Carrier 42C Series Installation Instructions Manual
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Carrier 42C Series Installation Instructions Manual

Fan coil air conditioners
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Installation, Start-Up, and Service Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unpack and Inspect Units . . . . . . . . . . . . . . . . . . . . . 3
Unit Protection from Damage . . . . . . . . . . . . . . . . . . 3
Prepare Jobsite for Unit Installation . . . . . . . . . . . . . 3
Identify and Prepare Units . . . . . . . . . . . . . . . . . . . . . 3
Unit Clearance and Service Access . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Ceiling Unit Installation . . . . . . . . . . . . . . . . . . . . 64
Step 2 - Place Units in Position . . . . . . . . . . . . . . . 64
Step 3 - Make Piping Connections . . . . . . . . . . . . 69
Cooling and Heating Connections . . . . . . . . . . . . . 69
Step 5 - Make Ductwork Connections . . . . . . . . . . 77
Step 6 - Frame and Finish Unit . . . . . . . . . . . . . . . 78
Step 8 - Make Final Preparations . . . . . . . . . . . . . 78
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53420021-01
Page
Printed in U.S.A.
Form 42-8SI
Fan Coil Air Conditioners
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Cooling/Heating System . . . . . . . . . . . . . . . . . . . . . .78
Direct Expansion (DX) Systems . . . . . . . . . . . . . . . .79
Air System Balancing . . . . . . . . . . . . . . . . . . . . . . . .79
Maximum External Static Pressures . . . . . . . . . . . .79
Water System Balancing . . . . . . . . . . . . . . . . . . . . . .79
Water Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Motor/Blower Assembly . . . . . . . . . . . . . . . . . . . . . .80
To Clean Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Electric Heater Assembly . . . . . . . . . . . . . . . . . . . . .80
Electrical Wiring and Controls . . . . . . . . . . . . . . . . .81
Filters, Throwaway . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Filters, Permanent . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Valves and Piping . . . . . . . . . . . . . . . . . . . . . . . . . . .81
APPENDIX A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
APPENDIX B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
APPENDIX C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
It is important to recognize safety information. This is the
safety-alert symbol
. When you see this symbol on the unit and
in instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
Pg 1
42C,D,V Series
3-23
Replaces: 42-7SI

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Summary of Contents for Carrier 42C Series

  • Page 1: Table Of Contents

    42C,D,V Series Fan Coil Air Conditioners Installation, Start-Up, and Service Instructions CONTENTS START-UP ........78 General .
  • Page 2 injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, WARNING or operation. This product can expose you to chemicals including Acrylamide, which is known to the State of California to cause cancer and birth WARNING defects or other reproductive harm.

  • Page 3: Introduction

    Carrier should be notified. In the event a claim for shipping Horizontal plenum type 42CE units may be shipped with a damage is filed, the unit, shipping carton, and all packing must be bottom return-air inlet.

