42C,D,S,V Series Fan Coil Air Conditioners Installation, Start-Up and Service Instructions CONTENTS SAFETY CONSIDERATIONS Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 PRE-INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39 Unpack and Inspect Units . . . . . . . . . . . . . . . . . . . . . . . .
Table 1 — Physical Data — 42C Series Units UNIT SIZE 42C NOMINAL AIRFLOW (cfm) SHIPPING WEIGHT (lb)* 42CA 42CE 42CF 42CG 42CK COIL WATER WEIGHT (Approx lb per row of coil) 42CA, CE, CG, CK 42CF COILS FPI Coil Face Area (sq ft)† MOTOR (qty) 42C Series BLOWER (qty) 42CA, CE, CG, CK 42CF FILTERS Nominal Size (in.) (1-in. thick) 42CA** 42CE†† 42CF††*** 42CG Bottom Return Rear Return 42CK Bottom Return Rear Return Rear Return with Duct Collar Qty SUPPLY DUCT COLLAR PIPING CONNECTIONS (Sweat) (in.
Table 3 — Physical Data — 42D Series Units UNIT SIZE 42D NOMINAL AIRFLOW (cfm) SHIPPING WEIGHT (lb)* 42DA 42DC 42DD 42DE 42DF COIL WATER WEIGHT (Approx lb per row of coil) COILS FPI Coil Face Area (sq ft) MOTOR (qty) BLOWER (qty) FILTERS Nominal Size (in.) (1-in.
1 2 3 4 5 6 — — — — — — 7 — 8 — 9 — 10 — UNIT SIZE 02 03 04 06 08 10 12 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Overall unit dimension increases by 4 in. with optional electric heat. 5. Not shown: 3-speed fan switch; wall plate, closed cell foam on main drain pan. 6.
1 — 2 — 3 — 4 — 5 — 6 — 7 — 8 — 9 — 10 — 11 — 12 — UNIT SIZE 02 03 04 06 08 10 12 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Overall unit dimension increases by 4 in. with optional electric heat. 5. Not shown: 3-speed fan switch; wall plate, closed cell foam on main drain pan. 6.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — 15 — UNIT SIZE 02 03 04 06 08 10 12 NOTES: 1. Right hand unit with standard 3-row coil shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Unit available with bottom or rear return air. 5. Dimension increases by 4 in. with optional electric heat. 6.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — 15 — 16 — 17 — UNIT SIZE 02 03 04 06 08 10 12 NOTES: 1. Right hand unit with standard 3-row coil shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Standard 3-row coil shown. 4. Unit available with bottom or rear return air. 5. Dimension increases by 4 in. with optional electric heat. 6.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — 15 — UNIT SIZE 04 06 08 10 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 04 thru 08 have one motor, 2 blowers; size 10 has 2 motors, 4 blowers. 3. Refer to above figure for configuration of filter and track if installed in optional plenum. 4. Dimension increases by 4 in. with optional electric heat. 5. Not shown: 3-speed fan switch; wall plate, 1/2-in.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — 15 — 16 — UNIT SIZE 04 06 08 10 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 04 thru 08 have one motor, 2 blowers; size 10 has 2 motors, 4 blowers. 3. Refer to above figure for configuration of filter and track if installed in optional plenum. 4. Dimension increases by 4 in. with optional electric heat. 5. Not shown: 3-speed fan switch; wall plate, 1/2-in.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — 15 — UNIT SIZE 02 03 04 06 08 10 12 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Cabinet has an Arctic White baked finish. 4. Refer to supply and return connections above for coil stub-out locations. 5.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — 15 — 16 — UNIT SIZE 02 03 04 06 08 10 12 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ±5/8-in. 2. Unit sizes 02 and 03 have one motor, one blower; sizes 04 through 08 have one motor, 2 blowers; sizes 10 and 12 have 2 motors, 4 blowers. 3. Cabinet has an Arctic White baked finish. 4. Refer to supply and return connections above for coil stub-out locations. 5.
NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ±1/4 in. 4. Bottom panel is Arctic White polyester powder coat paint. UNIT SIZE 02 03 04 06 08 10 12 NOM AIRFLOW (Cfm) 200 300 400 600 800 1000 1200 A42-4149 DIMENSIONS (in.) QTY/UNIT A B C D E F Blower Motor BOTTOM RETURN FILTER SIZE, (in.
NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ±1/4 in. 4. Bottom panel is Arctic White polyester powder coat paint. UNIT SIZE 02 03 04 06 08 10 12 NOM AIRFLOW (Cfm) 200 300 400 600 800 1000 1200 a42-4150 DIMENSIONS (in.) QTY/UNIT A B C D E F Blower Motor BOTTOM RETURN FILTER SIZE, (in.
NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ±1/4 in. 4. Bottom panel is Arctic White polyester powder coat paint. UNIT SIZE 02 03 04 06 08 10 12 NOM AIRFLOW (Cfm) 200 300 400 600 800 1000 1200 a42-4151 DIMENSIONS (in.) QTY/UNIT A B C D E F Blower Motor REAR RETURN FILTER SIZE, (in.
NOTES: 1. Right hand unit shown; left hand unit opposite. 2. Internal factory valve package and drains may not align with cabinet knockouts. 3. Dimensions shown in inches (mm). All dimensions are ±1/4 in. 4. Bottom panel is Arctic White polyester powder coat paint. UNIT SIZE 02 03 04 06 08 10 12 NOM AIRFLOW (Cfm) 200 300 400 600 800 1000 1200 a42-4152 DIMENSIONS (in.) QTY/UNIT A B C D E F Blower Motor REAR RETURN FILTER SIZE, (in.
LEGEND 1 — Junction Box, 4 in. x 4 in. 2 — Optional Drip Lip, shipped loose 3 — Mounting Holes (4), Rubber Grommets have 3/8-in. Diameter Hole 4 — Piping KO, 11/2-in. Diameter 5 — Electrical KO, 7/8-in. Diameter 6 — Drain KO, 11/2-in. Diameter 7 — Supply Duct Collar 8 — Return Connection, 5/8-in. OD. 9 — Optional Rear Return. Consult factory for collar dimensions. 10 — Drain, 7/8-in. OD.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — 15 — 16 — 17 — LEGEND Junction Box, 4 in. x 4 in. Strip Heater High Limit Electric Strip Heater Element Optional Drip Lip, shipped loose Mounting Holes (4), Rubber Grommets have 3/8-in. Diameter Hole Piping KO, 11/2-in. Diameter Electrical KO, 7/8-in. Diameter Drain KO, 11/2-in. Diameter Supply Duct Collar Optional Rear Return. Consult factory for collar dimensions. Drain, 7/8-in. OD.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — UNIT SIZE 02 03 04 06 08 10 12 LEGEND Optional Unit Mounted Control Box Wall Mounting Holes (4), 3/4-in. Diameter Drain, 3/4-in. MPT Drain Pan, Auxiliary, Shipped Loose Supply Conn, 5/8-in. OD Return Conn, 5/8-in. OD Filter Air Vent, 1/8-in. MPT Discharge Opening Flexible Conduit Front Access Panel NOM AIRFLOW (Cfm) 200 300 400 600 800 1000 1200 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-in. 2.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — UNIT SIZE 02 03 04 06 08 10 12 LEGEND Standard Stamped Supply Grille Access Door, Fan Switch Supply Conn, 5/8-in. OD Return Conn, 5/8-in. OD Drain, 3/4-in. MPT Filter Air Vent, 1/8-in. MPT Front Panel Fastener Drain Pan, Auxiliary, Shipped Loose Wall Mounting Holes (4), 3/4-in. Diameter Flexible Conduit Fan Switch, 3-speed Front Access Panel NOM AIRFLOW (Cfm) 200 300 400 600 800 1000 1200 NOTES: 1. Right hand unit shown; left hand unit opposite.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — 12 — 13 — 14 — UNIT SIZE 02 03 04 06 08 10 12 LEGEND Standard Stamped Supply Grille Access Door, Fan Switch Supply Conn, 5/8-in. OD Return Conn, 5/8-in. OD Drain, 3/4-in. MPT Filter Air Vent, 1/8-in. MPT Front Panel Fastener Optional Valve Package (inside cabinet) Drain Pan, Auxiliary, Shipped Loose Wall Mounting Holes 3/4-in. Diameter Flexible Conduit Fan Switch, 3 speed Access Doors NOM AIRFLOW (Cfm) 200 300 400 600 800 1000 1200 NOTES: 1.
