Product Data. Features/Benefits. 50HJQ016 Single-Package Rooftop Heat Pump Units 50 Hz kw (15 Nominal Tons)

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1 Product Data 50HJQ016 Single-Package Rooftop Heat Pump Units 50 Hz 44.2 kw (15 Nominal Tons) High-performance, single-package rooftop heat pump products with the following industry-leading premium features. Chronotemp defrost controls Cooling EER of 9.7 Serviceable semi-hermetic compressors Service valves and full refrigeration system safeties High-static oversized fan motors (standard) Variable-pitch belt drive fan motors (standard) TEMP system compatible Apollo electronic controls (optional) Features/Benefits Industry-leading cooling EERs The 50HJQ016 unit provides leading ARI (Air Conditioning and Refrigeration Institute U.S.A. Standard) certified cooling EER (Energy Efficiency Ratio) of 9.7. This exceptionally high rating assures minimum operating costs and will qualify for attractive utility rebates in many areas. Semi-hermetic compressors The 50HJQ unit uses the Carlyle 06D semi-hermetic compressors. These serviceable compressors are highly regarded, preferred by owners and users, and are offered exclusively on the Carrier high-efficiency 50HJQ016 units. Two 06D semi-hermetic compressors on independent refrigeration circuits are offered on these 50HJQ016 units for 2 steps of capacity control and redundancy. Compressors have service valves and a full Copyright 1996 Carrier Corporation Form 50HJQ-C1PD

2 complement of safety devices, including high- and low-pressure switches, over-temperature protection, lowtemperature protection, an electronic cooling lockout device, and crankcase heaters. High static oversized fan motors and variable-pitch belt drives The 50HJQ016 unit has oversized evaporator-fan motors and variablepitch belt drives supplied standard from the factory to provide over 5.76 kpa (1.7 in. wg) of external static pressure at 1.89 L/s (400 cfm) per ton with wet coils and clean filters installed. This increases to 6.77 kpa (2.0 in. wg) with field-supplied pulleys. A 5 hp motor is provided standard. Easy installation The 50HJQ016 rooftop heat pump units are perfect for vertical supply and return roof curb mount applications on new construction, retrofit, and replacement applications. The unique industry-leading compact size and weight are favored by designers, contractors, owners, and users. The compact physical size and weight are not only advantages in terms of minimizing required roof structures on new construction and retrofit jobs, but also make the 50HJQ016 the perfect replacement unit for the original Carrier 50DP,DR (cooling only) or 50PQ (heat pump) units installed in the late 1970s and early 1980s to meet the upgraded job requirements of the 1990s. The new 50HJQ units can be easily converted to horizontal supply and return with Carrier s new fanperformance-boosting, horizontal, high-static regain adapter (part no. 50DP900211). This vertical-tohorizontal supply/return adapter is not only fully factory assembled with a built-in insulated transition duct, it improves fan performance by as much as 2.03 kpa (0.6 in. wg) of static. Efficient operation, dependable performance Built with energy efficiency in mind, the 50HJQ cooling coils feature staggered copper tubes and mechanically bonded aluminum fins to provide top efficiency. A manual outdoor-air damper can be preset to admit up to 25% outdoor air for year-round ventilation. Units equipped with economizer have a thermostatically controlled, fully modulating damper which admits up to 100% outdoor air and provides lowcost cooling. Temperature control governs economizer cooling changeover to provide lowest cost operation in mild weather. Special check valves and fixed orifice refrigerant metering provide improved heat transfer for the best performance possible during both heating and cooling modes. The patented Chronotemp defrost system uses time and temperature to keep the outdoor coil frost-free for economical, dependable cooling operation at temperatures down to 4 C (40 F) as shipped from the factory. Accessory low-ambient kit permits unit operation in cooling at outdoor ambient temperatures down to 29 C ( 20 F). Condenser fans are direct driven, factory-lubricated, and positioned for quiet, efficient vertical discharge. The 50HJQ unit s high technology design features a computer-programmed balance between compressor, outdoor section, and indoor section. Carrier specified semi-hermetic compressors are equipped with crankcase heaters, calibrated circuit breakers for overcurrent protection, and Cycle-LOC compressor protection. If any safety device trips, Cycle-LOC compressor protection prevents short cycling by shutting off the compressor until the Cycle-LOC protection mechanism is reset. Compressor restart is accomplished at the space thermostat. The crankcase heater prevents refrigerant dilution of oil during off cycles ensuring proper lubrication at start-up and prolonging compressor life. Electric heat and an integrated economizer are accessories/options on all units. The weather resistant cabinet is designed for durability under all climatic conditions. The unit cabinet is made of galvanized steel and is prepainted for long life and good looks. UNIQUE SLIDE-OUT MOTOR MOUNT TYPICAL SERVICEABLE, SEMI-HERMETIC 06D COMPRESSOR 2

3 Table of contents Page Features/Benefits...1,2 Model Number Nomenclature...3 Standard Capacity Ratings...4 Physical Data Options and Accessories...7,8 Base Unit Dimensions...9 Accessory Dimensions...10,11 Selection Procedure...12,13 Performance Data Electrical Data...22 Typical Piping and Wiring...23 Typical Wiring Schematic...24,25 Controls Application Data...30,31 Guide Specifications Model number nomenclature Al Aluminum Cu Copper *Refer to 50HJQ price pages for 50HJQ factory-installed option table or contact your local Carrier representative. 3

