Ideal Heating Logic Air DHW IDEPLUHP180DUOPPSZ, Установка и обслуживание, Страница: 46 / 94

Section 5 - Commissioning
COMMISSIONING
46 Installation and Maintenance
5.2.2.3 Antifreeze Valves
Ø M 1”1/4
Figure 45. Typical Antifreeze Valve
Installation
Refer to Antifreeze valve manufacturers installation instructions.
Below is general guidance on the installation requirements
To achieve correct flow through the device, the valve must be
installed in the vertical position as depicted. It must be free from
obstructions to enable servicing.
The antifreeze valves must be installed outside, in the coldest
part of the system that is at risk of freezing.
We recommend installing the antifreeze valves on both pipes
(flow and return). Refer to Figure 46.
They must not be placed close to heat sources which could
interfere with proper function.
Leave at least 15 cm clearance from the ground so the block
of ice that may form below will not prevent the safe operation
of the valve. Keep a distance of at least 10 cm between the
antifreeze valves.
In accordance with applicable regulations, the safety relief valve
drain must be channelled using suitable pipes.
For the device to work properly, keep the system pressurised at
all times, even when draining the anti-freeze valve.
Do not make any trap connections. If the shape of the
connection pipe has the potential to create a trap effect, part
of the pipe will not be able to drain and frost protection will no
longer be guaranteed.
When installed outdoors, the anti-freeze valve must be
protected from rain, snow and direct sunlight.
Figure 46. Antifreeze Installation Recommendations
5.2.2.4 Glycol Antifreeze Treatment
Ideal Heating recommend dosing the system with a suitable
Inhibitor as a minimum. If propylene glycol is used for Frost
Protection a combined Propylene Glycol, Biocide and Inhibitor
MUST be used in accordance with BS 7593:2019.
ⓘ
IMPORTANT: When dosing the system with any
product, the use of fill and flush valves in conjunction
with a fill and flush station is recommended to make sure
the concentration and mixing is thorough and avoid the
potential for hydrostatic locking of the system.
ᘐ
CAUTION: The Tables below are for guidance only,
consultant the glycol providers instruction for exact
dosage and recommendations for use.
The values in
Table 11
illustrates the freezing point of the water
when dosed with propylene glycol mixtures.
Table 11 Glycol Concentration vs Expected Min. Outdoor Temp.
Freezing Point
Propylene Glycol Solution (%) 0 10 20 30 40 50
Temperature (°C) 0 -3 -8 -14 -22 -34
4 kW System
Water % Propylene glycol volume in water
100% 10 15 20 25 30 35 40 45 50
Heating Capacity kW 4.0 3.92 3.89 3.84 3.80 3.74 3.68 3.58 3.52 3.40
Reduction Fac 1.0 0.980 0.973 0.960 0.950 0.935 0.919 0.895 0.880 0.850
5 kW System
Water % Propylene glycol volume in water
100% 10 15 20 25 30 35 40 45 50
Heating Capacity kW 5.0 4.90 4.86 4.80 4.75 4.68 4.60 4.48 4.40 4.25
Reduction Factor 1.0 0.980 0.973 0.960 0.950 0.935 0.919 0.895 0.880 0.850
8 kW System
Water % Propylene glycol volume in water
100% 10 15 20 25 30 35 40 45 50
Heating Capacity kW 8.0 7.84 7.78 7.68 7.60 7.48 7.35 7.16 7.04 6.80
Reduction Factor 1.0 0.980 0.973 0.960 0.950 0.935 0.919 0.895 0.880 0.850
10 kW System
Water % Propylene glycol volume in water
100% 10 15 20 25 30 35 40 45 50
Heating Capacity kW 10.0 9.80 9.11 9.00 8.91 8.77 8.62 8.39 8.25 7.97
Reduction Factor 1.0 0.980 0.911 0.900 0.891 0.877 0.862 0.839 0.825 0.797
The below values in table Table 12 illustrates the heating capacity reduction when dosed with propylene glycol and whilst
maintaining nominal flow rates.
Table 12 Glycol Concentration vs Performance