14-3/8 (368) 1 2 3 4 5 6 7 8 — — — — — — — — UNIT SIZE 02 03 04 06 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-in. 2. Unit sizes 02 through 04 have one motor, 2 blowers; size 06 has 2 motors, 4 blowers. 3. Standard 2-row coil shown. 4. Optional unit-mounted switch box and controls, when specified, are installed on opposite side from cooling connections. 5. Height increases by 2 in. with electric heat. 6. Not shown: 3-speed fan switch, 1/2-in.
1— 2— 3— 4— 5— 6— 7— 8— 9— LEGEND Unit-Mounted Control Box (Optional) Drain Pan, Auxiliary, Shipped Loose Air Vent, 1/8-in. MPT Supply Conn, 5/8-in. OD Drain, 3/4-in. MPT Return Conn, 5/8-in. OD Filter Electrical Sheath Heater Element Discharge Opening NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-in. 2. Unit sizes 02 through 04 have one motor, 2 blowers; size 06 has 2 motors, 4 blowers. 3. Standard 2-row coil shown. 4.
14-3/8 (368) LEGEND Fan Switch, 3-Speed, behind Access Door Front Panel Fastener Stamped Supply Grille Supply Conn, 5/8-in. OD Return Conn, 5/8-in. OD Stamped Return Grille Filter Air Vent, 1/8-in. MPT Optional Valve Package (inside cabinet) Drain Pan, Auxiliary, with 3/4-in. MPT Drain Connection 11 — Return Air Grille 1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — UNIT SIZE 02 03 04 06 NOM AIRFLOW (Cfm) 200 300 400 600 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-in.
NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-in. 2. Unit sizes 02 through 04 have one motor, 2 blowers; size 06 has 2 motors, 4 blowers. 3. Cabinet has an Arctic White baked finish. 4. Height increases by 2 in. with electric heat. 5. Standard 2-row coil shown. 6. Not shown: 1/2-in. fiberglass insulation on inside of casing, closed cell foam on main drain pan. 7. For optional coil connections, view 42VC-203-1 using the Fan Coil Builder. 8.
1— 2— 3— 4— 5— 6— 7— 8— 9— 10 — 11 — LEGEND Supply Conn, 5/8-in. OD Air Vent, 1/8-in. MPT Filter Return Air Grille, Stamped Stamped Supply Grille Return Conn, 5/8-in. OD Removable Front Panel Drain Conn, 7/8-in. OD Auxiliary Drain Pan Valve Compartment Junction Box UNIT SIZE 01 03 NOM AIRFLOW (Cfm) 150 300 NOTES: 1. Right hand unit shown; left hand unit opposite. Coil connection locations are ± 5/8-in. 2. Front panel has an Arctic White baked finish. 3. Standard 2-row coil shown. 4.
UNIT SIZE 06 08 10 12 14 16 18 20 NOM AIRFLOW (cfm) 600 800 1000 1200 1400 1600 1800 2000 DIMENSIONS (in. ± 1/8) QTY/UNIT A A’ B D’ E H Blower Motor UNIT WEIGHT* (lb) 23 28 32 37 42 47 52 56 32 37 42 47 52 56 62 66 14 19 23 28 33 38 43 47 131/2 131/2 141/2 141/2 141/2 131/2 141/2 141/2 17 22 26 31 36 41 46 50 181/2 231/2 271/2 321/2 371/2 421/2 471/2 511/2 1 1 1 2 2 2 2 2 1 1 1 2 2 2 2 2 64 79 90 108 119 124 141 151 *Unit weights are based on dry coils and minimum rows.
UNIT SIZE 06 08 10 12 14 16 18 20 NOM AIRFLOW (cfm) 600 800 1000 1200 1400 1600 1800 2000 DIMENSIONS (in.
SEE NOTE 8 UNIT SIZE 06 08 10 12 14 16 18 20 NOM AIRFLOW (cfm) 600 800 1000 1200 1400 1600 1800 2000 DIMENSIONS (in. ± 1/8) QTY/UNIT A B C Blower Motor 23 28 32 37 42 47 52 56 21 26 30 35 40 45 50 54 15 20 24 29 34 39 44 48 1 1 1 2 2 2 2 2 1 1 1 2 2 2 2 2 UNIT WEIGHT* (lb) 135 145 155 180 190 200 215 230 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1. Right hand unit shown; left hand unit opposite.