4 Standard capacity ratings 50HJQ016 Cooling High-Temperature Heating Low-Temperature Heating Standard Airflow Capacity Power Capacity Power Capacity Power Input EER Input COP Input COP L/s CFM kw Btuh kw kw Btuh kw kw Btuh kw , , , COP Coefficient of Performance db Dry Bulb EER Energy Efficiency Ratio L/s Liters per Second NOTE: Standard ratings are net values, reflecting the effects of circulating fan motor power and heat. Cooling Standard: 26.7 C (80 F) db, 19.4 C (67 F) wb indoor enteringair temperature and 35 C (95 F) db air entering outdoor unit. High-Temperature Heating Standard: 21.2 C (70 F) indoor enteringair temperature and 8.3 C (47 F) db, 6.1 C (43 F) wb air entering outdoor unit. Low-Temperature Heating Standard: 21.2 C (70 F) indoor enteringair temperature and 8.3 C (17 F) db, 9.4 C (15 F) wb air entering outdoor unit. Physical data WEIGHT DISTRIBUTION AND CENTER OF GRAVITY WEIGHT WEIGHT OF CORNER DIMENSIONS UNIT 50HJQ A B C D X Y Z Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. mm ft-in. mm ft-in. mm

5 Physical data (SI) UNIT SIZE 50HJQ 016 OPERATING WT (kg) Al/Al* 873 Al/Cu* 941 Cu/Cu* 982 Electric Heat 29 Economizer 50 Roof Curb 90 COMPRESSOR 06D 818 Semi-Hermetic Number 2 Cylinders 4 REFRIGERANT TYPE R-22 Charge (kg) System System OUTDOOR COIL 10 mm, Internally-Grooved Copper Tubes, Aluminum or Copper Plate Fins Rows 3 Fins/m 590 Total Face Area (m 2 ) 2.02 OUTDOOR FAN Propeller Type, Direct Drive Nominal L/s 4250 Number...Diameter (mm) Motor kw (17.9 R/s).375 Watts Input (Total) 1090 INDOOR COIL 10 mm, Internally-Grooved Copper Tubes, Aluminum or Copper Plate Fins Expansion Device Fixed Orifice Rows 3 Fins/m 590 Total Face Area (m 2 ) 1.63 INDOOR FAN Centrifugal, Adjustable Pitch Belt Drive Quantity...Size (mm) x 305 Nominal L/s 2832 Fan R/s Range Maximum Allowable R/s 25.8 Motor Pulley Pitch Diameter (mm) 124/150 Fan Pulley Pitch Diameter (mm) 200 Belt, Quantity...Type...Length (mm) 1...BX Pulley Center Line Distance (mm) Factory Speed Setting (R/s) 16.7 Motor kw (Service Factor) 3.75 (1.15) Motor Frame Size 184T Motor Efficiency 0.85 HIGH-PRESSURE SWITCH Cutout (kpa) 2939 Reset (kpa) 2208 LOW-PRESSURE/LOSS-OF-CHARGE SWITCH Cutout (kpa) 48 Reset (kpa) 152 AIR INLET SCREENS Cleanable Economizer, Quantity...Size (mm) x 635 x x 508 x 25 RETURN-AIR FILTERS (TYPE) 10% Efficient 51 mm (2-in.) Throwaway Fiberglass Quantity... Size (mm) x x 508 Al Aluminum Cu Copper *Indoor coil fin material/outdoor coil fin material. Weight of 355 mm roof curb. 5

6 Physical data (English) UNIT SIZE 50HJQ 016 OPERATING WT (lb) Al/Al* 1925 Al/Cu* 2075 Cu/Cu* 2165 Electric Heat 65 Economizer 110 Roof Curb 200 COMPRESSOR 06D 818 Semi-Hermetic Number 2 Cylinders 4 REFRIGERANT TYPE R-22 Charge (lb) System System OUTDOOR COIL 3 8 in., Internally-Grooved Copper Tubes, Aluminum or Copper Plate Fins Rows 3 Fins/m 15 Total Face Area (sq ft) 21.7 OUTDOOR FAN Propeller Type, Direct Drive Nominal Cfm 9000 Number...Diameter (in.) Motor Hp (1075 Rpm) 1 2 Watts Input (Total) 1090 INDOOR COIL 3 8 in., Internally-Grooved Copper Tubes, Aluminum or Copper Plate Fins Expansion Device Fixed Orifice Rows 3 Fins/m 15 Total Face Area (sq ft) 17.5 INDOOR FAN Centrifugal, Adjustable Pitch Belt Drive Quantity...Size (in.) x 12 Nominal Cfm 6000 Fan Rpm Range Maximum Allowable Rpm 1550 Motor Pulley Pitch Diameter (in.) 4.9/5.9 Fan Pulley Pitch Diameter (in.) 7.9 Belt, Quantity...Type...Length (in.) 1...BX...50 Pulley Center Line Distance (in.) Factory Speed Setting (Rpm) 1000 Motor Hp (Service Factor) 5 (1.15) Motor Frame Size 184T Motor Efficiency 0.85 HIGH-PRESSURE SWITCH Cutout (psig) 426 Reset (psig) 320 LOW-PRESSURE/LOSS-OF-CHARGE SWITCH Cutout (psig) 7 Reset (psig) 22 AIR INLET SCREENS Cleanable Economizer, Quantity...Size (in.) x 25 x x 20 x 1 RETURN-AIR FILTERS (TYPE) 10% Efficient 2-in. Throwaway Fiberglass Quantity... Size (in.) x x 20 Al Aluminum Cu Copper *Indoor coil fin material/outdoor coil fin material. Weight of 14 in. roof curb. 6

