Thermo Pride Air Handler MA User Manual

MODULAR

INSTALLATION MANUAL

MAC-225 ECN 5287-MA 121005

NON-VARIABLE SPEED AIR HANDLERS

MODELS: MA

LIST OF SECTIONS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ELECTRIC HEATER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 5

LOW VOLTAGE CONTROL CONNECTIONS . . . . . . . . . . . . . . . . . . 6

REQUIRED CONTROL

LIST OF FIGURES

Typical Installation with MC Multi-Position Coils . . . . . . . . . . . . . . . . . 3

Coil and Air Handler Attachment Details . . . . . . . . . . . . . . . . . . . . . . .3

Gasket Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Dimensions & Duct Connection Dimensions . . . . . . . . . . . . . . . . . . . . 4

Typical Horizontal Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Line Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

LIST OF TABLES

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Low Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Low Fan Control Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Blower Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Heat Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Physical and Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Electrical Data - Cooling Only (60 Hz) - 208/230 . . . . . . . . . . . . . . . . .9

Electrical Data - Cooling Only (60 Hz) - 460 . . . . . . . . . . . . . . . . . . . .9

Conversion Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Electrical Data - 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical Data - (For Multi-Source Power Supply) -

Copper Wire 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

ISO 9001

Certified Quality

Management System

SET-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

LINE POWER CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

BLOWER SPEED CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 8

UNIT DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

460V - Line Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Blower Speed Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

460V - Blower Speed Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Cooling Models with Electric Heat Wiring . . . . . . . . . . . . . . . . . . . . . 15

Single-Stage Cooling Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Electrical Data - (For Single Source Power Supply) -

Copper Wire 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical Data - 3 Ø - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical Data - (For Multi-Source Power Supply) -

Copper Wire 3 Ø - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Electrical Data - (For Single Source Power Supply) -

Copper Wire 3 Ø - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Electrical Data - 460-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Electrical Data - (For Single Source Power Supply) -

Copper Wire 3 Ø - 460-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Air Flow Data - 60 Hz Models (230 & 460 Volt) . . . . . . . . . . . . . . . . 13

Air Flow Data - 60 Hz Models (208 Volt) . . . . . . . . . . . . . . . . . . . . . 14

SECTION I: GENERAL

This modular air handler provides the flexibility for installation in any upflow, downflow, or horizontal application. These versatile models may be used for cooling or heat pump operation with or without electric heat.

A BRAND LABEL (available from Distribution) may be applied to the center of the blower access panel.

The unit can be positioned for bottom return air in the upflow position, top return air in the downflow position, and right or left return in the horizontal position.

Top and side power wiring and control wiring, accessible screw terminals for control wiring and easy to install electric heaters all combine to make the installation easy, and minimize installation cost.

SECTION II: SAFETY

This is a safety alert symbol. When you see this symbol on labels or in manuals, be alert to the potential for personal injury.

Understand and pay particular attention to the signal words DANGER,

WAR NIN G, or CAUTION.

DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious injury

WAR NIN G indicates a potentially hazardous situation, which, if not

avoided, could result in death or serious injury

.

CAUTION indicates a potentially hazardous situation, which, if not avoided may result in minor or moderate injury. alert against unsafe practices and hazards involving only property damage.

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 maintenance can cause injury or property damage. Refer to this manual for assistance or for additional information, consult a qualified contractor, installer or service agency.

This product must be installed in strict compliance with the installation instructions and any applicable local, state, and national codes including, but not limited to building, electrical, and mechanical codes.

FIRE OR ELECTRICAL HAZARD Failure to follow the safety warnings exactly could result in serious

injury, death or property damage. A fire or electrical hazard may result causing property damage, per-

sonal injury or loss of life.

It is also used to

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 circulated 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. 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.

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

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

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

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

6. Check the rating plate and power supply to be sure that the electrical characteristics match.

7. Air handler shall be installed so the electrical components are protected from water.

8. Installing and servicing heating/cooling equipment can be hazardous due to the electrical components. Only trained and qualified personnel should install, repair, or service heating/cooling equipment. 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 damage 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:

1

Air Handler Voltage Voltage code

208/230-1-60 21 187-253

460-3-60 41 432-504

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

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

Entering Air Temperature Limits

Wet Bulb Temp.°F Dry Bulb Temp. °F

Min. Max. Min. Max.

57 72 65 95

Normal Operating

Voltage Range

SECTION III: UNIT INSTALLATION

CLEARANCES

Clearances must be taken into consideration, and provided for as follows:

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.

5. A combustible floor base accessory is available for downflow applications of this unit, if required by local code.

LOCATION

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

1. Select a location with adequate structural support, space for service 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 handler 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.

NOTICE

In severe high humidity, high temperature indoor unit environments, seal completely with adequate fiberglass insulation using vapor barrier on the outside.

2

FIGURE 1: Typical Installation with MC Multi-Position Coils

UPFLOW

DOWNFLOW

HORIZONTAL RIGHT

HORIZONTAL LEFT

DOWNFLOW AND HORIZONTAL CONVERSION

These air handler units are supplied ready to be installed in a upflow, downflow and left or right hand horizontal position.

If the unit is to be installed with an evaporator coil, refer to Figure 1 for unit positioning information.

TIE PLATE

AIR HANDLER

COIL

UPFLOW & HORIZONTAL

APPLICATIONS

DOWNFLOW

APPLICATION

TOP PLATE

AIR HANDLER

FIGURE 2: Coil and Air Handler Attachment Details

AIR HANDLER AND COIL UPFLOW AND HORIZONTAL

1. Apply neoprene gasket to top of coil casing.

2. Position blower casing over coil opening.

3. Attach tie plate to casings of air handler and coil using screws.

4. Remove blower access panel and coil filter door.

5. Disconnect wiring to blower motor. *Note location of wires as these

will be reconnected in a later step.

6. Remove blower motor and housing.

7. Fasten duct flanges of coil to duct flanges of air handler with screws. See Figure 1.

8. Secure base of air handler to top of coil using screws.

9. Locate 2” wide foam gasket.

10. On the interior of the air handler/coil attachment point, apply foam gasket over duct flanges on the sides and back.

11. Reinstall blower motor and housing by reversing the process in Steps 3 and 4.

12. Complete electrical and blower speed connections as outlined in other sections of this document.

13. Reposition and replace blower access panel.

AIR HANDLER AND COIL DOWNFLOW

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.

4. Attach tie plate to casings of air handler and coil using screws.

5. Remove blower access panel and coil filter door.

6. Disconnect wiring to blower motor.

*Note location of wires as these will be reconnected in a later step.

