Bard Q24H2DB, Q24H2DC, Q30H2DB, Q30H2DA, Q30H2DC Installation Instructions Manual

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INSTALLATION INSTRUCTIONS

Q-TECTM SERIES

PACKAGED HEAT PUMP

Models:

Q24H2DA Q24H2DB Q24H2DC

Q30H2DA Q30H2DB Q30H2DC

Q36H2DA Q36H2DB Q36H2DC

Q42H2DA Q42H2DB Q42H2DC

Q48H2DA Q48H2DB Q48H2DC

Q60H2DA Q60H2DB Q60H2DC

Bard Manufacturing Company, Inc. Bryan, Ohio 43506

www.bardhvac.com

Manual No.: 2100-603B Supersedes: 2100-603A Date: 8-3-16

Page 1 of 44

CONTENTS

Getting Other Information and Publications

For more information, contact these publishers: .......... 3

Q-TEC General Information

Q-TEC Model Nomenclature ...................................... 4

Shipping Damage ..................................................... 7

Unit Removal From Skid ........................................... 7

Handling Unit After Removal From Skid ..................... 8

General ................................................................... 8

Minimum Installation Height ..................................... 8

Duct Work.............................................................. 10

Filters ................................................................... 10

Fresh Air Intake ..................................................... 11

Service Light .......................................................... 11

Condensate Drain ................................................... 11

Optional Rear Drain Kit ........................................... 11

Installation

Mounting the Unit .................................................. 18

Wiring – Main Power ..............................................19

Wiring – Low Voltage Wiring .................................... 19

Optional Climate Controls Seq. of Op. .............19 & 20

Low Voltage Connections ......................................... 20

General ................................................................. 21

Start Up

R-410A Refrgerant ................................................. 27

Topping Off System Charge ..................................... 27

Safety Practices ..................................................... 27

Description of Standard Equipment .......................... 28

Optional CFM (

Q36H2D, Q42H2D, Q48H2D & Q60H2D Only

Important Installer Note .......................................... 28

Phase Monitor ........................................................ 28

Three Phase Scroll Compressor Start Up Information . 28

Service Hints ......................................................... 29

Mist Eliminator Service ........................................... 29

Vent Options .......................................................... 30

Sequence of Operation ............................................ 33

Refrigerant Tube Schematic for Reheat Coil .............. 34

Pressure Service Ports ............................................ 35

Defrost Cycle ......................................................... 36

Troubleshooting

Troubleshooting Solid State HP Control ....................38

Checking Temperature Sensor ..................................39

Troubleshooting ECM™ Blower Motors ................40-41

Fan Blade Setting Dimensions ................................. 42

Refrigerant Charge .................................................. 42

Pressure Charts .............................................. 43 & 44

) ............ 28

Figures

Figure 1 Unit Dimensions ....................................... 6

Figure 2 Air Seal Under Unit ................................... 7

Figure 3 Removal of Unit From Skid ........................ 7

Figure 4 Unit on Appliance Cart for Moving .............. 8

Figure 5 Installation With Duct Free Plenum ............. 9

Figure 6 Ducted Application .................................... 9

Figure 7 Supply Duct Connections ......................... 10

Figure 8 Filter Location ........................................ 10

Figure 9 Optional Side Drain ................................. 12

Figure 10 Standard Rear Drain ................................ 12

Figure 11 Rear Drain (Top View) .............................. 12

Figure 12A Figure 12B Figure 12C Figure 12D Figure 13A

Figure 13B

Figure 14 Removing Locking Screws from Wheels ..... 18

Figure 15 Component Location ................................ 19

Figure 16 Thermostat Plug Terminals ....................... 21

Figure 17 Thermostat Wiring Diagram "X" Option ...... 22

Figure 18

Figure 19 Thermostat Wiring Diagram "E" Option ..... 24

Figure 20 T-Stat Wiring Diagram "I" Option .............. 25

Figure 21 T-Stat Wiring Diagram "J or K" Opt. ......... 26

Figure 22 Fresh Air Damper Removal ....................... 31

Figure 23 QERV Removal ........................................ 32

Figure 24 CO

Optional Rear Drain Kit............................ 13

Optional Rear Drain Kit............................ 14

Optional Rear Drain Kit............................ 15

Optional Rear Drain Kit............................ 16

Unit Mounting ........................................ 17

T-Stat Diagram "X" Opt. & Demand Vent. .......

Controller ......................................... 33

Figure 25 A/C Mode Circuit Diagram ........................ 34

Figure 26 Dehum. Mode Circuit Diagram .................. 35

Figure 27 Defrost Control Board .............................. 37

Figure 28 Control Disassembly ................................ 41

Figure 29 Winding Test ........................................... 41

Figure 30 Drip Loop ............................................... 41

Figure 31 Fan Blade Setting ................................... 42

Tables

Table 1 Factory Built-In Electric Heat Table .............. 4

Table 2 Electrical Speciﬁcations.............................. 5

Table 3 Operating Voltage Range ........................... 19

Table 4 Wall Thermostats ..................................... 21

Table 5 Troubleshooting ........................................ 38

Table 6 Temp. vs Resistance of Temp. Sensor ......... 39

Table 7 Fan Blade Dimensions .............................. 42

Table 8 Subcooling @ Liquid Line ......................... 42

Table 9 Indoor Blower Performance ....................... 42

Table 10 Cooling Pressure ...................................... 43

Table 11 Heating Pressure ...................................... 44

Table 12 Dehum. Relay Logic Board ........................ 44

Manual 2100-603B Page 2 of 44

GETTING OTHER INFORMATION AND PUBLICATIONS

These publications can help you install the air conditioner or heat pump. You can usually ﬁnd these at your local library or purchase them directly from the publisher. Be sure to consult current edition of each standard.

National Electrical Code ..................... ANSI/NFPA 70

Standard for the Installation ............. ANSI/NFPA 90A

of Air Conditioning and Ventilating Systems

Standard for Warm Air ...................... ANSI/NFPA 90B

Heating and Air Conditioning Systems

Load Calculation for ...................... ACCA Manual J or

Winter and Summer Manual N Air Conditioning

Low Pressure, Low Velocity ............ ACCA Manual D or

Duct System Design Manual Q Winter and Summer Air Conditioning

FOR MORE INFORMATION, CONTACT THESE PUBLISHERS:

ACCA Air Conditioning Contractors of America

1712 New Hampshire Avenue Washington, DC 20009 Telephone: (202) 483-9370 Fax: (202) 234-4721

ANSI American National Standards Institute 11 West Street, 13th Floor New York, NY 10036 Telephone: (212) 642-4900 Fax: (212) 302-1286

ASHRAE American Society of Heating, Refrigeration, and Air Conditioning Engineers, Inc.

1791 Tullie Circle, N.E. Atlanta, GA 30329-2305 Telephone: (404) 636-8400 Fax: (404) 321-5478

NFPA National Fire Protection Association

Batterymarch Park P.O. Box 9101 Quincy, MA 02269-9901 Telephone: (800) 344-3555 Fax: (617) 984-7057

Manual 2100-603B Page 3 of 44

Q-TEC Series General Information

Q-TEC MODEL NOMENCLATURE

Q 36 H 2 D A 10 X X X X X X

MODEL NUMBER

Q-TEC™

CAPACITY

24 - 2 Ton 30 - 2½ Ton 36 - 3 Ton 42 - 3½ Ton 48 - 4 Ton 60 - 5 Ton

VENTILATION OPTIONS

X - Barometric Fresh Air Damper (Standard) B - Blank-off Plate V - Commercial Ventilator - Motorized w/Exhaust Spring Return P - Commercial Ventilator - Motorized w/Exhaust Power Return R - Energy Recovery Ventilator w/Independent Intake & Exhaust Control

HEAT

PUMP

REVISION

DEHUMIDIFICATION REHEAT CYCLE

VOLTS & PHASE

A - 230/208/60/1 B - 230/208/60/3 C - 460/60/3

0Z - 0KW 05 - 5KW 06 - 6KW 09 - 9KW 10 -10KW 12 -12KW 15 -15KW

FILTER OPTIONS

X - 1 inch Fiberglass (Standard) F - 2 inch Fiberglass P - 2 inch Pleated

COLOR

V - Platinum w/Slate Front (Vinyl) X - Beige paint 4 - Gray paint

CLIMATE CONTROL OPTIONS

X - None  E - Electronic/Prog/Man/Auto/Humidistat I - Electronic/Prog/Man/Auto with CO J - CS9BE-THO (BACnet IP or Ethernet) K - CS9BE-THOC with CO

COIL OPTIONS

X - Standard 1 - Phenolic coated

evaporator* 2 -

Phenolic coated

condenser 3 - Phenolic coated

evaporator and condenser coil*

*and reheat if applicable

(BACnet IP or Ethernet)

INTERNAL CONTROLS

X - Standard

• High Pressure Switch

• Low Pressure Switch

• Compressor Control Module w/Time Delay E - Low Ambient Control Q - Outdoor Thermostat R - Low Ambient Control

& Outdoor Thermostat

NOTE:  If “X” control option is selected, then thermostat and humidistat, if applicable, or DDC control system must be ﬁeld supplied.

TABLE 1

FACTORY BUILT-IN ELECTRIC HEAT TABLE

(See Table 2 for Available Electric Heat by Unit Model)

Nominal

5.0 5.0 20.8 17,065 3.75 18.0 12,799

6.0 6.0 14.4 20,478 4.50 12.5 15,359 6.0 7.2 20,478 5.52 6.9 18,840

9.0 9.0 21.7 30,717 6.75 18.7 23,038 9.0 10.8 30,717 8.28 10.4 28,260

10.0 10.0 41.7 34,130 7.50 36.1 25,598

12.0 12.0 28.9 40,956 9.00 25.0 30,717 12.0 14.4 40,956 11.04 13.9 37,680

15.0 15.0 62.5 36.1 51,195 11.25 54.1 31.2 38,396 15.0 18.0 51,195 13.80 17.3 47,099

 These electric heaters are available in 230/208V units only.  These electric heaters are available in 480V units only.

At 240V  At 208V  At 480V  At 460V 

1-Ph

Amps

3-Ph

Amps

BTUH KW

1-Ph

Amps

3-Ph

Amps

BTUH KW

3-Ph

Amps

BTUH KW

3-Ph

Amps

BTUH

Manual 2100-603B Page 4 of 44

TABLE 2 – ELECTRICAL SPECIFICATIONS

No.

Field

Power

Circuits

1 or 2

1 1 1

1 1

1 or 2

1 1 1 1

1 1 or 2 1 or 2

1 1 or 2 1 or 2 1 or 2



Minimum

Circuit

Ampacity

22 47 72

17 35 44

10 19 23

25 50 75

18 37 45 55

12 21 25 30

31 56 81 83

25 43 52 53

12 21 26 27

34 59 84 84

25 43 52 53

13 22 26 27

38 63 88 88

29 47 56 56

15 24 28 28

45 70 95 95

31 58 58

17 31 31

MODEL

Q24H2DA0Z

A05 A10

Q24H2DB0Z

B06 B09

Q24H2DC0Z

C06 C09

Q30H2DA0Z

A05 A10

Q30H2DB0Z

B06 B09 B12

Q30H2DC0Z

C06 C09 C12

Q36H2DA0Z

A05 A10

 A15

Q36H2DB0Z

B06 B09

 B15

Q36H2DC0Z

C06 C09

 C15

Q42H2DA0Z

A05 A10

 A15

Q42H2DB0Z

B06 B09

 B15

Q42H2DC0Z

C06 C09

 C15

Q48H2DA0Z

A05 A10

 A15

Q48H2DB0Z

B06 B09

 B15

Q48H2DC0Z

C06 C09

 C15

Q60H2DA0Z

A05 A10

 A15

Q60H2DB0Z

B09

 B15

Q60H2DC0Z

C09

 C15

Rated

Volts &

Phase

230/208-

460-3

230/208-

460-3

230/208-

460-3

230/208-

460-3

230/208-

460-3

230/208-

460-3

 Maximum size of the time delay fuse or circuit breaker for protection of ﬁeld wiring conductors.