7 Options and accessories ITEM OPTION* ACCESSORY Apollo Communicating Controls X Electric Heat X X Integrated Economizer with Hood X X Enthalpy Sensor X Differential Enthalpy Sensor Kit X Emergency Heat Package X Barometric Relief Damper X Two-Position Damper X Roof Curb (Horizontal and Vertical) X Horizontal Adapter X Thermostat and Subbase X Electronic Programmable Thermostat X Power Exhaust X Motormaster Head Pressure Control X 25 F Low-Ambient Kit** X 20 F Low-Ambient Kit** X Time Guard II Control (Circuit 2) X Glycol Coil X *Factory Installed. Field Installed. **Consists of a combination of accessories. Refer to Price Pages for more details or contact your local Carrier representative. GLYCOL COIL HEAD PRESSURE CONTROL MOTORMASTER I The 50HJQ standard units are designed to operate at outdoor temperatures down to 4 C (40 F). With accessory Motormaster control (outdoor-fan speed modulation), units can operate at lower outdoor temperatures. The head pressure controls, which mount in the outdoor-air section, modulate the outdoor-fan motor to maintain correct condensing temperature. Refer to unit price pages for complete information on low outdoor-ambient operation accessories or contact your local Carrier representative. TIME GUARD II CONTROL Time Guard II Control automatically prevents compressor from restarting for at least 5 minutes after a shutdown. Accessory prevents short cycling of compressor if thermostat is rapidly changed. Accessory Time Guard II device mounts in the control compartment of unit to provide control on circuit 2. Time Guard II control is standard on compressor no. 1. Glycol coil is intended for add-on type applications or new installations where a boiler system is available. Glycol coil and electric heat cannot be installed together. NOTE: Dimensions in ( ) are in millimeters. ELECTRONIC PROGRAMMABLE THERMOSTAT Electronic programmable thermostat provides efficient temperature control by allowing you to program heating and cooling setbacks and setups with provisions for weekends and holidays. Accessory remote sensing package is also available to provide tamperproof control in high-traffic areas. Used in conjunction with factory-installed Apollo communicating control, this thermostat provides a 5-minute recycle timer between modes of operation for short-cycle protection. The 50HJQ units have 2 independent control circuits, each with a different transformer. Due to this advanced design, a thermostat with the capability to handle heating (RH terminal) and cooling (RC terminal) separately is required for proper unit operation. If a jumper is provided on the thermostat between the RH and RC terminals, it MUST be removed prior to unit start-up. 7

8 Options and accessories (cont) THERMOSTAT H C Zone thermostat (24 v) provides 2-stage cooling for control of unit. Matching subbases are available with or without tamperproof switches and automatic changeover. The 50HJQ units have 2 independent control circuits, each with a different transformer. Due to this advanced design, a thermostat with the capability to handle heating (RH terminal) and cooling (RC terminal) separately is required for proper unit operation. If a jumper is provided on the thermostat between the RH and RC terminals, it MUST be removed prior to unit start-up. OPTIONAL FACTORY-INSTALLED APOLLO COMMUNICATING CONTROLS POWER EXHAUST When used with accessory/optional economizer, the power exhaust accessory helps to relieve building over-pressurization. The Apollo direct digital controls are designed exclusively by Carrier, and are used to actively monitor all modes of operation as well as indoor-fan status, filter status, supply-air temperature, outdoor-air temperature, and indoor-air quality. They are designed to work in conjunction with Carrier TEMP and VVT system thermostats. INTEGRATED ECONOMIZER ELECTRIC HEATER Electric heaters are available in a wide range of capacities for factory or field installation. Units equipped with economizer have a thermostatically controlled, fully modulating damper which admits up to 100% outdoor air and provides low-cost cooling. Temperature control governs economizer cooling changeover to provide lowest cost operation in mild weather (down to 13 C [55 F]). 8

9 Base unit dimensions UNIT MAXIMUM SHIPPING WEIGHT* 50HJQ Lb Kg *Units with aluminum indoor and outdoor coil fins. DIMENSIONS UNIT 50HJQ X Y Ft-in. mm Ft-in. mm KO Knockout NOTES: 1. Dimensions in ( ) are in millimeters. 2. Center of gravity. 3. Direction of airflow. 4. Ductwork to be attached to accessory roof curb only. 5. Minimum clearance: a. Rear: 7-0 (2134) for coil removal. This dimension can be reduced to 4-0 (1219) if conditions permit coil removal from the top. b. Left side: 4-0 (1219) for proper outdoor coil airflow. c. Front: 4-0 (1219) for control box access. d. Right side: 4-0 (1219) for proper operation of damper and power exhaust (if so equipped). e. Top: 6-0 (1829) to assure proper outdoor fan operation. f. Local codes or jurisdiction may prevail. 6. With the exception of clearance for the outdoor coil and the damper and power exhaust as stated in note no. 5, a removable fence or barricade requires no clearance. 7. Dimensions are from outside of corner post. Allow (8) on each side for top cover drip edge. WEIGHT OF CORNER* UNIT A B C D 50HJQ Lb Kg Lb Kg Lb Kg Lb Kg *Weights are for unit only and do not include options or crating. 9

