Hamworthy QAA73.210, Installation, Commissioning And Servicing Instructions

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HAMWORTHY HEATING LTD QAA73.210
Programmable Room Unit
500001305/B
1
1.0 Introduction
The Hamworthy QAA73.210 is a digital multi -
functional room unit for one or 2 heating circuits and
d.h.w. control.
The boiler control LMU64 delivers the outside
temperature and other information to the
QAA73.210 room unit via the OpenTherm
communication interface. Based on the outside
temperature, the room temperature and a number of
other parameters, the interface calculates the
required flow temperature setpoints for one or 2
heating circuits and transmits them to the boiler
control. In addition, the d.h.w. temperature setpoint
is transmitted to the boiler control.
The optimization and weather compensation
functions offer energy savings without sacrificing
comfort. The room sensor required for that purpose
is integrated within the unit.
Features
•
Operating sections (operating levels) based
on ergonomic and functional considerations
•
Clear assignment of basic functions:
•
Operating mode, setpoint adjustment and
occupancy button
•
A number of actual values can be accessed
via the Info button
•
Additional functions can be programmed after
opening the cover
•
Special service level with protected access
•
Every setting or change is displayed and thus
acknowledged
•
Yearly clock with automatic summer - /
wintertime changeover
•
One heating program per heating circuit with
up to 4 heating periods per day can be
selected on an individual basis
•
D.h.w. program with up to 4 heating periods
per day can be selected on an individual
basis
•
Holiday program
•
The heating programs and the d.h.w. program
can be reset to their default settings
•
Programming lock (e.g. for child - proofing)
•
Special mode for setting the parameters of
Siemens boiler control systems
•
Weather - compensated flow temperature
control while giving consideration to the
building ’ s thermal dynamics
•
Weather - compensated flow temperature
control with room compensation
•
Pure room temperature control
•
Effect of room temperature deviation can be
adjusted
•
Optimum start / stop control
•
ECO functions (24 - hour limit switch,
automatic summer / winter changeover)
•
Room temperature switching differential for
limiting the room temperature
•
Adjustable maximum limit of flow temperature
(especially in connection with floor heating
systems)
•
Limitation of the rate of increase of the flow
temperature setpoint
•
Frost protection for the building, frost warning
•
D.h.w. control with release and pre - selection
of setpoint for the boiler controller
•
Anit - legionella function
•
Integrated yearly clock with a reserve of at
least 12 hours
•
Elegant housing made of recyclable plastic
•
Communication with the boiler control via
OpenTherm interface
•
Power supply via OpenTherm interface
Range of Products
•
Boiler Management Unit Premix TOP
LMU64
•
Third party boiler control with OpenTherm
interface Room unit with
OpenTherm interface
QAA73.210
Product Liability
•
When using the products, all requirements
specified under ‘ Technical Data ’ must be
observed
•
The local regulations for electrical installation
must be complied with.