 Based on 75°C copper wire. All wiring must conform to the National Electrical Code and all local codes.

 These “Minimum Circuit Ampacity” values are to be used for sizing the ﬁeld power conductors. Refer to the National Electric Code (latest

revision), article 310 for power conductor sizing.

CAUTION: When more than one ﬁeld power conductor circuit is run through one conduit, the conductors must be derated. Pay special attention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three conductors are in a raceway.

 Maximum KW that can operate with heat pump on is 10KW. Other 5KW energizes during emergency heating only.

 Maximum KW that can operate with heat pump on is 9KW. Other 6KW energizes during emergency heating only.

NOTE: Reference Form 7960-582 for dehumidiﬁcation model performance information.

Single Circuit Dual Circuit



Maximum

External

Fuse or Ckt.

Brkr.

30 50 80

20 35 45

15 20 25

35 50 80

25 40 45 60

15 25 25 30

45 60 90 90

30 50 60 60

15 25 30 30

50 60 90 90

35 50 60 60

15 25 30 30

50 70 90 90

40 50 60 60

20 25 30 30

90 100 100



Field

Power

Wire Size

8 4

8 8

14 12 10

8 8 4

8 8 6

14 10 10 10

8 6 4 4

8 6 6

14 10 10 10

8 6 4 4

8 8 6 6

14 10 10 10

8 6 3 3

8 8 6 6

12 10 10 10

8 4 3 3

8 6 6

8 8

 Minimum



Ground

Wire

10 10

8 22 50 30 50 10 8 10 10

12 10 10

14 12 10

10 10

8 25 50 30 50 10 8 10 10

10 10 10 10

14 10 10 10

10 10

8 8

10 10 10 10

14 10 10 10

10 10

8 8

10 10 10 10

14 10 10 10

8 8 8

10 10 10 10

12 10 10 10

8 8 8

10 10 10

Circuit

Ampacity

Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B Ckt. A Ckt. B

31335050454550

34345050454550

38 38 38

45 45 45

25 50 50

 Maximum

External Fuse or

Ckt. Breaker



Field Power

Wire Size

8 8

8 8 8

8 8



Ground

Wire Size

101010

10 10 10

Manual 2100-603B Page 5 of 44

10 10 10

FIGURE 1

Q24H2D

UNIT DIMENSIONS

Q30H2D

Q36H2D

Q42H2D

Q48H2D

Q60H2D

Manual 2100-603B Page 6 of 44

SHIPPING DAMAGE

Upon receipt of equipment, the carton should be checked for external signs of shipping damage. The skid must remain attached to the unit until the unit is ready for installation. If damage is found, the receiving party must contact the last carrier immediately, preferably in writing, requesting inspection by the carrier’s agent.

UNIT REMOVAL FROM SKID

WARNING

This unit is heavy and requires more than one person to handle and remove from the skid. Check unit wheels to ensure that wheels are locked before removing from skid. Extreme caution must be taken to prevent injury to personnel and damage to the unit.

FIGURE 2

AIR SEAL UNDER Q-TEC UNIT

Air Seal

It is recommended that the unit not be removed from the skid with a forklift since the air seal under the unit could be damaged. See Figure 2.

The shipping brackets on each side of the unit must be removed and discarded. See Figure 3-A. The return air grille panel can be removed to provide a place to hold the unit. The unit can be slid forward on the skid until the front wheels hang over the edge of the skid.

FIGURE 3

REMOVAL OF UNIT FROM SKID

See Figure 3-B. The unit can be tipped forward and slid down the edge of the skid until the front wheels touch the ground. See Figure 3-C. The wheels will not roll. They are shipped from the factory locked so they will not roll. The back of the skid will have to be held down to keep it from tipping up. The skid can be slid out from under the unit. The unit can then be set upright.

Hold Skid Down

A Shipping Brackets B Front Wheels Over Edge

C Front Wheels On Floor

Manual 2100-603B Page 7 of 44

HANDLING UNIT AFTER REMOVAL FROM SKID

WARNING

Exercise extreme caution when pushing the unit on the rollers. Handle and push from the lower 1/3 of the unit. Insure that debris is not

on the oor where the unit is to be moved on

the rollers. Failure to do so could result in the unit tipping over and causing bodily injury and/ or damage to the unit.

See Figure 4. The blade of the appliance cart should be slid under the wheels of the unit. The strap of the appliance cart should be placed around the unit and strapped tightly. Help will be required to tip the unit back onto the cart. The unit can be leaned far enough back to be rolled through the door. Be careful when setting the unit back up to keep from damaging the unit.

GENERAL

The equipment covered in this manual is to be installed by trained, experienced service and installation technicians.

The unit will have to be turned sideways and removed from the skid to ﬁt through a 36" doorway. If the door height allows, the unit can be slid sideways through the door.

If the unit can not be slid through the door, then the unit will have to be put on a cart and tipped down to roll through the door. It is recommended that an appliance cart by used with a strap to hold the unit on the cart. The wheels of the unit must be locked. If the wheels were allowed to roll, the unit could roll off the cart. The unit should always be carted from the left side. This is the side where the compressor is located.

FIGURE 4

UNIT ON APPLIANCE CART

Q-TEC UNIT

(Right Side)

STRAP

The unit is designed for use with or without duct work. For use without duct work, Plenum Box QPB42 is recommended.

These instructions explain the recommended method to install the air cooled self-contained unit and the electrical wiring connections to the unit.

These instructions and any instructions packaged with any separate equipment required to make up the entire air conditioning system should be carefully read before beginning the installation. Note particularly “Start Procedure” and any tags and/or labels attached to the equipment.

While these instructions are intended as a general recommended guide, they do not supersede any national and/or local codes in any way. Authorities having jurisdiction should be consulted before the installation is made. See Page 3 for information on codes and standards.

Size of unit for a proposed installation should be based on heat loss calculation made according to methods of Air Conditioning Contractors of America (ACCA). The air duct should be installed in accordance with the Standards of the National Fire Protection Systems of Other Than Residence Type, NFPA No. 90A, and Residence Type Warm Air Heating and Air Conditioning Systems, NFPA No. 90B. Where local regulations are at a variance with instructions, installer should adhere to local codes.

APPLIANCE CART

COMPRESSOR

Manual 2100-603B Page 8 of 44

MINIMUM INSTALLATION HEIGHT

The minimum installation height of the unit with a Free Blow Plenum is 8 ft. 6 in. This provides enough clearance for the plenum to be removed. See Figure 5.

The minimum installation height for ducted applications is 8 ft. 4½ in. This provides enough clearance to install the duct work. See Figure 6.

FIGURE 5

INSTALLATION WITH DUCT FREE PLENUM

FIGURE 6

DUCTED APPLICATION

Manual 2100-603B Page 9 of 44

DUCT WORK

Any heat pump is more critical of proper operating charge and an adequate duct system than a straight air conditioning unit. All duct work must be properly sized for the design airﬂow requirement of the equipment. Air Conditioning Contractors of America (ACCA) is an excellent guide to proper sizing. All duct work or portions thereof not in the conditioned space should be properly insulated in order to both conserve energy and prevent condensation or moisture damage. When duct runs through unheated spaces, it should be insulated with a minimum of one inch of insulation. Use insulation with a vapor barrier on the outside of the insulation. Flexible joints should be used to connect the duct work to the equipment in order to keep the noise transmission to a minimum.

The Q-TEC series heat pump has provision to attach a supply air duct to the top of the unit. Duct connection size is 12 inches x 20 inches. The duct work is ﬁeld supplied and must be attached in a manner to allow for ease of removal when it becomes necessary to slide the unit out from the wall for service. See Figure 7 for suggested attachment method.

FIGURE 7

SUPPLY DUCT CONNECTIONS

For hot water coil option a QPBHWxx-F for free blow or QPBHWxx-D for ducted airﬂow is used.

When used with a ducted supply, a QCX Cabinet Extension can be used to conceal the duct work above the unit to the ceiling. This extends 20" above the unit for a total height above the ﬂoor of 10'-7/8". The unit is equipped with a variable speed indoor blower motor which increases in speed with an increase in duct static pressure. The unit will therefore deliver proper rated airﬂow up to the maximum ESP shown in Table 9. However, for quiet operation of the air system, the duct static should be kept as low as practical, within the guidelines of good duct design.

FILTERS

Two 1-inch throw away ﬁlters [(1) 16x16 and (1) 16x20] are supplied with each unit. The ﬁlters slide into ﬁlter brackets. Refer to Figure 8.

The ﬁlters are serviced from the inside of the building by opening the hinged door. This door is attached by one torx screw and one locking latch.

The internal ﬁlter brackets are adjustable to accommodate 2-inch ﬁlters. The tabs for the 1-inch ﬁlters must be bent down to allow the 2-inch ﬁlters to slide in place.

SUPPLY DUCT TO BE FIELD SUPPLIED

ATTACHMENT SCREWS TO BE FIELD SUPPLIED

ROOM SIDE OF Q-TEC UNIT

DUCT FLANGE PROVIDED WITH UNIT

NOTE: Unit cabinet, supply air duct and duct free

plenum are approved for “0” clearance to combustible material.

The Q-TEC series heat pumps are designed for use with free return (non-ducted) and either free blow with the use of QPB Plenum Box or a duct supply air system.

The QPB and QPBHW Plenum Box mounts on top of the unit and has both vertically and horizontally adjustable louvers on the front discharge grille.

FILTERS

RETURN AIR GRILLE

FIGURE 8

FILTER LOCATION

Manual 2100-603B Page 10 of 44

FRESH AIR INTAKE

This unit is equipped with a fresh air damper assembly. The damper blade is locked in the closed position when the unit is shipped from the factory. To allow the damper to operate remove the two plastic locking pins, one on each end of the blade. This will allow for maximum fresh airﬂow. The damper blade will now open when the indoor blower is operating. If less than maximum fresh airﬂow is required, reinsert the plastic pins to limit damper blade opening to desired level. Two extra pins are provided (taped to the inside of the assembly) which may be used to hold the blade in some position other than minimum or maximum position. This fresh air assembly is located in the rear of the unit and to gain access to make these adjustments remove the air ﬁlter service door.

All capacity, efﬁciency and cost of operation information as required for Department of Energy “Energyguide” Fact Sheets are based upon the fresh air blank-off plate in place and is recommended for maximum energy efﬁciency.

The blank-off plate is available upon request from the factory and is installed in place of the fresh air damper shipped with each unit.

The rear drain can be used with wall thickness of up to 10 inches where a water trap can be installed between the unit and the interior wall. See Figure 10. The trap cannot extend beyond the edge of the unit or it will interfere with the wall mounting bracket. The drain can be routed through the ﬂoor or through the wall. If the drain is routed through the wall, the drain line must be positioned such that it will not interfere with the sleeve ﬂange or the grille. See Figure 11. If the drain

is to be routed through an unconditioned space, it must be protected from freezing.

OPTIONAL REAR DRAIN KITS

Optional Rear Drain Kit, Bard Model QCDS48A, is also available for these products. The optional rear drain kit offers multiple beneﬁts that include the following:

• Allows unit to be rolled away from the sleeve without having to disconnect any hard plumbing connections.