10 Accessory dimensions HORIZONTAL AND VERTICAL ROOF CURBS AND HORIZONTAL ADAPTER ACCESSORY PACKAGE NO. 50PQ PQ PQ DP CURB HEIGHT 1-2 (305) 2-0 (610) 2-0 (610) 1-11 (584) DESCRIPTION A B C Standard Curb 14 High Standard Curb for Units Requiring High Installation Horizontal Supply and Return Curb Pre-Assembled, High-Static, Horizontal Adapter 5-6 (1676) 6-2 (1880) (64) (159) 1-6 (457) (371) COMP SECT. Compressor Section NOTES: 1. Roof curb accessory is shipped unassembled. 2. Insulated panels, 1 2-in. thick neoprene-coated, 2 lb density. 3. Dimensions in ( ) are in millimeters. 4. Direction of airflow. NOTE: To prevent the hazard of stagnant water build-up in the drain pan of the indoor-air section, unit can only be pitched as shown. 5. Roof curb: 18 gage steel. 6. Attach all ductwork to roof curb. 10

11 HORIZONTAL ADAPTER INSTALLATION NOTES: 1. 50DP is a fully factory preassembled horizontal adapter which includes an insulated high static regain transition duct and substantially improves fan static performance. 2. Dimensions in [ ] are in millimeters. 11

12 Selection procedure (with example) (SI) I Determine heating and cooling requirements at design conditions. Given: Required Cooling Capacity (TC) kw Sensible Heat Capacity (SHC) kw Required Heating Capacity kw Outdoor-Air Temperature (Cooling)... 35C Indoor Entering-Air Temperature (Cooling) C Edb/19 C Ewb Outdoor Coil Entering-Air Temperature (Heating) C Indoor Winter Design Temperature...21C Indoor-Air Quantity L/s External Static Pressure (ESP) Pa Electrical Characteristics (V-Ph-Hz) Economizer is specified. Edb Entering dry bulb Ewb Entering wet bulb II Select unit based on required cooling capacity. Enter Cooling Capacity table on page 14 at outdoorair entering temperature of 35 C, indoor air entering at 2832 L/s and 19 C. The 50HJQ016 will provide a total capacity (TC) of 46.4 kw, a sensible heat capacity (SHC) of 37.6 kw Btuh and a total unit kw of For indoor-air temperature other than 26.7 C edb, calculate sensible heat capacity correction, as required, using the formula found in Note 3 following the Cooling Capacities table on page 14. NOTE: Unit ratings are gross capacities and do not include the effect of indoor-fan motor heat. To calculate net capacities, see Step V. III Select electric heat. Enter the Integrated Heating Capacities table on page 16 at 2832 L/s cfm. At 21 C return indoor air and 18 C air entering the outdoor coil, the integrated heating capacity is 14.9 kw with a unit input kw of The required heating capacity is 49.8 kw; therefore, 34.9 kw (49.8 kw 14.9 kw) additional electric heat is necessary. Enter the Electric Resistance Heater Data table at The 40-kW heater satisfies the electric heater requirement. IV Determine fan speed and motor horsepower requirements at design conditions. Before entering Fan Performance table, calculate the total static pressure required based on unit components. From the given and the Accessory/FIOP Static Pressure table on page 21, find: External static pressure Pa Economizer static pressure 17.0 Pa Electric heat static pressure 30.0 Pa Total static pressure Pa Enter the Fan Performance table on page 18. At 2832 L/s and Pa external static pressure, the fan speed is 21.1 r/s and the BkW is 3.28 (interpolation required). A field-supplied drive is required. To determine the input power of the motor, use the following formula: BkW IFM Watts = Motor Efficiency 3.23 =.85 = 3.8 kw V Determine net capacities. Capacities are gross and do not include the effect of indoor-fan motor (IFM) heat. Determine net cooling capacity as follows: Net capacity = Gross capacity IFM heat = 46.4 kw 3.8 kw = 42.6 kw Net sensible capacity = 37.6 kw 3.8 kw = 33.8 kw Determine net heating capacity as follows: Net capacity = Gross capacity + IFM heat + Electric heat capacity = 14.9 kw kw + 40 kw = 58.7 kw 12

