Page 14
attainable cylinder is published. In conjunction with the
published information of the minimum output at
A25/W55 for each heat pump the attainable cylinder
temperature can be found.
The flow rate though the cylinder coil is an important
factor
in
determining
the
achievable
cylinder
temperature. The hydraulic resistance of the coil and
connecting pipe work must be checked to ensure that
the circulation pump pre-installed in the LA MI is able to
achieve the necessary flow rate.
Heat Pump
Cylinder model
45
C achievable
with correct flow
rate
LA 6 MI
(Flow rate 1.0m
3
/h)
ECS125HP-580
Yes
ECS150HP-580
Yes
ECS175HP-580
Yes
ECS210HP-580
Yes
ECS250HP-580
Yes
ECS300HP-580
Yes
LA 9 MI
(Flow rate 1.6m
3
/h)
ECS125HP-580
Yes
ECS150HP-580
Yes
ECS175HP-580
Yes
ECS210HP-580
Yes
ECS250HP-580
Yes
ECS300HP-580
Yes
LA 12 MI
(Flow rate 2.1m
3
/h)
ECS125HP-580
Yes
ECS150HP-580
Yes
ECS175HP-580
Yes
ECS210HP-580
Yes
ECS250HP-580
Yes
ECS300HP-580
Yes
LA 16 MI
(Flow rate 2.8m
3
/h)
ECS125HP-580
Yes
ECS150HP-580
Yes
ECS175HP-580
Yes
ECS210HP-580
Yes
ECS250HP-580
Yes
ECS300HP-580
Yes
Table 8: Cylinders suitable for use with the LA MI range
with an external temperature up to 25°C.
Cylinder volume and reheat
The amount of stored hot water should be adequate to
meet the demands of the property. The installer should
gauge the likely hot water use depending upon the type
of showers, baths and taps installed within a short time
and select an appropriately sized cylinder.
It should be noted that the cylinder reheat times will be
longer with a heat pump compared to a typical gas
boiler. This is because a gas boiler is often drastically
oversized compared to the space heating requirement
whereas a heat pump is sized much closer to the heat
pump. For this reason, it may be necessary for a heat
pump cylinder to be larger than a cylinder installed with
a gas boiler.
Heat pump output
6kW
9kW
12kW
16kW
ECS125HP-580
44
29
22
16
ECS150HP-580
52
35
26
20
ECS175HP-580
61
41
31
23
ECS210HP-580
73
49
37
27
ECS250HP-580
87
58
44
33
ECS300HP-580
105
70
52
39
Table 9: Calculated cylinder reheat time with different heat
pumps
Cylinder replacement
In addition to the instructions supplied with the cylinder,
when planning on replacing an old vented cylinder for a
new unvented stainless steel cylinder it is important
check the following:
The water main is capable of supply adequate
pressure and flow rate at all times of the day.
The fittings such as taps and valves are
suitable for the new higher pressure system.
Selecting
and
controlling
the
DHW
temperature
The heat pump controller monitors the temperature in
the DHW cylinder via a sensor and decides when to
work in hot water mode. The user can set the time of
DHW production and also the temperature of DHW
product using the wall mountable controller.
It is important that the customer understands
that the maximum flow temperature out of the
heat pump is higher than the maximum
attainable temperature in the cylinder.
If a heat pump is being installed on to an
existing property it is likely that the old hot
water cylinder will have to be replaced with a
new one with a larger coil.
Summary of Contents for LA 12 MI
Page 35: ...Page 34 Package 1 and 2 Plumbing Schematic...
Page 36: ......
Page 40: ...Page 39 CE declaration of conformity...
Page 41: ...Page 40 LA 6 MI performance...
Page 42: ...Page 41 LA 6 MI continued...
Page 43: ...Page 42 LA 9 MI performance...
Page 44: ...Page 43 LA 9 MI performance continued...
Page 45: ...Page 44 LA 12 MI performance...
Page 46: ...Page 45 LA 12 MI performance continued...
Page 47: ...Page 46 LA 16 MI performance...
Page 48: ...Page 47 LA 16 MI performance continued...
Page 49: ...Page 48 Product Dimensions LA 6 MI and LA 9 MI...
Page 50: ...Page 49 Product Dimensions LA 12 MI and LA 16 MI...
Page 61: ...Page 60 Information for DHW cylinder with buffer ECS125HP 580...
Page 62: ...Page 61 Information for DHW cylinder with buffer ECS150HP 75 580...
Page 63: ...Page 62 Information for DHW cylinder with buffer ECS210HP 75 580...
