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Carefully  unpack  the  unit  and  inspect  the  contents  for  damage.  If 
any damage is found at the time of delivery, proper notification and 
claims should be made with the carrier. 
Check  the  rating  plate  to  assure  model  number  and  voltage. 
Furthermore,  check  that  kits  match  with  what  was  ordered.  The 
manufacturer should be notified within 5 days of any discrepancy or 
parts shortage. 

The  small  air  handler  should  be  centrally  located  and  may  be 
installed  in  a  closet,  alcove,  utility  room,  or  basement.  Minimum 
clearances must be met. 

The  air  handler  comes  standard  with  two  different  options  for 
mounting, wall mount or frame mount. Both mounting options require 
the unit to be level from side to side and from front to back in order to 
allow condensate to properly drain from the unit. Failure to do this will 
result  in  condensate  leaking  out  from  the  unit,  potentially  causing 
structural  damage  to  the  surrounding  support  structures,  dry  wall, 
carpet,  etc.  Also,  both  mounting  structures  require  the  ability  to 
accommodate a minimum of 150 lb load. Failure to do this will cause 
damage to the support structure and potentially damage the unit.  

The

 

air

 

handler

 

comes

 

standard

 

with

 

an

 

upper

 

and lower wall mount  

bracket. Reference Figure 3-1 for more detail.

1.

 

Remove

 

lower

 

wall

  

mounting

 

bracket

 

from

 

the

 

back

 

of

 

the

 

unit

 

by

removing

 

one

 

screw

 

which

 

attaches

 

the

 

bracket

 

to

 

the

 

air

 

handler.

Note:

 

Discard the screw after you have removed the wall mounting

bracket.

2.

 

Install

 

bracket

 

on

 

the

 

wall

 

by

 

using

 

3

 

wood

 

screws

 

(not

 

provided).

Make

 

sure

 

the

 

bracket

 

is

 

level

 

in

 

order

 

to

 

provided

 

proper

 

drainage

from

 

the

 

unit.

 

Note:

 

Do

 

not

 

attach

 

the

 

wall

 

mounting

 

bracket

 

into

unsupported

 

dry

 

wall.

 

Make

 

sure

 

that

 

the

 

wood

 

screws

 

are going into

a structure that can suppport a minimum load of 150 lb.
3.

 

Lift

 

the

 

air

 

handler

 

above

 

the

 

wall

 

mounting

 

bracket and attach the

unit to the installed bracket. Reference Figure 3-1.
4.

 

Install

 

the

 

additional

 

bottom plate for extra support for this type

mounting (see figure 3-1).
Note:

 

The

 

additional

 

plate

 

is shipped in the bottom of the shipping

carton (only for 30/36k unit).

3.2.1 WALL MOUNT

 Fig. 3-2 FRAME MOUNT 

The

 

air

 

handler

 

comes

 

with

 

8

 

clearance

 

holes

 

(4

 

on

 

each

 

side).

 

These 

holes

 

are

 

used

 

to

 

mount

 

the

 

air

 

handler

 

inside

 

of

 

a

 

frame

 

structure 

(see

 

Figure

 

3-2).

 

When

 

mounting

 

in

 

this

 

fashion,

 

make

 

sure

 

that

 

the 

wood

 

screws

 

are

 

mounted

 

from

 

within

 

the

 

air

 

handler

 

and

 

not

 

outside 

of

 

the

 

unit.

 

Install

 

the

 

screws

 

from

 

outside

 

the

 

unit,

 

and

 

avoid 

damaging

 

the

 

coil.

 

If

 

the

 

frame

 

does

 

not

 

provide

 

support

 

in

 

the

 

front 

of

 

the

 

unit

 

and

 

additional

 

support

 

is

 

needed,

 

open

 

up

 

the

 

tabs

 

and

 

fix 

the

 

unit

 

to

 

the

 

frame

 

or

 

other

 

support

 

structure

 

with

 

screws

 

(only

 

for 

30K/36K).

 

Select

 

a

 

solid

 

and

 

level

 

site

 

to

 

ensure

 

proper

 

installation

 

of 

the

 

frame

 

mount.

 

Verify

 

that

 

there

 

is

 

sufficient space for installation 

and maintenance.(See Figure. 3-3)

3.2.2 FRAME MOUNT

 Fig. 3-1 WALL MOUNT 

Section 3. Installation Instructions

3.1 Unpacking

3.2 Location

WALL STRUTURE 

WOOD SCREWS 

WOOD SCREWS 

PROVIDED WALL 
MOUNT BRACKET 

NOTE: MOUNTING WALL AND SUPPORTING 
STRUCTURE MUST BE ABLE TO SUPPORT A 
MINIMUM OF 150 LBS. 

PROVIDED AIR HANDLER 

MOUNTING BRACKET 

NOTE: 
IN ORDER TO PREVENT 
AIR LEAKAGE,THE TABS 
AND SCREW HOLES 
NEED TO BE SEALED 
UP WHEN THEY ARE 
NOT TO BE USED 

PROVIDED WALL 

MOUNT BRACKET 

WOOD SCREWS 

SUPPORTING 2

X4

"

STRUCTURE 

WOOD SCREWS

WALLMOUNT BRACKET 

(ONLY FOR 30K/36K) 

WALL STRUCTURE

SUPPORTING

2˝X4˝ STRUCTURE

WOOD SCREWS

SUPPORTING
2˝X4˝ STRUCTURE

STUD ATTACHMENT

HOLES

THE TABS

BRACKET PLACEMENT FOR 

HANGING IN A CLOSET

damage. See Figure 3-2 for frame mount installation.

studs.  If  they  are  not  used,  the  unit  may  fall  down  or  cause  other 

on a wood frame, the screws should be used to fix the unit to the 

 wood screws are recommended. When the unit is installed 

˝

#12 x 1 ½

The (8) wood screws are not provided with the unit. 