• Allows indoor coil condensate to be easily connected to Rear Drain Box while bypassing the outdoor coil drain pan. This aids in minimizing the potential for biological growth to occur by minimizing the standing water and exposing it to warm temperatures.

For details on energy recovery ventilation see separate section.

SERVICE LIGHT

The unit is equipped with a service light, which signals the user that service is required. The light is located in the upper control panel and is visible only when the hinged service/ﬁlter access door is open.

The Service Unit light indicates that the unit has been shut off by a high or low pressure device. This indicates that the unit needs to be serviced.

CONDENSATE DRAIN

There are two drain connections on the unit. The rear drain is the primary drain, and is located on the right lower rear panel of the unit. The optional side drain is located on the bottom right side of the unit. The side drain is shipped with a plug installed.

The side drain requires a water trap for proper drainage. See Figure 9. The drain can be routed through the ﬂoor or through the wall. If the drain is to

be routed through an unconditioned space, it must be protected from freezing. The drain line must be able

to be removed from the unit if it is necessary to remove the unit from the wall. When the side drain is used, the plug must be removed and installed in the rear drain outlet.

See Figures 12A, 12B, 12C and 12D.

The drain box permanently mounts onto the wall sleeve and is then either piped directly outdoors, or can be piped vertically. The Q-TEC unit is then equipped with ﬁttings on the rear of the unit that slide into the drain box as it is wheeled towards the wall sleeve.

NOTE: On models equipped with a refrigerant subcooler in the lower drain pan may experience a 2-3% decrease in cooling performance and efﬁciency when the indoor condensate is routed around the outdoor coil drain pan/subcooler assembly. Unit rated performance and efﬁciency are with the indoor condensate routed to the outdoor coil pan.

There is also a heated version of the rear drain box available (Model #QCDS48H) for installation in northern climates where freezing may occur. NOTE: Additional circuit needed for drain heater.

Manual 2100-603B Page 11 of 44

FIGURE 9

OPTIONAL SIDE DRAIN (SIDE VIEW)

Q-TEC UNIT

FIGURE 10

STANDARD REAR DRAIN

FIGURE 11

REAR DRAIN (TOP VIEW)

DRAIN LINE

SLEEVE

WATER TRAP

WALL (MAXIMUM 10" FOR REAR DRAIN)

COUPLINGS NOT SHOWN BUT RECOMMENDED FOR EASE OF REMOVABILITY FOR SERVICE.

WALL BRACKET

UNIT

Manual 2100-603B Page 12 of 44

MIS-2469

DRAIN BOX

WALL SLEEVE

OVERFLOW TUBE

CAULK AROUND TUBE

FIGURE 12A

Manual 2100-603B Page 13 of 44

SUPPLIED WITH DRAIN BOX KIT

3/4" PLASTIC PIPE NIPPLE

HORIZONTAL TO FLOOR)

(TIGHTEN THREADS SO TEE IS

THREADS)

(APPLY TEFLON TAPE TO

REAR DRAIN CONNECTION IN Q/Tec PRODUCT

1/2" SLIP X 1/2" SLIP X 3/4" NPT TEE SUPPLIED WITH DRAIN BOX KIT

PLUG INSTALLED IN SIDE Q/Tec DRAIN

MIS-2470

FIGURE 12B

Manual 2100-603B Page 14 of 44

IMPORTANT!

REMOVE KNOCK-OUT FOR INDOOR DRAIN HOSE CONNECTOR

MIS-2471

FIGURE 12C

(If Used)

Manual 2100-603B Page 15 of 44

MIS-2472

DRAIN HOSE FROM INDOOR DRAIN PAN.

MOVE HOSE FROM ATTACHMENT IN LOWER DRAIN PAN AND SLIDE ONTO DRAIN BOX BARB FITTING, SECURING WITH SUPPLIED CLAMP IF OUTDOOR PAN IS BYPASSED. ( WILL REDUCE RISK OF ALGAE GROWTH IN THE OUTDOOR PAN BUT AT A SLIGHT COOLING PERFORMANCE REDUCTION OF 2-3% )

FIGURE 12D

Manual 2100-603B Page 16 of 44

Washer

Sleeve

Stud

MIS-2689

Nut

Lower Control Panel

Condenser

Door (Removed)

Return Grille

BOTTOM

TRIM PIECE

BOTTOM TRIM EXTENSION

FIGURE 13A

UNIT MOUNTING

SIDE TRIM (2 PCS.)

MOUNTING BRACKET

ENLARGED VIEW OF MOUNTING

BRACKET SHOWING SLEEVE TO

CABINET ATTACHMENT

MOUNTING BRACKET

WALL SLEEVE

#8 SCREW PROVIDED

(LIGHT COLOR)

CABINET SIDE PANEL

#10 HEX

HEAD SCREW

PROVIDED

FIGURE 13B

UNIT MOUNTING

Manual 2100-603B Page 17 of 44

INSTALLATION

MOUNTING THE UNIT

When installing a Q-TEC unit near an interior wall on the left side, a minimum of 8 inches is required; 12 inches is preferred.

When installing a Q-TEC unit near an interior wall on the right side, a minimum of 18 inches is required as additional space is required to connect the side drain. If the rear condensate drain kit QCDS48 is used the minimum can be reduced to 8 inches.

This clearance is required to allow for the attachment of the unit to the sleeve and side trim pieces to the wall.

This unit is to be secured to the wall sleeve with mounting brackets provided. The unit itself, the supply duct and the free blow plenum are suitable of “0” clearance to combustible material.

Following are the steps for mounting the Q-TEC. For reference see Figure 13A for external mounting bracket or 13B for internal bolt secured bracket (recommended).

1. Attach mounting brackets to the wall sleeve with screws provided. Either use external mounting bracket (Fig. 13A) or internal bolt bracket (Fig. 13B).

2. Position the unit in front of the sleeve with the condenser section toward the sleeve.

3. Remove the locking screws from the wheels. Refer to Figure 14.

4. Roll the unit into the sleeve. Make sure to check both sides of the unit as it is being rolled to keep it

centered in the sleeve. Also check the alignment to the mounting brackets. This unit must be level from side to side. If adjustments are necessary, shim up under the rollers with sheets of steel or any substance that is not affected by moisture.

5. Make sure the gasket on the rear of the unit is touching the sleeve across the top and down both sides. This is a rain water seal.

6. Secure the mounting brackets to the unit with screws provided, #10 hex head sheet metal screws (Figure 13A) or use nut and washer to secure sleeve (Figure 13B).

7. Bottom trim extensions are provided for use when wall is less than 14 inches but greater than 10.5 inches. Secure to wall with screws (not provided).

8. Attach the bottom trim piece to the unit with the screws provided (dark colored).

9. Position side trim pieces to wall and attach with ﬁeld supplied screws. There are two long pieces and two short pieces supplied. The long pieces are to enclose the gap behind the unit. The short pieces are to ﬁll the gap behind the cabinet extension or the free blow plenum box. They may be cut to suit your ceiling height or overlap the unit side trim. There is sufﬁcient length to trim up to a 10'2" ceiling.

NOTE: If the exterior wall thickness is between 5

inches to 10.5 inches, a side trim extension piece kit, model QSTX42, is available.

REMOVE SCREWS FROM WHEELS BEFORE ROLLING INTO PLACE

Manual 2100-603B Page 18 of 44

FIGURE 14

REMOVING LOCKING SCREWS FROM WHEELS

WIRING – MAIN POWER

Refer to the unit rating plate and/or Table 2 for wire sizing information and maximum fuse or circuit breaker size. Each unit is marked with a “Minimum Circuit Ampacity”. This means that the ﬁeld wiring used must be sized to carry that amount of current. Depending on the installed KW of electric heat, there may be two ﬁeld power circuits required. If this is the case, the unit serial plate will so indicate. All models are suitable only for connection with copper wire. Each unit and/or wiring diagram will be marked “Use Copper Conductors Only”. These instructions MUST BE adhered to. Refer to the National Electrical Code (NEC) for complete current carrying capacity data on the various insulation grades of wiring material. All wiring must conform to NEC and all local codes.

The electrical data lists fuse and wire sizes (75°C copper) for all models, including the most commonly used heater sizes. Also shown are the number of ﬁeld power circuits required for the various models with heaters.

The unit rating plate lists a “Maximum Time Delay Relay Fuse” or circuit breaker that is to be used with the equipment. The correct size must be used for proper circuit protection, and also to assure that there will be no nuisance tripping due to the momentary high starting current of the compressor motor.

The disconnect access door on this unit may be locked to prevent unauthorized access to the disconnect.

See “Start Up” section for information on three phase scroll compressor start-ups.

FIGURE 15

COMPONENT LOCATION

SIDE FIELD WIRE

ELECTRIC HEATERS

UNIT MOUNTED THERMOSTAT LOCATION

DEHUMIDIFICATION CONTROL (OPTIONAL)

ENTRANCE

REMOTE THERMOSTAT TERMINAL BLOCK

INDOOR BLOWER

CIRCUIT BREAKER PANEL & CONTROLS

The ﬁeld wiring connections are located behind the top and hinged panel in the circuit breaker panel. See Figure 15.

WIRING – LOW VOLTAGE WIRING

230/208V, 1 PHASE AND 3 PHASE EQUIPMENT DUAL PRIMARY VOLTAGE TRANSFORMERS

All equipment leaves the factory wired on 240V tap. For 208V operation, reconnect from 240V to 208V tap. The acceptable operating voltage range for the 240 and 208V taps are as noted in Table 3.

TABLE 3

OPERATING VOLTAGE RANGE

TAP RANGE

240V 253 – 216

208V 220 – 187

NOTE: The voltage should be measured at the ﬁeld

power connection point in the unit and while the unit is operating at full load (maximum amperage operating condition).

OPTIONAL CLIMATE CONTROLS SEQUENCE OF OPERATION

The standard Climate Control Option X is a remote thermostat connection terminal block. See Figure 17 or Figure 18 for wiring diagram. Compatible thermostats are listed in Table 4.

The Climate Control Option E is an electronic, programmable thermostat with humidistat. The subbase of the thermostat is factory wired to the front panel of the unit. See Figure 19 for wiring diagram. Compatible for use with Energy Recovery Ventilator. This unit has a refrigerant reheat circuit that is controlled by a 3 way valve.

When the humidity is above the setpoint of the humidistat, the compressor circuit and the 3 way valve are energized and the evaporator airﬂow is reduced. The 3 way valve directs hot discharge gas into a separate desuperheating condenser circuit that reheats the conditioned air before it is delivered to the room. When the humidistat is satisﬁed, the system switches back to normal air conditioning mode.

If the thermostat calls for cooling during dehumidiﬁcation mode, the call for cooling takes precedence over the dehumidiﬁcation and the unit will cool until the thermostat is satisﬁed. Once the call for cooling is satisﬁed, the unit may continue to dehumidify.

LOWER CONTROL PANEL

If the thermostat calls for heat when the unit is in the dehumidiﬁcation mode, the electric heaters will energize and the evaporator airﬂow will return to the heating airﬂow. When the thermostat is satisﬁed, the electric heaters will turn off and the airﬂow will be reduced and the system will continue to dehumidify until humidistat is satisﬁed.

Manual 2100-603B Page 19 of 44

If the unit is running in heat pump mode and the humidistat calls for dehumidiﬁcation, the dehumidiﬁcation mode takes precedence over the heat pump heating mode. The unit will not return to the heating mode until 2nd stage heating is called for.

The Climate Control Option I is an electronic, programmable thermostat with humidistat and a CO controller. The subbase of the thermostat and CO

controller are factory wired to the front panel of the unit. See Figure 20 for wiring diagram. This unit has a refrigerant reheat circuit that is controlled by a 3 way valve.

