Daikin EHVH04SU18CB6W — руководство по установке и обслуживанию системы отопления [41/108]

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Daikin EHVH04SU18CB6W [41/108] Installation
7 Installation
Installer reference guide
41
ERLQ004~008CA + EHVH04+08SU18+26CB6W
Daikin Altherma – Low temperature split
4P449978-1 – 2016.06
7.8.5 To connect the pressure relief valve to the
drain
INFORMATION
Heating of the domestic hot water tank causes water to
expand. As a result, the water pressure inside the tank can
rise above the tank design pressure. Also the field
installation (piping, tapping points, etc.) connected to the
tank can then become subjected to this high pressure. To
prevent overpressure, a pressure relieve valve is factory-
installed on top of the domestic hot water tank. The
prevention depends on the correct operation of the
pressure relief valve. If it does NOT function correctly,
overpressure will deform the tank and water leakage may
occur. To confirm correct operation, regular maintenance is
required.
The blow out of the pressure relief valve is coming out of the
backside of the unit.
a
a Pressure relief blow-out
The blow out should be connected to an appropriate drain according
to the applicable legislation. It is recommended to use a tundish.
7.8.6 To fill the water circuit
1 Connect the water supply hose to the fill valve.
2 Open the fill valve.
3 Make sure that the automatic air purge valve is open (at least 2
turns).
4 Fill the circuit with water until the manometer indicates a
pressure of ±2.0bar.
5 Purge as much air as possible from the water circuit.
6 Close the fill valve.
7 Disconnect the water supply hose from the fill valve.
NOTICE
The water pressure indicated on the manometer will vary
depending on the water temperature (higher pressure at
higher water temperature).
However, at all times water pressure shall remain above
1bar to avoid air entering the circuit.
7.8.7 To fill the domestic hot water tank
1 Open every hot water tap in turn to purge air from the system
pipe work.
2 Open the cold water supply valve.
3 Close all water taps after all air is purged.
4 Check for water leaks.
5 Manually operate the pressure relief valve of the domestic hot
water tank to ensure a free water flow through the discharge
pipe.
NOTICE
To operate the system, the domestic hot water tank needs
to be filled completely. Turning on the system when the
tank is not full can damage the integrated booster heater
and cause electrical errors.
7.8.8 To insulate the water piping
The piping in the complete water circuit MUST be insulated to
prevent condensation and reduction of the heating capacity.
If the temperature is higher than 30°C and the humidity is higher
than RH80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
7.9 Connecting the electrical wiring
7.9.1 About connecting the electrical wiring
Before connecting the electrical wiring
Make sure:
The refrigerant piping is connected and checked
The water piping is connected
Typical workflow
Connecting the electrical wiring typically consists of the following
stages:
1 Making sure the power supply system complies with the
electrical specifications of the heat pump.
2 Connecting the electrical wiring to the outdoor unit.
3 Connecting the electrical wiring to the indoor unit.
4 Connecting the main power supply.
5 Connecting the backup heater power supply.
6 Connecting the user interface.
7 Connecting the shut–off valves.
8 Connecting the electrical meters.
9 Connecting the domestic hot water pump.
10 Connecting the alarm output.
11 Connecting the space heating ON/OFF output.
12 Connecting the changeover to an external heat source.
13 Connecting the power consumption digital inputs.
14 Connecting the safety thermostat.
15 Connecting the booster heater power supply.
7.9.2 About electrical compliance
Only for indoor units
See "7.9.8 To connect the backup heater power supply" on
page44.

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