13 Selection procedure (with example) (English) I Determine heating and cooling requirements at design conditions. Given: Required Cooling Capacity (TC) ,000 Btuh Sensible Heat Capacity (SHC)...115,000 Btuh Required Heating Capacity...170,000 Btuh Outdoor-Air Temperature (Cooling)...95F Indoor Entering-Air Temperature (Cooling)...80FEdb/67 F Ewb Outdoor Coil Entering-Air Temperature (Heating)...0 F Indoor Winter Design Temperature...70F Indoor-Air Quantity Cfm External Static Pressure (ESP) in. wg Electrical Characteristics (V-Ph-Hz) Economizer is specified. Edb Entering dry bulb Ewb Entering wet bulb II Select unit based on required cooling capacity. Enter Cooling Capacity table on page 15 at outdoorair entering temperature of 95 F, indoor air entering at 6000 cfm and 67 F ewb. The 50HJQ016 will provide a total capacity (TC) of 158,400 Btuh, a sensible heat capacity (SHC) of 128,400 Btuh and a total unit kw of For indoor-air temperature other than 80 F edb, calculate sensible heat capacity correction, as required, using the formula found in Note 3 following the Cooling Capacities table on page 15. NOTE: Unit ratings are gross capacities and do not include the effect of indoor-fan motor heat. To calculate net capacities, see Step V. III Select electric heat. Enter the Integrated Heating Capacities table on page 17 at 6000 cfm. At 70 F return indoor air and 0 F air entering the outdoor coil, the integrated heating capacity is 51,000 Btuh with a unit input kw of The required heating capacity is 170,000 Btuh; therefore, 119,000 Btuh (170,000 51,000) additional electric heat is necessary. Determine the additional electric heat capacity in kw. 119,000 Btuh = 34.9 kw 3412 Btuh/kW Enter the Electric Resistance Heater Data table at The 40-kW heater satisfies the electric heater requirement. IV Determine fan speed and motor horsepower requirements at design conditions. Before entering Fan Performance table, calculate the total static pressure required based on unit components. From the given and the Accessory/FIOP Static Pressure table on page 21, find: External static pressure 1.45 in. wg Economizer static pressure 0.07 in. wg Electric heat static pressure 0.12 in. wg Total static pressure 1.64 in. wg Enter the Fan Performance table on page 19. At 6000 cfm and 1.64 in. wg external static pressure, the fan speed is 1266 and the bhp is 4.33 (interpolation required). The standard motor and drive are suitable. V Determine net capacities. Capacities are gross and do not include the effect of indoor-fan motor (IFM) heat. Determine net cooling capacity as follows: Net capacity = Gross capacity IFM heat = 158, bhp = 158,400 12,964 = 145,435 Btuh Net sensible capacity = 128,400 12,964 = 115,436 Btuh 2545 Btuh hp.85 Determine net heating capacity as follows: Net capacity = Gross capacity + IFM heat + Electric heat capacity = 51,000 + (IFM kw x 3412) + (Elec. kw x 3412) = 51, ,964 + ( ) = 51, , ,480 = 200,444 Btuh 13

14 Performance data 50HJQ016 Temp (C) Air Ent Outdoor Coil (edb) COOLING CAPACITIES (SI) Indoor Entering Air L/s/BF 2124/ / / / /0.12 Indoor Entering Air Ewb (C) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw BF Bypass Factor Edb Entering Dry-Bulb Temperature (C) Ewb Entering Wet-Bulb Temperature (C) kw Compressor Input (kw) SHC Sensible Heat Capacity (kw) TC Total Capacity (kw) NOTES: 1. Ratings are gross, and do not account for the effects of the evaporatorfan motor power and heat. 2. Direct interpolation is permissible. Do not extrapolate. 3. SHC is based on 26.7 C db temperature of air entering the unit. At any other temperature, correct the SHC read from the table of cooling capacities as follows: Corrected SHCkW = SHC + [ (1 BF) (Cdb 26.7) L/s] Observe the rule of sign. Above 26.7 C, SHC correction will be positive; add it to SHC. Below 26.7 C, SHC correction will be negative; subtract it from SHC. 4. Formulas: SHCkW 1000 Cldb = Cedb 1.23 L/s Leaving wet bulb = wet bulb temperature corresponding to enthalpy of air leaving coil (hlwb). TCkW 1000 hlwb = hewb 1.20 L/s Where hewb is enthalpy of air entering evaporator coil (kj/kg). 14

15 50HJQ016 Temp (F) Air Ent Outdoor Coil (edb) COOLING CAPACITIES (ENGLISH) Indoor Entering Air Cfm/BF 4500/ / / / /0.12 Indoor Entering Air Ewb (F) TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw TC SHC kw BF Bypass Factor Edb Entering Dry-Bulb Ewb Entering Wet-Bulb kw Compressor Motor Power Input SHC Gross Sensible Heat Capacity (1000 Btuh) TC Gross Total Capacity (1000 Btuh) NOTES: 1. Direct interpolation is permissible. Do not extrapolate. 2. The following formulas may be used: t ldb = tedb Sensible capacity (Btuh) 1.10 x cfm t = Wet-bulb temperature corresponding to enthalpy of air leaving lwb indoor coil (h ). lwb h lwb = hewb total capacity (Btuh) 4.5 x cfm Where: h ewb = Enthalpy of air entering indoor coil. 3. SHC is based on 80 F edb temperature of air entering indoor coil. Below 80 F edb, subtract (corr factor x cfm) from SHC. Above 80 F edb, add (corr factor x cfm) to SHC. ENTERING AIR DRY-BULB TEMP (F) under over 85 Correction Factor Use formula shown below. BYPASS FACTOR (BF) Interpolation is permissible. Correction Factor = 1.10 x (1 BF) x (edb 80). 15

