Hamworthy QAA73.210, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD QAA73.210
Programmable Room Unit
500001305/B
27
8.0 Single Heating Circuit with Domestic Hot
Water
Description of system type
All circuit pumps and temperature control is
achieved via the boiler with the QAA73 room
controller. Time clock and climate settings are
programmed within the QAA73 room controller as
part of the commissioning procedure.
The boiler controller, LMU64, will set the primary
temperature according to the highest heat
requirement, ie, if the D.H.W. cylinder requires a
higher temperature than the heating circuit the
primary temperature will be set to this. During this
period the heating circuit pump will be switched off
to prevent overheating of the space.
Hardware required
1 Boiler incorporating LMU64 boiler
management unit.
2 Room programmer QAA73. Programmable
room unit kit including wiring terminal blocks for
boiler LMU wiring connection, part number
563605337.
3 External air sensor QAC34. Part number
533901457.
4 D.H.W. Cylinder sensor QAZ21. Sensor kit
including wiring terminal blocks for boiler LMU wiring
connection and immersion pocket, part number
563605338.
Frost protection
The building is protected for internal temperature
using the QAA73 room programmer temperature
sensor.
The boiler is internally protected for water
temperature using the LMU64 temperature sensors.
Also the D.H.W. cylinder is protected via the signal
received from the cylinder sensor. Both boiler and
hot water cylinder frost protection settings are pre -
programmed in the boiler controls, not the QAA73
programmable room unit.
Primary circuit pump
The primary circuit pump is designated Q8. this
must be connected to the boiler at terminals ‘ X2 - 03,
Q8 primary circuit pump contactor ’. The control
signal is a start stop control that must be wired via
suitable contactors and hand/auto switches for
maintenance purposes.
Flow rate and resistance for the primary pump must
be sized in accordance with the flow requirements
for the boiler and the resistance requirements of
both the boiler and the primary circuit.
Note: The control does not incorporate a facility for
switching duty/standby pumps. If required this must
be facilitated externally to these controls.
Heating circuit pump
The heating pump is designated Q1. This must be
connected to the boiler at terminals ‘ X2 - 02, Q1
heating circuit pump contactor ’. The control signal is
a start stop control that must be wired via suitable
contactors and hand/auto switches for maintenance
purposes.
Flow rate and resistance for the heating pump must
be sized in accordance with the flow requirements
for the heating circuit and the resistance
requirements of the heating circuit.
Note: The control does not incorporate a facility for
switching duty/standby pumps. If required this must
be facilitated externally to these controls.
D.H.W. Circuit pump
The D.H.W. circuit pump is designated Q3. This
must be connected to the boiler at terminals ‘ X2 - 04,
Q3 DHW cylinder pump contactor ’. The control
signal is a start stop control that must be wired via
suitable contactors and hand/auto switches for
maintenance purposes.
Flow rate and resistance for the D.H.W. circuit pump
must be sized in accordance with the flow
requirements for the cylinder and the resistance
requirements of the cylinder and pipework circuit.
Note: The control does not incorporate a facility for
switching duty/standby pumps. If required this must
be facilitated externally to these controls.
Room programmer
The single room programmer, QAA73, must be
installed in the location most suitable for providing
accurate space heating comfort control with the first
heating circuit area (circuit using pump Q1). This
must be connected to the boiler at terminals ‘ X10 -
01, room unit QAA73 ’.
Wiring should be completed using a 1.5mm² twisted
pair shielded cable run separately to any mains
cables to prevent electrical interference.
External air sensor
This must be installed on a North facing wall to
prevent solar heating of the sensor and away from
heat emitting items such as ventilation outlets.
Connection is directly to the boiler at terminals ‘ X10 -
06, external air sensor QAC34 ’. Wiring should be
completed using a 1.5mm² twisted pair shielded
cable, run separately to any mains cables to prevent
electrical interference. For further details regarding
the sensor specification and fitting requirements