IMPORTANT: 

4

Summary of Contents for OXBOX JMM4A0A18S21SAA

Page 1: ...single phase 5 7 5 and 10 kW heaters All aluminum coil Factory installed piston style refrigerant control Field installed TXV kits available Blower and coil slide out easily for maintenance Factory sealed cabinet certified to achieve 2 or less air leakage rate at 1 0 inch water column Front or bottom return air Painted finish on galvanized steel Sturdy polycarbonate drain pans Air handler has fact...

Page 2: ... state electrical code on requirements for grounding Failure to follow this warning could result in property damage serious personal injury or death HAZARDOUS VAPORS Do not install an air handler with a non ducted return in the same closet alcove or utility room as a fossil fuel device Hazardous vapors can be distributed throughout the conditioned space and equipment damage can result Section 2 Sa...

Page 3: ...ins adhesives cleaning compounds and cement creates a corrosive condition which may cause rapid deterioration of the cabinet and internal components CAUTION SAFETY HAZARD Sharp Edge Hazard Be careful of sharp edges on equipment or any cuts made on sheet metal while installing or servicing Personal injury may result WARNING Make sure the blower motor support is tight 3 motor mount bolts then check ...

Page 4: ...mounting bracket and attach the unit to the installed bracket Reference Figure 3 1 4 Install the additional bottom plate for extra support for this type mounting see figure 3 1 Note The additional plate is shipped in the bottom of the shipping carton only for 30 36k unit 3 2 1 WALL MOUNT Fig 3 2 FRAME MOUNT The air handler comes with 8 clearance holes 4 on each side These holes are used to mount t...

Page 5: ...idential Winter and Summer Air Conditioning and Equipment Selection Latest editions are available from ACCA Air Conditioning Contractors of America 1513 16th Street N W Washington D C 20036 If duct system incorporates flexible air duct be sure pressure drop information straight length plus all turns shown in ACCA Manual D is accounted for in system Supply plenum is attached to the 3 4 duct flanges...

Page 6: ...HP or AC single stage heating cooling with electric heat The thermostat will energize the fan on a demand for heating or cooling Install the thermostat on an inside wall away from drafts lights or other heat sources in a location that has sufficient air circulation from other rooms being controlled by the thermostat The thermostat should be mounted 4 to 5 feet above the floor Low voltage control w...

Page 7: ...oints are tight 7 Be sure the return air filter is installed 8 Operate complete system in each mode to verify proper performance Verify operation of supplementary electric heater 7 3 13 Maintenance The system air filter s should be inspected cleaned or replaced at least monthly Make certain that the access panels are replaced and secured properly before placing the unit back in operation This prod...

Page 8: ...ctric heaters 8 N E C class2 24volts Factory default fan speed is medium FM red wire connected to FR 4 For HI speed connect FM black wire to FR 4 For LOW speed connect FM blue wire to FR 4 and FM red wire to FR 6 Always connect the unused FM wire to the dummy terminal CN3 connect the plug to electric heaters kit when applied FM T A T S O M R E H T O T PLUG PLATE SEE NOTE 4 SCHEMATIC DIAGRAM COMPON...

Page 9: ... 1290 1263 1196 1116 1051 980 907 Med 1298 1252 1198 1147 1094 1037 976 910 842 Low 1149 1105 1056 1008 960 909 856 791 726 36 EXTERNAL STATIC PRESSURE in w c 24 30 MODEL JMM4A BLOW ER SPEEDS 18 Shaded boxes represent airflow outside the required 300 450 cfm ton NOTES 1 Airflow based upon dry coil at 230V with no electric heat and factory approved filter 2 Airflow is equivalent for front or bottom...

Page 10: ...applications section for more detail Primary drain conncetion 3 4 female pipe thread NPT Auxiliary drain connection 3 4 female pipe thread NPT NOTE Hand tighten only Section 7 Dimensional Data DIMENSIONAL DATA 18 88 101 40 46 MODEL SIZE Dimensions inch mm UNIT HEIGHT H IN mm UNIT WIDTH W IN mm UNIT LENGTH D IN mm 88 101 40 46 24 UNIT WIDTH W1 IN mm UNIT WEIGHT SHIPPING WEIGHT LBS kg UNIT LENGTH D1...

Page 11: ...MENSIONS A B C JMM4A0A18S21SAA 24 9 10 150 10 1 8 61 119 1 20 717 JMM4A0A24S21SAA 24 9 10 150 10 1 8 61 119 1 20 717 JMM4A0B30S21SAA 24 9 10 150 10 1 8 61 132 795 JMM4A0B36S31SAA 24 9 10 150 10 1 8 61 132 795 Model number Dimension inch mm ...

Page 12: ...our local dealer distributor Since the manufacturer has a policy of continuous product and product data improvement it reserves the right to change the design and specification without notice 16123000A19244 V2 0 www oxboxhvac com 2019TwentyThreeC LLC 800 Beaty Street ...

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