16 Performance data (cont) INTEGRATED HEATING CAPACITIES (SI) 50HJQ016 Temp (C) Air Ent. Indoor Coil (edb) Indoor Air L/s (Std) Temperature Air Entering Outdoor Coil (C db at 75% rh) Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap. Capacity (kw) db dry bulb kw Total Power rh Relative Humidity Std Standard 16

17 50HJQ016 Temp (F) Air Ent. Indoor Coil (edb) Indoor Air Cfm (Std) INTEGRATED HEATING CAPACITIES (ENGLISH) Temperature Air Entering Outdoor Coil (F db at 75% rh) Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap kw Cap. Capacity (1000 Btuh) db dry bulb kw Compressor and Outdoor-Fan Power Input rh Relative Humidity Std Standard 17

18 Performance data (cont) 50HJQ016 Airflow (L/s) FAN PERFORMANCE (SI) External Static Pressure (Pa) R/s kw BkW R/s kw BkW R/s kw BkW R/s kw BkW R/s kw BkW HJQ016 (cont) Airflow (L/s) External Static Pressure (Pa) R/s kw BkW R/s kw BkW R/s kw BkW R/s kw BkW R/s kw BkW BkW Fan Input kw Motor Efficiency FIOP Factory-Installed Option kw Kilowatt Input to Motor NOTES: 1. Boldface indicates field-supplied drive required. 2. indicates field-supplied motor and drive required. 3. All other numbers indicate standard operation. 4. Factory-shipped motor drive range is 15.4 to 18.6 r/s. Other r/s s may require a field-supplied drive. 5. Maximum continuous BkW is 4.2 and maximum continuous kw is Static pressure losses (i.e., economizer) must be added to external static pressure before entering Fan Performance table. 7. Interpolation is permissible. Do not extrapolate. 8. Fan performance is based on wet coils, clean filters, and casing losses. See page 21 for accessory/fiop static pressure information. 9. Extensive motor and drive testing on these units ensures that the full BkW range of the motor can be utilized with confidence. Using your fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. 18

19 50HJQ016 Airflow (Cfm) FAN PERFORMANCE (ENGLISH) External Static Pressure (in. wg) Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp HJQ016 (cont) Airflow (Cfm) External Static Pressure (in. wg) Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Bhp Brake Horsepower Input to Fan FIOP Factory-Installed Option Watts Input Watts to Motor NOTES: 1. Boldface indicates field-supplied drive required. 2. indicates field-supplied motor and drive required. 3. All other numbers indicate standard operating range. 4. Factory-shipped motor drive range is 924 to 1113 rpm. Other rpms may require a field-supplied drive. 5. Maximum continuous bhp is 5.90 and maximum continuous watts are Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. 6. Static pressure losses (i.e., economizer) must be added to external static pressure before entering Fan Performance table. 7. Interpolation is permissible. Do not extrapolate. 8. Fan performance is based on wet coils, clean filters, and casing losses. See page 21 for accessory/fiop static pressure information. 9. Extensive motor and drive testing on these units ensures that the full horsepower and watts range of the motor can be utilized with confidence. Using your fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. 19

20 Peformance data (cont) FAN PERFORMANCE USING ACCESSORY POWER EXHAUST HORIZONTAL SUPPLY/RETURN FAN PERFORMANCE WITH 50DP HIGH STATIC REGAIN ADAPTER NOTE: The 50DP high static regain adapter accessory may be used to provide horizontal supply/return. UNIT 50HJQ (18.6) *Approximate fan r/s (rpm) shown. UNIT 50HJQ FAN R/S (RPM) AT MOTOR PULLEY SETTINGS* MOTOR PULLEY TURNS OPEN (18.2) (17.9) (17.6) (17.3) (16.9) (16.7) (16.3) (16.0) (15.7) HEATER kw Unit Voltage 400 v ELECTRIC RESISTANCE HEATER DATA HEATER STAGES % HEAT PER STAGE MAXIMUM STAGES* / /67 3 *Maximum number of stages using accessory outdoor-air thermostats. 924 (15.4) 20

21 ACCESSORY/FIOP STATIC PRESSURE, 50HJ016 (Pa) ACCESSORY/FIOP kw L/s Electric Heaters Economizer Glycol Coil FIOP Factory-Installed Option NOTES: 1. Heaters are rated at 400 v. 2. The static pressure must be added to external static pressure. The sum and the indoor-air section entering-air L/s should then be used in conjunction with Fan Performance table (SI) to determine blower r/s, kw, and BkW. ACCESSORY/FIOP STATIC PRESSURE, 50HJQ016 (in. wg) ACCESSORY/FIOP kw CFM Electric Heaters Economizer Glycol Coil FIOP Factory-Installed Option NOTES: 1. Heaters are rated at 400 v. 2. The static pressure must be added to external static pressure. The sum and the indoor-air section entering-air cfm should then be used in conjunction with Fan Performance table (English) to determine blower rpm, watts, and bhp. EVAPORATOR-FAN MOTOR PERFORMANCE UNIT 50HJQ UNIT VOLTAGE MAXIMUM ACCEPTABLE CONTINUOUS BkW* MAXIMUM ACCEPTABLE CONTINUOUS BHP* MAXIMUM ACCEPTABLE OPERATING WATTS MAXIMUM AMP DRAW Bhp Brake Horsepower BkW Fan Input Watts Motor Efficiency *Extensive motor and electrical testing on these units ensures that the full BkW or brake horsepower range of the motors can be utilized with confidence. Using your fan motors up to the BkW or brake horsepower ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. GLYCOL COIL DATA* (SI) EDB L/s OF AIR EGT % Glycol Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. kw EDB Entering Dry-Bulb Temperature (C) EGT Entering Glycol Temperature (C) Ldb Leaving Dry-Bulb Temperature (C) *This accessory glycol coil is intended for use with a MINIMUM of 25% glycol solution. It IS NOT intended for use solely with water due to freeze-up conditions and the resulting water damage to the conditioned space. NOTE: Fluid t = 11.1 C. 21