  • Page 4: Unit Clearance And Service Access

    Unit Clearance and Service Access HI-PERFORMANCE UNIT CLEARANCE AND SERVICE ACCESS CLEARANCE For specific unit dimensions, refer to the product technical catalog for your model. Provide adequate clearance for the removal of the Units have either right or left hand piping. Reference piping loca- panel, access to controls or replacement of internal serviceable tions by facing the front of the unit (airflow discharges from the components including air filters.
  • Page 5 42DA Unit Clearance and Service Access 42DC Unit Clearance and Service Access 28 in. [711] Controls Piping Side Piping Side Controls Side Side 12-18 in. 12-18 in. 28 in. [305-457] [305-457] [711] 28 in. 28 in. [711] [711] 42DE Unit Clearance and Service Access 42DF Unit Clearanceand Service Access 28 in.
  • Page 6 42VAD Units 42VBD/VFD Units 8 in. [203] from flange both sides 24 in. [610] 36 in. 36 in. [914] [914] 42VCA/VEA Units 24 in. [610] 36 in. [914] Vertical Floor Dimensions UNIT DIMENSIONS - in. (mm) SIZE 42VAD 42VBD/VFD 42V*D 23-1/2 [597] 41 [1041] 27-1/2 [699]...
  • Page 7 Table 1 — Physical Data — 42C Series Units UNIT SIZE 42C NOMINAL AIRFLOW (cfm) 1000 1200 SHIPPING WEIGHT (lb) 42CA 42CE 42CG 42CK COIL WATER WEIGHT (Approx lb per row of coil) 42CA/CE/CG/CK COILS 10 fins/in. Coil Face Area (sq ft)
  • Page 8 Table 2 — Physical Data — 42D Series UNIT SIZE 42D NOMINAL AIRFLOW (cfm) 1000 1200 1400 1600 1800 2000 SHIPPING WEIGHT (lb) 42DA 42DC 42DE 42DF 42DD COIL WATER WEIGHT (Approx lb per row of coil) COILS 10 fins/in. Coil Face Area (sq ft) MOTOR (qty) BLOWER (qty)
  • Page 9 Table 3 — Physical Data — 42V Series UNIT SIZE 42V NOMINAL AIRFLOW (cfm) 1000 1200 SHIPPING WEIGHT (lb) 42VAD — 42VBD — 42VFD — 42VCA — — — — 42VEA — — — — 42VGA — — — — —...
  • Page 10 Drip Lip Optional Unit Label and with Valve Pkg Service See Notes e,g,h Wiring Diagram Switch Shipped Loose (See Note f) Fleixible Metal Conduit- (See Note d) See Dimension “J” 5-3/4 [147] Max. 9-1/4 [236] 21-3/8 [50.6] Max. [543] Resilient Mounting Grommet with 3/8 [10] Dia.
  • Page 11 Drip Lip with See Note e Optional Unit Label and Valve Pkg Wiring Diagram Service Flexible Metal Shipped Loose Switch (See Note f) Conduit- See (See Note d) Electric Heat Dimension "J" Limit Switch 7-3/4 [199] MAX Electric Heater Element 9-1/4 [236] MAX Resilient Mounting...
  • Page 12 Drip Lip with Rear/Bottom Return [152] Valve Pkg Max. Rear Mtg. Holes Shipped Loose Unit Label and Optional (See Note d) Wiring Diagram Service 7/8 [22] (See Note f) Switch O.D. (Underneath) Condensate Drain 21-9/16 [51] 4-1/4 [548] 15 [382] [108] 2-1/8 See Note...
  • Page 13 Drip Lip [153] Rear/Bottom Return with Valve Pkg Max. Shipped loose Unit Label and (See Note d) Rear Mtg. Holes Wiring Diagram Filter Removal (See Note f) Both Sides Resilient Mounting 4-1/4 Optional Grommet with 3/8 [10] [108] Service Dia. Holes (Typ. of 4) 2-1/8 Switch [53]...
  • Page 14 Drip Lip With Valve Pkg Rear/Bottom Return Unit Label and Wiring (Shipped Loose) Diagram (See Note f) (See Note d) 6-1/4 Rear Mtg. Hole [160] Optional Service Max. Resilient Mounting Switch Grommet with 3/8 [10] (Underneath) Dia. Holes (Typ. of 4) Strip Heater 4-1/4 21-9/16...
  • Page 15 Drip Lip with 6-1//4 Valve Pkg [160] Shipped Loose Rear/Bottom Return Unit Label and Max. (See Note d) Wiring Diagram (See Note f) Rear Mtg. Holes Filter Removal Resilient Mounting Both Sides Grommet with 3/8 [10] Dia. holes (Typ. of 4) 4-1/4 2-1/8 Strip Heater...
  • Page 16 4-1/4 [108] 2-1/8 Resilient Mounting 5-1/2 [53] Optional Gromment with 3/8 [10] [141] Rear/Bottom Return Service Dia. Holes (Typ. of 4) Max. [25] Switch Unit Label and Wiring Rear Mtg. Holes See Notes e,g,h Diagram 2-3/4 (See Note f) 4-1/8 [71] [106] 5-1/2...
  • Page 17 Unit Label and Wiring Diagram Rear/Bottom Return [151] (See Note f ) Resilient Mounting 4-1/4 Rear Mtg. Holes Grommet with 3/8 [10] [108] FIlter Removal Both Sides Dia. Holes (Typ. of 4) 2-1/8 Optional Service [53] Switch See Note e 7/8 [22] [25] O.D.
  • Page 18 4-1/4 [108] Rear/Bottom Return 2-1/8 7-7/8 Resilient Mounting [53] [199] Grommet with 3/8 [10] Rear Mtg. Holes Dia. Holes (Typ. of 4) Unit Label and Wiring Diagram 4-1/8 (See Note f) [108] Optional Service Strip Heater Switch High Limit See Notes e,g,h 19.13 Electric Strip [486]...
