Hamworthy QAA73.210, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD QAA73.210
Programmable Room Unit
500001305/B
12
5.0 Operational fault finding
No display on the room unit:
•
Is the heating plant's main switch turned on?
•
Are the fuses in order?
•
Check the wiring
Room unit displays a wrong time of day or a
wrong date:
•
Set the right time of day, the right date and the
year on the room unit if the QAA73.210 is the
clock master
•
Set the correct time of day and the date on the
clock master (if present)
Boiler control does not switch on
•
Does boiler control really have to operate?
•
Press boiler control ’ s lock - out reset button
•
Check the control thermostat (TR) and the
manual reset safety limit thermostat (STB)
•
Check wiring and fuse of boiler control
•
Check the communication link to boiler control
The room temperature does not agree with the
required temperature level:
•
Does the room temperature setpoint agree with
the required temperature level?
•
Is the required operating mode indicated?
•
Are weekday, time of day and the displayed
heating
program correct?
(Info displays)
•
Has the heating curve slope been correctly set?
•
Check wiring of outside sensor
•
Has the ” Nominal room temperature setpoint ”
with the ” Parallel displacement of the heating
curve ” been calibrated based on the effective
room temperature?
•
Check boiler control
D.h.w. is not being heated:
•
Has the button for d.h.w. heating been pressed?
•
Check setpoint of the d.h.w. temperature
•
Check d.h.w. function of boiler control
6.0 Technical Data
OpenTherm Interface:
Terminals 2 - wire (interchangeable
Cable length max. 50m
Cable resistance max. 2 x 5 Ω
Power consumption 20mW (typically)
Safety class III to EN 60 730
when mounted in
compliance with
regulations
Degree of Protection IP 20 to EN 60529
Contamination Environment to EN 60730
Operation EN 60721 - 3 - 3 Class 3K 5
•
Temperatures 0....50°C
•
Humidity < 85 % r.h.
Transport EN 60721 - 3 - 2 Class 2K 3
•
Temperatures - 25... 70°C
•
Humidity < 95 % r.h.
Storage EN 60721 - 3 - 1 Class 1K 3
•
Temperatures - 20... 70°C
•
Humidity < 95 % r.h.
CE Conformity
EMC directive 2004/108/EC
- Immunity EN 60730 - 1
- Emmissions EN 60730 - 1
Reduction of
Hazardous substances 2002/95/EC
Measuring Range 0... 50°C
According to EN12098:
Range 15...25°C within tol. Of 1.3K
Range 0...15°C
or 25...50°C within tol. Of 1.6K
Resolution 1/10K
Back - up of Time Switch min. 12h
Software Class A to EN 60 730
Weight approx 0.115kg