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Summary of Contents for Johnson Controls DSH024B-120B
- Page 1 MODEL DSH AIR CONDITIONING UNIT Supersedes: 145.32-IOM3 (312) Form 145.32-IOM3 (1213) INSTALLATION, OPERATION, MAINTENANCE MODEL DSH024B-120B HORIZONTAL R-410A AIR CONDITIONING UNIT STYLE B Issue Date: December 28, 2013...
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Page 2: Safety Symbols
All wiring must be in accordance with published specifications and must be performed ONLY by qualified service personnel. Johnson Controls will not be responsible for damages/problems resulting from improper connections to the controls or application of improper control signals. -
Page 3: Table Of Contents
FORM 145.32-IOM3 (1213) CHANGEABILITY OF THIS DOCUMENT In complying with Johnson Controls policy for continu- It is the responsibility of operating/service personnel as ous product improvement, the information contained in to the applicability of these documents to the this document is subject to change without notice. -
Page 4: Typical Installation Diagrams
FORM 145.32-IOM3 (1213) DSH024B-DSH060B – SINGLE COMPRESSOR UNIT – TYPICAL INSTALLATION DIAGRAM JOHNSON CONTROLS... - Page 5 FORM 145.32-IOM3 (1213) DSH096B/120B – DUAL COMPRESSOR UNIT – TYPICAL INSTALLATION DIAGRAM JOHNSON CONTROLS...
- Page 6 C = Corrosion Protective Coating Cabinet Configuration D = Stainless Steel Drain Pan P = Single Pacakage (Std) F = Coated Coil w/ S-S Drain Pan S = Factory Split (Charged R-410A) N = Factory Split (Nitrogen Charge Only) JOHNSON CONTROLS...
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Page 7: General Information
Repair any damage prior to installation to slightly pitched in the same direction as drain pan ensure safe operation. outlet. RECORD ANY UNIT DAMAGE ON THE BILL OF LADING AND REPORT TO CARRIER AND FACTORY IMMEDIATELY. SHIPPING AND HANDLING DAMAGES ARE NOT WARRANTY ITEMS. JOHNSON CONTROLS... -
Page 8: Cabinet Configurations/Unit Mounting
(see picture below showing a Units may be either hung, or floor mounted. If unit is to packaged unit with couplings). be hung, use all mounting points indicated – JOHNSON CONTROLS... - Page 9 This will allow best access reconnection, attachment When assembling the couplings ensure the following: extended line set in the case of a split system. 4) Remove the interconnecting wiring between the evaporator and condenser electrical panel. Disconnect the wire terminations in the JOHNSON CONTROLS...
- Page 10 3) Using a back-up wrench tighten the female union nut until a definite increase in resistance is felt. At this point most of threads will have been covered by the nut. Ensure that the JOHNSON CONTROLS...
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Page 11: Physical Data
OPTI ONAL CONDENSER I NTAKE OPTIONAL RETURN AIR (FIELD CONVERTIBLE) (FIELD CONVERTIBLE) RETURN CONDENSER I NTAKE EVAPORATOR CONDENSER SECTION SECTI ON CONDENSER SUPPLY DISCHARGE AI R 29.00 C.C. 38.00 C.C. 71.88 C.C. FRONT NOTE: DI MENSI ON TOLERANCE I S 1/ 16" JOHNSON CONTROLS... - Page 12 ( FI ELD CONVERTI BLE) (FI ELD CONVERTIBLE) CONDENSER I NTAKE RETURN AI R EVAPORATOR CONDENSER SECTI ON SECTI ON CONDENSER DI SCHARGE SUPPLY AI R 35.62 C.C. 40.00 C.C. 80.50 C.C. FRONT NOTE: DI MENSION TOLERANCE I S 1/ 16" JOHNSON CONTROLS...
- Page 13 TX VALVE & FILTER DRIER ACCESS PANEL EVAPORATOR OPENING BACK VIEW CONDENSER INTAKE 112.00 EVAPORATOR CONDENSER SECTION SECTION RETURN CONDENSER EVAPORATOR SECTION SECTION SUPPLY 48.00 C.C. 52.00 C.C. 2.94 106.13 NOTE: DIMENSION TOLERANCE IS 1/16" CONDENSER DISCHARGE TOP VIEW JOHNSON CONTROLS...
