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262673-UIM-B-0707

2

Unitary Products Group

1.

Install this air handler only in a location and position as specified in
SECTION III of these instructions.

2.

Always install the air handler to operate within the air handler’s
intended maximum outlet air temperature. Only connect the air
handler to a duct system which has an external static pressure
within the allowable range, as specified on the air handler rating
plate.

3.

When an air handler is installed so that supply ducts carry air cir-
culated by the air handler to areas outside the space containing
the air handler, the return air shall also be handled by duct(s)
sealed to the air handler casing and terminating outside the space
containing the air handler.

4.

The air handler is not to be used for temporary heating of buildings
or structures under construction.

5.

The size of the unit should be based on an acceptable heat loss or
gain calculation for the structure. ACCA, Manual J or other
approved methods may be used.

SAFETY REQUIREMENTS

1.

Failure to carefully read and follow all instructions in this manual
can result in air handler malfunction, death, personal injury and/or
property damage.

2.

This air handler should be installed in accordance with all national
and local building/safety codes and requirements, local plumbing
or wastewater codes, and other applicable codes.

3.

Refer to the unit rating plate for the air handler model number, and
then see the dimensions page of this instruction for supply air ple-
num dimensions in Figure 3. The plenum must be installed accord-
ing to the instructions.

4.

Provide clearances from combustible materials as listed under
Clearances to Combustibles.

5.

Provide clearances for servicing ensuring that service access is
allowed for electric heaters and blower.

6.

Check the rating plate and power supply to be sure that the electri-
cal characteristics match.

7.

Air handler shall be installed so the electrical components are pro-
tected from water.

8.

Installing and servicing heating/cooling equipment can be hazard-
ous due to the electrical components. Only trained and qualified
personnel should install, repair, or service heating/cooling equip-
ment. Untrained service personnel can perform basic maintenance
functions such as cleaning and replacing the air filters. When
working on heating/cooling equipment, observe precautions in the
manuals and on the labels attached to the unit and other safety
precautions that may apply.

9.

These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances
these instructions exceed certain local codes and ordinances,
especially those who have not kept up with changing residential
and non-HUD modular home construction practices. These
instructions are required as a minimum for a safe installation.

INSPECTION

As soon as a unit is received, it should be inspected for possible dam-
age during transit. If damage is evident, the extent of the damage
should be noted on the carrier’s freight bill. A separate request for
inspection by the carrier’s agent should be made in writing. Also, before
installation the unit should be checked for screws or bolts, which may
have loosened in transit. There are no shipping or spacer brackets
which need to be removed.

Also check to be sure all accessories such as heater kits, suspension
kits, and coils are available. Installation of these accessories or field
conversion of the unit should be accomplished before setting the unit in
place or connecting any wiring, electric heat, ducts or piping.

LIMITATIONS

These units must be wired and installed in accordance with all national
and local safety codes.

Voltage limits are as follows: 

Airflow must be within the minimum and maximum limits approved for
electric heat, evaporator coils and outdoor units.

SECTION III: UNIT INSTALLATION

CLEARANCES

Clearances must be taken into consideration, and provided for as fol-
lows:

1.

Refrigerant piping and connections - minimum 12” recommended.

2.

Maintenance and servicing access - minimum 36” from front of unit
recommended for blower motor / coil replacement.

3.

Condensate drain lines routed to clear filter and panel access.

4.

Filter removal - minimum 36” recommended.

LOCATION

Location is usually predetermined. Check with owner’s or dealer’s
installation plans. If location has not been decided, consider the follow-
ing in choosing a suitable location:

1.

Select a location with adequate structural support, space for ser-
vice access, clearance for air return and supply duct connections.

2.

Use hanging brackets to wall mount unit as shown.

3.

Normal operating sound levels may be objectionable if the air han-
dler is placed directly over some rooms such as bedrooms, study,
etc.

4.

