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21

Fig. 29 — 

Air Vents

Direct Expansion (DX) Systems

NOTE: Operation of DX equipped fan coils at any fan speed other

than high fan speed is not approved and will void the manufactur

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er's limited warranty.

Do not operate fan coils with a DX evaporator coil plus contigu

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ous hydronic coil without use of a suitable glycol solution that is

approved for use by the manufacturer. Failure to follow this in

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struction will void the manufacturer's limited warranty.

Should the evaporator freeze due to inadequate airflow for any

reason, damage may occur to adjacent water or steam coil tubing.

This type of issue is due to product misapplication and voids the

manufacturer's limited warranty.

Air Balance System

All  ductwork  must  be  complete  and  connected. All  filters  and

access  doors  and  panels  must  be properly installed to  establish

actual  system  operating  conditions  BEFORE  beginning  air

balancing operations.

Each individual unit and the attached ductwork is a unique system

with its own operating characteristics. For this reason, air balanc

-

ing is normally done by balance specialists who are familiar with

all procedures required to properly establish air distribution and

fan-system operating conditions. These procedures shall not be at

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tempted by unqualified personnel.

After proper system operation is established, the actual unit air de

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livery  and  the  actual  fan  motor  amperage  draw  for  each  unit

should be recorded in a convenient place for future reference.

Motor/Blower Assembly

Fan operation type is determined by the control components and

their method of wiring. This may vary from unit to unit. Refer to

the wiring diagram attached to each unit for individual operating

characteristics. See Tables 5-7 for motor performance and heater

availability.

All  motors have  permanently lubricated  ball  bearings. No  field

lubrication is required.

Should  the  motor/blower  assembly  require  service,  it  may  be

removed from unit to facilitate operations such as motor or blower

wheel/housing replacement, etc.

Dirt and dust must not be allowed to accumulate on blower wheel

or housing. This can result in an unbalanced blower wheel condi

-

tion which will damage a blower wheel or motor. The wheel and

housing must be cleaned periodically using a vacuum cleaner and

a brush taking care not to dislodge factory balancing weights on

the blower wheel blades.

Electronically Commutated Motor (ECM)

All 42DH/DV units are equipped with Electronically Commutated

Motors (ECM) — constant speed brushless DC, which are easily

adjustable  in  the  field  for  desired  performance.  Motors  are

pre-programmed  for  constant  speed  mode.  1/2  HP  and  1  HP

motors have integrated control module with overload and short

circuit  protection.  1-1/2  HP  and  3  HP  motors  have  remote

mounted control module with overload and short circuit protec

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tion. Control module is mounted in the cabinet interior.

Control Board Adjustment

Adjusting the low, medium and high potentiometer requires the

use of multi-meter capable of measuring 0-10 vdc. (See Fig. 30.)

Fig. 30 — 

Motor Control Board

When the 42DH/DV unit is shipped from the factory with motor

control board (which has High, Med and Low airflow settings),

it is pre-programmed at the factory to “High” speed and delivers

the airflow and cooling/heating capacity specified at the time of

order, while Medium and Low speeds are set to defaults based

on High speed. Should airflow require adjustment after installa

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tion, the control board settings for Low, Medium and High could

be adjusted by turning screws (as shown in Fig. 30) using a small

Phillips  screwdriver.  It  will  adjust  the  control  voltage  to  the

motor. A clockwise rotation increases the voltage to the motor,

while counter clockwise rotation reduces it.

IMPORTANT: The air vent provided on the unit is not intended

to  replace  the  main  system  air  vents  and  may  not  release  air

trapped in other parts of the system. Independently inspect the

entire system for potential air traps and vent those areas as re

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quired. In addition, some systems may require repeated venting

over a period of time to properly eliminate air from the system.

WARNING

Failure to follow this warning could result in personal injury or

death. Please wait 5 minutes after disconnecting power before

opening the motor.

Manual Air Vent

Automatic Air Vent

CAUTION

Only trained and qualified individuals should attempt to adjust

or service components on any energized electrical equipment.

Failure to follow established safety rules and guidelines could

result in serious injury or death.

IMPORTANT: On 42DH/DV units with electric heat the factory

default setting for low airflow prevents nuisance tripping of the

electric  heat  protection  circuit.  Turning  the  low  speed  screw

counter clockwise can cause interruptions in the heating perfor

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mance of the unit due to the activation of this protective circuit.

CAUTION

Turning the voltage up past the setting for high speed may in

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troduce the risk of condensate blow off which may result in

damage to the unit.

L2

LOW

MED

HIGH

VR1

VR2

VR3

K1

K2

K3

LOW

MED

HIGH

COM

C1

C2

C3

CR1

L1

POTS

Содержание 42DH

Страница 1: ...ns and have a fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions attached to the unit Consult local building codes and appropriate national electrical c...