The CO ID blower when the room CO Default CO

controller will energize the vent option and the

set point is 950 ppm. See Figure 24.

levels rise over set level.

The Climate Control Option J & K are an electronic, programmable thermostat, humidistat and CO

. controller

"J" model only) with BACnet, MS/TP or Ethernet connections.

When the humidity is above the setpoint of the humidistat, the compressor circuit and the 3-way valve are energized and the evaporator airﬂow is reduced. The 3-way valve directs hot discharge gas into a separate desuperheating condenser circuit that reheats the conditioned air before it is delivered to the room. When the humidistat is satisﬁed, the system switches back to normal air conditioning mode.

If the thermostat calls for heat when the unit is in the dehumidiﬁcation mode, the electric heaters will energize

and the evaporator airﬂow will return to the heating airﬂow. When the thermostat is satisﬁed, the electric heaters will turn off and the airﬂow will be reduced and the system will continue to dehumidify until humidistat is satisﬁed.

If the unit is running in heat pump mode and the humidstat calls for dehumidiﬁcation, the dehumidiﬁcation mode takes precedence over the heat pump heating mode. The unit will not return to the heating mode until 2nd stage heating is called for.

Option J (Models only) the CO

sensor in the controller

will energize the vent option and the ID blower when the room CO

levels rise over set level. Default CO2 set point

is 1000 ppm.

NOTE: On option X, ﬁeld provided means to control

ventilation must be used if any of the motorized ventilation options are installed.

LOW VOLTAGE CONNECTIONS

FOR DDC CONTROL

Fan Only Energize G Cooling Mode Energize Y, G Heat Pump Heating Energize Y, G, B 2nd State Heating Energize G, W2, Y, B (if employed) Ventilation Energize G, O1

Dehumidication Energize 4

Emergency Heat Energize B, W2, E, G

LOW VOLTAGE CONNECTIONS

These units use a grounded 24 volt AC low voltage circuit.

The “R” terminal is the hot terminal and the “C” terminal is grounded.

“G” terminal or pin 6 of P2 is the fan input. If the climate control option is abandoned and connections are made directly to P2 pin 6 of P2 must be energized for proper operation.

“Y1” terminal or pin 7 of P2 is the compressor input.

“W1” terminal or pin 8 of P2 is the ﬁst stage heat.

“R” terminal or pin 10 of P2 is 24 VAC hot.

“C” terminal or pin 11 of P2 is 24 VAC grounded.

Terminal “1” or pin 4 of P2 is the dehumidiﬁcation circuit.

Terminal “2” or pin 12 of P2 is the dehumidiﬁcation circuit. A contact must connect terminals 1 and 2.

“W2” terminal or pin 9 of P2 is second stage heat (if equipped). If the unit is equipped with an optional hot water coil plenum box or electric heat these will be energized by this terminal.

“F” terminal of pin 5 of P2 is the ventilation input. This terminal energizes any factory installed ventilation option.

NOTE: For total and proper control using DDC, a total of 7 controlled outputs are required (6 if no ventilation system is installed). For proper system operation under Emergency Heat conditions where the compressor needs to be deactivated, the B-W2-E outputs need to be energized.

Manual 2100-603B Page 20 of 44

Removing the Y (compressor) signal alone turns the compressor off, but does not activate the additional circuitry embedded in the heat pump for proper and complete operation.

CAUTION

Do not plug in or unplug blower motor

connectors while the power is on.

Failure to do so may result in motor failure.

WALL THERMOSTATS & CONTROLS

Thermostat Predominant Features

8403-067

8403-060 (1120-445)

CSB9E-THO

CSB9E-THOC

Carbon Dioxide Sensor with LCD for Sensor Readings

3 stage Cool; 3 stage Heat Programmable/Non-Programmable Electronic HP or Conventional Auto or Manual changeover

3 stage Cool; 3 stage Heat Programmable/Non-Programmable Electronic HP or Conventional Auto or Manual changeover with Humidity Contol BacNet MS/TP or Ethernet Connection

3 stage Cool; 3 stage Heat Programmable/Non-Programmable Electronic HP or Conventional Auto or Manual changeover with CO BacNet MS/TP or Ethernet Connection

GENERAL

This unit is equipped with a variable speed ECM motor. The motor is designed to maintain rated airﬂow up to the maximum static allowed. It is important that the

blower motor plugs are not plugged in or unplugged while the power is on. Failure to remove power prior to unplugging or plugging in the motor could result in motor failure.

TABLE 4

& Humidity Contol

FIGURE 16

MIS-1285

Manual 2100-603B Page 21 of 44

12345

FACTORY INSTALLED JUMPER

"J" CS9BE-THO

"K" CS9BE-THOC

Plug #2

FIGURE 17

REMOTE THERMOSTAT WIRING DIAGRAM

“X” THERMOSTAT OPTION

Black

Red/Yellow

Relay Logic Board

Purple/White

Orange

Brown/White

Freeze

Protect Tstat

Blue

Brown

Yellow

TWV

Bard Part #8408-038

Red/White

Pink

RAT

Return Air

Thermostat

Red/WhiteRed/White

Black/White

4102-063 B

Plug #4

Black/White

Red/White

123

Red/White

Black/White

W1/E

Red

Red/Yellow

W1/E

Purple/White

D/YO

Brown/White

Orange

Blue

Yellow

Brown

101112

Blue

Brown

Red/White

Black/White

RCL

Term. Block

Low Voltage

8403-060

Thermostat

O/B

Manual 2100-603B Page 22 of 44

Dehumidification Wiring Diagram

art #8403-067

FIGURE 18

REMOTE THERMOSTAT WIRING DIAGRAM

“X” THERMOSTAT OPTION & DEMAND VENTILATION

12345

Plug #2

Black

Red/Yellow

Brown/White

Purple/White

Relay Logic Board

Orange

Freeze

Protect Tstat

Blue

Brown

Yellow

TWV

Bard Part #8408-038

Red/White

Pink

RAT

Thermostat

Return Air

Red/White

Black/White

MIS-2690 D

Black/White

And Demand Ventilation

With "X" Thermostat Option

Red/White

Optional

24 VAC

CO2 Controller

Bard P

CO2-OUT

465

TEMP-OUT

Black/White

Red/White

12345

Plug #4

Red/White

Black/White

Red

Purple/White

Brown/White

Blue

Yellow

Orange

Yellow

Purple/White

D/YO

Orange

Brown/White

Red/Yellow

W1/E

Brown

Blue

O/B

Brown

Red/White

Black/White

Term. Block

Low Voltage

8403-060

Thermostat

FACTORY INSTALLED JUMPER

Manual 2100-603B Page 23 of 44

4102-064

Thermostat

RAT

TWV

Purple/White

Relay Logic Board

Thermostat

Plug #2

Pink

Red/White

Brown

Blue

Yellow

Orange

Brown/White

Purple/White

Black/White

Brown

Blue

Yellow

Orange

Brown/White

Purple/White

Red

Red/White

Red/WhiteRed/White

Black/White

Black

Red/Yellow

Plug #4

Return Air

Protect Tstat

Bard Part #8408-038

W1/E

Red/Yellow

Brown/White

Orange

Yellow

Blue

Brown

Red/White

Black/White

Freeze

8403-060

D/YO

FIGURE 19

“E” THERMOSTAT OPTION

UNIT MOUNTED THERMOSTAT WIRING DIAGRAM

Manual 2100-603B Page 24 of 44

FIGURE 20

With "I" Thermostat Option

Wiring Diagram

UNIT MOUNTED THERMOSTAT WIRING DIAGRAM

“I” THERMOSTAT OPTION

CO Controller

Bard Part #8403-067

24 VAC

CO2-OUT

TEMP-OUT

Red/White

8403-060

Thermostat

W1/E

D/YO

Red/Yellow

Purple/White

Orange

Yellow

Blue

Brown

Red/White

Black/White

Brown/White

Red/White

Black/White

Plug #4

4102-066 C

Manual 2100-603B Page 25 of 44

Black/White

RAT

TWV

4102-079

Thermostat

Plug #2

Pink

Red/White

Brown

Blue

Yellow

Orange

Brown/White

Purple/White

Black/White

Brown

Blue

Yellow

Orange

Brown/White

Purple/White

Red

Red/White

Red/WhiteRed/White

Black/White

Black

Red/Yellow

Plug #4

Relay Logic Board

Purple/White

Bard Part #8408-038

W1/E

Red/Yellow

Brown/White

Orange

Yellow

Blue

Brown

Red/White

Return Air

Protect Tstat

K" CS9BE-THOC

Freeze

"J" CS9BE-THO"

FIGURE 21

“J” OR “K” THERMOSTAT OPTION

UNIT MOUNTED THERMOSTAT WIRING DIAGRAM

Manual 2100-603B Page 26 of 44

START UP

THESE UNITS REQUIRE R-410A REFRIGERANT AND POLYOL ESTER OIL.

GENERAL

1. Use separate service equipment to avoid cross contamination of oil and refrigerants.

2. Use recovery equipment rated for R-410A refrigerant.

3. Use manifold gauges rated for R-410A (800 psi/250 psi low).

4. R-410A is a binary blend of HFC-32 and HFC-

125.

5. R-410A is nearly azeotropic - similar to R-22 and R-12. Although nearly azeotropic, charge with liquid refrigerant.

6. R-410A operates at 40-70% higher pressure than R-22, and systems designed for R-22 cannot withstand this higher pressure.

7. R-410A has an ozone depletion potential of zero, but must be reclaimed due to its global warming potential.

8. R-410A compressors use Polyol Ester oil.

9. Polyol Ester oil is hygroscopic; it will rapidly absorb moisture and strongly hold this moisture in the oil.

10. A liquid line dryer must be used - even a deep vacuum will not separate moisture from the oil.

11. Limit atmospheric exposure to 15 minutes.

12. If compressor removal is necessary, always plug compressor immediately after removal. Purge with small amount of nitrogen when inserting plugs.

TOPPING OFF SYSTEM CHARGE

If a leak has occurred in the system, Bard Manufacturing recommends reclaiming, evacuating (see criteria above), and charging to the nameplate charge. If done correctly, topping off the system charge can be done without problems.

With R-410A, there are no signiﬁcant changes in the refrigerant composition during multiple leaks and recharges. R-410A refrigerant is close to being an azeotropic blend (it behaves like a pure compound or single component refrigerant). The remaining refrigerant charge, in the system, may be used after leaks have occurred and then “top-off” the charge by

utilizing the pressure charts on the inner control panel cover as a guideline.

REMEMBER: When adding R-410A refrigerant, it must come out of the charging cylinder/tank as a liquid to avoid any fractionation, and to insure optimal system performance. Refer to instructions for the cylinder that is being utilized for proper method of liquid extraction.

WARNING

Failure to conform to these practices could lead to damage, injury or death.

SAFETY PRACTICES

1. Never mix R-410A with other refrigerants.

2. Use gloves and safety glasses. Polyol Ester oils can be irritating to the skin, and liquid refrigerant will freeze the skin.

3. Never use air and R-410A to leak check; the mixture may become ﬂammable.

4. Do not inhale R-410A – the vapor attacks the nervous system, creating dizziness, loss of coordination and slurred speech. Cardiac irregularities, unconsciousness and ultimate death can result from breathing this concentration.