  • Page 19 Resilient Mounting 6-1/4 Grommet with 3/8 [10] [160] Unit Label and Dia. Holes (Typ of 4) Rear/Bottom Return Max. Wiring Diagram Strip Heater High Limit (See Note f) 4-1/4 Rear Mtg. Holes [108] Electric Strip Filter Removal Heater Element (Both Sides) 2-1/8 Optional Service [53]...
  • Page 20 10-5/8 4-5/8 [271] [119] [25] Max. Rear Duct Width 10-1/4 Unit Label and Wiring [260] Diagram (Size 06-12) (See Note f) 1-1/2 [38] Knockout Optional (Typ. of 6) Optional "L" Shaped Service [229] Switch Drip Lip. Shipped (Size 02-04) 7/8 [22] Knockout Loose (See Note d) (Typ.
  • Page 21 4-5/8 10-5/8 [25] [118] Rear Duct Width [271] Unit Label and Wiring Diagram Optional (See Note f) 10-1/4 [260] 1-1/2 [38] Knockout Service (Size 06-12) Strip Heater (Typ. of 6) Switch High Limit 9 [229] 10-1/4 20-3/4 Electric Strip (Size 02-04) [261] [527] Heater Element...
  • Page 22 4-7/8 [25] [123] 10-5/8 Max. Rear Duct Width [271] Unit Label and Wiring Diagram (See Note f) Optional 10-1/4 [260] Service (Size 06-12) 9-1/4 Switch 1-1/2 [38] Knockout 9 [229] [236] Optional “L” Shaped (Typ. of 6) (Size 02-04) Drip Lip, Shipped Loose (See Note d) See Note Chilled Supply and Return...
  • Page 23 4-5/8 10-5/8 [25] Rear Duct Width [117] [271] Unit Label and 10-1/4 [260] Wiring Diagram (Size 06-12) (See Note f) Optional 9 [229] 1-1/2 [38] Knockout Strip Heater Service 10-3/8 (Size 02-04) (Typ. of 6) High Limit Switch [262] Electric Strip Max.
  • Page 24 Optional Stamped Return Air Grille and 1" [25] Filter 9-3/8 4-7/8 [237] 3-1/2 [125] [89] Max. 10.220 Optional [259.59] Service Unit Label and (Size 06-12) Switch Wiring Diagram 1-1/2 [38] (See Note f) [229] Knockout 9-1/4 (Size 02-04) (Typ. of 8) [236] 7/8 [22] Knockout 18-3/8...
  • Page 25 Unit Label and Optional Wiring Diagram Stamped Return (See Note f) 9-5/16 Air Grille and 4-7/8 3-1/2 [237] 1" [25] Grille [122] [89] 10-1/4 Strip Heater Optional [260] High Limit (Size 06-12) Service 1-1/2 [38] Knockout Switch Electric Strip [229] (Typ.
  • Page 26 Unit Label and Wiring Diagram (See Note f) [126] Max. 10-1/4 Optional [260] Service (Size 06-12) 1-1/2 [38] Knockout Switch 9-1/4 (Typ. of 6) [229] [236] (Size 02-04) Max. Optional "L" Shaped 7/8 [22] knockout Drip Lip, Shipped Loose (Typ. of 2) 33-7/8 (See Note d) [860]...
  • Page 27 Unit Label and 7-3/8 Wiring Diagram Optional Stamped Optional [187] (See Note f) Return Air Grille Service Max. 10-1/4 and 1" [25] Filter Switch 1-1/2 [38] [260] Knockout (Size 06-12) (Typ. of 5) Strip Heater [229] High Limit 9-1/4 (See 02-04) [236] Electric Strip Max.
  • Page 28 Extended 42CA/42CE (B) 42CE with Valve Package (D) Standard 42CA/42CE 42CE with Same Side Piping and Controls with Valve Package (E) Standard 42CK/42CG 2-1/4 [57] [22] 15/16 9/16 [24] [14] Optional 5/8 [16] Secondary Drain [22] Connection O.D. Condensate Drain NOTE: Drain and optional secondary drain location are on drain pan.
  • Page 29 Top View PARTIAL REAR VIEW OF 42CK/CG UNITS Without Combo Valve 2 Pipe Heating/Cooling 4 Pipe Heating/Cooling 0 [0] 1-3/4 [44] 2-3/8 [59] 3-3/8 [86] 3-3/4 [95] Individual Components With Combo Valve 0 [0] Water KO's 3-3/8 [86] 3-3/4 [995] 1.500 x 2 4 [100] [38.1]...
  • Page 30 NOTE: Field piping and insulation required inside the cabinet up to the isolation valve connection. Air Vent Isolation Valve Circuit Setter/Flow Control Valve Body with Acuator LEGEND Drain Tube CR — Cold Water Return CS — Cold Water Supply HR — Hot Water Return PT Port HS —...
  • Page 31 4 Pipe Heating/Cooling 2 Pipe Heating/Cooling Referenced from front Referenced from rear mounting hole mounting hole 0 [0] 0.000 [0] 3-5/8 [92] 3-5/8 [92] 5-3/8 [138] Standard Valve Package 5-3/8 [138] 7-1/8 [179] 10-1/4 [261] 0 [0] 0 [0] 3-5/8 [92] 3-1/2 [88] 5-3/8 [138] 5-1/8 [132]...
  • Page 32 [126] 9-1/4 Optional [236] Extended Drain Pan (See Note d) 26-3/4 Optional 5/8 [16] O.D. [679] Tell-Tale Drain Connection 9 [230] (Available on standard and extended drain pans.) 1-7/8 [21] 7/8 [22] O.D. [47] Condensate [78] Resilient Mount Grommet Drain 4-1/2 4-1/2 with 3/8 [10] Dia.
  • Page 33 7-3/8 [188] 9-1/4 Optional [236] Extended Drain Pan (See Note d) 26-3/4 Optional 5/8 [16] O.D. [679] Tell-Tale Drain Connection 9 [230] (Available on standard and extended drain pans.) Optional Extended 1-7/8 Drain Pan [21] 7/8 [22] O.D. [47] 3 [78] (See Note 8) Condensate Resilient Mount Grommet...