7. Remove blower motor and housing.

8. Fasten duct flanges of coil to base of air handler with screws. See Figure 1.

9. Secure base of air handler to base of coil using screws.

10. Locate 2” wide foam gasket.

11. On the interior of the air handler/coil attachment point, apply foam gasket over duct flanges on the sides and back.

12. Reinstall blower motor and housing by reversing the process in Steps 3 and 4.

13. Complete electrical and blower speed connections as outlined in other sections of this document.

14. Reposition and replace blower access panel.

3

FIGURE 3: Gasket Location

J

K

B

A

22”

FIGURE 4: Dimensions & Duct Connection Dimensions

TABLE 1:

Dimensions

MA

MODELS

ABDE JK

Height Width Power Control

08B

17-1/2 16-1/2 14-19/32 12B 17-1/2 16-1/2 14-19/32 14D 24-1/2 23-1/2 21-19/32

25 16C 21 20 18-3/32 20D 24-1/2 23-1/2 21-19/32

1. Actual size (Conduit size).

DUCT CONNECTORS

Use 1/2" screws to connect ductwork to bottom of unit. Longer screws will pierce the drain pan and cause leakage. If pilot holes are drilled, drill only though field duct and unit bottom flange.

Air supply and return may be handled in one of several ways best suited to the installation. See Figure 3 for dimensions for duct inlet and outlet connections.

The vast majority of problems encountered with combination heating and cooling systems can be linked to improperly designed or installed duct systems. It is therefore highly important to the success of an installation that the duct system be properly designed and installed.

10-3/8”

CIRCUIT BREAKER

20-1/2”

PANEL

E

D

Wiring Knockouts

TOP OUTLET DIMENSIONS

BOTTOM INLET

DIMENSIONS

1

7/8” (1/2”) 1 3/8” (1”)

7/8” (1/2”)

1 23/32” (1 1/4”)

Use flexible duct collars to minimize the transmission of vibration/noise into the conditioned space. If electric heat is used, non-flammable material must be used.

Where return air duct is short, or where sound may be a problem, sound absorbing glass fiber should be used inside the duct. Insulation of duct work is a must where it runs through an unheated space during the heating season or through an uncooled space during the cooling season. The use of a vapor barrier is recommended to prevent absorption of moisture from the surrounding air into the insulation.

The supply air duct should be properly sized by use of a transition to match unit opening. All ducts should be suspended using flexible hangers and never fastened directly to the structure. This unit is not designed for non-ducted (freeblow) applications. Size outlet plenum or transition to discharge opening sizes shown in Figure 3.

4

Duct work should be fabricated and installed in accordance with local and/or national codes. This includes the standards of the National Fire Protection Association for Installation of Air-Conditioning and Ventilating Systems, NFPA No. 90B.

AIR FILTERS

Air filters and filter racks must be field supplied.

.

Equipment should never be operated without filters.

SUSPENSION KITS

A suspension kit is available. Models 1BH0601 (unit size 018-060) is designed specifically for the units contained in this instruction (upflow application only). For installation of these accessory kits, see the instructions packed with the kit.

HORIZONTAL SUSPENSION

For suspension of these units in horizontal applications, it is recommended to use angle steel support brackets with threaded rods, supporting the units from the bottom, at the locations shown in Figure 4.

SUSPENSION SUPPORT LOCATIONS FOR HORIZONTAL APPLICATIONS

MIN. 3/8”

THREADED ROD

3-1/2 - 5 Ton 24” 53” - 58” 22”

FIGURE 5: Typical Horizontal Installation

SECTION IV: ELECTRIC HEATER INSTALLATION

If the air handler requires electric heat, install the electric heat kit according to the installation instructions included with the kit. After installing the kit, mark the air handler nameplate to designate the heater kit that was installed. If no heater is installed, mark the name plate appropriately to indicate that no heat kit is installed.

The HEAT ENABLE jumper (See Figure 5) must be moved to the HEAT position to enable operation of the heater.

Use only 4HK heater kits, as listed on Air Handler name plate and in these Instructions. Use data from Tables 11 through 18 for information on required minimum motor speed tap to be used for heating operation, maximum over-current protection device required and minimum electrical supply wiring size required for listed combination of Air Handler and Heater Kit.

For Upflow, Downflow and Horizontal right hand applications the kits can be installed without modification.

Field modification is required for Horizontal left-hand airflow application only. Follow instructions with heater for modification.

MIN. 1-1/2” x 1-1/2” Angle

Recommended length

26” minimum

with 2” clearance on

both sides of Air Handler

2

WW

Units

(Nominal Tons)

XX

Dimension

WW XX YY

1-1/2 - 3 Ton 16” 48” 22”

FIGURE 5: Typical Horizontal Installation

HEAT ENABLE

YY

JUMPER

1-1/2

MODE JUMPER

HUM OUT

RELAY OUTPUT

LOW FAN

RELAY OUTPUT

EAC RELAY OUTPUT

HUM STAT JUMPER

FUSE

SPARE JUMPER

FIGURE 6: Control Board

5

SECTION V: LOW VOLTAGE CONTROL CONNECTIONS

The 24 volt power supply is provided by an internally wired low voltage transformer which is standard on all models, However, if the unit is connected to a 208 volt power supply, the low voltage transformer must be rewired to the 208 volt tap. See the unit wiring label.

Field supplied low voltage wiring can exit the unit on the top right hand corner or the right hand side panel. Refer to Figure 3.

Remove desired knockout and pierce foil faced insulation to allow wiring to pass through. Use as small of a hole as possible to minimize air leakage.

Install a 7/8” plastic bushing in the selected hole and keep low voltage wiring as short as possible inside the control box.

To further minimize air leakage, seal the wiring entry point at the outside of the unit.

The field wiring is to be connected at the screw terminals of the control board. Refer to Figures 10 & 11.

NOTICE

All wiring must comply with local and national electrical code requirements. Read and heed all unit caution labels.

NOTICE

It is possible to vary the amount of electric heat turned on during the defrost cycle of a heat pump. Standard wiring will only bring on the first stage of electric heat during defrost. See Heat Output and Limit Connections and Table 6 for additional information on heat during defrost cycle.

TABLE 2:

Terminal Signal Comment

The low voltage connections may be connected to the screw terminals or the quick connect terminals. The screw terminals and the quick connect terminals are physically connected on the control board.

HUMIDITY SWITCH INPUT

The air handler control is designed to work with a humidity control that closes when the humidity is below the set-point. The control is open when the humidity is above the set-point. This humidity control may be referred to as a humidistat or a dehumidistat.

The humidity switch controls both humidification and de-humidification operation of the control. The control provides humidification using the HUM OUT relay output and de-humidification by lowering the blower

Low Voltage Connections

R 24 VAC power (fused) G Continuous Fan operation

Y/Y2

HUM Humidity switch input

COM 24 VAC common

Second or full stage compressor operation

First stage compressor

Y1

operation W2 Second stage heat operation W1 First stage heat operation

O Reversing valve operation

Connection point for X/L

heat pump fault indicator

Not used with outdoor units having one stage compressors.

24 VAC will be present at this terminal when the MODE jumper is in the AC position. This is normal.

24 VAC will be present at this terminal when the HUM STAT jumper is in the NO position. This is normal.

This terminal is a connection point only and does not affect air handler control operation.

speed. This is accomplished using the LOW FAN output and a field installed two-speed fan relay kit for non-variable speed models and the de-humidification input of the motor for variable speed models. The humidity switch should be connected to the R and HUM terminals of the control. See Figures 10 & 11.