22 Performance data (cont) GLYCOL COIL DATA* (ENGLISH) EDB CFM EGT % Glycol Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. Gpm Ldb Cap. Btuh x 1000 EDB Entering Dry-Bulb Temperature (F) EGT Entering Glycol Temperature (F) Ldb Leaving Dry-Bulb Temperature (F) *This accessory glycol coil is intended for use with a MINIMUM of 25% glycol solution. It IS NOT intended for use solely with water due to freeze-up conditions and the resulting water damage to the conditioned space. NOTE: Fluid t =20F. Electrical data UNIT 50HJQ VOLTAGE VOLTAGE RANGE COMPRESSOR No. 1 No. 2 OUTDOOR FAN MOTOR Min Max RLA LRA RLA LRA Qty FLA (ea) INDOOR FAN MOTOR POWER EXHAUST OPTIONAL ELECTRIC HEAT POWER SUPPLY DISCONNECT SIZING LRA Hp FLA LRA FLA LRA FLA kw MCA MOCP* RLA LRA FLA Full Load Amps HACR Heating, Air Conditioning and Refrigeration LRA Locked Rotor Amps MCA Minimum Circuit Amps MOCP Maximum Overcurrent Protection NEC National Electrical Code (U.S.A. Standard) RLA Rated Load Amps *Fuse or HACR circuit breaker. This is the maximum size permissible; smaller fuse size may be used where conditions permit. NOTE: In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. The Canadian units may be fuse or circuit breaker. 22

23 Typical piping and wiring NEC National Electrical Code (U.S.A. Standard) NOTES: 1. Illustration shown is a general guide only and is not intended for or to include all details for any specific installation. 2. Installation must comply with all applicable codes. 23

24 Typical wiring schematic AND NOTES FOR TYPICAL WIRING SCHEMATIC AHA Adjustable Heat Anticipator BKR W/AT Breaks with Amp Turns C Contactor, Compressor CAP Capacitor CB Circuit Breaker CC Cooling Compensator CH Crankcase Heater CLO Compressor Lockout CLS Cooling Lockout Switch COMP Compressor Motor CT Current Transformer CTD Compressor Time Delay DB Defrost Board DFT Defrost Thermostat DM Damper Motor DR Defrost Relay DU Dummy Terminal EQUIP Equipment FL Fuse Link FLA Load Amps FPT Freeze Protection Thermostat FU Fuse GND Ground HC Heater Contactor HPS High-Pressure Switch HR Heat Relay HTR Heater IFC Indoor-Fan Contactor IFCB Indoor-Fan Circuit Breaker IFM Indoor-Fan Motor IP Internal Protector L Light LPS Low-Pressure Switch LS Limit Switch MAT Mixed-Air Thermostat NEC National Electric Code OAT Outdoor-Air Thermostat OFC Outdoor-Fan Contactor OFM Outdoor Fan Motor OP Overcurrent Protector PL Plug Assembly QT Quadruple Terminal RVR Reversing Valve Relay RVS Reversing Valve Solenoid TB Terminal Block TC Thermostat Cooling TH Thermostat Heating TRAN Transformer Terminal (Marked) Terminal (Unmarked) Terminal Block Splice Factory Wiring Field Wiring Option/Accessory Wiring To Indicate Common Potential Only: Not To Represent Wiring NOTES: 1. Compressor and/or fan motor(s) thermally protected 3 phase motors are protected against primary single phasing conditions. 2. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent. 3. CB1, 2 must trip amps are equal to or less than 156% FLA, IFCB 140%. 4. The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices. Before replacing CLO, check these devices. 5. Jumpers are omitted when unit is equipped with economizer. 6. Number(s) indicates the line location of used contacts. A bracket over (2) numbers signifies a single-pole, double-throw contact. An underlined number signifies a normally-closed contact. Plain (no line) number signifies a normally-open contact. 7. Remove jumper between RC and RH. 24