  • Page 34 Optional Extended 5-5/8 Drain Pan [143] Optional 5/8 [16] O.D. Rear Mtd Holes Filter Removal [19] Tell-Tale Drain Connection (Both Sides) (Available on standard and extended drain pans.) 9-1/4 [236] 7/8 [22] O.D. 31-1/8 26-1/4 Condensate [789] [666] Drain 3-1/4 [22] [81] Drain Pan (Abbreviated View)
  • Page 35 Filter Removal Rear Mtd Holes [19] (Both Sides) Optional Extended Drain Pan 9-1/4 [236] Optional 5/8 [16] O.D. 31-1/8 Tell-Tale Drain Connection 26-1/4 [789] (Available on standard and [666] [204] extended drain pans.) 7/8 [22] O.D. Condensate 3-1/4 [22] Drain [81] Resilient Mount Grommet 4-1/2...
  • Page 36 Optional Rear Mounted Holes Extended [152] [19] Drain Pan Optional 5/8 [16] O.D. 9-1/4 Tell-Tale Drain Connection [236] (Available on standard and 28-5/8 26-1/4 extended drain pans.) [727] [666] 7/8 [22] O.D. Condensate Drain 1-7/8 3-1/8 [21] [47] [79] Resilient Mount Grommet 4-1/2 4-1/2 [114]...
  • Page 37 Optional Extended Rear Mtd Holes Drain Pan [19] Optional 5/8 [16] O.D. Tell-Tale Drain Connection 9-1/4 (Available on standard and [236] extended drain pans.) 28-5/8 26-1/4 [727] [666] [204] 7/8 [22] O.D. Condensate Drain 3-1/8 [21] 1-7/8 A’ [47] [79] Resilient Mount Grommet 4-1/2 4-1/2...
  • Page 38 1/2 x 2 [13 x 5] 6-1/8 [156] Mtg. Slot Typical Control Box (See Notes e,h) 9-1/4 Optional Angle [236] Drip Lip 0 [0] (Shipped Loose) 2-5/16 [59] 34 [864] 4 [102] Chilled/Hot Mtg Slot Detail 6 [153] Water Supply Optional Service 9-1/16 [231] and Return...
  • Page 39 1/2 x 2 [13 x 5] Mtg. Slot Typical Control Box 0 [0] (See Notes e,h) 2-5/16 [59] 9-1/4 4 [102] Optional Angle [236] 6 [153] Drip Lip 9-1/16 [231] (Shipped Loose) 11-9/16 [294] [965] Mtg Slot Detail 14-1/8 [359] Chilled/Hot Water Supply 16-11/16 [424]...
  • Page 40 Mtg Slot Detail 1/2 x 2 [13 x 5] 8 [204] [204] Mtg. Slot Typical 5 [126] Control Box (See Notes e,h) 7/8 [22] Dia. KO x 2 0 [0] Ref 2-5/16 [59] Ref 4 [102] Ref Optional Angle 6 [153] Ref 10-1/4 Drip Lip [261]...
  • Page 41 8 [204] 8 [204] 1/2 x 2 [13 x 5] Mtg. Slot Typical 5 [126] Mtg Slot Detail Control Box (See Notes e,h) 7/8 [22] Dia. KO x 2 0 [0] Ref 10-1/4 2-5/16 [59] Ref [261] [864] 4 [102] Ref Optional Angle 6 [153] Ref Drip Lip...
  • Page 42 5-1/2 [140] 5-5/8 [142] 18-1/8 [461] 9-3/8 [238] Top View 15-3/8 1-3/4 [43] [389] 3-7/8 [98] 3-7/8 [98] Supply 1 [24] 1 [25] Return Chilled/Hot Duct Collar Water Supply and Return 1 [25] Filter Connection 7/8 [22] O.D. 33-1/8 Control Box Condensate Drain [840] (See Notes e,h)
  • Page 43 a42-4120 [203] 5-5/8 [142] 18-1/8 [461] 9-3/8 [238] Top View 15-3/8 1-3/4 [389] [43] 3-7/8 3-7/8 Supply [98] [98] 1 [24] 1 [25] Return Chilled/Hot Duct Collar Water Supply and Return Electric Strip Connection 1 [25] Filter Heater Element 7/8 [22] O.D. 33-1/8 Control Box Condensate Drain...
  • Page 44 Control Box 6-3/8 6-1/2 (See Note d,f,g). [162] [162] 5/8 [16] OD Supply and Return 9-1/4 Water Connections Plastic auxilary 7x7 [236] drain pan with 3/4 [19] Side box for MPT connection. EH option Optional Service Switch 3-5/8 3-5/8 [92] [92] 2-1/2 [64]...
  • Page 45 ITEM DESCRIPTION Coil Assembly Drain Trough Assembly Control Box Bracket Guard Control Package Top Coil Baffle Assembly Top Panel Assembly Ducted Base Plate Front Panel Assembly Heater Assembly Filter Channel Filter Auxiliary Drain Pan Chassis Assembly Motor Blower Deck Assembly Fig.
  • Page 46 6-1/2 Control Box 6-3/8 [165] (See Note d,f,g). [162] 5/8 [16] OD Plastic auxilary 7x7 9-1/4 Supply and Return Drain pan with [236] Water Connections 3/4 [19] MPT connection. Side box for EH option. Optional Service 1 [25] Supply Switch Duct Collar 3-5/8 3-5/8...
  • Page 47 ITEM DESCRIPTION Coil Assembly Drain Trough Assembly Control Box Bracket Guard Control Package Top Coil Baffle Assembly Top Panel Assembly Ducted Base Plate Front Panel Assembly Heater Assembly Filter Channel Filter Auxiliary Drain Pan Chassis Assembly Motor Blower Deck Assembly Fig.
  • Page 48 Control Box Supply Air (See Note d,f,g). Opening 3-3/4 Typ. 2 5/8 [16] OD [126] [95] Supply and Return Optional Service Water Connection Switch Plastic auxilary 7x7 Control Access Door drain pan with 3/4 [19] Typ. 2 MPT connection. (Options Available) 2-1/2 Filter Retainer [63]...