5. Do not burn R-410A. This decomposition produces hazardous vapors. Evacuate the area if exposed.

6. Use only cylinders rated DOT4BA/4BW 400.

7. Never ﬁll cylinders over 80% of total capacity.

8. Store cylinders in a cool area, out of direct sunlight.

9. Never heat cylinders above 125°F.

10. Never trap liquid R-410A in manifold sets, gauge lines or cylinders. R-410A expands signiﬁcantly at warmer temperatures. Once a cylinder or line is full of liquid, any further rise in temperature will cause it to burst.

Manual 2100-603B Page 27 of 44

DESCRIPTION OF STANDARD EQUIPMENT

Solid State Electronic Heat Pump Control

Provides efﬁcient 30-minute defrost cycle. A thermistor sensor and speed up terminal for service along with a 10- minute defrost override are standard on the electronic heat pump control.

High Pressure Switch

Provides refrigerant circuit high pressure protection. Includes lockout circuit that is resettable from room thermostat.

Compressor Control Module

Provides short cycle protection for the compressor which extends compressor life, as well as high and low pressure switch monitoring and alarm functions.

Service Lights

One service light indicates when service is required.

• Check System – detects high or low pressure switch operation for compressor protection.

OPTIONAL CFM (Q36H2D, Q42H2D, Q48H2D AND Q60H2D ONLY)

These units are shipped from the factory set to operate at the optional CFM level shown in Table 9. This provides lower operating sound levels for non-ducted, free discharge applications. This CFM level will reduce the system capacity performance by approximately 2% at the same energy efﬁciency.

Rated CFM is required for ducted applications for maximum performance rating. To obtain full CFM on these models, connect jumper wire as follows:

1. Disconnect all power to the unit. Failure to do so may result in damage to the motor.

2. Open return air service panel

3. Open inner control panel cover

4. Locate low voltage terminal strip. There is a pink jumper wire with both ends attached to terminal marked “G2”. Move one end of this jumper to terminal “Y”.

5. Reverse steps to reassemble.

IMPORTANT INSTALLER NOTE

For improved start-up performance, wash the indoor coil with a dishwasher detergent.

PHASE MONITOR

All units with three phase scroll compressors are equipped with a 3 phase line monitor to prevent compressor damage due to phase reversal.

The phase monitor in this unit is equipped with two LEDs. If the Y signal is present at the phase monitor and phases are correct the green LED will light and the compressor contactor is allowed to energize.

If phases are reversed, the red fault LED will be lit and compressor operation is inhibited.

If a fault condition occurs, reverse two of the supply leads to the unit. Do not reverse any of the unit factory wires as damage may occur.

THREE PHASE SCROLL COMPRESSOR START UP INFORMATION

Scroll compressors, like several other types of compressors, will only compress in one rotational direction. Direction of rotation is not an issue with single phase compressors since they will always start and run in the proper direction.

However, three phase compressors will rotate in either direction depending upon phasing of the power. Since there is a 50-50 chance of connecting power in such a way as to cause rotation in the reverse direction, veriﬁcation of proper rotation must be made. Veriﬁcation of proper rotation direction is made by observing that suction pressure drops and discharge pressure rises when the compressor is energized. Reverse rotation also results in an elevated sound level over that with correct rotation, as well as, substantially reduced current draw compared to tabulated values.

Veriﬁcation of proper rotation must be made at the time the equipment is put into service. If improper rotation is corrected at this time there will be no negative impact on the durability of the compressor. However, reverse operation for even one hour may have a negative impact on the bearing due to oil pump out.

All three phase scroll compressors used in the Q-TEC series are wired identically internally. As a result, once the correct phasing is determined for a speciﬁc system or installation, connecting properly phased power leads to the same Fusite terminal should maintain proper rotation direction. The direction of rotation of the motor may be changed by reversing any two line connections to the unit.

Manual 2100-603B Page 28 of 44

SERVICE HINTS

1. Caution user to maintain clean air ﬁlters at all times. Also, not to needlessly close off supply air registers. This may reduce airﬂow through the system, which shortens equipment service life as well as increasing operating costs and noise levels.

2. Switching to heating cycle at 75°F or higher outside temperature may cause a nuisance trip of the remote reset high pressure switch. Turn thermostat off, then on to reset the high pressure switch.

3. The heat pump wall thermostats perform multiple functions. Be sure that all function switches are correctly set for the desired operating mode before trying to diagnose any reported service problems.

4. Check all power fuses or circuit breakers to be sure they are the correct rating.

5. Periodic cleaning of the outdoor coil to permit full and unrestricted airﬂow circulation is essential.

6. Some service requires the need to remove the unit from the wall including replacement of the indoor coil and/or the outdoor coil. Also servicing the outdoor fan motor or fan blade will require removing the unit from the wall if the unit is installed at a height that is not easily accessible from the outside of the building.

In order to remove the unit from the wall the

following procedure must be used:

a. Turn off power to the unit at the remote

location. Some units may have more than one power supply.

b. Disconnect ﬁeld wiring at unit terminal block

and remove from unit.

c. Disconnect condensate drain.

d. Remove the lower skirting around the unit.

7. Annual maintenance is required to ensure that all of the systems are functioning properly.

a. Check to make sure that the drains are not

obstructed in any way.

b. Remove any debris in the condenser section of

the unit.

c. Inspect and clean mist eliminator as described

below.

d. Inspect and wash outdoor coil as necessary.

MIST ELIMINATOR SERVICE

A mist eliminator is supplied with the wall sleeve. The mist eliminator is constructed of an aluminum frame and mesh. The mist eliminator is located in the top section of the wall sleeve and can be removed from the inside of the building without removing the unit from the wall. This requires that the ventilation package must be removed.

It is recommended that the mist eliminator be inspected annually and serviced as required. The mist eliminator can be inspected from the outside of the building by looking through the outdoor grille. The mist eliminator can be serviced from the outside by using a vacuum cleaner. The outdoor grille must be removed. Use the vacuum to remove dirt and debris from the surface of the mist eliminator. If additional cleaning is required, the mist eliminator will have to be removed from the sleeve.

The ventilation package will have to be removed to gain access to the mist eliminator. If the blank off plate option is used, it is not necessary to service the mist eliminator. The steps necessary to remove each of the vent options are listed below.

The mist eliminator can be cleaned by washing with soap and water. The excess water should be shaken off the mist eliminator before it is reinstalled.

e. Remove wall mounting brackets from wall on

each side of the unit.

f. If unit is attached to duct work, remove upper

cabinet extension by removing the top center screw only from the cabinet side panel.

g. Remove screws that attach the duct work to

the unit ﬂanges.

This unit is equipped with four rollers mounted

to the base. For ease of pulling unit out from the wall, you may want to remove the bottom service door which requires removal of the return air panel, and grip the front ﬂange of the base pan then pull straight out.

Manual 2100-603B Page 29 of 44

VENT OPTIONS

BAROMETRIC FRESH AIR DAMPER (Standard)

Before starting, make sure the power has been turned off. The return air grille panel must be removed. The fresh air damper assembly can be seen on the back of the unit. See Figure 22.

1. The fresh air damper is attached to the back of the unit with one screw on either side of the assembly. Both of the screws must be removed.

2. Once the mounting screws are removed, tilt the assembly down and lift it out.

The mist eliminator can be seen through the opening. The mist eliminator must be raised up and the bottom can be pulled toward the front of the unit.

COMMERCIAL ROOM VENTILATOR (Option)

Before starting, make sure the power has been turned off. The return air grille panel must be removed. The commercial room ventilator (CRV) can be seen after the panel has been removed. The CRV must be removed to gain access to the mist eliminator.

1. The two mounting screws in the front of the CRV must be removed.

2. The power connectors for the CRV (located on the right side of the unit) must be disconnected. Squeeze the tabs on the sides of the connector and pull straight out. Unplug both of the connectors.

3. Slide the CRV straight out of the unit.

The mist eliminator can be seen through the opening in the back of the unit. The mist eliminator must be raised up and the bottom can be pulled toward the front of the unit and removed.

Q-TEC ENERGY RECOVERY VENTILATOR (Option)

Before starting, make sure that the power has been turned off. The return air grille panel must be removed. The energy recovery ventilator (QERV) can be seen after the panel has been removed. To gain access to the mist eliminator, the QERV must be removed. See Figure 23.

1. The front ﬁll plate of the QERV must be removed. There is one screw on either side of the plate. Remove these screws and remove the plate.

2. On either side of the QERV there are mounting screws that hold the QERV in place. Remove both of these screws.

3. Underneath the heat recovery cassette there is a power connector for the lower blower assembly. To disconnect this plug, the tabs on both sides of the plug must be squeezed to release the plug. While squeezing the tabs, pull the plug out of the socket.

4. The QERV is plugged into the unit in the right side of the unit. Both of these plugs must be disconnected to remove the QERV. Squeeze the tabs on the sides of the connector and pull straight out.

5. Slide the QERV assembly straight out of the unit, being careful not to let the cassette slide out of the QERV.

The mist eliminator can be seen through the opening in the back of the unit. The mist eliminator must be raised up and the bottom can be pulled toward the front of the unit and removed.

Manual 2100-603B Page 30 of 44

FIGURE 22

FRESH AIR DAMPER REMOVAL

MOUNTING SCREW

Manual 2100-603B Page 31 of 44

FIGURE 23

QERV REMOVAL

MOUNTING SCREWS

POWER

CONNECTORS

LOWER BLOWER

ASSEMBLY POWER

CONNECTOR

FRONT FILL

Manual 2100-603B Page 32 of 44

SEQUENCE OF OPERATION

PRESS UP AND DOWN ARROWS TO ENTER CONFIGURATION MODE USE ARROWS TO SELECT SETTING. PUSH MIDDLE BUTTON TO CHANGE. CONTROLLER WILL SHOW SET.

NOTE: MENU JUMPER MUST BE SET TO "ON" TO CHANGE ANY SETTINGS WITH THE FRONT BUTTONS. TO LOCK THE CO2 CONTROLLER MOVE JUMPER TO "OFF" AFTER IT HAS BEEN CONFIGURED

Settings Recommended Default

RON 1000 1000 ROF 950 950 DSP C CT

UNI US US COL Not Used COH Not Used TOL Not Used TOH Not Used

BAR

See Instrution with Controller

For High Altitude Installations

CAL Used for Field Calibration

MIS-3326

Cooling – Circuit R-Y makes the thermostat pull in the compressor contactor starting the compressor and outdoor motor. The G (indoor motor) circuit is automatically completed on any call for cooling operation, or can be energized by manual fan switch on subbase for constant air circulation.

Heating – A 24V solenoid coil on the reversing valve controls heating cycle operation. Two thermostat options, one allowing “Auto” change over from cycle to cycle and the other constantly energizing solenoid coil during heating season and thus eliminating pressure equalization noise except during defrost, are to be used on “Auto” option, a circuit is completed for R-W1 and R-Y on each heating “on” cycle, energizing reversing valve solenoid and pulling in compressor contactor starting compressor and outdoor motor. R-G also makes starting indoor blower motor. Heat pump heating cycle now in operation.

The second option has no “Auto” change over position, but instead energizes the reversing valve solenoid constantly whenever the system switch on subbase is placed in “Heat” position, the “B” terminal being constantly energized from R. A thermostat demand for heat completes R-Y circuit, pulling in compressor contactor starting compressor and outdoor motor. R-G also make starting indoor blower motor.

Reheat Circuit – There is a small capillary tube inserted between the reheat coil return line and suction line that will prevent liquid from accumulating in the reheat coil when it is inactive. This drain does not affect the normal operation of the system.

There is a check valve located in the reheat coil return line. It has a soft spring to hold the ball on the seat. This will make the method of checking the ball freedom with a magnet difﬁcult. Refer to Figures 25 and 26 for the location of the check valve and drain back capillary.

