Install Manual

Fig. 8.2

Fig. 8.3

Page 37

mrcool.com

Electrical Connections

CAUTION

NOTE: ELECTRICAL WORK MUST BE COMPLETED BY A QUALIFIED TECHNICIAN.

Connect the connective cables to the terminals, as identiﬁed below, with their matching numbers

on the terminal block of the indoor and outdoor units. For example, in the US models shown in the

following diagram, Terminal L1(A) of the outdoor unit must connect with terminal 1 on the indoor

unit. Continue to match zone to zone for any additional connections.

See wiring diagrams below (Fig. 8.2 & Fig. 8.3) and take note of the following precautions:

• Check the speciﬁcations for the power source before proceeding.

• Conﬁrm that the electrical capacity is suﬃcient.

• Conﬁrm that the cable thickness is as speciﬁed in the power source speciﬁcations.

• Always install an earth leakage circuit breaker in wet or moist areas.

• The following can be caused by a drop in voltage; vibration of a magnetic switch, damaging the

contact point, broken fuses, and disturbance of normal functioning.

• Disconnection from a power supply must be incorporated into the ﬁxed wiring. It must have an air

gap contact separation of at least 1/8 in (3 mm) in each active (phase) conductors.

• Before accessing terminals, all supply circuits must be disconnected.

• If using magnetic rings (optional - not supplied), you must use the correct magnetic rings on your

equipment to satisfy the EMC compulsory regulations required by the international standard CISPR

14-1:2005/A2:2011.

NOTE

This product is designed to run on 60Hz frequency which is the North American standard.

Run the main power cord through the lower line-outlet of the cord clamp. Use a magnetic ring (not

supplied, optional part) to hitch the connective cable of indoor and outdoor units after installation. One

optional magnetic ring is used for one cable.

---- This symbol indicates ﬁeld wiring.

Up to Three Zones

OPTIONAL

Up to Four Zones

LPPUS REWOP Y

L1(A)

L2(A)

S(A)

L1(B)

L2(B)

S(B)

1(C) 2(C) 3(C) 1(D) 2(D) 3(D)

TO A

TO B

TO D

TO C

OPTIONAL

This symbol indicates optional magnetic ring.