  • Page 49 ITEM DESCRIPTION Coil Assembly Drain Trough Assembly Outer Case Leg Top Panel Assembly Subbase Right Hand Subbase Left Hand Control Box Bracket Top Coil Baffle Assembly Base Plate Front Panel Assembly Solid Heater Assembly Filter Channel Filter Auxiliary Drain Pan Chassis Assembly Motor Blower Deck Assembly Control Package...
  • Page 50 Control Box (See Note d,f,g). 5/8 [16] OD Supply and Return Water Connections Optional Service Switch Plastic auxilary 7x7 drain pan with 3/4 [19] MPT connection. Top View 2-1/2 Filter Retainer [63] Clips Unit Label and Front View Wiring Diagram (See Note e).
  • Page 51 ITEM DESCRIPTION Coil Assembly Drain Trough Assembly Outer Case Leg Top Panel Assembly Subbase Right Hand Subbase Left Hand Control Box Bracket Top Coil Baffle Assembly Base Plate Front Panel Assembly Solid Heater Assembly Filter Channel Filter Auxiliary Drain Pan Chassis Assembly Motor Blower Deck Assembly Control Package...
  • Page 52 Supply Air Opening 5 [126] 5 [126] Control Box (See Note f and g). 5/8 [16] OD Supply and Return Water Connections Optional Service Plastic auxilary Switch drain pan with 3/4 [19] MPT connection. 2-1/2 [63] Filter Retainer Top View (Dimensions from Clips Unit Label and...
  • Page 53 ITEM DESCRIPTION Coil Assembly Drain Trough Assembly Outer Case Leg Top Panel Assembly Subbase Right Hand Subbase Left Hand Control Package Bracket Control Package Top Coil Baffle Assembly Wrapper Extension Assembly Base Plate Front Panel Assembly Heater Assembly Filter Channel Filter Auxiliary Drain Pan Chassis Assembly...
  • Page 54 Control Box 5/8 [16] OD (See Note f and g). Supply and Return Water Connections Optional Service Switch Plastic auxilary drain pan with 3/4 [19] MPT connection. Top View 2-1/2 [65] Front View (Dimensions from Unit Label and inside case leg). (Without Access Panel) Wiring Diagram 5 [126]...
  • Page 55 ITEM DESCRIPTION Coil Assembly Drain Trough Assembly Outer Case Leg Top Panel Assembly Subbase Right Hand Subbase Left Hand Control Package Bracket Control Package Top Coil Baffle Assembly Wrapper Extension Assembly Base Plate Front Panel Assembly Heater Assembly Filter Channel Filter Auxiliary Drain Pan Chassis Assembly...
  • Page 56 Control Box [153] (See Note f and g). 5/8 [16] OD Supply and Return Water Connections Optional Service Switch Top View 2-7/8 Plastic auxilary Front View [67] drain pan with 3/4 [19] MPT connection. (Without Access Panel) Unit Label and Wiring Diagram (See Note e).
  • Page 57 8-3/4 [219] Control Box (See Note f and g). 5/8 [16] OD Supply and Return Water Connections Top View Optional Service Plastic auxilary Switch drain pan with 3/4 [19] MPT connection. Front View Unit Label and Wiring Diagram (Without Access Panel) (See Note e).
  • Page 58 Control Access Door (2) 3-1/4 3-1/4 (Options Available) Control Box [82] [82] 5/8 [16] OD (See Note f and g). Supply and Return Water Connections Plastic auxilary Optional Service drain pan with 3/4 [19] Switch MPT connection. Unit Label and Front View Wiring Diagram [126]...
  • Page 59 Control Access Door (2) (Options Available) 3-1/4 3-1/4 Control Box [82] [82] (See Note f and g). 5/8 [16] OD Supply and Return Water Connections Optional Service Switch Plastic auxilary drain pan with 3/4 [19] [126] [126] Unit Label and Front View MPT connection.
  • Page 60 [22] [22] [22] [22] Top View Top View (Extended Model) (Standard Model) Air Vent [25] [25] [19] [25] 5/8" [16] O.D. Supply Supply and Return Water Stamped Connections Supply Grille [127] [127] 23-1/2 Removable 23-1/2 [597] Front Panel [597] Stamped Return [559] Grille With 1"...
  • Page 61 LEGEND Front Rear — Hot Water Return — Hot Water Supply — Cold Water Return — Cold Water Supply — Right Hand — Left Hand 0” 42V*D Hydronic Cooling and Heating Coil Dimensions a,b,c,d COIL ROW CIRCUITS UNIT NOTES SIZE COOL HEAT COOL...
  • Page 62 42V*D Hydronic Cooling and Heating Coil Dimensions (cont) a,b,c,d COIL ROW CIRCUITS UNIT NOTES SIZE COOL HEAT COOL HEAT — — — 21-1/3 15-6/7 — 4-1/6 — 7-1/5 — — — — 19-1/8 — 4-1/9 — — — — — 19-1/8 —...
  • Page 63 LEGEND — Hot Water Return — Hot Water Supply — Cold Water Return — Cold Water Supply — Right Hand — Left Hand Bottom Back 42VCA/VEA Hydronic Cooling and Heating Coil Dimensions a,b,c,d COIL ROWS CIRCUITS VCA, VEA (1-3 ROWS) UNIT NOTES SIZE...