When the system is operating in the dehumidiﬁcation mode, the suction pressure will be reduced by 4 to 8 psig and the discharge pressure will be reduced by 19 to 22 psig.

Return Air Thermostat – In dehumidiﬁcation mode if the return air temperature is lower than 65°, the return air thermostat closes and brings on stage one electric heat to maintain 65°.

High/Low Pressure Control provides protection for the compressor. In the event system pressures go above 600 PSI or below 15 PSI in either cooling or heating mode the compressor will be stopped. This will activate the red light located in the control panel. The lockout circuit will hold compressor off line. When the system problem is corrected, the unit operation can be restored by turning of the main power supply off and then back on, or reset the room thermostat. The low pressure control has a bypass to eliminate nuisance lockout on cold start up.

The bypass timer should be set to 120 seconds. This is to assure there is no nuisance tripping of the lowpressure control during startup in heating mode under cold weather conditions.

FIGURE 24 – CO2 CONTROLLER (FACTORY SET TO 950 PPM)

Manual 2100-603B Page 33 of 44

REFRIGERANT TUBE SCHEMATIC FOR REHEAT COIL

Figure 25 shows the refrigerant gas ﬂow through the reheat coil during the dehumidiﬁcation mode.

When the unit is in standard cooling (Figure 26) or heating mode, the reheat coil is inactive.

FIGURE 25

Q-TEC DEHUMIDIFICATION MODE CIRCUIT DIAGRAM

Manual 2100-603B Page 34 of 44

FIGURE 26

Q-TEC COOLING MODE CIRCUIT DIAGRAM

PRESSURE SERVICE PORTS

High and low pressure service ports are installed on all units so that the system operating pressures can be observed. Pressure curves can be found later in the manual covering all models on both cooling and heating cycles. It is imperative to match the correct pressure curve to the unit by model number. Upper and lower service doors must be attached to obtain proper reading.

This unit employs high-ﬂow Coremax valves instead of the typical Shrader type valves.

WARNING! Do NOT use a Schrader valve core removal tool with these valves. Use of such a tool could result in eye injuries or refrigerant burns!

To change a Coremax valve without ﬁrst removing the refrigerant, a special tool is required which can be obtained at www.fastestinc.com/en/SCCA07H. See the replacement parts manual for replacement core part numbers.

Manual 2100-603B Page 35 of 44

DEFROST CYCLE

The defrost cycle is controlled by temperature and time on the solid state heat pump control.

When the outdoor temperature is in the lower 40°F temperature range or colder, the outdoor coil temperature is 32°F or below. This coil temperature is sensed by the coil temperature sensor mounted near the bottom of the outdoor coil. Once coil temperature reaches 30°F or below, the coil temperature sensor sends a signal to the control logic of the heat pump control and the defrost timer will start accumulating run time.

After 30, 60 or 90 minutes of heat pump operation at 30°F or below, the heat pump control will place the system in the defrost mode.

During the defrost mode, the refrigerant cycle switches back to the cooling cycle, the outdoor motor stops, electric heaters are energized, and hot gas passing through the outdoor coil melts any accumulated frost. When the temperature rises to approximately 57°F, the coil temperature sensor will send a signal to the heat pump control which will return the system to heating operations automatically.

If some abnormal or temporary condition such as a high wind causes the heat pump to have a prolonged defrost cycle, the heat pump control will restore the system to heating operation automatically after 8 minutes.

The heat pump defrost control board has an option of 30, 60 or 90-minute setting. By default, this unit is shipped from the factory with the defrost time on the 30 minute pin. If circumstances require a change to another time, remove the wire from the 30-minute terminal and reconnect to the desired terminal. Refer to Figure 27.

There is a cycle speed up jumper on the control. This can be used for testing purposes to reduce the time between defrost cycle operation without waiting for time to elapse.

Use a small screwdriver or other metallic object, or another ¼ inch QC, to short between the SPEEDUP terminals to accelerate the HPC timer and initiate defrost.

Be careful not to touch any other terminals with the instrument used to short the SPEEDUP terminals. It may take up to 10 seconds with the SPEEDUP terminals shorted for the speedup to be completed and the defrost cycle to start.

There is an initiate defrost jumper (sen jump) on the control that can be used at any outdoor ambient during the heating cycle to simulate a 0° coil temperature.

This can be used to check defrost operation of the unit without waiting for the outdoor ambient to fall into the defrost region.

By placing a jumper across the SEN JMP terminals (a ¼ inch QC terminal works best) the defrost sensor mounted on the outdoor coil is shunted out & will activate the timing circuit. This permits the defrost cycle to be checked out in warmer weather conditions without the outdoor temperature having to fall into the defrost region.

In order to terminate the defrost test the SEN JMP jumper must be removed. If left in place too long, the compressor could stop due to the high pressure control opening because of high pressure condition created by operating in the cooling mode with outdoor fan off. Pressure will rise fairly fast as there is likely no actual frost on the outdoor coil in this artiﬁcial test condition.

There is also a 5-minute compressor time delay function built into the HPC. This is to protect the compressor from short cycling conditions. The board’s LED will have a fast blink rate when in the compressor time delay. In some instances, it is helpful to the service technician to override or speed up this timing period, and shorting out the SPEEDUP terminals for a few seconds can do this.

Low Pressure Switch Bypass Operation – The control has a selectable (SW1) low pressure switch bypass set up to ignore the low pressure switch input during the ﬁrst (30, 60, 120 or 180 seconds) of “Y” operation.

After this period expires, the control will then monitor the low pressure switch input normally to make sure that the switch is closed during “Y” operation.

High Pressure Switch Operation – The control has a built-in lockout system that allows the unit to have the high pressure switch trip up to two times in one hour and only encounter a “soft” lockout. A “soft” lockout shuts the compressor off and waits for the pressure switch to reset, which at that point then allows the compressor to be restarted as long as the 5-minute short cycle timer has run out. If the high pressure switch trips a third time within one hour, the unit is in “hard” lockout indicating something is certainly wrong and it will not restart itself.

As soon as the defrost cycle kicks in, remove the shorting instrument from the SPEEDUP terminals.

Otherwise the timing will remain accelerated and run through the 1-minute minimum defrost length sequence in a matter of seconds and will automatically terminate the defrost sequence.

Manual 2100-603B Page 36 of 44

120*

SW1SW

2 TIME (SEC)

OFF OFF

ON ON

OFF

30 60

180

LOW PRESSURE BYPASS TIMER SWITCH (FACTORY SETTING 120 SECONDS)

ACCUMULATED RUN TIME SELECTOR (FACTORY SETTING 30 MIN.)

MIS-2684 A

OFF

FIGURE 27

DEFROST CONTROL BOARD

Manual 2100-603B Page 37 of 44

TROUBLESHOOTING

SOLID STATE HEAT PUMP CONTROL TROUBLESHOOTING PROCEDURE

3. Turn thermostat blower to “auto” position. Indoor blower should stop. NOTE: Many models have a

1-minute blower time delay on “off” command;

NOTE: A thorough understanding of the defrost

wait for this to time-out.

cycle sequence is essential. Review that section found earlier in this manual prior to troubleshooting the control.

4. Set system switch to “heat” or “cool”. Adjust thermostat to call for heat or cool. The indoor blower, compressor and outdoor fan should start.

1. Turn on AC power supply to unit.

NOTE: If there was no power to 24 volt transformer,

2. Turn thermostat blower switch to “fan on”; the indoor blower should start. (If it doesn’t, troubleshoot indoor unit and correct problem.)

the compressor and outdoor fan motor will not start for 5 minutes. This is because of the compressor short cycle protection.

TABLE 5

TROUBLESHOOTING

Sympton Description, Check & Possible Causes What & How to Check/Repair

Compressor will not start (heating or cooling)

Fan outdoor motor does not run (cooling or heating except during defrost)

Reversing valve does not energize (heating only)

Unit will not go into defrost (heating only)

Unit will not come out of defrost (heating only)

1. Check for LED illumination.

Is there an LED illuminated on the board (ﬂashing)?

2. Check for error codes.

Is the LED ﬂashing a Code?

3. Check for power at board.

Is there 24 volts AC between R and C?

4. Check codes.

What code is blinking?

5. Compressor delay active.

Wait for 5 minute delay or jump board's "speed up pins".

6. Low pressure fault. Check wiring circuit and unit pressures.

7. High pressure fault. Check wiring circuit and unit pressures.

8. Check for Compressor input signal.

Is there 24 volts AC between Y and C?

9. No power to board. The unit either does not have unit voltage, the transformer is bad or the unit wiring is incorrect.

10. Check for Compressor output signal.

Is there 24 volts AC between CC & C?

11. No "Y" compressor input signal.

12. No "CC" compressor output signal. Check compressor contactor for proper operation and ﬁnally check compressor.

13. Faulty board. Replace defrost board.

Heat pump control defective

Motor defective Check for open or shorted motor winding. Replace motor.

Motor capacitor defective Check capacitor rating. Check for open or shorted capacitor. Replace capacitor.

Heat pump control defective

Reversing valve solenoid coil defective

Temperature sensor or heat pump control defective

Blink Function Blink Function

Slow Normal function (1.0 sec on/1.0 sec off) 2 High pressure switch failure/“Soft” Lockout

Fast Compressor Delay timer active (0.1 sec on/0.1 sec off) 3 Defrost mode active

1 Low pressure switch failure 4 High pressure switch failure/“Hard” Lockout

Yes = go to Step #2; No = go to Step #3

Yes = go to Step #4; No = go to Step #8

Yes = go to Step #13; No = go to Step #9

Code "1", go to Step #6; Code "2", go to Step#7; Fast Blink, go to Step #5

Check for proper operation; if still needed, go back to Step #1.

Yes = go to Step #10; No = go to Step #11

Yes = go to Step #12; No = go to Step #13

Check thermostat wiring, incorrect phase of unit (see section on Phase Monitor), and ﬁnally unit wiring.

Check across fan relay on heat pump control. (Com-NC) Replace heat pump control.

Check for 24V between RV-C and B-C.

1. Check control circuit wiring.

2. Replace heat pump control.

Check for open or shorted coil. Replace solenoid coil.

Disconnect temperature sensor from board and jumper across "SPEEDUP" terminals and "SEN JMP" terminals. This should cause the unit to go through a defrost cycle within one minute.

1. If unit goes through defrost cycle, replace temperature sensor.

2. If unit does not go through defrost cycle, replace heat pump control.

Jumper across "SPEEDUP" terminal. This should cause the unit to come out of defrost within one minute.

1. If unit comes out of defrost cycle, replace temperature sensor.

2. If unit does not come out of defrost cycle, replace heat pump control.

LED Blink Codes

Manual 2100-603B Page 38 of 44

CHECKING TEMPERATURE SENSOR

1. Disconnect temperature sensor from board and

from outdoor coil.

2. Use an ohmmeter to measure the resistance of the

sensor. Also use ohmmeter to check for short or open.

3. Check resistance reading to chart of resistance use

sensor ambient temperature. (Tolerance of part is ±10%.)

