
• Stuck wheel;
• The magnet transmitter or magnet is not intact;
6. HEAT EXCHANGERS
6.1 WATER HEATER
The water heaters designed for heating air with fluid as the heat carrier and mounted in the unit.
Water heater sections can be supplied with heat carrier temperature control point RMG. In case of built-in automation, connection of the water
circulator pump and the three-way valve with actuator is designed.
Recommended cable cross-sectional area (mm
2
) for connecting water circulation pump and water valve actuator:
CABLE CONDUCTOR CROSS-SECTIONAL AREA, mm
2
PURPOSE
1.5
Water circulation pump cable
0.5
Water valve actuator cable
NOTE: Water circulation pump must be grounded. Ground wire must be connected to the ground screw at the motor junction box, and the other
end of the wire must be connected to the ground loop of the device.
3-position control signal
• Voltage at Y1: Stem extends - Valve opens
• Voltage at Y2: Stem retracts - Valve closes
• No voltage at Y1 and Y2: Actuator maintains its current position
DC 0...10 V control signal
• The valve opens / closes in proportion to the control signal at Y.
• At DC 0 V, the valve is fully closed.
• When power supply is removed, the actuator maintains its current position.
Mounting water valve actuator
The mounting instructions are enclosed in the product packaging. Assembly is made with the union nut; no tools or adjustments are required. The
actuator must be fitted in position 0 without operating voltage (also refer to actuator manual).
Self-calibration
During commissioning and whenever the operating voltage is switched on, the SSB61 runs a self-calibration routine. (Valve stroke 0 → Max. stroke
→ Setpoint). Never intervene manually in this process.
Manual override
To retain the manually set position, unplug the connecting cable or switch off power and the control signal.
Figure 6.1.1 – Water valve actuator (SSB…) manual override
Figure 6.1.2 – Water valve actuator (SSC…) manual override
(1) – Position indicator in position 0 = CLOSED; (2) – Position indica
-
tor in position 1 = OPEN;
(1) – Position indicator in position 1 = OPEN; (2) – Position indicator
in position 0 = CLOSED
