Carrier 42BHC - Manuals

5 Thermostats — Three thermostats are available for field installation:Honeywell T834C manual changeover, single-stage heatthermostat features:• off-cool-heat system switch• on-auto fan mode switch• single-stage electric heat• outside air signalHoneywell T8500 digital, automatic/manual changeover,2-...

6 Base unit dimensions 42BHC FAN COIL BASE UNIT (NO CONTROLS) NOTES: 1. All dimensions are in inches (± 1 / 4 in.). 2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to change without notice. 3. Right hand shown,...

7 42BHC FAN COIL WITH MOTOR CONTROL OPTION NOTES: 1. All dimensions are in inches (± 1 / 4 in.). 2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to change without notice. 3. Right hand shown, left hand opposite...

8 Base unit dimensions (cont) 42BHC FAN COIL WITH ELECTRIC HEAT OPTION NOTES: 1. All dimensions are in inches (± 1 / 4 in.). 2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to change without notice. 3. Right ha...

10 NOTES: 1. All dimensions are in inches (± 1 / 4 in.). 2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications aresubject to change without notice. 3. RH shown, LH opposite.4. Hanger rods, which are field-supplied, are shown for...

11 42BVC FAN COIL WITH ELECTRIC HEAT OPTION NOTES: 1. All dimensions are in inches (± 1 / 4 in.). 2. Any modifications to product specifications by any person are subject to acceptance of the factory. Product specifications are subject to change without notice. 3. Right hand shown, left hand opposit...

14 Accessory dimensions 3 A C 2.4 4 H 2.4 3 1 2 2 W B TOP VIEWS BOTTOM/REAR INLET TOP/REAR INLET RIGHT HAND SIDE VIEWS W 4 2.4 C 1 H A A B A 2.4 MIXING BOX NOTE: All dimensions in inches. 42BHC,BVC UNIT SIZE DIMENSIONS (in.) H W A B C 06 18.5 28 6 24 11 08 18.5 28 6 24 11 10 20.25 37 8 33 13 12 20.2...

15 1 W D 3 A 1 FRONT VIEW SIDE VIEW MIXING BOX RAILS NOTE: All dimensions in inches. UNIT DIMENSIONS (in.) W D A 42BHC06 28 51.6 16.1 42BHC08 28 51.6 16.1 42BHC10 37 55.2 18.1 42BHC12 37 55.2 18.1 42BHC16 47 55.4 18.1 42BHC20 48 57.8 18.1 42BHC30 48 59.8 20.1 42BHC40 62 63.0 20.1 UNIT DIMENSIONS (in...

16 Accessory dimensions (cont) A A B B D C F F E E D C VALVE PACKAGES NOTE: All dimensions in inches. CONTROL VALVE PIPING PACKAGE SIZE A B C D E F Cv CLOSE OFF Normal Close Off Spring Return 2-way 1 / 2 in. 12.45 2.285 — — 15.25 7.41 3.5 25 psig 3 / 4 in. 12.71 3.156 — — 17.71 7.936 5 20 psig 1 in....

17 C D HWS B A 2 (51) RH Tell-Tale Drain LH Tell-Tale 0 CWS CWR HWR 1-5/ 8 (41) ) 4 6 2( 8/ 3- 0 1 E F ) 9 1 2( 8/ 5- 8 H G ) 5 7 1( 8/ 7- 6 0 PIPING CONNECTION LOCATION DIAGRAM* LEGEND *Right-hand unit with re-heat coil shown. CWR — Cold Water Return CWS — Cold Water Supply HWR — Hot Water Return H...

19 Basic definitions Unit hand — When facing the supply air outlet from the front of the unit (air blowing in your face), your right handwill be the right hand side of the unit and your left hand theleft hand side of the unit. PIPING COMPONENTS LEGEND *Check all system component pressure ratings (co...

21 PIPING COMPONENTS (cont) LEGEND NOTES:1. Motorized spring return 2-way valves have a maximum close-off differential of 25 psi.2. Motorized spring return 3-way valves have a maximum close-off differential of 25 psi. SYMBOL/SKETCH DESCRIPTION C V FACTOR RATING 1 / 2 3 / 4 1 PSI F 2-WAY MOTORIZED VA...