UNIT SIZE 06 08 10 12 14 16 18 20 NOM AIRFLOW (cfm) 600 800 1000 1200 1400 1600 1800 2000 DIMENSIONS (in. ± 1/8) QTY/UNIT A B C D 31 36 40 45 50 55 60 64 15 20 24 29 34 39 44 48 15 20 24 29 34 39 44 48 26 31 35 40 45 50 55 59 Blower Motor 1 1 1 2 2 2 2 2 1 1 1 2 2 2 2 2 UNIT WEIGHT* (lb) 150 160 170 195 205 215 230 235 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1. Right hand unit shown; left hand unit opposite. 2.
UNIT SIZE 06 08 10 12 14 16 18 20 NOM AIRFLOW (cfm) 600 800 1000 1200 1400 1600 1800 2000 DIMENSIONS (in. ± 1/8) QTY/UNIT A B C D E Blower Motor 31 36 40 45 50 55 60 64 131/2 181/2 221/2 271/2 321/2 371/2 421/2 461/2 14 20 24 28 34 38 44 48 26 31 35 40 45 50 55 59 81/2 8 8 81/2 8 81/2 8 8 1 1 1 2 2 2 2 2 1 1 1 2 2 2 2 2 UNIT WEIGHT* (lb) 150 160 170 195 205 215 230 235 *Unit weights are based on dry coils and minimum rows. Weights exclude packaging, valves, and other components. NOTES: 1.
CR CS D HR HS R S — — — — — — — ITEM 1 2 3 4 5 6 7 LEGEND Cold Water Return Cold Water Supply Drain Hot Water Return Hot Water Supply Return Supply DESCRIPTION Electrical Knockouts 3-in. Expanded Section Strip Heater (Optional) Limit Switch**†† (Optional) 1/ -in. Isolation Ball Valves** 2 Flexible Drain Tube/P-Trap Coil 1/2-in. OD Copper Tube 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Filter, Throwaway, 1-in.
CR CS D HR HS R S — — — — — — — ITEM 1 LEGEND Cold Water Return Cold Water Supply Drain Hot Water Return Hot Water Supply Return Supply DESCRIPTION Full Riser Chase 2 3 4 5 6 Electrical Knockouts 3-in. Expansion Section Strip Heater (Optional) Limit Switch**†† (Optional) 1/ -in. Isolation Ball Valves** 2 7 8 9 Flexible Drain Tube/P-Trap Drain Pan Coil 1/2-in. OD Tube 10 11 12 13 14 Filter, Throwaway, 1-in.
CR — CS — D — HR — HS — R — S — ITEM 1 LEGEND Cold Water Return Cold Water Supply Drain Hot Water Return Hot Water Supply Return Supply DESCRIPTION Electrical Knockouts 2 Gypsum Board, 5/8-in. Type “X” 3 4 5 6 7 3-in. Expanded Section Strip Heater**(Optional) Limit Switch**†† (Optional) 1/ -in. Isolation Ball Valves** 2 Thermafiber Insulation Flexible Drain Tube/P-Trap Coil 1/2-in. OD Copper Tube 8 9 QTY 2 1 3/5 2 2 4/8 2 2 10 11 12 13 14 15 16 17 18 19 Filter, Throwaway, 1-in.
CR — CS — D — HR — HS — R — S — LEGEND Cold Water Return Cold Water Supply Drain Hot Water Return Hot Water Supply Return Supply *Drawing provided for reference only. Dimensions may vary with options ordered. QTY NOTES: 1. Units are fabricated of 18-gage galvanized steel with a 16-gage galvanized fan deck. 1 2. All risers are insulated with 1/2-in. closed cell insulation. 3-in. Expanded Section 3/5 3. Thermostats shipped loose for field connection. 4. Risers are piped to coil with valves as specified.
CR — CS — D — HR — HS — R — S — LEGEND Cold Water Return Cold Water Supply Drain Hot Water Return Hot Water Supply Return Supply ITEM DESCRIPTION 1 Electrical Knockouts 9 10 11 12 13 14 15 16 17 18 19 20 21 QTY 1 Strip Heater** (Optional) 1 Limit Switch**†† (Optional) 1 1/ -in. Isolation Ball Valves** 2/4 2 Coil Stub Outs 2/4 Shipping Brace 2/4 Flexible Drain Tube/P-Trap 1 Coil 1/2-in. OD Copper Tube 1 Filter, Throwaway, 1-in.