  • Page 64: Installation

    INSTALLATION Step 1 — Horizontal Ceiling and Hi-Performance Ceiling Unit Installation Anchoring the equipment in place is accomplished by using the mounting points provided with 3/8 in. allthread rod and other hardware (not supplied with unit). The unit must be positioned so that the coil is on a LEVEL PLANE.

  • Page 65: 42D Units

    Fig. 61 — Right-Hand Extension Drip Lip NOTE: Threaded rods and hardware are provided by others. DC unit shown. Fig. 64 — Thread Rod Suspension (42DC/DE Units) SUSPENSION MOUNTING Hanger Rails Mount Cabinet unit models 42DE and 42DF may be suspended using the neoprene grommets provided.

  • Page 66: 42V Units

    42V UNITS Vertical Series Unit Installation (42VAD) Vertical unit models are designed to be floor mounted or otherwise supported from below and bolted to the wall or floor structure through the mounting holes provided in the chassis. These units may be wall hung only when originally ordered from the factory for wall-mount applications.

  • Page 67: Decorative Wall Panels Installation (42Vad)

    Decorative Wall Panels Installation (42VAD) The 42VAD model is a fully recessed and built into the wall of the conditioned areas. They cover the recess opening on all sides and are easily removed for access to the unit. NOTE: For Style W and Z wall panels, once the wall panel frame is secured to the wall, install the panel and secure to the frame with the factory provided quarter turn camlocks.

  • Page 68: Optional Trim Kit Installation (42Vbd/Vfd Units)

    Optional Trim Kit Installation (42VBD/VFD Units) An optional trim kit can be applied to partially recessed 42VBD, VFD units in the wall. The trim kit can also be applied to cover rough opening to eliminate the need for finish work such as carpentry, drywall, painting, etc.

  • Page 69: Step 3 - Make Piping Connections

    Step 3 — Make Piping Connections Access to piping is available through the access panels at the side of the units or front of the unit. Qualified personnel in accordance with local and national codes must perform all piping connections. Refer to Tables 1-3 for piping connections.