SECTION VI: REQUIRED CONTROL SET-UP

IMPORTANT: The following steps must be taken at the time of installation to insure proper system operation.

1. Consult system wiring diagram to determine proper thermostat wiring for your system.

2. If heat kit is installed, change HEAT ENABLE jumper from NO HEAT to HEAT position.

3. If a humidstat is installed, change HUM STAT jumper from NO to YES.

4. Set the MODE jumper to A/C (Air Conditioner) or HP (Heat Pump) position depending on the outdoor unit included with the system.

FUNCTIONALITY AND OPERATION

Jumper Positions

Heat Enable Jumper

The HEAT ENABLE jumper configures the control for heat kit operation. The jumper must be in the HEAT position if a heat kit is installed with the air handler.

With the jumper in the NO HEAT position, the control will not energize the heat relay outputs or sense the limit switch input.

If the jumper is not present, the control will operate as if the jumper is in the HEAT position. If the jumper is not present and a heat kit is not present, the control will sense an open limit condition and the blower will run continuously.

Hum Stat Jumper

The HUM STAT jumper configures the control to monitor the humidity switch input. With the jumper in the NO position, the control will energize the HUM terminal with 24 VAC continually. With the jumper in the YES position, the control will monitor the HUM input to control the HUM OUT output to control an external humidifier.

If the jumper is not present, the control will operate as if the jumper is in the YES position.

Mode Jumper

The MODE jumper configures the control to operate properly with an air conditioner (AC position) or heat pump (HP position). With the jumper in the AC position, the control will energize the O terminal with 24 VAC continually. With the jumper in the HP position, the O input signal is received from the room thermostat.

If the jumper is not present, the control will operate as if the jumper is in the HP position.

SPARE Jumper

The control includes a spare jumper that can be used if a jumper is lost. The SPARE jumper does not have any effect on the operation of the control.

Status and Fault Codes

The control includes an LED that displays status and fault codes. These codes are shown in Table 3. The control will display the fault codes until power is removed from the control or the fault condition is no longer present.

6

TABLE 3:

Status

No power to control OFF Normal operation 2s ON / 2s OFF Control in test mode Rapid Flash Control failure ON

Limit Faults

Limit switch currently open (not in lockout) 1 Multiple limit openings with no call for heat 2 Multiple limit openings during one call for heat 3 Single long duration limit opening 4 Multiple long duration limit openings 5 Fan failure 6

Wiring Related Faults

Simultaneous call for heating and cooling 7

Internal Control Faults

Control recovered from internal event 9

Fault Codes

Fault or Status Condition

LED1 (RED) Flash Code

External Relay Outputs

The control includes three outputs to drive external relays having 24 VAC coils. The outputs have a maximum rating of 1.0 Amp pilot duty at 24 VAC.

HUM OUT

The HUM OUT output can be used to drive an external relay or solenoid (24 VAC coil) to control a humidifier. The output is energized when the HUM input is energized, the HUM STAT is in the YES position, and the control has a thermostat call for heating (heat pump or electric heat).

EAC

The EAC output can be used to drive an external relay (24 VAC coil) to control an electronic air cleaner. The output is energized whenever the blower relay on the control is energized. Models having a high efficiency non-variable speed motor use the EAC output as an input to the motor. The EAC output can also be used to drive an electronic air cleaner relay as long as the load of the EAC relay does not exceed 1.0 Amp. An additional connection to the EAC terminals must be made using a piggyback terminal or similar device.

LOW FAN

The LOW FAN output 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.

TABLE 4:

Y/Y2 and HUM de-energized with

HUM STAT jumper in YES position

Low Fan Control Inputs

Input Operational Mode

G Continuous Fan operation

Y1 or Y1 and O First stage compressor operation

Dehumidification during cooling

Blower Delays

The control includes the following blower delays:

TABLE 5:

Condition Blower Delay

Following call for cooling 60 seconds Following call for heat pump heating 30 seconds Following call for electric heat heating 10 seconds

Blower Delays

Heat Output and Limit Connections

The control is connected to the heater relays and limit switch using the 6-pin connector. The relay outputs and the limit switch signal are 24 VDC.

The control energizes the heat relays and senses the limit switch input as shown in Table 6 when the HEAT ENABLE jumper is in the HEAT position.

TABLE 6:

The control energizes the first stage of electric heat immediately, the second stage 10 seconds after the call for second stage heat, and the third stage 20 seconds after the call for third stage heat.

Depending on the heat kit installed in the air handler, the control provides the flexibility to configure the amount of heat delivered with the first stage heating call. As an example, when the control’s W1 input is connected to the room thermostat’s first stage heat signal, a call for first stage heat will energize one heating element (HT1). If the control’s W2 input is connected to the room thermostat’s first stage heat signal, a call for first stage heat will energize two heating elements (HT1 & HT2). With either configuration, the control will energize three heating elements (HT1, HT2, & HT3) when it receives a first and second stage heat input from the thermostat.

Heat Relays

Input Heat Relay Output

W1 HT1 W2 HT1 and HT2

W1 and W2 HT1 and HT2 and HT3

Limit Switch and Lockout Operation

Limit Switch Operation

If the HEAT ENABLE jumper is in the HEAT position and the limit switch opens (fault code 1), the control will immediately de-energize all electric heat relay outputs and energize the blower (if it wasn’t already energized). When the limit switch closes, the control will re-energize electric heat according to the thermostat inputs using normal timings.

Fan On Lock Condition

If the limit switch opens multiple times during a single call for electric heat (fault code 3) or if the limit switch opens for a long duration (fault code 4), the control will energize the blower until power is removed from the control. The control will cycle the heat outputs on and off as the limit re-closes and opens. The constant fan operation will signal the homeowner that a problem has occurred and a service call is required.

Soft Lockout

If the limit switch opens for a second long duration period during a single call for heat (fault code 5), the control will keep the blower locked on and lock out the heat outputs for one hour. The control will only reset this one hour lockout when the power is removed from the control. After the one hour period has passed, the control will re-energize electric heat according to the thermostat inputs using normal timings. The blower will remain locked on from the first long duration limit opening.

Hard Lockout

The control has a hard lockout condition during which the control will keep all heat outputs de-energized until power is removed from the control. The control de-energizes the blower five minutes after entering the hard lockout condition.

If the limit switch closes and re-opens during the one hour soft lockout period, the control will enter a hard lockout condition and continue to indicate a fault code 5.

If the limit switch opens twice when no call for electric heat is present (fault code 2), the control will enter a hard lockout condition.

If the limit switch opens multiple times soon after a soft lockout reset (fault code 6), the control will enter a hard lockout condition.

Wiring Related Faults

If the control receives a simultaneous call for heating and cooling (fault code 7), the control will perform both heating and cooling operations.