TABLE 6

TEMPERATURE (F) VS RESISTANCE (R) OF TEMPERATURE SENSOR

F R F R F R F R

-25.0 196871 13.0 56985 53.0 19374 89.0 7507

-24.0 190099 14.0 55284 52.0 18867 90.0 7334

-23.0 183585 15.0 53640 53.0 18375 91.0 7165

-22.0 177318 16.0 52051 54.0 17989 92.0 7000

-21.0 171289 17.0 50514 55.0 17434 93.0 6840

-20.0 165487 18.0 49028 56.0 16984 94.0 6683

-19.0 159904 19.0 47590 57.0 16547 95.0 6531

-18.0 154529 20.0 46200 58.0 16122 96.0 6383

-17.0 149355 21.0 44855 59.0 15710 97.0 6239

-16.0 144374 22.0 43554 60.0 15310 98.0 6098

-15.0 139576 23.0 42295 61.0 14921 99.0 5961

-14.0 134956 24.0 41077 62.0 14544 100.0 5827

-13.0 130506 25.0 39898 63.0 14177 101.0 5697

-12.0 126219 26.0 38757 64.0 13820 102.0 5570

-11.0 122089 27.0 37652 65.0 13474 103.0 5446

-10.0 118108 28.0 36583 66.0 13137 104.0 5326

-9.0 114272 29.0 35548 67.0 12810 105.0 5208

-8.0 110575 30.0 34545 68.0 12492 106.0 5094

-7.0 107010 31.0 33574 69.0 12183 107.0 4982

-6.0 103574 32.0 32634 70.0 11883 108.0 4873

-5.0 100260 33.0 31723 71.0 11591 109.0 4767

-4.0 97064 34.0 30840 72.0 11307 110.0 4663

-3.0 93981 35.0 29986 73.0 11031 111.0 4562

-2.0 91008 36.0 29157 74.0 10762 112.0 4464

-1.0 88139 37.0 28355 75.0 10501 113.0 4367

0.0 85371 38.0 27577 76.0 10247 114.0 4274

1.0 82699 39.0 26823 77.0 10000 115.0 4182

2.0 80121 40.0 26092 78.0 9760 116.0 4093

3.0 77632 41.0 25383 79.0 9526 117.0 4006

4.0 75230 42.0 24696 80.0 9299 118.0 3921

5.0 72910 43.0 24030 81.0 9077 119.0 3838

6.0 70670 44.0 23384 82.0 8862 120.0 3757

7.0 68507 45.0 22758 83.0 8653 121.0 3678

8.0 66418 46.0 22150 84.0 8449 122.0 3601

9.0 64399 47.0 21561 85.0 8250 123.0 3526

10.0 62449 48.0 20989 86.0 8057 124.0 3452

11.0 60565 49.0 20435 87.0 7869

12.0 58745 50.0 19896 88.0 7686

4. If sensor resistance reads very low, then sensor is shorted and will not allow proper operation of the heat pump control.

5. If sensor is out of tolerance, shorted, open, or reads very low ohms, it should be replaced.

Manual 2100-603B Page 39 of 44

TROUBLESHOOTING ECM™ MOTORS

CAUTION:

Disconnect power from unit before removing or replacing connectors, or servicing motor. To avoid electric shock from the motor’s capacitors, disconnect power and wait at least 5 minutes before opening motor.

Symptom Cause/Procedure

Motor rocks slightly • This is normal start-up for ECM when starting

Motor won’t start • Check blower turns by hand

• No movement

• Check low voltage (24 Vac R to C) at motor

• Check low voltage connections (G, Y, W, R, C) at motor

• Check for unseated pins in connectors on motor harness

• Test with a temporary jumper between R - G

• Check motor for tight shaft

• Perform motor/control replacement check

• Perform Moisture Check

• Motor rocks, • Check for loose or compliant motor mount but won’t start

• Perform motor/control replacement check

Motor oscillates up • It is normal for motor to oscillate with no & down while being load on shaft tested off of blower

Motor starts, but runs erratically

• Varies up and down • Check line voltage for variation or “sag” or intermittent • Check low voltage connections (G, Y, W, R, C) at motor, unseated pins in motor harness connectors

• Check “Bk” for erratic CFM command (in variable-speed applications)

• Check out system controls, Thermostat

• Perform Moisture Check

• “Hunts” or “puffs” at • Does removing panel or ﬁlter reduce high CFM (speed) “pufﬁng”?

- Reduce restriction

- Reduce max airﬂow

• Stays at low CFM • Check low voltage (Thermostat) wires and despite system call connections for cool or heat CFM • Verify fan is not in delay mode; wait until delay complete

• “R” missing/not connected at motor

• Perform motor/control replacement check

• Stays at high CFM • “R” missing/not connected at motor

• Is fan in delay mode? - wait until delay time complete

• Perform motor/control replacement check

• Blower won’t shut off • Check for Triac switched thermostat or solid state relay

Excessive noise • Determine if it’s air noise, cabinet, duct or motor noise; interview customer, if necessary

• Air noise • High static creating high blower speed?

- Is airﬂow set properly?

- Does removing ﬁlter cause blower to slow down? Check ﬁlter

- Use low-pressure drop ﬁlter

- Check/correct duct restrictions

• Check power at motor

• Make sure blower wheel is tight on shaft

Current leakage from controls into G, Y or W?

Symptom Cause/Procedure

• Noisy blower or cabinet • Check for loose blower housing, panels, etc.

• High static creating high blower speed?

- Check for air whistling through seams in ducts, cabinets or panels

- Check for cabinet/duct deformation

• “Hunts” or “puffs” at • Does removing panel or ﬁlter reduce high CFM (speed)

- Reduce restriction

- Reduce max. airﬂow

Evidence of Moisture

• Motor failure or • Replace motor and malfunction has occurred and moisture is present

• Evidence of moisture • Perform Moisture Check present inside air mover

“pufﬁng”?

Perform Moisture Check

Do Don’t

• Check out motor, controls, • Automatically assume the motor is bad. wiring and connections thoroughly before replacing motor

• Orient connectors down so • Locate connectors above 7 and 4 o’clock water can’t get in positions

- Install “drip loops”

• Use authorized motor and • Replace one motor or control model # with model #’s for replacement another (unless an authorized replacement)

• Keep static pressure to a • Use high pressure drop ﬁlters; some have minimum: H20 drop!

- Recommend high • Use restricted returns efﬁciency, low static ﬁlters

- Recommend keeping ﬁlters clean.

- Design ductwork for min. static, max. comfort

- Look for and recommend ductwork improvement, where necessary

• Size the equipment wisely • Oversize system, then compensate with low airﬂow

• Check orientation before • Plug in power connector backwards inserting motor connectors • Force plugs

Moisture Check

• Connectors are oriented “down” (or as recommended by equipment manufacturer)

• Arrange harness with “drip loop” under motor

• Is condensate drain plugged?

• Check for low airﬂow (too much latent capacity)

• Check for undercharged condition

• Check and plug leaks in return ducts, cabinet

Comfort Check

• Check proper airﬂow settings

• Low static pressure for lowest noise

• Set low continuous-fan CFM

• Use humidistat and 2-speed cooling units

• Use zoning controls designed for ECM that regulate CFM

• Thermostat in bad location?

½"

Manual 2100-603B Page 40 of 44

™

MOTORS CONT’D.

8b. IF REPLACING AN ECM 2.3 CONTROL WITH AN ECM 2.3 CONTROL, the plastic tab and shorter through-bolts are not needed. The control can be oriented in two positions 180° apart. MAKE SURE THE ORIENTATION YOU SELECT FOR REPLACING THE CONTROL ASSURES THE CONTROL'S CABLE CONNECTORS WILL BE LOCATED DOWNWARD IN THE APPLICATION SO THAT WATER CANNOT RUN DOWN THE CABLES AND INTO THE CONTROL. Simply orient the new control to the motor's endshield,

insert bolts, and tighten. DO NOT OVERTIGHTEN THE BOLTS.

8c. IF REPLACING AN ECM 2.0 CONTROL WITH AN ECM 2.0

CONTROL (It is recommended that ECM 2.3 controls be used for all replacements), the new control must be attached to the motor using

through bolts identical to those removed with the original control. DO NOT OVERTIGHTEN THE BOLTS.

9. Reinstall the blower/motor assembly into the HVAC equipment.

Follow the manufacturer's suggested procedures.

10. Plug the 16-pin control plug into the motor. The plug is keyed.

Make sure the connector is properly seated and latched.

11. Plug the 5-pin power connector into the motor. Even though the plug is keyed, OBSERVE THE PROPER ORIENTATION. DO NOT FORCE THE CONNECTOR. It plugs in very easily when properly oriented. REVERSING THIS PLUG WILL CAUSE IMMEDIATE

FAILURE OF THE CONTROL MODULE.

12.

Final installation check. Make sure the motor is installed as follows: a. Unit is as far INTO the blower housing as possible. b.Belly bands are not on the control module or covering vent holes. c. Motor connectors should be oriented between the 4 o’clock and 8

o’clock positions when the blower is positioned in its final location and orientation.

d.Add a drip loop to the cables so that water cannot enter the motor

by draining down the cables. Refer to Figure 26.

The installation is now complete. Reapply the AC power to the HVAC equipment and verify that the new motor control module is working properly. Follow the manufacturer's procedures for disposition of the old control module.

Replacing ECM Control Module

To replace the control module for the GE variable-speed indoor blower motor you need to take the following steps:

1. You MUST have the correct replacement module. The controls are factory programmed for speciﬁc operating modes. Even though they look alike, different modules may have completely different functionality.

USING THE WRONG CONTROL MODULE VOIDS ALL PRODUCT WARRANTIES AND MAY PRODUCE UNEXPECTED RESULTS.

2. Begin by removing AC power from the furnace or air handler being serviced. DO NOT WORK ON THE MOTOR WITH AC POWER APPLIED. To avoid electric shock from the motor’s capacitors, disconnect power and wait at least 5 minutes before opening motor.

3. It is usually not necessary to remove the motor from the blower assembly. However, it is recommended that the whole blower assembly, with the motor, be removed from the furnace/air handler. (Follow the manufacturer’s procedures). Unplug the two cable connectors to the motor. There are latches on each connector. DO NOT PULL ON THE WIRES. The plugs remove easily when properly released.

4. Locate the two standard ¼" hex head bolts at the rear of the control housing (at the back end of the control opposite the shaft end). Refer to Figure 28. Remove these two bolts from the motor and control assembly while holding the motor in a way that will prevent the motor or control from falling when the bolts are removed. If an ECM2.0 control is being replaced (recognized by an aluminum casting rather that a deep-drawn black steel can housing the electronics), remove only the hex-head bolts. DO NOT REMOVE

THE TORX-HEAD SCREWS.

5. The control module is now free of mechanical attachment to the motor endshield but is still connected by a plug and three wires inside the control. Carefully rotate the control to gain access to the plug at the control end of the wires. With thumb and foreﬁnger, reach the latch holding the plug to the control and release it by squeezing the latch tab and the opposite side of the connector plug and gently pulling the plug out of the connector socket in the control. DO NOT PULL ON THE WIRES. GRIP THE PLUG ONLY.

6. The control module is now completely detached from the motor. Verify with a standard ohmmeter that the resistance from each motor lead (in the motor plug just removed) to the motor shell is >100K ohms. Refer to Figure 29. (Measure to unpainted motor end plate.) If any motor lead fails this test, do not proceed to install the control module. THE MOTOR IS DEFECTIVE AND MUST BE REPLACED. Installing the new control module will cause it to fail also.

7. Verify that the replacement control is correct for your application. Refer to the manufacturer's authorized replacement list. USING THE WRONG CONTROL WILL RESULT IN IMPROPER OR NO BLOWER OPERATION. Orient the control module so that the 3-wire motor plug can be inserted into the socket in the control. Carefully insert the plug and press it into the socket until it latches. A SLIGHT CLICK WILL BE HEARD WHEN PROPERLY INSERTED.

Finish installing the replacement control per one of the

three following paragraphs, 8a, 8b or 8c.