  • Page 70: Valve Package Installation

    General Assembly For 42CG and 42CK units, factory provides tube extensions Unit NOTE: Field trim to penetrate the rear of the fan coil cabinet. Chilled and hot Wall Drain Pan “P” trap as required extension tubes must be properly insulated. See Fig. 78. to prevent kinking.

  • Page 71: Steam Connections

    NOTE: If a hot water coil is used in the reheat position, a field- leakage from shipping damage or mishandling. If leaks are found, supplied freezestat must be installed to protect the coil. notify your Carrier representative before initiating any repairs. Re- General Assembly lease trapped air from system.
  • Page 72 Table 7 — Piping Components FACTOR RATING STEAM SYMBOL/SKETCH DESCRIPTION MANUAL AIR VENT: Threaded brass needle valve with screwdriver slot for adjustment. Application — Body brazed into high point of heating and cooling coils for bleeding air from coil. Standard item on all hydronic coils.
  • Page 73 Table 7 — Piping Components (cont) FACTOR RATING STEAM SYMBOL/SKETCH DESCRIPTION BALANCE VALVE: Variable water flow manual balancing valve with screwdriver slot adjustment screw. Application — May be used in 3-way valve bypass line to permit equal flow balancing. Valve orifice size determines C factor.
  • Page 74 Table 7 — Piping Components (cont) FACTOR RATING STEAM SYMBOL/SKETCH DESCRIPTION 2-WAY MOTORIZED VALVE (25 psi close off differential pressure): Electric 2-position flow control valve (open/ closed). Normally closed body with manual override lever. Installed in supply line to unit. Application —...
  • Page 75 Table 7 — Piping Components (cont) FACTOR RATING STEAM SYMBOL/SKETCH DESCRIPTION MODULATING VALVE (Optional) (Non-Spring Return, Floating Point Actuator): Modulating valves are designed to control the flow in the circuit by making incremental adjustments to the flow path within the valve. Application —...

  • Page 76: Step 4 - Make Electrical Connections

    Step 4 — Make Electrical Connections The electrical service to the unit should be compared to the unit nameplate to verify compatibility. The routing and sizing of all piping, and the type and sizing of all wiring and other electrical components such as circuit breakers, disconnect switches, etc.

  • Page 77: Step 5 - Make Ductwork Connections

    Step 5 — Make Ductwork Connections All ductwork and/or supply and return grilles should be installed in accordance with the project plans and specifications. If not in- cluded on the unit or furnished from the factory, supply and return grilles should be provided as recommended in the product catalog. For units with no return-air ductwork, check local code require- ments for possible application restrictions.

  • Page 78: Step 6 - Frame And Finish Unit

    Step 6 — Frame and Finish Unit Verify drain line is properly and securely positioned and that the line is clear. Pour water into drain to check operation. EXPOSED UNIT FINISH, TOUCH-UP AND REPAINT Return access and exposed cabinet units may be furnished with a START-UP baked enamel finish.

  • Page 79: Direct Expansion (Dx) Systems

    Anti-freeze solutions may also be used to lower the freezing point. tem with its own operating characteristics. For this reason, air Carrier water coil tubes and headers are constructed of pure balancing is normally done by balance specialists who are famil- copper.

  • Page 80: Board Components And Specifications

    Board Components and Specifications Be sure electrical service switch is open, locked, and tagged while working on unit. Before proper control operation can be verified, all other systems Remove return-air grille access panel and brush between must be operating properly. The correct water and air temperatures coil fins with stiff wire brush.