Select a location that will permit installation of condensate line to
an open drain or outdoors allowing condensate to drain away from
structure.

5.

When an evaporator coil is installed in an attic or above a finished
ceiling, an auxiliary drain pan should be provided under the air
handler as is specified by most local building codes. 

6.

Proper electrical supply must be available.

NOTE: 

In severe high humidity, high temperature indoor unit environ-

ments, seal completely with adequate fiberglass insulation using vapor
barrier on the outside.

Air Handler Voltage

Voltage code

1

Normal Operating 

Voltage Range

1. Rated in accordance with ARI Standard 110, utilization range “A”.

115-1-60

11

104-126

Entering Air Temperature Limits

Wet Bulb Temp.°F

Dry Bulb Temp. °F

Min.

Max.

Min.

Max.

57

72

65

95

Summary of Contents for MA - 115V

Page 1: ...rate injury It is also used to alert against unsafe practices and hazards involving only property dam age Improper installation may create a condition where the operation of the product could cause personal injury or property damage Improper installation adjustment alteration service or mainte nance can cause injury or property damage Refer to this manual for assistance or for additional informati...

Page 2: ...e who have not kept up with changing residential and non HUD modular home construction practices These instructions are required as a minimum for a safe installation INSPECTION As soon as a unit is received it should be inspected for possible dam age during transit If damage is evident the extent of the damage should be noted on the carrier s freight bill A separate request for inspection by the c...

Page 3: ...is document 8 Reposition and replace blower access panel AIR HANDLER AND COIL DOWNFLOW INSTRUCTIONS 1 Position blower casing over duct connection and secure such that the supply air end of the blower is down 2 Apply neoprene gasket to return air side of air handler 3 Place coil casing over blower return opening NOTE Tie plate and screws are provided with coils 4 Attach tie plate to casings of air ...

Page 4: ...al and or national codes This includes the standards of the National Fire Protection Association for Installation of Air Conditioning and Ventilat ing Systems NFPA No 90B AIR FILTERS Air filters and filter racks must be field supplied SUSPENSION KITS A suspension kit is available Models 1BH0601 unit size 018 060 is designed specifically for the units contained in this instruction upflow applicatio...

Page 5: ...s The humidity switch should be connected to the R and HUM terminals of the control See Figure 8 SECTION V REQUIRED CONTROL SET UP IMPORTANT The following steps must be taken at the time of installa tion to insure proper system operation 1 Consult system wiring diagram to determine proper thermostat wiring for your system 2 HEAT ENABLE jumper must be set to NO HEAT position 3 If a humidstat is ins...

Page 6: ... can be used to drive an external relay 24 VAC coil that switches the power input to the motor to a lower speed tap An accessory kit is available for this application The LOW FAN output is energized when the control has the following inputs as shown in Table 4 Blower Delays The control includes the following blower delays as shown in Table 5 SECTION VI LINE POWER CONNECTIONS Power may be brought i...

Page 7: ...1607 1533 1463 1395 1319 1044 851 725 673 673 Med 1308 1258 1197 1146 1097 887 742 648 608 609 Low 1148 1108 1061 1017 976 807 690 613 582 582 MC43B High 1462 1396 1322 1254 1172 1067 941 693 585 464 Med 1205 1154 1102 1046 980 897 704 560 441 220 Low 1075 1020 969 906 842 735 592 470 364 190 16C MC42C High 1959 1874 1802 1708 1606 1486 1408 1264 953 810 Med 1631 1587 1542 1473 1395 1315 1218 967 ...

Page 8: ... Control Board 4 MODE Jumper on AH control board should be set to A C for air conditioners and HP for heat pumps SECTION IX MAINTENANCE Filters must be cleaned or replaced when they become dirty Inspect at least once per month The frequency of cleaning depends upon the hours of operation and the local atmospheric conditions Clean filters keep unit efficiency high LUBRICATION The bearings of the bl...

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