Item 1 2 3 Description Float Switch (Optional) Drain Pan Flexible Drain Tube/P-Trap 4 Drain Knockout (3 Sides) 5 6 7 8 Blower Riser Knockouts (3 Sides) 1/2 in. Flare Adaptor (SWT x 37.5) Coil, 1/2 in. OD Copper Tube 1 in. Throwaway Filter (Factory Installed) Manual Air Vent Return Air Opening Knockout (For Optional Thermostat Remote Mounting) Molex Connector for Field-Installed Thermostat Control Box Duct Collar Extension (1/2 in. Side, 1 in.
3 (76) 3-5/8 (92) HR HS D CR CS 3 (76) 3-5/8 (92) 1 1-1/4 (32) 2 1-1/4 (32) D 19 H C H 25 A F 5 (127) 18 17 24 5 16 15 88 (2235) 8 5 6 7 8 9 10 9 11 Limit Switch (Factory Installed) Strip Heater Blower Riser Knockouts (3 Sides) 1/2 in. Flare Adaptor (SWT x 37.5) Coil, 1/2 in. OD Copper Tube 1 in.
a42-4167 A PANEL DIMENSIONS (in.) PANEL NO. UNIT SIZE 03, 04 06, 08 10, 12 A 15.5 19.5 23.5 2 03, 04 06, 08 10, 12 15.5 19.5 23.5 3 03, 04 06, 08 10, 12 15.2 19.2 23.2 6 03, 04 06, 08 10, 12 15.5 19.5 23.5 7 03, 04 06, 08 10, 12 15.1 19.1 23.1 8 03, 04 06, 08 10, 12 15.5 19.5 23.5 10 03, 04 06, 08 10, 12 15.2 19.2 23.2 1 A A 61.1 55.3 55.5 NOTE: Dimensions in inches. PANEL NO. 3 PANEL NO. 2 PANEL NO. 1 A42-4173 a42-4169 A A A 61.1 A 60.4 52.5 PANEL NO.
PANEL AND FRAME DIMENSIONS (in.) PANEL NO. UNIT SIZE 03, 04 06, 08 10, 12 A 15.1 19.1 23.1 5 03, 04 06, 08 10, 12 15.1 19.1 23.1 9 03, 04 06, 08 10, 12 15.1 19.1 23.1 4 A42-4170 NOTE: Dimensions in inches. A42-4168 A A42-4161 A A 60.4 54.7 51.7 PANEL NO. 4 PANEL NO. 5 PANEL NO. 9 Fig.
7. Adjust 42VA, VB, VC, VE, VF units leveling legs so unit is level. Unit must be level for proper operation and condensate drainage. 8. Mounting unit: a. Use rods and fasteners to suspend the unit at the factory-provided mounting holes with rubber grommets on the top of the unit on 42VA, VB, VF units. Reach into unit and attach unit to the wall using the 0.375-in. mounting holes (4) in top panel; do not use any other locations.
42S UNITS — A factory tag is on top of each unit. Tag states riser tier number, floor, room number if furnished and supplyair arrangement. Check unit for any other labels that apply to installation. Remove unit from pallet and take directly to assigned space for installation. Great care must be taken to assure that no force or pressure be applied to the coil, risers or piping during handling. Never use the riser to lift the unit.
h. After all drywalling and painting is complete, install thermostats, supply air grilles and return air panels. 7. Attach unit risers: IMPORTANT: Chilled water and hot water risers should never be piped to drain down into the condensate riser. Extensive water damage can occur due to drain overflow. Drain chilled and hot water risers to a remote location away from the unit such as sink, room and floor drains. CAUTION 8. Anchor risers as required: a. Do not fasten risers rigidly within each unit.
VALVE PACKAGES — There are limitations on physical size of pneumatic valves, quantity and type of matching components, and required control interface. See Fig. 43. Consult factory before ordering any special valve package components that are not covered in this book. Valve packages are shipped with the units or in unit cartons. Valve packages include belled ends for field soldering to coil connections.
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) — 42CG, CK, DE, DF Pipe through knock-outs in rear of cabinet to coil and valve package connections. CEILING UNITS (CONCEALED) — 42CA, CE, CF, DA, DC Pipe to connections extending from end of unit.
