External Connections On The Heat Pump - Operating Mode A - IVT Optima 1000 Assembly, Commissioning And Maintenance Manual

External connections on the heat pump - operating mode A

Power supply: Connect to terminals L1, L2, L3, N and PE. An alarm
triggers if phases are connected wrongly.
Mixing valve on the heating circuit: When a second heat curve with
mixing valve is used, the mixing valve is connected to terminal SV1.
P1, external main pump in the heating system: Must always be
connected. Connect to terminal P1.
P2, heat carrier pump: Must always be connected. Connect to
terminal P2.
Return sensor radiator T1 (GT1): Must always be connected.
Connect to terminal GT1.
Outdoor sensor T2 (GT2): Must always be connected. Connect to
terminal GT2.
Hot water sensor T3 (GT3): Connected if the heat pump is to
produce hot water. Connect to terminal GT3 X.
Mixing valve sensor T4 (GT4): Connected if the mixing valve for the
second heat curve is used. Connect to terminal GT4.
Room sensor T5 (GT5): Connected if room sensor influence is
required. Connect to terminal block GT5 on the terminal card. The
alarm lamp in the room sensor is connected to the terminal block
ALARM LED.
Connection of electric cassette additional heat
- operating mode A
If the additional heat is an electric cassette it is connected in the following
way: Fit the coil on help relay HR to N and L on contact T2. The electric
cassette's on/off is connected to the help relay terminals 11 and 14.
Concerns both the contactor and the telecontrol function in the electric
cassette. 230 V is taken from T2L. Connection capacity is set at 2/3 (factory
setting) in the 5.2 menu display .
The strap between L3 and ELB should be removed when an alarm function
for the electric cassette's overheat protection is required. A strap is instead
fi tted from the overheat protection to ELB. NOTE! Must be phase L3.
Connecting the heat pump to the power supply
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Terminal card
Alarm lamp, room
sensor
Terminal card 230V
Wiring to the hot water heater,
(starting) is connected to relay
terminals 11 and 14.
NOTE! HR is not included in the
delivery.