7

SECTION VII: LINE POWER

ELECTRIC HEAT

WITHOUT CIRCUIT BREAKER

SINGLE SOURCE (2.5 - 10 KW)

GND. LUG

POWER SUPPLY

GND. LUG

ELECTRIC HEAT

WITHOUT CIRCUIT BREAKER

3 PHASE (10 - 15 KW)

GND. LUG

POWER SUPPLY

GND. LUG

1 PHASE ELECTRIC HEAT

WITH CIRCUIT BREAKER

AS SHIPPED FROM FACTORY

SINGLE SOURCE

(2.5 - 25 KW) - 25 KW SHOWN

GND. LUG

POWER SUPPLY

GND. LUG

1 PHASE ELECTRIC HEAT

WITH CIRCUIT BREAKER

& BREAKER BAR REMOVED

MULTI-SOURCE (15 - 25 KW) - 25 KW SHOWN

GND. LUG

POWER SUPPLY 1

GND. LUG

POWER SUPPLY 2

POWER SUPPLY 3

TYPICAL WIRING WITHOUT ELECTRIC HEAT

GND. LUG

POWER SUPPLY

GND. LUG

POWER WIRING (208/230-1-60)

NOTE: USE ONLY COPPER CONDUCTORS

TERMINAL BLOCK

MAYBE1,2,OR3 CIRCUIT BREAKERS

(JUMPER BAR)

CONNECT LEADS WITH WIRE NUTS (TYPICAL ALL HEAT KITS)

ELECTRIC HEAT

WITHOUT CIRCUIT BREAKER

3 PHASE (10 - 15 KW)

GND. LUG

POWER SUPPLY

GND. LUG

3 PHASE ELECTRIC HEAT

WITH CIRCUIT BREAKER MULTI-SOURCE - 25 KW

GND. LUG

POWER SUPPLY 1

GND. LUG

POWER SUPPLY 2

TERMINAL BLOCK

CONNECT TRANSFORMER LEADS WITH WIRE NUTS (TYPICAL ALL HEAT KITS)

(2) 3-PHASE

BREAKERS

FACTORY WIRED TO TRANSFORMER

FACTORY WIRED TO FAN MOTOR RELAY TERMINAL ON CONTROL BOARD

YEL

PUR

HIGH

MED

LOW

GND.

230 VOLT BLOWER MOTOR

CAP

BRN

ORG

TAPE END & CAP WITH WIRE NUT

L1

460 VOLT BLOWER MOTOR

L2

HIGH

MED LOW

PUR

BRN

460 VOLT BLOWER MOTOR

ORG

L1

460 VOLT BLOWER MOTOR

L2

MEDIUM

HIGH

MED LOW

PUR

BRN

ORG

460 VOLT BLOWER MOTOR

L2

LOW

HIGH

MED LOW

PUR

BRN

L1

CONNECTIONS

Power may be brought into the unit through the supply air end of the unit (top when unit is vertical) or the left side panel. Use the hole appropriate to the unit’s orientation in each installation to bring conduit from the disconnect. The power lead conduit should be terminated at the electrical control box. To minimize air leakage, seal the wiring entry point at the outside of the unit. See Figure 3.

Refer to Tables to determine proper wire sizing:

Tables 8 & 9 for cooling only or, Tables 12 & 13 for single phase or, Tables 15 & 16 for three phase or, Table 18 for 460V.

FIGURE 7: Line Power Connections

FIGURE 8: 460V - Line Power Connections

SECTION VIII: BLOWER SPEED CONNECTIONS

All air handlers contain 3-speed blower motors which are prewired to the control board.

FIGURE 9: Blower Speed Connections FIGURE 10: 460V - Blower Speed Connections

8 Unitary Products Group

Adjust blower motor speed to provide airflow within the minimum and maximum limits approved for evaporator coil, electric heat and outdoor unit. Speed tap adjustments are made at the motor terminal block, See Figure 8 or 9. Airflow data is shown in Tables 19 & 20.

Connect motor wires to motor speed tap receptacle for speed desired. See wiring label for motor wiring details.

SECTION IX: UNIT DATA

TABLE 7:

Models: MA MA08BN21 MA12BN21 MA12BN41 MA14DN21

Blower - Diameter x Width 10 x 9 10 x 9 10 x 9 10 x 10

Motor

Voltage 208/230 208/230 460 208/230 Amps Full Load 1.5 3.5 2.3 2.4

Permanent Filter

Shipping / Operating Weight (lbs.) 75/71 82/78 82/78 94/88

Models: MA MA16CN21 MA16CN41 MA20DN21 MA20DN41

Blower - Diameter x Width 10 x 10 10 x 10 11 x 10 11 x 10

Motor

Voltage 208/230 460 208/230 460 Amps Full Load 4.0 2.6 7.4 3.7

Permanent Filter

Shipping / Operating Weight (lbs.) 90/84 90/84 97/91 97/91

1. Field Supplied.

TABLE 8:

1. OCP = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.

Physical and Electrical Data

HP 1/4 HP 3/4 HP 3/4 HP 1/2 HP Nominal RPM 1075 1075 1075 1075

Type DISPOSABLE OR PERMANENT

1

Size 16 x 20 x 1 16 x 20 x 1 16 x 20 x 1 24 x 20 x 1 Filter Bulk Pack 1PF0601BK 1PF0601BK 1PF0601BK 1PF0604BK

HP 1 HP 1 HP 1 HP 1 HP Nominal RPM 1075 1075 1075 1075

Type DISPOSABLE OR PERMANENT

1

Size 20 x 20 x 1 20 x 20 x 1 24 x 20 x 1 24 x 20 x 1 Filter Bulk Pack 1PF0602BK 1PF0602BK 1PF0604BK 1PF0604BK

Electrical Data - Cooling Only (60 Hz) - 208/230

Models

MA

Total Motor Amps Minimum Circuit Ampacity

60 Hertz 60 Hertz

208V230V208V230V

Max. O.C.P.

Amps/Type

1

Minimum Wire

Size A.W.G.

08BN21 1.4 1.5 1.8 1.9 15 14 12BN21 2.1 3.5 2.6 3.0 15 14 14DN21 3.3 2.4 4.1 4.4 15 14 16CN21 3.6 4.0 4.5 5.0 15 14 20DN21 4.8 7.4 6.0 6.5 15 14

TABLE 9:

Electrical Data - Cooling Only (60 Hz) - 460

Models

MA

Total Motor Amps Minimum Circuit Ampacity

60 Hertz 60 Hertz

Max. O.C.P.

Amps/Type

1

Minimum Wire

Size A.W.G.