  • Page 81: Electrical Wiring And Controls

    Filters, Permanent A maintenance schedule for permanent filters should be devel- oped in the same manner as throwaway filters. Unlike throwaway filters, permanent filters may be cleaned and re-installed in the unit instead of being discarded when dirty. The optional factory permanent filter may be cleaned in hot soapy water to remove any trapped dirt.
  • Page 82 APPENDIX A — CONTROLS OPERATION Changeover/Return Air Sensor (CN2) Remote Shutdown Input (CN3) Pluggable T-Stat Connector (CN1) LED Indication(s) ECM Fan Speed Adjustment ECM Connection (CN10) Two-Stage Cooling (CN5) Actuator & Aquastat (CN6) PSC Motor Connection (CN9) Transformer (CN7) Line Service Voltage (CN8) CN1 –...
  • Page 83 CN1 - 24V CUSTOMER INPUT (THERMOSTAT) Use proper wire gauge and insulation type based on application and local code requirements. For detailed Carrier 24V thermostat control wiring diagrams, ref- erence thermostat Installation Instructions. Refer to Table A and Fig. A-B.
  • Page 84 Power connector for 24V or Common-powered sensors CN6 - 1ST STAGE COOLING/HEATING a. 24V powered sensors: Applicable for Carrier-supplied air sensor, Programma- 24V On/Off, 24V Floating, 0-10V Proportional control, Line ble, Non-programmable 24V Carrier thermostats. voltage b. Common-powered sensors:...
  • Page 85 If a factory provided thermostat or DDC controller is utilized, then the unit is already correctly configured. Carrier recommends using the specified thermostat or DDC con- troller to commission the unit whenever possible. However, the blower can be started and operated without the thermostat. Con- sult factory for further instruction.
  • Page 86 APPENDIX A — CONTROLS OPERATION (CONT) LED Function and Outcomes Refer to Table B and Fig. H for functions and commands. Fig. H — LED Functions Table B — LED Function and Outcomes (Sequence of Operation) ITEM DESCRIPTION OUTCOME OVF LED Shows Red Motor OFF Condensate Overflow Condensate switch is tripped by increasing water level in the drain pan.
  • Page 87 APPENDIX A — CONTROLS OPERATION (CONT) NOTE: Wiring diagram also available through QR code found on the unit serialized name plate label. Fig. I — Typical Wiring Diagram...
  • Page 88 Failure to follow safety rules could result in electrical shock or hazard. Unit must be powered to perform the following procedure. If main power is not available, Carrier recommends connecting a temporary 24V-40VA power supply in parallel with the sec- ondary outputs of the unit's transformer.
  • Page 89 APPENDIX C — 42CE/42DC RETURN MODIFICATION Below are the procedures for converting furred-in ceiling model Install filter. fan coils with factory-installed plenum's from rear return to bot- tom return. Precautions Use eye, ear, and hand safety gear prior to handling sheet metal or modifying any fan coil units.
  • Page 90 APPENDIX C — 42CE/42DC RETURN MODIFICATION (cont) Remove duct collar assembly. Install duct collar assembly. Slide the filter in the duct collar opening and install filter bracket. Remove access panel. Install access panel on the rear of the unit. Conversion is complete. NOTE: To convert a Bottom Return unit to Rear Return, follow the same process in reverse.
  • Page 91 APPENDIX D — PIPING AND VALVE CONNECTIONS NOTE: Chilled water piping determines the hand of the unit. NOTE: Chilled water piping determines the hand of the unit. SAME END CONNECTION OPPOSITE END CONNECTION Valve Packages For 2-Pipe Systems — Valve packages for standard 2-pipe units are piped for same end connection (L.H.
  • Page 92 APPENDIX D — PIPING AND VALVE CONNECTIONS (CONT) HYDRONIC COIL ARRANGEMENT FIELD PIPING CONNECTIONS* VERTICAL FLOOR UNITS — 42VB, VE, VF Pipe into cabinet end compartment (opening in bottom and back). VERTICAL FLOOR UNITS — 42VA, VC Pipe to external connections (no cabinet). CEILING UNITS (EXPOSED) —...
  • Page 93 APPENDIX D — PIPING AND VALVE CONNECTIONS (CONT) Fixed Flow Valve Union Pressure Ball Valve Test Port w/ Mem. Stop Circuit Setter AIR VENT Swage Insertion Test Port Balance Control COILS Valve Drain Strainer Fixed Flow Swage Insertion Ball Valve (Alternate Test Port with Memory Stop...
  • Page 94 APPENDIX D — PIPING AND VALVE CONNECTIONS (CONT) The 2-way motorized valve motor drives valve open and a spring returns valve to normally closed position (no water flow with unit OFF). Supply connection at coil will be swage fit for field braze (standard) or union (option).
  • Page 95 APPENDIX D — PIPING AND VALVE CONNECTIONS (CONT) On the 3-way motorized valve, flow is normally closed to coil and open to system return. Motor closes bypass flow to system return while opening flow through coil. Water bypasses coil and flows directly to system return when unit is OFF.
  • Page 96 APPENDIX D — PIPING AND VALVE CONNECTIONS (CONT) When isolation valves only are specified, they will be brazed to the coil stub-outs. Check job specifications for system pressure, pressure drop limitations and flow rate prior to selecting specific com- ponents or valve package size (1/2 in., 3/4 in., etc.). WITH HAND VALVES ONLY 2-PIPE SYSTEM ONLY (One Valve Package) Application: BALL VALVE...
  • Page 98 © 2023 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420021-01 Printed in U.S.A. Form 42-8SI Pg 98 3-23 Replaces: 42-7SI...

  • Page 99: Start-Up Checklist For 42C,D,V Series Fan Coil Air Conditioners

    START-UP CHECKLIST FOR 42C,D,V SERIES FAN COIL AIR CONDITIONERS NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation, Start-Up, and Service Instructions document.
  • Page 100 © 2023 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420021-01 Printed in U.S.A. Form 42-8SI Pg CL-2 3-23 Replaces: 42-7SI...

This manual is also suitable for:

42d series42v series42c 02-1242d 06-2042dc 06-20

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