Coil Connections (Positions A & B) — When isolation valve only is added to supply or return line, the isolation valve will be factory brazed to the coil stub-out. Addition of any other component or connection to the supply or return line will change the respective coil connection(s). Service Fittings (Positions C & D) — Optional fittings for attaching pressure/temperature sensing devices to obtain pressure drop or temperature differential across coil.
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). Return connection at coil will be factory brazed if isolation valve only. Addition of any other component will require swage fit for field braze or optional union connection.
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. The aquastat (A) clips on supply line upstream from 3-way valve (as shown above). It senses system water temperature to prevent cooling operation with hot water in system piping or heating operation with chilled water in system piping.
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 components or valve package size (1/2 in., 3/4 in., etc.). 2-PIPE SYSTEM ONLY (One Valve Package) Application: • 2 Pipe - Hydronic Heating Only • 2 Pipe - Hydronic Cooling Only NOTES: 1. Continuous water flow, chilled water or hot water. 2. Not recommended for high humidity applications. 3.
NOTE: The project specifications for system pressure, pressure drop limitations, and flow rate should be checked prior to selection of specific components or the valve package size. 42C,D,V STEAM CONNECTIONS — On units with steam heating coils, the maximum steam pressure applied to the unit should never exceed 10 psig. However, when steam is used on a 4-pipe application system with 1-row and 2-row coils the maximum steam pressure should never exceed 5 psig (suitable for only low pressure steam).
Table 5 — Piping Components SYMBOL/SKETCH CV FACTOR 3/ in. in. 4 RATING* PSI F 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 (not used on steam or DX coils). Should not be used in lieu of main system air vents.
Table 5 — Piping Components (cont) SYMBOL/SKETCH FLOW CV FACTOR DESCRIPTION 1/ 2 in. 3/ 4 in. RATING* PSI F STEAM USE PRESSURE TEST PORT: Brass body 1/4 in. service access fitting with removable depressor type core. Application — Installed on both sides of the coil to allow for pressure sensing. Attach pressure gages to facilitate close tolerance water balancing. N/A N/A 400 210 NO GAGE COCK: Brass shut-off valve with 1/ in. FPT fitting for attachment of pressure 4 gages.
Table 5 — Piping Components (cont) SYMBOL/SKETCH CV FACTOR DESCRIPTION 1/ 2 in. 3/ 4 RATING* in. PSI F STEAM USE STRAINER: Y-type body with 50 mesh stainless steel screen. Application — Used for removal of small particles from system water during normal system operation. Should not be used in lieu of main system strainers. Strainer screen may have to be removed during initial high pressure system flushing during start-up.
Table 5 — Piping Components (cont) SYMBOL/SKETCH CV FACTOR DESCRIPTION 1/ 2-WAY MOTORIZED VALVE: Electric 2-position flow control valve (open/closed). Normally closed body with manual override lever. Installed in supply line to unit. Application — All standard control and valve packages are based upon normally closed valves (valve electrically powered open and closed by spring return when electric power removed).
IMPORTANT: THE ABOVE CHART IS FOR REFERENCE ONLY. Check all system component pressure ratings (coils, valves, pumps, etc.) and any applicable local or national piping codes prior to specifying system pressure rating. JOINT MATERIALS A 50-50 Lead-Tin at 200 F B 50-50 Lead-Tin at 150 F C 50-50 Lead-Tin at 100 F Note 1 D 95-5 Tin-Antimony at 200 F E 95-5 Tin-Antimony at 150 F F 95-5 Tin-Antimony at 100 F NOTES: 1. Not recommended for high system water pressures. 2.
Step 3 — Make Electrical Connections — Refer to unit nameplate for required supply voltage, fan and heater amperage and required circuit ampacity. Refer to unit wire diagram for unit and field wiring. Make sure all electrical connections are in accordance with unit wiring diagram and all applicable codes. The fan motor(s) should never be controlled by any wiring or device other than the factory-supplied switch or thermostat/ switch combination unless prior factory authorization is obtained.
Thermostatic Fan Control, 2-Pipe System with Safety Cycle — This control is used for high humidity situations in which condensate problems can occur if fan is turned off while chilled water is still running through the coil. The wiring provides fan cycling from HIGH to LOW on the cooling cycle and from LOW to OFF on the heating cycle. An ON-OFF toggle switch replaces the standard 3-speed fan switch. The toggle switch can be concealed to ensure that the unit runs on low speed when cooling.