12BN41 2.3 3.5 15 14 16CN41 2.6 3.9 15 14 20DN41 3.7 5.6 15 14

1. OCP = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.

TABLE 10:

Conversion Table

KW & MBH Conversions - for Total Power Input Requirement

FOR

208V 230V 240V .918

OPERATION MULTIPLY

240V

.751

TABULATED KW & MBH BY

220V 240V .840

9

TABLE 11:

Electrical Data - 1 Ø - 208/230-1-60

Models

MA

Heat Kit - Single

Phase

4HK*6500206 0.5 Lo 1.9 2.5 6.4 8.5 1.9 2.5 1.9 2.5 1.9 2.5 4HK*6500506 0.5 Lo 3.6 4.8 12.3 16.4 3.6 4.8 3.6 4.8 3.6 4.8

08BN21

4HK*6500806 0.5 Med 5.6 7.5 19.2 25.6 2.8 3.75 5.6 7.5 5.6 7.5 4HK*6501006 0.5 Hi 7.2 9.6 24.6 32.8 3.6 4.8 7.2 9.6 7.2 9.6

4HK16501306 0.5 Hi 9.8 13.0 33.3 44.4 3.3 4.3 6.5 8.6 9.8 13.0

4HK*6500506 0.5 Lo 3.6 4.8 12.3 16.4 3.6 4.8 3.6 4.8 3.6 4.8 4HK*6500806 0.5 Med 5.6 7.5 19.2 25.6 2.8 3.75 5.6 7.5 5.6 7.5

12BN21

4HK*6501006 0.5 Med 7.2 9.6 24.6 32.8 3.6 4.8 7.2 9.6 7.2 9.6

4HK16501306 0.5 Med 9.8 13.0 33.3 44.4 3.3 4.3 6.5 8.6 9.8 13.0

4HK165N1506 0.5 Med 10.8 14.4 36.9 49.1 3.6 4.8 7.2 9.6 10.8 14.4

4HK*6500506 0.5 Lo 3.6 4.8 12.3 16.4 3.6 4.8 3.6 4.8 3.6 4.8 4HK*6500806 0.5 Lo 5.6 7.5 19.2 25.6 2.8 3.75 5.6 7.5 5.6 7.5

14DN21

4HK*6501006 0.5 Med 7.2 9.6 24.6 32.8 3.6 4.8 7.2 9.6 7.2 9.6 4HK16501506 0.5 Med 10.8 14.4 36.9 49.1 3.6 4.8 7.2 9.6 10.8 14.4 4HK16501806 0.5 Hi 13.2 17.6 45.1 60.1 3.3 4.4 6.6 8.8 13.2 17.6 4HK16502006 0.5 Hi 14.4 19.2 49.2 65.5 3.6 4.8 7.2 9.6 14.4 19.2

4HK*6500506 0.5 Lo 3.6 4.8 12.3 16.4 3.6 4.8 3.6 4.8 3.6 4.8

4HK*6500806 0.5 Lo 5.6 7.5 19.2 25.6 2.8 3.75 5.6 7.5 5.6 7.5

4HK*6501006 0.5 Med 7.2 9.6 24.6 32.8 3.6 4.8 7.2 9.6 7.2 9.6

16CN21

4HK16501306 0.50 Med 9.8 13 33.3 44.4 3.3 4.3 6.5 8.7 9.8 13.0 4HK16501506 0.5 Med 10.8 14.4 36.9 49.1 3.6 4.8 7.2 9.6 10.8 14.4 4HK16501806 0.5 Hi 13.2 17.6 45.1 60.1 3.3 4.4 6.6 8.8 13.2 17.6 4HK16502006 0.5 Hi 14.4 19.2 49.2 65.5 3.6 4.8 7.2 9.6 14.4 19.2

4HK*6500806 0.5 Lo 5.6 7.5 19.2 25.6 2.8 3.75 5.6 7.5 5.6 7.5

4HK*6501006 0.5 Lo 7.2 9.6 24.6 32.8 3.6 4.8 7.2 9.6 7.2 9.6 4HK16501306 0.50 Med 9.8 13 33.3 44.4 3.3 4.3 6.5 8.7 9.8 13.0

20DN21

4HK16501506 0.5 Med 10.8 14.4 36.9 49.1 3.6 4.8 7.2 9.6 10.8 14.4 4HK16501806 0.5 Med 13.2 17.6 45.1 60.1 3.3 4.4 6.6 8.8 13.2 17.6 4HK16502006 0.5 Med 14.4 19.2 49.2 65.5 3.6 4.8 7.2 9.6 14.4 19.2 4HK16502506 0.5 Med 18.0 24.0 61.5 81.9 3.6 4.8 10.8 14.4 18.0 24.0

1. See conversion Table 10. * May be 0 (no breaker) or 1 (with breaker).

Max.

Static

Min.

Speed

Tap

Total Heat

1

KW Staging

KW MBH W1 Only W2 Only W1 + W2

208V 240V 208V 240V 208V 240V 208V 240V 208V 240V

TABLE 12:

Electrical Data - (For

Multi-Source

Power Supply) - Copper Wire 1 Ø - 208/230-1-60

Min. Circuit Ampacity

Models

MA

Heater

Model

1st 2nd 3rd 1st 2nd 3rd 1st 2nd 3rd

Circuit Circuit Circuit

208/240 208/240 208/240 208/240 208/240 208/240 208/240 208/240 208/240

12BN21

4HK16501306 41.8/49.5 19.5/22.5 – 45/50 20 / 25 – 8/8 10/10 – 4HK165N1506 47.5/54.4 21.7/25.0 – 50/60 25 / 25 – 8/6 10/10 – 4HK16501506 47.8/55.0 21.7/25.0 – 50/60 25 / 25 – 8/6 10/10 –

14DN21

4HK16501806 44.2/50.8 39.7/45.8 – 50/60 40 / 50 – 8/6 8/8 – 4HK16502006 47.8/55.0 43.3/50.0 – 50/60 45 / 50 – 8/6 8/8 – 4HK16501306 42.2/48.9 22.9/26.0 – 50/50 30/30 – 6/6 12/10 –

16CN21

4HK16501506 47.8/55.0 21.7/25.0 – 50/60 25 / 25 – 8/6 10/10 – 4HK16501806 44.2/50.8 39.7/45.8 – 50/60 40 / 50 – 8/6 8/8 – 4HK16502006 47.8/55.0 43.3/50.0 – 50/60 45 / 50 – 8/6 8/8 – 4HK16501306 43.5/49.9 24.2/27.0 – 50/50 30/30 – 6/6 10/10 – 4HK16501506 49.3/56.5 21.7/25.0 – 50/60 25 / 25 – 8/6 10/10 –

20DN21

4HK16501806 45.7/52.3 39.7/45.8 – 50/60 40 / 50 – 8/6 8/8 – 4HK16502006 49.3/56.5 43.3/50.0 – 50/60 45 / 50 – 8/6 8/8 – 4HK16502506 49.3/56.5 43.3/50.0 21.7/25.0 50/60 45 / 50 25/25 8/6 8/8 10/10

1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.

10

Max. O.C.P.