8a. IF REPLACING AN ECM 2.0 CONTROL (control in cast aluminum can with air vents on the back of the can) WITH AN ECM

2.3 CONTROL (control containing black potting for water protection in black deep-drawn steel case with no vents in the bottom of the can), locate the two through-bolts and plastic tab that are packed with the replacement control. Insert the plastic tab into the slot at the perimeter of the open end of the can so that the pin is located on the inside of the perimeter of the can. Rotate the can so that the tab inserts into the tab locater hole in the endshield of the motor. Using the two through-bolts provided with the replacement control, reattach the can to the motor.

THE TWO THROUGH-BOLTS PROVIDED WITH THE REPLACEMENT ECM 2.3 CONTROL ARE SHORTER THAN THE BOLTS ORIGINALLY REMOVED FROM THE ECM 2.0 CONTROL AND MUST BE USED IF SECURE ATTACHMENT OF THE CONTROL TO THE MOTOR IS TO BE ACHIEVED.

DO NOT OVERTIGHTEN THE BOLTS.

Simply orient the new control to the motor's endshield, insert bolts, and tighten. DO NOT OVERTIGHTEN THE BOLTS.

8c. IF REPLACING AN ECM 2.0 CONTROL WITH AN ECM 2.0

CONTROL (It is recommended that ECM 2.3 controls be used for all replacements), the new control must be attached to the motor using

through bolts identical to those removed with the original control. DO NOT OVERTIGHTEN THE BOLTS.

9. Reinstall the blower/motor assembly into the HVAC equipment. Follow the manufacturer's suggested procedures.

10. Plug the 16-pin control plug into the motor. The plug is keyed. Make sure the connector is properly seated and latched.

FAILURE OF THE CONTROL MODULE.

12. Final installation check. Make sure the motor is installed as follows: a. Unit is as far INTO the blower housing as possible. b. Belly bands are not on the control module or covering vent

holes.

c. Motor connectors should be oriented between the 4 o’clock

and 8 o’clock positions when the blower is positioned in its ﬁnal location and orientation.

d. Add a drip loop to the cables so that water cannot enter the

motor by draining down the cables. Refer to Figure 30.

Only remove Hex Head Bolts

ECM 2.0

Note: Use the shorter bolts and alignment pin supplied when replacing an ECM 2.0 control.

Figure 28 Figure 29

Figure 24

Figure 3

Control Disassembly

Motor Connector (3-pin)

ECM

2.3/2.5

Push until Latch Seats Over Ramp

From Motor

Circuit Board

Power Connector (5-pin)

Hex-head Screws

Motor

Motor Connector (3-pin)

Control Connector (16-pin)

Back of Control

Figure 25

Figure 4

Winding Test

Motor OK when R > 100k ohm

Figure 30

Figure 26

Figure 5

Drip Loop

Connector Orientation Between 4 and 8 o'clock

Drip Loop

Manual 2100-603B Page 41 of 44

FAN BLADE SETTING DIMENSIONS

Any service work requiring removal or adjustment in the fan and/or motor area will require that the dimensions in Table 7 be checked and blade adjusted in or out of the motor shaft accordingly.

R-410A REFRIGERANT CHARGE

This unit was charged at the factory with the quantity of refrigerant listed on the serial plate. AHRI capacity and efﬁciency ratings were determined by testing with this refrigerant charge quantity. Reference Table 8.

FIGURE 31

FAN BLADE SETTING

TABLE 7

FAN BLADE DIMENSIONS

MODEL

All

Q**H2D

Models

DIMENSION A

(INCHES)

.750

The following pressure tables show nominal pressures for the units. Since many installation speciﬁc situations can affect the pressure readings, this information should only be used by certiﬁed technicians as a guide for evaluating proper system performance. They shall not be used to adjust charge. If charge is in doubt, reclaim, evacuate and recharge the unit to the serial plate charge.

TABLE 8

SUBCOOLING AT LIQUID LINE

MODEL

RATED

CFM

Q24H2D 800 23 - 25 22 - 24

Q30H2D 1000 23 - 25 23 - 25

Q36H2D 1200 19 - 21 17 - 19

Q42H2D 1200 16 - 18 15 - 17

Q48H2D 1400 19 - 21 19 - 21

Q60H2D 1550 22 - 24 22 - 24

95°F OD

TEMPERATURE

82°F OD

TEMPERATURE

TABLE 9

INDOOR BLOWER PERFORMANCE

Model

Q24H2D o .10 0.5 800 N/A 800 700 800

Q30H2D .15 0.8 1000 N/A 1000 910 1000

Q36H2D .15 0.8 1200 1000 1000 1175 1000

Q42H2D .15 0.8 1200 1000 1000 1175 1000

Q48H2D .15 0.8 1400 1100 1100 1175 1250

Q60H2D .20 0.5 1550 1250 1100 1400 1250

NOTE: These units are equipped with a variable speed (ECM) indoor motor that automatically adjust itself to maintain

 Maximum ESP (inches WC) shown is with 1" thick disposable ﬁlter (reduced by .2 for 2" ﬁlter).

 Rated CFM for ducted applications – required for maximum performance rating. To obtain full CFM on models Q36H2D, Q42H2D, Q48H2D and

Q60H2D connect the pink jumper wire (provided) to terminal #G2 and #Y on the low voltage terminal block located in the circuit breaker box.

 Optional CFM – the unit is shipped from the factory set to operate at the optional CFM level shown. This provides lower operating sound levels for non-ducted, free discharge applications. This reduces system capacity performance by approximately 2% at the same energy efﬁciency.

 Continuous fan CFM is the total air being circulated during continuous fan mode.

 Indoor airﬂow during periods of high humidity when system is operating under control of optional humidistat for maximum humidity reduction.

o Model Q24H2D – when operating on 2nd stage heating the indoor air will increase to 1000 CFM.

Rated

ESP

approximately the same rate of indoor airﬂow in both heating and cooling, dry and wet coil conditions and at both 230/208 or 460 volts.



Max. ESP



Rated CFM



Optional

CFM



Continuous

CFM

CFM @

Max. ESP

Dehum.

CFM

Manual 2100-603B Page 42 of 44

TABLE 10

COOLING PRESSURE

(ALL TEMPERATURES IN DEGREES F)

MODEL

Q24H2

Q30H2

Q36H2

Q42H2

Q48H2

Q60H2

RETURN

AIR

TEMP.

75 DB

62 WB

80 DB

67 WB

85 DB

72 WB

75 DB

62 WB

80 DB

67 WB

85 DB

72 WB

75 DB 62 WB

80 DB 67 WB

85 DB 72 WB

75 DB 62 WB

80 DB 67 WB

85 DB 72 WB

75 DB 62 WB

80 DB 67 WB

85 DB 72 WB

75 DB 62 WB

80 DB 67 WB

85 DB 72 WB

PRESSURE

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

Low Side

High Side

 AIR TEMPERATURE ENTERING OUTDOOR COIL

75° 80° 85° 90° 95° 100° 105° 110° 115°

122 369

130 378

135 391

122 360

131 369

136 382

122 367

130 376

135 389

118 372

126 382

130 395

119 372

127 382

131 395

108 378

115 388

119 402

121 378

129 388

134 402

123 377

132 387

137 401

124 390

133 400

138 414

121 394

129 404

134 418

122 394

130 404

135 418

109 395

117 405

121 419

121 391

129 401

134 415

124 398

133 408

138 422

128 413

137 424

142 439

123 416

132 427

137 442

124 417

133 428

138 443

111 413

119 424

123 439

121 407

129 417

134 432

126 419

135 430

140 445

130 437

139 448

144 464

125 440

134 451

139 467

127 442

136 453

141 469

114 435

122 446

126 462

122 426

130 437

135 452

128 444

137 455

142 471

133 460

142 472

147 489

128 465

137 477

142 494

130 467

139 479

144 496

116 458

124 470

128 486

122 449

131 460

136 476

130 470

139 482

144 499

135 485

144 497

149 514

130 491

139 504

144 522

132 493

141 506

146 524

119 485

127 497

131 514

123 474

132 486

137 503

132 498

141 511

146 529

137 508

146 521

151 539

132 520

141 533

146 552

134 522

143 535

148 554

121 513

129 526

134 544

125 503

134 516

139 534

134 528

143 542

148 561

137 533

147 547

152 566

134 549

143 563

148 583

135 550

144 564

149 584

123 544

132 558

137 578

128 535

137 549

142 568

136 561

145 575

150 595

138 558

148 572

153 592

136 579

145 594

150 615

136 580

145 595

150 616

126 577

135 592

140 613

Low side pressure ± 4 psig High side pressure ± 10 psig

Tables are based upon rated CFM (airﬂow) across the evaporator coil. If there is any doubt as to correct operating charge being in the system, the charge should be removed, system evacuated and recharged to serial plate instructions.

 75°F outdoor temperature condenser fan motor is running on low speed.

When the system is operating in the dehumidiﬁcation mode, the suction pressure will be reduced by 4 to 8 psig and the discharge pressure will be reduced by 19 to 22 psig.

Manual 2100-603B Page 43 of 44

TABLE 11

HEATING PRESSURE

(ALL TEMPERATURES IN DEGREES F)

RETURN

MODEL

AIR

TEMP.

Q24H2D 70

Q30H2D 70

Q36H2D 70

Q42H2D 70

Q48H2D 70

Q60H2D 70

PRESSURE

Low Side

High Side35273422844929556307623186932976340833518936296374

Low Side

High Side33278402904730354315613276734074352813648837795389

Low Side

High Side33266402754728553295603056731574325803348734494354

Low Side

High Side2926536275422864929656306633177032777337833479035897368

Low Side

High Side3126837280442915130258314643257133678348853599237098382

Low Side

High Side2225730270372824429552308593206633373346813588837195384

0 5 10 15 20 25 30 35 40 45 50 55 60 65

AIR TEMPERATURE ENTERING OUTDOOR COIL

103 385

102 401

100 364

110 396

109 414

107 374

104 378

105 393

103 396

116 407

116 426

114 384

111 389

112 404

110 409

TABLE 12

DEHUMIDIFICATION RELAY LOGIC BOARD

Inputs to Board Outputs From Board

NOTES G Y B W2 E1 A1 D RAT G1 BK YO RV W E1 A2 TWV

Cooling Mode Unoccupied 1 X X X X X X X

Cooling Mode Occupied 1 X X X X X

123 418

122 438

121 393

117 399

119 416

117 422

1st Stage Heating Occupied 2 X X X X X X X X X

1st Stage Heating Unoccupied 2 X X X X X X X

2nd Stage Heating Occupied 3 X X X X X X X X X X X

2nd Stage Heating Unoccupied 3 X X X X X X X X X

Emergency Heat X X X X X X

Dehumidiﬁcation Occupied 4 X X X X X X

Dehumidiﬁcation Unoccupied 4 X 5 5 5 5

Dehumidiﬁcation w/RAT Closed X X X X X X X

Fan Only Occupied X X X X

Fan Only Unoccupied X X

NOTES:

1. Cooling takes precedence over dehumidiﬁcation. A cooling call will cancel dehumidiﬁcation.

2. Dehumidiﬁcation takes precedence over ﬁrst stage heating.

3. A second stage heating call cancels dehumidiﬁcation.

4. The relay logic board has a jumper on it to choose between full-time dehumidiﬁcation and occupied dehumidiﬁcation only. With the jumper in the 1-2 position dehumidiﬁcation is available full-time. With the jumper in the 2-3 position dehumidiﬁcation is available only when the room is occupied. The room is considered occupied when the A1 terminal is energized.

5. These outputs will be energized if the jumper is in the full time dehumidiﬁcation position. They will be off if the jumper is in the occupied dehumidiﬁcation only position.

Manual 2100-603B Page 44 of 44

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