Lennox VEP034N432US User Manual page 26

or a similarly qualified person in order to avoid a hazard.
(7) An all-pole disconnection device which has at least 3mm clearances in all poles, and
disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
(8) Details of type and rating for fuse.
Model: VEP048N432US, VEP042N432U, VEP048N432U, VEP060N432U.
Ceramic 250V5A (front main board), ceramic 250V3.15A (back main board).
Model: VEP027N432US, VEP034N432US, VEP042N432US.
Ceramic 250V5A (front main board), ceramic 250V30A (front main board).
(9) Connect the unit to specialized grounding device and make sure it is securely grounded. It's
a must to install air switch and current circuit breaker that can cut off the power of the entire
system. The circuit breaker should include magnetic trip function and thermal trip function so
that system can be protected from short circuit and overload.
(10) Grounding Requirements.
1) Air conditioner belongs to class I electrical appliance, so it must be securely grounded.
2) The yellow-green wire inside the unit is a ground wire. Do not cut it off or secure it with
tapping screws, otherwise it will lead to electric shock.
3) Power supply must include secure grounding terminal. Do not connect the ground wire
to the following:
①Water pipe; ②Gas pipe; ③Drain pipe;
④Other places that are deemed as not secure by professional technicians.
4.6.2 Wiring Diagram
(1) Connection of power cord and communication wire Separate power supply for IDU and
ODU.
1) Single-phase power supply unit.
(VEP027N432US, VEP034N432US, VEP042N432US, VEP048N432US,
VEP042N432U, VEP048N432U, VEP060N432U).
Fig.26 Connection of power cord and communication wire for IDU and ODU
22
DC Inverter Multi VRF System