1

Amps/Type

75°C Wire Size - AWG

TABLE 13:

Electrical Data - (For

Models

MA

Single Source

Heat Kit - Single

Phase*

Power Supply) - Copper Wire 1 Ø - 208/230-1-60

Heater

Amps

Min. Circuit Ampacity

240V 208V 240V 208V 240V 208V 240V

4HK*6500206 10.4 13.03 14.88 15 15 14 14

4HK*6500506 20.0 23.42 26.88 30 30 10 10

08BN21

4HK*6500806 31.3 35.60 41.00 40 45 8 8

4HK*6501006 40.0 45.08 51.88 50 60 8 6

4HK16501306 54.2 60.4 69.6 70 70 4 4

4HK*6500506 20.0 25.79 29.38 30 30 10 10

4HK*6500806 31.3 37.98 43.50 40 45 8 8

12BN21

4HK*6501006 40.0 47.46 54.38 50 60 8 6

4HK16501306 54.2 61.3 72.1 70 90 4 3

4HK165N1506 60.0 69.13 79.38 70 90 4 3

4HK*6500506 20.0 24.29 28.00 30 30 8 10

4HK*6500806 31.3 36.48 42.13 40 45 8 8

14DN21

4HK*6501006 40.0 45.96 53.00 50 60 8 6

4HK16501506 60.0 67.63 78.00 70 90 4 3

4HK16501806 73.3 82.07 94.63 90 100 4 3

4HK16502006 80.0 89.29 103.00 100 110 3 2

4HK*6500506 20.0 26.17 30.00 30 30 8 8

4HK*6500806 31.3 38.35 44.13 40 45 8 8

4HK*6501006 40.0 47.83 55.00 50 60 8 6

16CN21

4HK16501306 54.2 65.2 74.80 70 80 4 2

4HK16501506 60.0 69.50 80.00 70 90 4 3

4HK16501806 73.3 83.94 96.63 90 100 4 3

4HK16502006 80.0 91.17 105.00 100 110 3 2

4HK*6500806 31.3 42.60 48.38 45 50 8 8

4HK*6501006 40.0 52.08 59.25 60 60 8 6

4HK16501306 54.2 67.7 77.00 70 80 4 2

20DN21

4HK16501506 60.0 73.75 84.25 90 90 3 3

4HK16501806 73.3 88.19 100.88 90 110 3 2

4HK16502006 80.0 95.42 109.25 100 125 3 2

4HK16502506 100.0 117.08 134.25 125 150 1 1/0

1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse. * May be 0 (no breaker) or 1 (with breaker).

Field Wiring

Max. O.C.P.

1

Amps/Type

75°C Wire Size - AWG

TABLE 14:

Electrical Data - 3 Ø - 208/230-3-60

Models

MA

Heat Kit -

Three Phase

Max.

Static

Min.

Speed

Tap

Total Heat

1

KW Staging

KW MBH W1 Only W2 Only W1 + W2

208V 240V 208V 240V 208V 240V 208V 240V 208V 240V

08B 4HK06501025 0.5 Hi 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6

12B

4HK06501025 0.5 Med 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6

4HK065N1525 0.5 Hi 10.8 14.4 36.9 49.1 10.8 14.4 10.8 14.4 10.8 14.4

4HK06501025 0.5 Med 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6

14D

4HK06501525 0.5 Med 10.8 14.4 36.9 49.1 10.8 14.4 10.8 14.4 10.8 14.4

4HK06501825 0.5 Hi 12.9 17.2 44.7 58.7 12.9 17.2 12.9 17.2 12.9 17.2

4HK06501025 0.5 Med 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6

16C

4HK06501525 0.5 Med 10.8 14.4 36.9 49.1 10.8 14.4 10.8 14.4 10.8 14.4

4HK06501825 0.5 Hi 12.9 17.2 44.7 58.7 12.9 17.2 12.9 17.2 12.9 17.2

4HK06501025 0.5 Lo 7.2 9.6 24.6 32.8 7.2 9.6 7.2 9.6 7.2 9.6

20D

4HK06501525 0.5 Med 10.8 14.4 36.9 49.1 10.8 14.4 10.8 14.4 10.8 14.4

4HK16501825 0.5 Med 12.9 17.2 44.7 58.7 12.9 17.2 12.9 17.2 12.9 17.2

4HK16502525 0.5 Med 18.0 24.0 61.4 81.4 9.0 12.0 18.0 24.0 18.0 24.0

1. See conversion Table 10.

11

TABLE 15:

Electrical Data - (For

Multi-Source

Power Supply) - Copper Wire 3 Ø - 208/230-3-60

Min. Circuit Ampacity

Models

MA

Heater Model

1st 2nd 3rd 1st 2nd 3rd 1st 2nd 3rd

Circuit Circuit Circuit

208/240 208/240 208/240 208/240 208/240 208/240 208/240 208/240 208/240

20D

1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.

4HK16501825 31.1/35.1 22.4/25.9 – 35/40 25/35 – 8/8 10/10 – 4HK16502525 40.0/45.4 31.3/36.1 – 40/50 35/40 – 8/8 8/8 –

Max. O.C.P.

1

Amps/Type

75°C Wire Size - AWG

TABLE 16:

Electrical Data - (For

Models

MA

Single Source

Heat Kit -

Three Phase

Power Supply) - Copper Wire 3 Ø - 208/230-3-60

Heater

Amps

240V

Min. Circuit Ampacity

Max. O.C.P.

208V 240V 208V 240V 208V 240V

Field Wiring

1

Amps/Type

75°C Wire Size - AWG

08B 4HK06501025 23.1 26.8 30.8 30 35 10 8

12B

4HK06501025 23.1 27.6 31.9 30 35 10 8

4HK065N1525 34.7 40.1 47.8 45 50 8 8

4HK06501025 23.1 29.1 33.3 30 35 10 8

14D

4HK06501525 34.7 41.6 46.4 45 50 8 8 4HK06501825 41.4 48.9 56.1 50 60 8 6 4HK06501025 23.1 29.5 33.9 30 35 10 8

16C

4HK06501525 34.7 42.0 48.4 45 50 8 8 4HK06501825 41.4 49.3 56.8 50 60 6 6

20D

1. O.C.P. = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.

2. Heaters are 3 Phase.

TABLE 17:

Electrical Data - 460-3-60

MA

Models

4HK06501025 23.1 33.8 38.1 35 40 8 8 4HK06501525 34.7 43.5 52.6 45 60 8 6

Heater

Models

MAX. STATIC & MIN. CFM

Static Taps 480V 480V 480V 480V 480V

Total Heat1 KW Staging

KW MBH W1 Only W2 Only W1 + W2

12BN41 4HK06501046 0.5” Med 9.6 3.28 9.6 9.6 9.6

16CN41

4HK06501046 0.5” Med 9.6 3.28 9.6 9.6 9.6 4HK06501546 0.5” Med 14.4 4.92 14.4 14.4 14.4 4HK06501046 0.5” Med 9.6 3.28 9.6 9.6 9.6

20DN41

4HK06501546 0.5” Med 14.4 4.92 14.4 14.4 14.4 4HK06502946 0.5” Med 28.8 9.84 14.4 28.8 28.8

TABLE 18:

Electrical Data - (For

MA

Models

Single Source

Heater

Models

Power Supply) - Copper Wire 3 Ø - 460-3-60

Min. Circuit Ampacity Max. O.C.P.

