Technical data

Table Of Contents
COMMISSIONING
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If the External Unit is powered ON first, its controller tries to establish
the communication with the Hybrid Manager but until the Hybrid
Manager is powered ON, the communication cannot be established.
If this status continues for a period of time, the External Unit judges this
status as a ‘communication error’ and this error can not be reset until the
External Unit is powered OFF once.
The same thing can happen when the Hybrid Manager is powered on first
and the External Unit can not be powered on within a certain period of
time.
In order to avoid this ‘false’ communication error, SW8-3 is available on
the External Unit controller circuit board. If switch SW8-3 is set to ON,
the Hybrid Manager/External Unit communication error is ignored and
the External Unit keeps waiting until the Hybrid Manager is powered ON
and responds to the External Unit.
In other words, even though it could take a long time from when the
External Unit is powered ON until the Hybrid Manager is powered ON,
the communication error is never detected as far as SW8-3 is set ON.
If SW8-3 is NOT set ON, the Hybrid Manager/External Unit
communication error will be detected in 3 minutes at the earliest case.
If you are sure that both the Hybrid Manager and the External unit
can be powered on within 3 minutes, you do not need to set SW8-3
ON.
If the communication error is caused not only by this power supply issue
but by electrical noise etc, the error can be detected by the indoor board
side even if SW8-3 is ON and the error code can be displayed on the
FW200.
6.2.9 ADJUSTING THE HYBRID MANAGER CIRCULATING PUMP
IN THE HYBRID MANAGER
The Hybrid manager circulating pump in the hybrid manager is set
subject to the system configuration.
ADJUSTING THE HYBRID MANAGER CIRCULATING PUMP CURVE
The Hybrid manager circulating pump can be set up in different ways:
I Constant pressure curve, speed stage I
II Constant pressure curve, speed stage II
III Constant pressure curve, speed stage III.
Select and set the speed stage in line with the procedures described
in section 6.2.9
Press arrow button [1] on the Hybrid manager circulating pump to
select the required stage.
Fig. 47 Setting the speed stage at the HE pump
6.2.10 SYSTEM WITH SERIES BUFFER TANK
Does the installation have a single or a multi heating circuit with a serial
buffer tank? As shown in Fig. 7 8, 9 and 10.
1. The pump in the accessory box should be set on Constant Speed III,II
or I.
The pump should be set on the lowest setting which matches P the
Total System Pressure Drop.
2. The Available Pump Head, see figure 49 (Available head), must
overcome A the Heating Circuit Resistance and B the resistance of any
Additional Pipe work between the Accessory Box and the heating
system
3. What is the maximum condensing boiler heat output Q for the heating
system in kW?
4. What is T the required design Delta T (Flow temperature - Return
temperature) across the system?
5. What is V the required system flow rate to achieve T the design Delta
T at the maximum CH heating output Q?
V = 14.3 x Q /T
6. What is the pressure drop of the heating circuit at flow rate F [l/min]
in mbar?
7. What is the equivalent length of additional 22mm pipe work between
the Accessory Box and the heating system in metres?
8. What is B the pressure drop of the equivalent length of additional pipe
work in mbar? - refer to figure 48, Pressure drop/Flow rate
9. Calculate P the Total System Pressure Drop that the pump needs to
overcome, P = A + B
10.From Available Hydraulic Pump Head Chart, refer to figure 49, select
the closest pump setting which provides P the Total pressure at F the
system flow rate.
11.If none of the pump curves match the requirement it may be
necessary to reduced B the equivalent length of additional pipe work
Constant pressure curve, speed stage III is the standard
setting. Pump must be used in fixed speed mode only.
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Set the Hybrid manager circulating pump to the lowest
speed stage possible subject to system pressure drop.
We recommend speed stage II or III.
NOTICE: The typical design Delta T is 20K
NOTICE: The equivalent length of pipe work includes all
additional pipe work bends (an elbow is equivalent to
1m length of pipe work)