INSTALLATION
17 PUMP SPECIFICATION
The boiler is fitted with a Grundfos UP 25/55 circulating pump, wich provides circulation through the boiler heat exchanger.
Some pump pressure remains available for the system and is shown on the graphs below.
If this pressure is not sufficient an additional pump to overcome system resistance must be fitted. (see frames 3 & 4 for pump
positions)
Fig. 17.1 Automatic air-vent.
Central heating circuit
The connections for the return pipe and the flow pipe of the
central heating circuit are located at the bottom rightside of
the unit. The return pipe has a blue mark, the supply pipe a
red mark. It is recommended to connect the unit to the pipe
system by means of valves.
If applicable select the size of the expansion vessel,
depending on the central heating water temperature, the total
water volume of the installation and the static water pressure.
The boiler has been equipped with an automatic air-vent.
This vent is located in the left top side wall of the heat
exchanger. (Refer to Fig. 17.1).
A pressure safety device is necessary, too. The pressure
safety device has to be installed in the flow pipe.
In installations at which all radiators have been provided with
thermostatic radiator valves, you need to ensure that the
water circulation through the unit is guaranteed. This can be
done by means of a differential pressure valve, that is
installed between the supply pipe and the return pipe at
about 6 meters distance from the unit. The pipe diameter has
to be at least 22 mm for an installed capacity of 22 and 30
kW and 28 mm for an installed capacity of 42 kW or over.
(Refer to Fig 17.2).
The Ideal Maximiser is not suited for installations with a
natural water circulation (gravity installations).
Important information:
Corrosion in the central heating system depends on:
-
the water quality,
-
not flushing old installations when installing a new boiler,
-
intrusion of oxygen through leakages or open valves,
-
diffusion in synthetic (floor) heating systems.
The changing temperature and pressure in the system can
also accelerate the corrosion.
If the Ideal Maximiser is to be installed in an existing installa-
tion, the central heating water has to be checked in advance.
If this water is contaminated, the whole installation has to be
drained and flushed before the unit can be mounted and the
system filled.
Do not use system additives.
(refer to frame 5, page 6)
Fig. 17.2 Schematic diagram of installation, with remote
shunt pipe and differential pressure valve.
2
3
1
4
1. Valves
2. Relief valve
3. Expansion vessel
4. Differential pressure valve
211084
216034 UK
459141
200 400
0
600 800
1600
1000 1200 1400
0
100
200
300
400
600
litre/hour
mbar
UP
UP25-55
25-55
1800
500
∆
T=20K
T=20K
Availiable for
installation
lift pump
200 400
0
600 800
1600
1000 1200 1400
0
100
200
300
400
600
litre/hour
mbar
UP
UP25-55
25-55
1800
500
∆
T=20K
T=20K
Availiable for
installation
lift pump
20002200 24002600
Maximiser
Maximiser SE42
SE42
Maximiser
Maximiser SE65
SE65
∆
T=25K
T=25K
Maximiser SE
- Installation
16