Страница 2: ...ity for per sonal injury or property damage resulting from improper or unsafe practices during the handling installation service or operation of any equipment CAUTION Disconnect all power prior to any...

Страница 3: ...confirm incoming and control power requirements match available power source Refer to unit nameplate and wiring diagram 1 Review all tags on unit to determine if shipping screws are to be removed Rem...

Страница 4: ...rnished and Installed 5 8 Knockouts For Suspension rods 4 Places top and 4 places Bottom of unit Threaded rod suspension Field Furnished and installed Trapeze Recommended on Unit size 30 Minimum Recom...

Страница 5: ...nces Top View 29 In Minimum Recommened Clearance 29 In Minimum Recommened Clearance 29 In Minimum Recommened Clearance Filter Piping Package For drain pan or coil removal the recommended clearance sho...

Страница 6: ...ouble wall cabi net construction For a different coil and cabinet options use the weight correction factor table Table 1 Total Unit Weight Adjustment NOTES 1 Unit weights shown in pounds 10 are based...

Страница 7: ...Fig 8 All hardware required for assembly is included and the base rails are letter coded for ease of assembly See Fig 9 Fig 8 Base Rails Fig 9 Letter Coding on Base Rail Parts PLACE UNIT ON THE BASE...

Страница 8: ...mixing box with supplied No 8 x 1 2 in sheet metal screws two per side See Fig 12 For bottom entering configurations length adjustments to the bot tom damper shaft may need to be completed prior to fi...

Страница 9: ...lter access panel See Fig 14 Fig 14 Optional Mixing Box 3 76 A C 2 4 61 4 102 H 2 4 61 3 76 1 25 2 51 2 51 W B Top Views BTM Rear Inlet 42DH Top Rear Inlet 42DH Top Front Inlet 42DV W 4 102 2 4 61 C 1...

Страница 10: ...rence at any point during travel Tighten rod clamp of swivel onto each damper rod Fig 17 Install Damper 7 Confirm correct operation of dampers Adjust as needed Tighten remaining fasteners Step 3 Conne...

Страница 11: ...5 1 2 0 625 1 2 0 625 16 22 1 1 125 1 1 125 1 1 125 1 1 125 1 2 0 625 30 1 1 2 1 625 1 1 2 1 625 1 1 2 1 625 1 1 2 1 625 1 2 1 625 HR CR CS HS Return Air Drain LH TELL TALE RH TELL TALE LEGEND 2 Verti...

Страница 12: ...16 1 LH 10 5 8 7 3 4 12 9 5 8 7 RH 13 3 8 9 5 8 7 2 12 7 16 3 8 13 5 8 10 3 8 7 9 16 6 7 3 4 15 5 8 8 1 8 1 LH 10 5 8 7 3 4 12 11 13 16 9 3 16 RH 13 3 8 11 13 16 9 3 16 2 12 7 16 3 8 13 5 8 12 1 2 9 3...

Страница 13: ...06 12 0 375 1 4 3 4 0 875 1 2 0 625 1 2 0 625 16 22 0 375 1 4 1 1 125 1 1 125 1 2 0 625 30 0 625 1 2 1 1 2 1 625 1 1 2 1 625 1 1 2 1 625 LEGEND HR HS SL LL Return Air Drain LH TELL TALE RH TELL TALE N...

Страница 14: ...1 2 2 3 4 6 1 4 5 1 8 17 1 8 3 3 4 2 5 8 2 5 8 6 2 4 4 7 8 3 1 4 3 1 4 6 16 4 6 1 2 7 1 8 12 1 2 2 3 4 6 1 4 5 1 8 17 1 8 3 3 4 2 5 8 2 5 8 6 2 4 6 3 8 10 13 5 8 6 6 8 4 1 8 2 5 8 6 20 22 4 6 1 2 7 1...

Страница 15: ...WIDTH HEIGHT SUPPLY DUCT RETURN DUCT MOUNTING HOLES AUX CTRL BOX M A B C D E F G J K L 06 9 x 6 36 28 19 3 4 8 7 8 10 7 8 13 3 4 2 1 4 24 1 4 14 2 3 4 27 1 4 35 1 4 5 3 4 2 08 9 x 6 36 28 19 3 4 8 7...

Страница 16: ...tors and or cabinet lighting option not required with low voltage 0 10v controls UNIT SIZE FAN SIZE DEPTH UNIT DEPTH WIDTH HEIGHT SUPPLY DUCT RETURN DUCT MIX BOX MOUNTING HOLES AUX CTRL BOX M A B C D...

