background image

7

•  Areas exposed to fossil fuels (such as oil or gas in 

kitchens).

•  Areas exposed to strong electromagnetic forces.
•  Areas exposed to acids or alkaline detergents.

DO

•  Place the unit so that it is not exposed to direct sun­

light.

• 

Ensure the structural wall can support the weight of 

the unit.

•  Select a location where condensate line will have the 

shortest run to a suitable drain per local codes.

• 

Allow sufficient space around unit for proper operation 

and maintenance.

•  Install unit a minimum of 3 feet (1m) away from any 

antenna, power cord (line) radio, telephone, security 

system, or intercom. Electrical interference and radio 

frequencies from any of these sources may affect op­

eration.

• 

Be sure to instruct homeowners on how to properly 

operate the unit (especially maintenance of air filter, 

and operation procedure) by having them carry out 

operations themselves while looking at the manual 

provided with the controller.

Determining Wall Mounting Plate Location

Right piping

Left piping

 

Right back piping

Left back piping

Figure 11. Determining Exit Locations

1.  Remove the wall mounting plate from the back of the 

indoor unit.

2.  Determine the best exit location for utility bundle 

(line set, condensate line and wiring). See the 

following section concerning wall sleeve installation 

instructions.

3.  Position the wall mounting plate on the wall so that, 

when installed, the unit will be at least 6 inches (152 

mm) from the ceiling and 5 inches (127 mm) from the 

wall on either side. The wall mounting plate must be 

level side­to­side.

4. 

Use  the  wall  mounting  plate  as  a  template  to 

determine the exit point for utility bundle. Mark the 

wall to facilitate drilling hole for utility bundle.

Installation of Wall Mounting Plate

Install  the  wall  mounting  plate  (see  “Figure  6.  9K  and 

12K Indoor Unit Wall Plate Dimensions - Inches (mm)” on 

page  5)  so  that  it  is  correctly  positioned  horizontally 

and vertically. The indoor unit must be installed level on 

the wall to allow proper condensate drainage.

1. 

Use a carpenter’s level or measuring tape to verify the 

wall mounting plate is horizontally level.

2.  Secure the wall mounting plate to the wall using the 

provided screws and screw anchors. 

NOTE: 

It is important to use all screws provided to secure 

the wall mounting plate to the wall. Additional holes 

may be drilled through the metal wall mounting 

plate to better secure wall plate. Field-provided 

anchors/fixings  may  be  required  depending  on 

wall construction. Use the appropriate type of 

anchors for the application.

3. 

The  wall  mounting  plate  must  be  installed  flush 

against the wall so that the indoor unit will be flush 

after installation. Any space between the wall and unit 

will cause noise and vibration.

4. 

The wall mounting plate must be installed horizontally 

level on the wall.

Installation of Wall Sleeve

The utility bundle may be routed out of the back of the unit 

or out either side. If the bundle is to be routed out the back 

through an external wall, use a field-provided wall sleeve 

to protect the utility bundle. 

NOTE: 

If the utility bundle will be routed out the side of the 

indoor unit and up the wall above a false ceiling, 

continue to the next section.

1.  Prior to making the hole and installing the wall sleeve 

for the utility bundle, check to ensure that there are 

no other utilities located in the wall behind the hole 

location.

2.  Cut a hole in the wall using a suitable hole saw. Hole 

should be at a slight downward slant - 3/16” to 3/8” 

toward the outdoor side.

3.  Measure the thickness of the wall from the inside 

edge to the outside edge and cut the field-provided 

wall sleeve at a slight angle 1/4” (6 mm) shorter than 

the thickness of the wall.

INSIDE

OUTSIDE

Typical

installation

procedure

shown.

Figure 12. Boring Hole for Wall Sleeve

USE SUITABLE TOOL TO CUT PVC FOR WALL

SLEEVE AT SLIGHT ANGLE AS SHOWN.

Figure 13. PVC Wall Sleeve Installation

NOTE: 

When passing bundled services through an 

exterior  brick  or  concrete  wall,  protect  the 

copper pipes and wiring from the effects of these 

construction materials by using a sleeve made 

of suitable material. The integrity of copper pipe 

and wiring can deteriorate when exposed to these 

construction materials.

Summary of Contents for MWHB Series

Page 1: ...indoor wall unit assembly must be thoroughly cleaned following final construction clean up All mini split operating conditions must be verified ac cording to these installation instructions MHB and M...