- Page 14 3/4" NPT DRAIN 39.88 CONDENSER INTAKE VIEW ACCESS ACCESS PANEL CONNECTION EVAPORATOR DISCHARGE EVAPORATOR INTAKE BACK VIEW LEFT VIEW EVAPORATOR CONDENSER CONDENSER INTAKE SECTION SECTION 70.88 60.88 RETURN SUPPLY 55.00 C.C. 65.00 C.C. 2.94 CONDENSER TOP VIEW DISCHARGE JOHNSON CONTROLS...
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Page 15: Service Clearances And Corner Weights
2-5 TON HORIZONTAL A/C UNIT SERVICE CLEARANCES FRONT EVAPORATOR CONDENSER FAN ACCESS FAN ACCESS 4 IN. MINIMUM CLEARANCE (FOR DRAIN TRAP) 36 IN. MINIMUM CLEARANCE RETURN CONDENSER INTAKE CONDENSER EVAPORATOR SECTION SECTION CONDENSER DISCHARGE SUPPLY 36 IN. MINIMUM CLEARANCE JOHNSON CONTROLS... - Page 16 8 TON HORIZONTAL A/C UNIT SERVICE CLEARANCES BACK VIEW 4 IN. MINIMUM CLEARANCE (FOR DRAIN TRAP) CONDENSER INTAKE 36 IN. MINIMUM CLEARANCE EVAPORATOR CONDENSER SECTION SECTION RETURN CONDENSER EVAPORATOR SECTION SECTION SUPPLY 36 IN. MINIMUM CLEARANCE 36 IN. MINIMUM CLEARANCE TOP VIEW JOHNSON CONTROLS...
- Page 17 FORM 145.32-IOM3 (1213) UNIT CORNER WEIGHTS JOHNSON CONTROLS...
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Page 18: Interconnecting Refrigerant Tubing
To determine the free area required for any given unit, adhere to the following guidelines: - Size condenser intakes 500-750 feet/minute nominal velocity (Maximum recommended 800 feet/minute) - Size condenser air discharge for 1,200-1,500 feet /minute nominal velocity (Maximum recommended 1,700 feet/minute) JOHNSON CONTROLS... -
Page 19: Electrical Wiring
If canvas flexible joints are used on ductwork, install a ground wire to the ductwork as well. Unit requires installer provide 24volt thermostat with appropriate heating and cooling stages as needed. JOHNSON CONTROLS... -
Page 20: Typical Wiring Schematics
FORM 145.32-IOM3 (1213) TYPICAL WIRING SCHEMATICS JOHNSON CONTROLS... - Page 21 FORM 145.32-IOM3 (1213) JOHNSON CONTROLS...
- Page 22 FORM 145.32-IOM3 (1213) JOHNSON CONTROLS...
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Page 23: Nameplate Electrical Data
ELECTRICAL DATA - OVERSIZED CONDENSER MOTOR EVAP MAX FUSE / COMPRESSOR COND FAN MODEL # VOLTAGE CCT. BKR. 58.28 DSH120B2 208-230/3/60 15.9 110.0 3.00 5.00 14.0 26.78 DSH120B4 460/3/60 52.0 3.00 5.00 20.18 DSH120B5 575/3/60 39.5 3.00 5.00 JOHNSON CONTROLS... -
Page 24: Fan Performance Data
2. At higher evaporator airflows and wet bulb conditions, condensate carry-over may occur. Decrease airflow downward as necessary. 3. Field Supplied Low Static Drive. CONDENSER FAN PERFORMANCE AVAILABLE EXTERNAL STATIC PRESSURE - Inches W.C. OUTDOOR Standard Factory Drive Hi-Static Drive 2100 0.35 0.44 0.54 0.68 0.75 JOHNSON CONTROLS... - Page 25 2. At higher evaporator airflows and wet bulb conditions, condensate carry-over may occur. Decrease airflow downward as necessary. CONDENSER FAN PERFORMANCE AVAILABLE EXTERNAL STATIC PRESSURE - Inches W.C. OUTDOOR Standard Factory Drive Hi-Static Drive 2900 0.67 0.81 0.96 1.10 1.25 1.40 1.50 JOHNSON CONTROLS...