480V 480V 480V

12BN41 4HK06501046 17.4 20 12

16CN41

4HK06501046 17.8 25 10 4HK06501546 24.9 25 10 4HK06501046 19.1 25 10

20DN41

4HK06501546 26.3 30 8 4HK06502946 48.0 50 8

1. OCP = Over Current Protection device, must be HACR type Circuit Breaker or Time Delay fuse.

12

Field Wiring

1

Amps/Type

Wire Size - AWG

75°C

TABLE 19:

Air Flow Data - 60 Hz Models (230 & 460 Volt)

230 / 460 Volt - 60 Hz

Models

MA

08B

12B

14D

16C

20D

1. Includes return air filter, coil, and 10kW electric heater. All MA series air handler units are UL Listed up to 0.50" w.c. external static pressure, including air filter, wet coil, and largest KW size heater.

ModelsMCBlower Motor

Speed

High 1102 986 870 754 638

MC18B

Med. 831 737 644 551 457

Low 615 537 458 379 300

High 1112 1001 890 780 669

MC24B

Med. 851 759 667 576 484

Low 643 562 480 399 317

MC30B MC35B

High 1429 1363 1290 1212 1133 Med. 1213 1153 1097 1037 977

Low 1075 1032 990 927 873

High 1607 1533 1463 1395 1319

MC36B

Med. 1308 1258 1197 1146 1097

Low 1148 1108 1061 1017 976

High 1462 1396 1322 1254 1172

MC43B

Med. 1205 1154 1102 1046 980

Low 1075 1020 969 906 842

High 1715 1671 1608 1547 1460

MC48D

Med. 1471 1438 1367 1318 1263

Low 1379 1330 1276 1227 1157

High 1763 1713 1649 1581 1511

MC60D

Med. 1487 1462 1412 1356 1280

Low 1381 1353 1292 1225 1186

High 1746 1699 1655 1579 1486

MC62D

Med. 1486 1442 1393 1333 1270

Low 1392 1336 1285 1226 1158

High 1959 1874 1802 1708 1606

MC42C

Med. 1631 1587 1542 1473 1395

Low 1447 1431 1401 1363 1304

MC43C MC35C

High 1825 1742 1660 1578 1486 Med. 1637 1572 1507 1431 1361

Low 1510 1456 1403 1341 1278

High 2018 1895 1772 1649 1525

MC48C

Med. 1684 1595 1506 1417 1328

Low 1561 1476 1392 1308 1223

High 1830 1748 1670 1590 1518

MC60C

Med. 1638 1573 1510 1443 1370

Low 1522 1479 1426 1364 1314

High 2226 2190 2103 2035 1931

MC48D

Med. 2115 2087 2017 1951 1851

Low N/A N/A N/A 1716 1643

High 2326 2235 2192 2107 2027

MC60D

Med. 2150 2089 2036 2008 1944

Low 2012 1923 1834 1718 1676

High 2357 2321 2254 2191 2139

MC62D

Med. 2212 2144 2111 2069 1986

Low 2066 1934 1910 1817 1723

1

@ External Static Pressure - IWC

CFM

0.1 0.2 0.3 0.4 0.5

0.6 0.7 0.8 0.9 1 521 405 289 173 57 364 271 178 84 N/A 221 142 63 N/A N/A 558 447 336 225 114 392 300 208 116 25 236 154 73 N/A N/A

1037 929 670 534 375

896 697 549 453 220 770 611 494 405 212

1044 851 725 673 673

887 742 648 608 609 807 690 613 582 582

1067 941 693 585 464

897 704 560 441 220 735 592 470 364 190

1338 1232 1003 727 508 1180 920 824 587 503 1047 866 681 567 392 1407 1276 995 852 N/A 1210 1087 795 726 N/A 1057 863 780 669 N/A 1399 1264 1093 796 581 1189 1081 776 628 450 1061 882 740 680 445 1486 1408 1264 953 810 1315 1218 967 821 533 1241 1098 844 751 712 1396 1306 1187 802 577 1276 1171 1043 722 493 1202 1088 785 684 456 1402 1279 1156 1033 910 1240 1151 1062 973 884 1139 1055 970 896 801 1428 1320 1199 772 543 1289 1185 992 679 475 1218 1114 885 652 487 1845 1683 1541 1465 1328 1744 1542 1466 1406 1254 1554 1451 1379 1292 1151 1906 1786 1538 1469 1368 1852 1692 1499 1416 1295 1600 1447 1389 1311 1200 1951 1859 1656 1556 1472 1862 1727 1566 1498 1369 1646 1514 1442 1381 1245

13

TABLE 20:

Air Flow Data - 60 Hz Models (208 Volt)

208 Volt - 60 Hz

Models

MA

08B

12B

14D

16C

20D

1. Includes return air filter, coil, and 10kW electric heater. All MA series air handler units are UL Listed up to 0.50" w.c. external static pressure, including air filter, wet coil, and largest KW size heater.

ModelsMCBlower Motor

Speed

High 1080 964 848 732 615

MC18B

Med. 712 628 544 461 377

Low 529 452 376 299 223

High 1039 932 825 717 610

MC24B

Med. 743 659 575 491 407

Low 532 460 387 315 242

MC30B MC35B

High 1399 1339 1267 1192 1098 Med. 1080 1039 994 943 876

Low 932 895 868 829 776

High 1434 1267 1099 932 764

MC36B

Med. 1083 955 827 699 571

Low 933 818 703 588 473

High 1444 1377 1311 1247 1172

MC43B

Med. 1086 1047 1005 959 905

Low 942 920 887 827 768

High 1549 1498 1448 1383 1325

MC48D

Med. 1275 1269 1225 1181 1115

Low 1190 1162 1112 1074 975

High 1545 1490 1463 1378 1337

MC60D

Med. 1266 1248 1207 1140 1101

Low 1192 1186 1126 1067 992

High 1564 1520 1455 1400 1336

MC62D

Med. 1303 1262 1225 1165 1117

Low 1204 1161 1104 1060 1001

High 1782 1712 1619 1524 1435

MC42C

Med. 1468 1415 1355 1298 1233

Low 1310 1278 1239 1185 1125

MC35C MC43C

High 1771 1705 1619 1528 1450 Med. 1486 1445 1393 1325 1265

Low 1314 1300 1258 1214 1164

High 1983 1865 1747 1629 1511

MC48C

Med. 1529 1446 1363 1280 1197

Low 1312 1249 1185 1122 1059

High 1819 1738 1657 1570 1491

MC60C

Med. 1489 1452 1409 1349 1293

Low 1321 1310 1271 1233 1184

High 2250 2180 2139 2062 1971

MC48D

Med. 1953 1956 1905 1858 1755

Low N/A N/A 1544 1538 1455

High 2251 2186 2144 2073 2003

MC60D

Med. 1987 1945 1926 1887 1836

Low 1492 1517 1521 1523 1507

High 2208 2123 2092 2054 1910

MC62D

Med. 1959 1945 1913 1862 1766

Low N/A N/A N/A 1546 1491

1

@ External Static Pressure - IWC

CFM

0.1 0.2 0.3 0.4 0.5

0.6 0.7 0.8 0.9 1 499 383 267 150 34 293 210 126 42 N/A 146 70 N/A N/A N/A 502 395 288 180 73 323 239 156 72 N/A 169 97 24 N/A N/A

