Daikin MHC Instruction Manual

Assembling the Fuse Disconnect

Components

1. Remove (2) screws securing the base plate to the

box, and disconnect the base from the cover.

2. Locate receptacle and plastic bag containing screws

and wire grommet. Assemble the receptacle and

grommet for a right hand or left hand unit installation

(Figure 2).

Figure 2. Location of Disconnect Assembly

3. Knock out top holes for fuse holders. Locate fuses

and fuse holders from kit.

4. Remove fuse holder top, insert fuse, and reassemble

top to fuse holder. Install fuse holders into box using

(4) screws.

Installation & Maintenance Data

Console Water Source Heat Pumps – Model MHC & MHW

Fuse/ Non-Fuse Disconnect (High-Sill Units Only)

Group: WSHP

Part Number: 669286601

Date: October 2013

IM 975

Procedure – Field Installed Accessory

1. Remove the fuse disconnect components from the

shipping carton and check that all parts are included

in the kit. Compare the parts to the parts list enclosed

with the kit.

Figure 1. Fused Disconnect Assembly

WARNING

Installation and maintenance are to be performed by

qualied personnel who are familiar with local codes and

regulations, and experienced with this type of equipment.

Disconnect all electrical power before servicing unit.

Electrical shock will cause severe injury or death.

DANGER

CAUTION

Sharp edges can cause personal injury. Avoid contact

with them.

Figure 5. Wire schematic for non-fused disconnect

application

2. Reinstall bottom plate to disconnect box using (2)

screws.

3. Position disconnect kit assembly within subbase

(Figure 2).

4. Remove existing screw on inside of return air

opening (Figure 2).

5. Secure disconnect box to subbase using existing

screw from subbase and (1) screw from kit

(Figure 2).

Wiring the Cord Set

1. Locate service and disconnect wiring in junction

box. Disconnect ground, voltage and common

wires.

2. Wire cord to terminals where voltage, common and

ground wires were previously located.

Note:

Use wiring schematic on unit for reference

Figure 3. Panel Fastener Locations

5. To allow access to the interior of the subbase for

installation of the fuse disconnect, disassemble

the unit by removing the appropriate fastener

(numbered 1) shown in Figure 3, securing the right

or left side /corner panel to the subbase. Lift the

panel up and out until the bottom tab clears the slot

in the subbase.

Note: Set the unit panel aside where it will not be

damaged. Maintain all screws and fasteners for re-

installation.

Wiring

1. Use wiring provided with disconnect kit and

wire as shown in Figure 4, for a fused disconnect

application. Refer to Figure 5 for non-fused

disconnect application.

Figure 4. Wire schematic for fused disconnect application

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