120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING a42-4060 Fig.
a42-4059 Fig. 55 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Heating and Cooling with Automatic Changeover — Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor a42-4061 NEC CLASS 2 WIRING Fig.
Two control methods are available: 1. Use the standard automatic changeover thermostat with a dead band between heating and cooling. 2. Use a manual changeover thermostat. With this method only one changeover is required. Be sure to include a 2-way or 3-way electric valve with this system. NOTE: Wiring diagrams are for 120-v power supply. If other voltages for heaters or controls are specified, wiring may differ from that shown. See Fig. 57 and 58 for line voltage control. See Fig.
THERMOSTAT PART # 702893-36 PUR ORG REMOTE DEVICE BOX COOL BLU HEAT RED L1 BLK L2 OR N YEL HI W/ORG W/RED LOW W/BRN UNIT MOUNTED J BOX AQUASTATS QUICK CONNECT OPTIONAL BLOWER BRN L RED RED M BLU BLU BLK RED H BLK MOTOR RISE BLU PUR BLK BLK *WHT WHT COM *WHT EQUIPMENT GROUND RED RED BRN BLU RED BLK *WHT WHT RISE L2 or N VALVE L1 *WHT CONTACTOR LIMIT SWITCH 1 BLK BLK BLK *WHT L1 L2 OR N GRN ONLY 120V WHT/ALL OTHERS BLK Fig.
a42-4067 NEC CLASS 2 WIRING Fig. 60 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v) Normally, an automatic changeover thermostat with a dead band between heating and cooling is used, but a manual changeover thermostat is also suitable. A 2-way or 3-way valve must also be used so that the chilled water is off whenever the heater is on. No changeover device to sense water temperature is necessary.
a42-4073 120-V WHT ALL OTHERS BLK NEC CLASS 1 WIRING Fig. 61 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat — Unit-Mounted Thermostat (Line Voltage) Fig.
NOTE: Units may have 2 or 4 elements. Elements wired in parallel. a42-4072 Fig.
With this system, the fan runs continuously unless it is manually switched to OFF position. Fan must be on before thermostat can send signal to open the chilled water or hot water valve. NOTE: Wiring diagrams are for 120-v power supply. If other voltages for heaters or controls are specified, wiring may differ from that shown. See Fig. 65 and 66 for line voltage control. See Fig. 67 and 68 for 24-v control.
ONLY 120V WHT/ALL OTHERS BLK Fig. 66 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Thermostat (Line Voltage) a42-4078 Fig.
THERMOSTAT #33CSSN2-FC REMOTE DEVICE BOX RS+5 RS R G Y1 G3 W1 G2 C H2O CK1 NEC CLASS 2 WIRING YEL BLU BRN BLK PUR RED ORG VALVE BLK COOL BLK 2 Q/C 1 PUR YEL 33ZCRLYBRD VALVE BLK HEAT BLK 2 Q/C 1 BRN YEL G G2/(W) G3/(Y) COM QUICK CONNECT FAN BLK (VALVE) YEL RED BLU (COOL) HI YEL (HEAT) YEL 24 MED BLK 4 RED L BLU M 3 BLOWER BLK H 2 1 MOTOR WHT COM TRANSFORMER LOW EQUIPMENT GROUND L1 L2 or N BLK *WHT BLK *WHT Fig.
there is no flow through valve. Ball valves may be used as shutoff valves. Step 6 — Cut out Openings for Grilles and Thermostats — On all units with optional supply-air or return-air grilles, dampers, thermostats, and switch plates, cut out openings where specified on the job plans. Be careful not to cut wires, piping or structural supports. For remote-mounted thermostats use a steel thermostat shield ring to protect drywall from thermostat wiring where applicable.
After proper airflow and supply power are assured, regular filter maintenance is important to provide clean air over the heater. Dirt that is allowed to deposit on the heating element will cause hot spots and eventual element burn through. These hot spots will normally not be enough to trip the high-limit thermal cutout device and may not be evident until actual heater element failure. Standard motors are permanently sealed and lubricated.
Copyright 2009 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420004-01 Printed in U.S.A.
START-UP CHECKLIST FOR 42C,D,S,V SERIES FAN COIL AIR CONDITIONERS I.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53420004-01 Printed in U.S.A.