1023 915 673 534 377

778 639 525 415 211 656 543 447 351 214 597 430 262 95 N/A 443 315 187 59 N/A 359 244 129 14 N/A

1091 971 721 573 442

819 647 534 438 220 655 536 477 366 209

1235 1125 936 658 548

997 811 684 548 392 817 737 625 493 358

1231 1115 850 739 572 1005 839 687 564 469

842 740 638 507 347

1257 1154 813 755 549 1028 827 744 590 398

870 745 554 532 462

1323 1213 985 798 557 1144 1005 791 669 493 1045 934 725 561 424 1361 1261 1102 721 504 1198 1041 791 663 457 1108 891 753 550 410 1393 1275 1157 1039 921 1114 1031 948 865 782

995 932 868 805 742

1396 1289 1178 777 544 1207 1112 834 627 475 1120 1022 725 583 419 1855 1683 1553 1461 1342 1649 1528 1440 1355 1245 1401 1346 1285 1195 1081 1921 1809 1574 1478 1370 1761 1643 1472 1387 1213 1436 1379 1308 1213 1128 1762 1595 1496 1435 1298 1661 1513 1420 1315 1182 1407 1354 1258 1184 1088

14

FIGURE 11: Cooling Models with Electric Heat Wiring

MA SERIES - Air Handler Control Wiring

Typical A/C - Cooling only Applications

THERMOSTAT

AIR HANDLER

BOARD

1-STAGE

AIR CONDITIONING

RR

G

Y

W1

W2

C

G

W1

W2

Y

C

Y/Y2

Y1

O

HUM

X/L

COM

HUMIDISTAT

*

THERMOSTAT

AIR HANDLER

BOARD

1-STAGE

AIR CONDITIONING

RR

G

Y

W1

W2

C

G

W1

W2

Y

C

Y/Y2

Y1

O

HUM

X/L

COM

HUMIDISTAT

*

MA SERIES - Air Handler Control Wiring

Typical A/C with Electric Heat Applications

* Optional dehumidification humidistat switch contacts open on humidity rise. Notes:

1. “Y” Terminal on Air Handler Control Board must be connected for full CFM and applications requiring 60 second blower off delay for SEER enhancement.

2. Move HUM STAT Jumper on AH Control Board to YES position if Humidistat is used.

3. MODE Jumper on AH control board should be set to A/C for air conditioners.

CONTROL WIRING - AHP or MA Series Air Handler

And Newer UPG Single Stage HP Systems

Single Stage H/P with Standard Demand Defrost Control Board

THERMOSTAT

R

G

Y

AIR HANDLER

BOARD

R

G

Y/Y2

HEAT PUMP

R

Y

Y1

W2

E

W/W1

O

X/L

C

W2

W1

O

HUM

X/L

COM

HUMIDISTAT

W1 66

W

O

*

X/L

C

FIGURE 12: Single-Stage Cooling Wiring

* Optional dehumidification humidistat switch contacts open on rise. Notes:

1. “Y” Terminal on Air Handler Control Board must be connected for full CFM and applications requiring 60 second blower off delay for SEER enhancement.

2. Move HUM STAT Jumper on AH Control Board to YES position if Humidistat is used.

3. MODE Jumper on AH control board should be set to HP for heat pumps.

4. To change quantity of heat during HP defrost cycle - Reverse connections at W1 & W2 on Air Handler Control Board.

SECTION X: 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.

15

LUBRICATION

The bearings of the blower motor are permanently lubricated.

SECTION XI: WIRING DIAGRAM

Thermo Products, LLC 5235 West State Road 10 North Judson, IN 46366 www.thermopride.com

FIGURE 13: Wiring Diagram

MODULAR

INSTALLATION MANUAL

MAC-226 ECN 5287-MA 121005

VARIABLE SPEED AIR HANDLERS

MODELS: MV

LIST OF SECTIONS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

UNIT INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ELECTRIC HEATER INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 5

LOW VOLTAGE CONTROL CONNECTIONS . . . . . . . . . . . . . . . . . . 5

REQUIRED CONTROL SET-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

LIST OF FIGURES

Typical Installation with MC or FC Evaporator Coil . . . . . . . . . . . . . . .3

Coil and Air Handler Attachment Details . . . . . . . . . . . . . . . . . . . . . . .3

Gasket Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Dimensions & Duct Connection Dimensions . . . . . . . . . . . . . . . . . . . . 4

Typical Horizontal Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Air Handler Control Board – Communications Connections . . . . . . . .6

LIST OF TABLES

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Low Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Fault Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Heat Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Comfort Setting Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Physical and Electrical Data - Cooling Only (60 Hz) . . . . . . . . . . . . . 11

Electrical Data - Cooling Only (60 Hz) . . . . . . . . . . . . . . . . . . . . . . . . 11

Conversion Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Electrical Data - 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . 12

Electrical Data - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ISO 9001

Certified Quality

Management System

LINE POWER CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

AIRFLOW AND COMFORT SETTING SELECTION . . . . . . . . . . . . 10

UNIT DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Cooling Models with and without Electric Heat Wiring . . . . . . . . . . . . 7

Two-Stage Heat Pump Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Air Handler with Communicating AC or HP . . . . . . . . . . . . . . . . . . . . 8

Line Power Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Electrical Data - (For Single Source Power Supply) -

Copper Wire 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Electrical Data - (For Single Source Power Supply) -

Copper Wire - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Electrical Data - (For Multi-Source Power Supply) -

Copper Wire 1 Ø - 208/230-1-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Electrical Data - (For Multi-Source Power Supply) -

Copper Wire - 208/230-3-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Air Handler Air Flow Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

SECTION I: GENERAL

This modular air handler provides the flexibility for installation in any upflow, downflow, or horizontal application. These versatile models may be used for cooling or heat pump operation with or without electric heat.

A BRAND LABEL (available from Distribution) may be applied to the center of the blower access panel.

The unit can be positioned for bottom return air in the upflow position, top return air in the downflow position, and right or left return in the horizontal position.

Top and side power wiring and control wiring, accessible screw terminals for control wiring and easy to install electric heaters all combine to make the installation easy, and minimize installation cost.

SECTION II: SAFETY

This is a safety alert symbol. When you see this symbol on labels or in manuals, be alert to the potential for personal injury.

Understand and pay particular attention to the signal words DANGER,

WAR NIN G, or CAUTION.

DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or serious injury

WAR NIN G indicates a potentially hazardous situation, which, if not avoided, could result in death or serious injury

CAUTION indicates a potentially hazardous situation, which, if not

avoided may result in minor or moderate injury. alert against unsafe practices and hazards involving only property damage.

.

It is also used to

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 maintenance can cause injury or property damage. Refer to this manual for assistance or for additional information, consult a qualified contractor, installer or service agency.

This product must be installed in strict compliance with the installation instructions and any applicable local, state, and national codes including, but not limited to building, electrical, and mechanical codes.

FIRE OR ELECTRICAL HAZARD Failure to follow the safety warnings exactly could result in serious injury, death or property damage. A fire or electrical hazard may result causing property damage, personal injury or loss of life.