Страница 17: ...g UNIT SIZE FAN SIZE DEPTH WIDTH HEIGHT SUPPLY DUCT FLANGE RETURN DUCT FLANGE AUX CTRL BOX UNIT SIDE TO DUCT FLANGE UNIT BOTTOM TO DUCT FLANGE A B C E F L M N 06 9 x 6 20 28 36 1 2 8 7 8 10 7 8 15 1 8...

Страница 18: ...field installation of actuator Kit consists of 2 crank arms 2 swivels and either a 25 in sizes 06 16 or 34 in sizes 20 30 length of 5 16 in rod 10 Add 2 in if using a prefilter or 4 in filter UNIT SIZ...

Страница 19: ...ld wiring shall be made in compliance with all governing codes and ordinances Compliance with all codes is the responsibility of the installing contractor All components furnished for field installati...

Страница 20: ...sible before beginning any system balancing Cooling Heating System Prior to the water system start up and balancing flush the chilled hot water systems to clean out dirt and debris which may have coll...

Страница 21: ...tronically Commutated Motors ECM constant speed brushless DC which are easily adjustable in the field for desired performance Motors are pre programmed for constant speed mode 1 2 HP and 1 HP motors h...

Страница 22: ...low rates in a convenient place for future reference Before and during water system balancing conditions may exist due to incorrect system pressures which may result in noticeable water noise or undes...

Страница 23: ...air through the coil fins from the leaving air face This should again be followed by vacuuming Units equipped with regularly replaced air filters will require less frequent coil cleaning Electric Res...

Страница 24: ...ed main drain line by flow from tell tale connection Should algae and or bacteria growth become a concern con sult an air conditioning and refrigeration supply organization familiar with local conditi...

Страница 25: ...Detail Y Detail Y Filter Support Angle Bracket Filter Support Angle Bracket 1 Filter Slot 2 Filter Slot D See Detail Y See Detail X Detail X Detail Y Magnets C 2 Filter 1 Filter 4 Filter B A D 2 Filt...

Страница 26: ...h Control Board Fig B No Electric Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit WARNING Wiring d...

Страница 27: ...WIRING DIAGRAM EXAMPLES cont Fig C Single Element Heater Single Stage Heat Single Phase Power with Control Board WARNING Wiring diagrams are pro vided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 28: ...28 Fig D Two Element Heater Single Stage Heat Single Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 29: ...CAL WIRING DIAGRAM EXAMPLES cont Fig E Two Element Heater Two Stage Heat Single Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM at...

Страница 30: ...30 Fig F Three Element Heater Single Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 31: ...AL WIRING DIAGRAM EXAMPLES cont Fig G Six Element Heater Single Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM a...

Страница 32: ...32 Fig H Six Element Heater Two Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 33: ...L WIRING DIAGRAM EXAMPLES cont Fig I Nine Element Heater Single Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM a...

Страница 34: ...34 Fig J Nine Element Heater Two Stage Heat Three Phase Power with Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 35: ...Power with Control Board Fig L No Electric Heat Single Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit WA...

Страница 36: ...Board Fig N Single Element Heater Single Stage Heat Single Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 37: ...L WIRING DIAGRAM EXAMPLES cont Fig O Two Element Heater Two Stage Heat Single Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM a...

Страница 38: ...38 Fig P Three Element Heater Single Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 39: ...WIRING DIAGRAM EXAMPLES cont Fig Q Six Element Heater Single Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 40: ...40 Fig R Six Element Heater Two Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 41: ...WIRING DIAGRAM EXAMPLES cont Fig S Nine Element Heater Single Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 42: ...42 Fig T Nine Element Heater Two Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM attached to the unit...

Страница 43: ...WIRING DIAGRAM EXAMPLES cont Fig U Nine Element Heater Three Stage Heat Three Phase Power without Control Board WARNING Wiring diagrams are provided as an example only ALWAYS refer to WIRING DIAGRAM...

Страница 44: ......

Страница 45: ......

Страница 46: ...the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53420022 01 Printed in U S A Form 42DHV 2SI Pg 46 1 22 Replaces...

Страница 47: ...Y N __________ ARE FURNISH ONLY PARTSACCOUNTED FOR Y N __________ IS THE UNIT ARRANGEMENT HAND CORRECT Y N __________ IS THE UNIT STRUCTURAL SUPPORT COMPLETEAND CORRECT Y N __________ Handling and Ins...

Страница 48: ...YTRAP IS DEEP ENOUGH __________ PRIME THE TRAPWITH WATER __________ CHECK SUPPLYAND RETURN WATER CONNECTIONS FOR LEAKS __________ FILL SYSTEMS WITH WATER REFRIGERANT __________ OPENAIR VENT ON TOP OF...

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