Main Components - Daikin EDLQ036BA6VJU1 Installation Manual

Main components

Hydraulic compartment (door 3)
1
18
17
16
13
15
8
10
3
9
8
14
12
3
11
6
1. Air purge valve
Remaining air in the water circuit will be automatically removed
via the air purge valve.
2. Backup heater
The backup heater consists of an electrical heating element that
will provide additional heating capacity to the water circuit if the
heating capacity of the unit is insufficient due to low outdoor
temperatures, it also protects the external water piping from
freezing during cold periods.
3. Temperature sensors
Four temperature sensors determine the water and refrigerant
temperature at various points in the water circuit.
4. Heat exchanger
Expansion vessel (2.6 gallons (10 l))
5.
Refrigerant liquid connection
6.
7. Refrigerant gas connection
Shut-off valves
8.
The shut-off valves on the water inlet connection and water
outlet connection allow isolation of the unit water circuit side
from the residential water circuit side. This facilitates draining
and filter replacement of the unit.
Water inlet connection
9.
10. Water outlet connection
11. Drain and fill valve
12. Water filter
The water filter removes dirt from the water to prevent damage
to the pump or blockage of the evaporator. The water filter must
be cleaned on a regular base. See "Maintenance and service"
on page 37.
Installation manual
12
13. Manometer
The manometer allows readout of the water pressure in the
water circuit.
14. Flow switch
The flow switch checks the flow in the water circuit and protects
the heat exchanger against freezing and the pump against
damage.
15. Pump
The pump circulates the water in the water circuit.
16. Backup heater thermal protector
The backup heater is equipped with a thermal protector. The
2
thermal protector is activated when the temperature becomes
too high.
17. Backup heater thermal fuse
The backup heater is equipped with a thermal fuse. The thermal
fuse is blown when the temperature becomes too high (higher
2
than the backup heater thermal protector temperature).
3
18. Pressure relief valve
The pressure relief valve prevents excessive water pressure in
5
the water circuit by opening at 43.5 psi (3 bar) and discharging
some water.
4
Functional diagram of hydraulic compartment (door 3)
1 2
7
R11T
t>
3
H O
2
R13T
t>
8
Expansion vessel
1
Manometer
2
Air purge valve
3
Pressure relief valve
4
Backup heater vessel
5
with backup heater
6 Pump
Shut-off valve water
7
outlet
3 4 5 6 7
R12T
t>
R14T
t>
9 10 11 12
Heat exchanger
8
9 Flow switch
Drain/fill valve
10
11 Filter
Shut-off valve water inlet with
12
drain valve
R11T
R12T
Temperature sensors
R13T
R14T
EDLQ036~054BA6VJU1 + EBLQ036~054BA6VJU1
Unit for air to water heat pump system
4PW56182-1