- Page 26 3. At higher evaporator airflows and wet bulb conditions, condensate carry-over may occur. Decrease airflow downward as necessary. CONDENSER FAN PERFORMANCE AVAILABLE EXTERNAL STATIC PRESSURE - Inches W.C. OUTDOOR Standard Factory Drive + 3 HP Optional Oversized Motor + 5 HP 1.98 2.24 2.52 2.80 3.08 3.36 3.66 1033 3.96 1075 4.26 6400 JOHNSON CONTROLS...
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Page 27: Motor And Drive Data
AK66H 4L500 DSH036B 585-877 0.75 1.9-2.9 1VP34X5/8 AK61H 4L490 DSH048B 556-835 88.5 1.9-2.9 1VP34X7/8 AK64H AX51 DSH060B 568-926 88.5 1.9-2.9 1VP34X7/8 AK59H AX50 DSH096B 603-805 88.5 2.8-3.8 1VP44X1 1/8 AK89H AX52 DSH120B 837-1027 88.5 4.4-5.4 1VP56X1 1/8 BK95H JOHNSON CONTROLS... -
Page 28: Blower Rpm Adjustment
"B" belts. 4) Once the pulley has been opened/closed the appropriate number of turns, replace the external key and tighten the adjustment setscrew. Proper torque is 110-130 in.-lbs. 5) Install drive belt and adjust motor mount to tension belt. JOHNSON CONTROLS... -
Page 29: Low Ambient Operation / Damper Kit Installation
Low Ambient Damper Kit installation for wiring, is attached to a field-installed mounting instructions ‘FORM 145.10-IOM2 (412)’. bracket. Appropriate mounting hardware for the pressure control module and the damper actuator motor provided with kit. JOHNSON CONTROLS... -
Page 30: Start-Up And Operation
Circuit 2 Circuits DSH024B 7.30 DSH036B 8.60 DSH048B 10.50 DSH060B 11.20 DSH096B 11.40 11.65 DSH120B 16.00 16.20 Note: Unit factory-split and factory charged are charged with 2/3 of charge in condenser and 1/3 of charge in evaporator module. JOHNSON CONTROLS... -
Page 31: Microprocessor Controller
(closed during the 30-second monitoring period as has a delay of 10 seconds between operations. described above), the microprocessor control board will continue to monitor the low-pressure limit switch for any openings. If the low-pressure switch opens for JOHNSON CONTROLS... -
Page 32: Safety Controls
An anti-short cycle delay (ASCD) is utilized to prevent short cycling of the compressor. Additionally, a minimum run time is imposed any time a compressor is energized. The ASCD is initiated on unit start-up and on any compressor reset or lockout. JOHNSON CONTROLS... -
Page 33: Microprocessor Flash Codes
Compressor(s) locked out due to Economizer running (Free Cooling) * 13 Flashes Compressor Held Off due to Low Voltage 14 Flashes EEPROM Storage Failure No Power or Control Failure Note: Flash rates marked with * are NOT alarms. JOHNSON CONTROLS... -
Page 34: Maintenance/Service
Check bearings for any DSH120B 4 - 20x16x2 signs of wear (movement between inner and outer races). Ensure bearing locking collars are secure to LD13547 BELT TENSION ADJUSTMENT DEFLECTION FORCE VERSUS DRIVE BELT CROSS-SECTION JOHNSON CONTROLS... -
Page 35: R-410A Service Procedures - Quick Reference Guide
Do not use an R-22 TXV. If a TXV is to be used, it must be an R-410A TXV. • Never open system to atmosphere when under vacuum. • If system must be opened for service, evacuate system then break the vacuum with dry nitrogen and replace filter driers. JOHNSON CONTROLS... - Page 36 P.O. Box 1592, York, Pennsylvania USA 17405-1592 800-861-1001 Subject to change without notice. Printed in USA Copyright © by Johnson Controls 2013 www.johnsoncontrols.com ALL RIGHTS RESERVED Form 145.32-IOM3 (1213) Issue Date: December 28, 2013 Supersedes: March 28, 2012...
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