Installation manual
7
RKHBRD011~Y1
Indoor unit for air to water heat pump system
4PW61218-1C – 2012.06
A
CCESSORIES
Accessories supplied with this unit
(See figure 1)
O
VERVIEW
OF
THE
INDOOR
UNIT
Main components
1.
Air purge valve
Remaining air in the water circuit will be automatically removed
via the air purge valve.
2.
Temperature sensors (thermistors)
Temperature sensors determine the water and refrigerant
temperature at various points in the circuit.
3.
Switch box
The switch box contains the main electronic and electrical parts
of the indoor unit.
4.
Heat exchangers
5.
Refrigerant liquid connection R410A
6.
Refrigerant gas connection R410A
7.
Shut-off valves
The shut-off valves on the water inlet connection and water
outlet connection allow isolation of the indoor unit water circuit
side from the residential water circuit side. This facilitates
draining and filter cleaning of the indoor unit.
8.
Water inlet connection
9.
Water outlet connection
10.
Drain valve
11.
Water filter
The water filter removes dirt from the water to prevent damage
to the pump or blockage of the heat exchanger. The water filter
must be cleaned on a regular base. See "Maintenance activities"
on page 35.
12.
Expansion vessel (12 l)
13.
Manometer
The manometer allows readout of the water pressure in the
water circuit.
14.
Pump
The pump circulates the water in the water circuit.
15.
Pressure relief valve
The pressure relief valve prevents excessive water pressure in
the water circuit by opening at 3 bar and discharging some
water.
16.
Service ports R134a
17.
Compressor
18.
Accumulator
19.
3-way valve (option) (delivered with the RKHTS* domestic hot
water tank)
The motorized 3-way valve controls whether the water outlet is
used for space heating or the domestic hot water tank.
20.
4-way valve
21.
Thermal cut-out
22.
Electronic expansion valve
23.
T-piece (option) (delivered with the RKHTS* domestic hot water
tank)
1
Installation manual
2
Operation manual
3
Unpacking instruction sheet
4
Wiring diagram
5
User interface kit (remote controller, 4 fixing screws, 2 plugs)
6
Screws (2x top plate fixing 4x lifting plate screws)
7
Clamp
8
O-ring (spare part)
9
Grommet (small)
10
Grommet (large)
11
Top plate insulation
12
Lifting plate (for lifting the unit)
13
Flexible water outlet piping
14
Flexible water inlet piping (with manometer)
1
20
19
2 18
7
2 2
4
10
9
14
16
23
17
22 22
11
2
15
4
21
5
12
3
7 8
13
6