22 This selection procedure provides a guide to determineunit performance of the 42BHC, BVC units. Capacitytables (in Performance Data) are based on nominal cfm.Correction factors are provided for other operating condi-tions as explained in the following selection example. For applications outside t...

23 42BHC,BVC AIRFLOW CORRECTION FACTORS NOTE: Use Sensible Heat correction factors when calculating heatingcapacity. DIRECT EXPANSION (DX) CORRECTION FACTORS Consult factory for values outside of table.DX Total Capacity (MBtuh) = Base Et x Total Correction FactorDX Sensible Capacity (MBtuh) = Base E...

24 42BHC, BVC NOMINAL COOLING CAPACITIES LEGEND *Based on entering air temperature of 67 F wb, 80 F db and temperature rise of 10 degrees F. NOTE: All ratings at sea level. Ratings in accordance with ARI (Air Conditioning &Refrigeration Institute). 42BHC,BVC NOMINAL HEATING CAPACITIES NOTES: 1. ...

30 UNIT HORSEPOWER DATA TABLE LEGEND NOTES: 1. Contact factory if higher horsepower selection is required for a given cfm and total static pressure. 2. The variable pitch motor sheave provided will allow + 15% rpm adjustment. Unit sizes 06, 08, 10 and 12 have 3 / 4 in. bore fan sheaves. Unit sizes 1...

32 42BHC,BVC COMPONENT STATIC RESISTANCE (in. wg) Hydronic coil pressure drop — All of the factory’s hy- dronic coils have a coefficient of velocity (Cv) resistancefactor assigned to assist in a more accurate determinationof water pressure drop (see Cv Factor by Coil and Unit Sizetable below). Calcu...

33 42BHC,BVC WATER PRESSURE DROP (ft. wg) FOR CV FACTOR AND WATER FLOW RATE (GPM) NOTE: Table interpolation is permissible, and extrapolation is not rec-ommended. SOUND POWER DATA DISCHARGE SOUND RATINGS — A-WEIGHTED SOUND POWER LEVEL RATINGS* (dB) *These noise ratings are calculated values, not act...

34 Typical wiring schematics BASE UNIT, SINGLE-PHASE POWER MOTOR CONTROL/DISCONNECT OPTION SINGLE-PHASE POWER

35 BASE UNIT, THREE-PHASE POWER MOTOR CONTROL/DISCONNECT OPTION THREE-PHASE POWER

36 Typical wiring schematics (cont) 2-PIPE COOLING ONLY WITH SINGLE-SPEED FAN OPERATION AND HONEYWELL THERMOSTAT 2-PIPE OR 4-PIPE HEATING/COOLING WITH SINGLE-SPEED FAN OPERATION AND HONEYWELL DIGITAL THERMOSTAT NOTES: 1. Optional valves are field wired.2. No HW valve with electric heat. NOTES: 1. Op...

37 42BHC,BVC ELECTRIC HEATER DATA AVAILABILITY 42BHC,BVC ELECTRIC HEATER DATA LEGEND NOTES: 1. Stages available: Single phase: 1-12 kW, 1 stage only 3-12 kW, 1 stage or 2 stage Three phase: 1-40 kW, 1 stage only 4-40 kW, 1 or 2 stage12-40 kW, 1, 2 or 3 stage 2. Electric Heating Capacities (Btuh) = H...

38 Standard control features • 4 in. x 4 in. junction boxNOTE: Motor leads are wired to the 4 in. x 4 in. junctionbox, mounted on the external panel. Field verification ofthe motor rotation is required on 3-phase applications. Motor control options • Interlocking disconnect switch*• 24-v class 2 tra...

39 System Fan Coil Unit HVAC Guide Specifications — 42B Size Range: 600 to 4000 Nominal Cfm Carrier Model Number: 42BHC (Horizontal Fan Coil Unit) 42BVC (Vertical Fan Coil Unit)Part 1 — General 1.01 SYSTEM DESCRIPTION Horizontal and vertical, 2-pipe or 4-pipe, belt-driven, galvanized casing model fa...