Page 2: ...ing of refrigerant CFCs HCFCs and HFCs as of July 1992 Approved methods of recovery recycling or reclaiming must be followed Fines and or incarceration may be levied for non compliance CAUTION As with...

Page 3: ...n 012 1 ton 018 1 5 tons 024 2 tons Refrigerant Type 4 HFC 410A Minor Design Sequence 1 1st Revision M H B 009 S 4 S 1 P Series Type M Mini Split OUTDOOR SINGLE ZONE HEAT PUMP UNITS Cooling Efficiency...

Page 4: ...14 11 1 4 286 30 7 8 784 21 7 8 556 17 3 4 451 30 1 8 765 2 3 4 70 2 3 8 60 3 5 8 92 11 7 8 302 Figure 2 9K and 12K Outdoor Unit Dimensions Inches mm DRAIN HOLE bottom of unit FRONT VIEW SIDE VIEW TOP...

Page 5: ...mm inch Indoor unit outline Right rear side refrigerant pipe inlet 2 1 2 64 diameter 18K 3 1 2 90 24K Left rear side refrigerant pipe inlet 2 1 2 64 diameter 18K 3 1 2 90 24K 1 7 8 48 18K 2 1 8 54 24K...

Page 6: ...Rc Rockwell scale minimum Fully insert the wrench into the valve stem recess Service valve stems are factory torqued from 9 ft lbs 12 N m for small valves to 25 ft lbs 34 N for large valves to prevent...

Page 7: ...se a carpenter s level or measuring tape to verify the wall mounting plate is horizontally level 2 Secure the wall mounting plate to the wall using the provided screws and screw anchors NOTE It is imp...

Page 8: ...r unit 3 Drain should be as short as possible and should not have any droops or kinks that would restrict condensate flow and shall be approved resistant pipe There must be a 2 inch 51 mm space betwee...

Page 9: ...ne security system or intercom Electrical interference and radio frequencies from any of these sources may affect operation Since water drains from the outdoor unit during vari ous stages of operation...

Page 10: ...earing wall or area of the roof that can adequately support the unit Consult local codes for rooftop applications CAUTION Roof Damage This system contains both refrigerant and oil Some rubber roofing...

Page 11: ...nto the refrigerant piping before it is connected 10 CAREFULLY adjust refrigerant piping connections to suit the application 11 Slowly loosen one of the flare nuts to release the factory nitrogen char...

Page 12: ...sible and must be insulated to prevent condensation OUTDOOR UNIT OUTDOOR UNIT INDOOR UNIT INDOOR UNIT Maximum Line Set Length Maximum Line Set Length Maximum Elevation Outdooor Unit BELOW Indoor Unit...

Page 13: ...port connections liquid and gas line pipes until a positive pressure is achieved 3 Evacuate the system to a reading of 5000 Microns 5 Torr 4 Break the vacuum by allowing nitrogen into the port connec...

Page 14: ...ingle Zone Wiring IMPORTANT This unit must be properly grounded and protected by a circuit breaker The ground wire for the unit must not be connected to a gas or water pipe a lightning conductor or a...

Page 15: ...line service valves to release the refrigerant charge contained in outdoor unit into the system 5 Replace the stem caps and tighten to the value listed in Table 1 Torque Requirements on page 6 6 Check...

Page 16: ...Anti cold Air Flow n a cF Remote On Off n a CP ECO mode n a On display 3 seconds Outdoor Unit LED Slow flash Flashing at 1Hz Fast flash Flashing at 2Hz Test Run Pre Checks Only perform test run after...

Page 17: ...is below 60 F 16 C In this instance you can use the MANUAL CONTROL button on the indoor unit to test the COOL function 1 Lift the front panel of the indoor unit and raise it until it clicks in place 2...

Page 18: ...18 Indoor Unit Wiring Diagrams Figure 34 MWHB 09K 12K and 18K 115V and 208 230VAC Indoor Unit Wiring Diagram 16022000C27182 Figure 35 MWHB 24K 208 230VAC Indoor Unit Wiring Diagram...

Page 19: ...19 Outdoor Unit Wiring Diagrams Figure 36 MHB 9K and 12K 115VAC Outdoor Unit Wiring Diagram Figure 37 09K 12K and 18K 208 230VAC Outdoor Unit Wiring Diagram...

Page 20: ...20 Figure 38 MHB 24K 208 230VAC Outdoor Unit Wiring Diagram...

Reviews: