Removing The Cover From The Power Supply Pcb; Routing The Cables In The Product; Establishing The Power Supply, 1~/230V - Vaillant uniTOWER plus Operating Instructions Manual

Option 2: Disconnect the power supply with con-
tactor
▶
Upstream of the indoor unit, install a contactor into the
power supply for the low tariff.
▶
Install a 2-pole control cable. Connect the control output
for the ripple control receiver to the control input for the
contactor.
▶
Connect the power supply that is switched by the con-
tactor to X300.
Note
When the energy supply (for the compressor
or electric back-up heater) is switched off via
the tariff contactor, S21 is not connected.
6.5 Removing the cover from the power supply
PCB
B
2×1
A
1. Remove the front casing. (→ Section 4.10.1)
2. Remove both screws.
3. Pull the cover for the power supply PCB forwards and
out.
6.6

Routing the cables in the product

eBUS
A
B
1. If required, remove the left-hand side casing.
2. Guide the power supply cable (1) and other connection
cables (24 V/eBUS) (2) along the left-hand side casing
in the product.
0020291525_04 Installation and maintenance instructions
1
2
3. Guide the power supply cables through the strain re-
liefs and to the terminals on the power supply PCB.
4. Connect the power supply cable to the corresponding
terminals.
5. Secure the power supply cable in the strain reliefs.
6.7

Establishing the power supply, 1~/230V

▶
Determine the type of connection:
Case
Energy supply company lockout not
provided
Energy supply company lockout
provided, shutdown via connection
S21
Energy supply company lockout
provided, shutdown via partition
6.7.1 1~/230V single power supply
X311 X310
1. Note the specifications on the sticker on the electronics
box.
2. Install a disconnector for the product.
3. Use the enclosed 3-pole power supply cable.
4. Connect the power supply cable to L1, N, PE.
5. Use the strain relief clamp to secure the cable in place.
1
Connection type
Single power supply
Dual power supply
X300
33