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26 Controls Sequence of operation Cooling, units without economizer With unit main power on, set thermostat to COOL position and desired room temperature. Set fan switch at AUTO. (on demand) or ON (continuous) position. On a rise in room temperature, cooling contact no. 1 in the thermostat closes. The indoor and outdoor fan motors start. If the 5-minute compressor time-delay (CTD) on the defrost board (DB) is satisfied, then compressor no. 1 contactor is energized and compressor will start. Compressor cycles on demand of the thermostat to satisfy room conditions. Each time the cooling contactor no. 1 opens, the CTD starts the 5-minute delay. With an additional rise in room temperature, cooling contactor no. 2 in the thermostat closes, energizing compressor contactor no. 2. Compressor no. 2 starts and cycles on demand of the thermostat to satisfy the occupied space demands. Cooling, units with economizer Upon a call for cooling, when outdoor ambient temperature is above the temperature control setting, the indoor and outdoor fans and compressor(s) energize. The economizer damper moves to vent position. Upon a first-stage call for cooling, when outdoor ambient temperature is below the temperature control setting, the indoor fan starts and economizer damper modulates to maintain mixed-air temperature. The compressors remain off. Upon a second-stage call for cooling, compressor no. 1 is energized and mechanical cooling is integrated with economizer cooling. Compressor no. 2 is locked out. If the air temperature is below 10 C (50 F), a cooling lockout switch prevents the compressor(s) from running. When supply-air temperature drops below a fixed set point, the economizer damper modulates to maintain the temperature at the fixed set point. A freeze protection thermostat (FPT) is located on the indoor coil. It detects frost build-up and turns off the compressor(s), allowing the coil to clear. Once frost has melted, the compressor can be reenergized. Heating, units without economizer With unit main power on, set thermostat at HEAT position and desired room temperature. Set fan switch at AUTO. (on demand) or ON (continuous) position. On a drop in room temperature, heating contact no. 1 in the thermostat closes, energizing heat relay (HR), reversing valve relay (RVR), reversing valve solenoids (RVS1 and RVS2) and compressor no. 2 contactor. Compressor no. 2 and indoor and outdoor fan motors start. If the 5-minute CTD on the DB is satisfied, then compressor no. 1 contactor is energized and compressor no. 1 will start. On units equipped with electric heat, when additional heat is needed, heating contactor no. 2 in the thermostat closes, energizing W2. Heating, units with economizer With unit main power on, set thermostat at HEAT position and desired room temperature. Set fan switch at AUTO. (on demand) or ON (continuous) position. On a drop in room temperature, heating contact no. 1 in the thermostat closes, energizing heat relay (HR), reversing valve relay (RVR), reversing valve solenoids (RVS1 and RVS2) and compressor no. 2 contactor. Compressor no. 2 and indoor and outdoor fan motors start. If the 5-minute compressor time delay (CTD) on the defrost board (DB) is satisfied, then compressor no. 1 contactor is energized and compressor no. 1 will start. The outdoor-air damper stays at vent position while the indoor fan is operating. On units equipped with electric heat, when additional heat is needed, heating contactor no. 2 in the thermostat closes, energizing W2. Defrost cycle When the temperature of the outdoor coil drops below 3 C (28 F) as sensed by the defrost thermostat (DFT1 or DFT2), the defrost timer starts. At the end of a timed period (field set at 30, 50, or 90 minutes), the defrost cycle will begin. The defrost board energizes terminals O and W2, energizes the defrost relay (DR), deenergizes the reversing valve solenoids (RVS1 and RVS2), and energizes the electric heat. The outdoor-fan motor will stop. The unit continues to defrost either until the coil temperature as measured by DFT1 or DFT2 reaches 18 C (65 F), or until unit completes a 10-minute defrost cycle. During the defrost mode, when a circuit defrosts, RVS will oscillate between heating and cooling modes until defrost mode is complete. This will prevent the head pressure from getting too high. At the end of the defrost cycle, the electric heaters (if applicable) will be deenergized, the reversing valve solenoids will be energized, and the outdoor fans will start. Automatic changeover When the system selection switch is set at AUTO. position, unit automatically changes from heating operation to cooling operation when the temperature of the conditioned space rises to the cooling lever setting. When the temperature of the conditioned space falls to the heating lever setting, unit automatically changes from cooling to heating operation (with a 1.7 C [3 F] deadband in between). Continuous air circulation Turn unit power on. Set system control at OFF position. Set fan switch at ON position. The indoor-fan contactor is energized through the thermostat switch and the indoor fan runs continuously. Cycle-LOC protection If unit operation is interrupted by an open high-pressure switch, low-pressure switch, indoor coil freezestat, or by compressor internal line-break device (overcurrent or overtemperature), and compressor is calling for either cooling or heating, Cycle-LOC protection device simultaneously locks out unit and lights a warning light on the thermostat. Restart the unit by manually turning thermostat to OFF and then to ON position. If any of the protective devices opens again, the unit continues to lock out until corrective action is taken. NOTE: If the unit fails to operate due to compressor overcurrent condition, restart by manually resetting circuit breakers at the unit. Restart cannot be accomplished at the room thermostat. Emergency heat If compressor is inoperative due to a tripped safety device (high or low pressure, indoor coil freezestat, overcurrent, or overtemperature), the Cycle-LOC device locks out the compressor and lights a warning light on the room thermostat. When the switch is on (thermostat is set to the EM HT position), compressor circuit and outdoor thermostats are bypassed, and the second stage of thermostat energizes the indoor blower and the electric resistance heaters. 26