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Summary of Contents for Johnson Controls VSCS Series
- Page 1 High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps A Generation Installation, Operation, and Maintenance Manual Installation Guide Form Number: 145.18-IOM1 (1220) Issue date: 2020-12-10 Supersedes: 145.18-IOM1 (620) Johnson Controls...
- Page 2 High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 3: Table Of Contents
For units with NPSH valve connection and hose sets................. 46 For units with NPT style (tapered pipe thread) valve connection and hoses........46 Start-up and performance checklist....................52 High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 4 Heating and cooling data record sheet..................68 Vertical stack water loop verification....................69 Vertical stacked water source heat pump heating and cooling data record sheet....70 Limited warranty..........................72 R-410A quick reference guide......................73 High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 5: General Safety Guidelines
Note: Highlights additional information useful to the technician in completing the work being performed properly. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 6: Changeability Of This Document
Refrigerant charge data updated for each model in Table 1 - High Table 1 February 2020 Series Physical Data Start-up and performance Start-up Checklist added February 2020 checklist High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 7: Associated Literature
Associated literature Manual description Form number Vertical Stacked Heat Pump Start-Up and Performance Checklist 145.18-CL1 Vertical Stacked Water Source Heat Pump Heating and Cooling Data 145.18-CL2 Record Sheet High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 8: Cabinet Nomenclature
Cabinet nomenclature High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 9: Chassis Nomenclature
Chassis nomenclature High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 10: Installation
You may also refer to the unit rating plate for a contact name. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 11: Shipping
• Keep the cabinet sealed with the shipping materials until all plastering, painting, and construction work is complete. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 12 Do NOT install units in a flammable environment due to the danger of an explosion. WARNING Safety guards, shields, barriers, covers, and protective devices must not be removed while the compressor/unit is operating. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 13: Rigging
Use rigging and lifting techniques that keep the unit stable and level. Keep clear of unit when lifted. Cabinet riser installation CAUTION Do NOT use the risers to lift or move the cabinets. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 14: Placing The Cabinet
Raise the cabinet upright. Lower the risers through the floor cutout, aligning the risers into the swaged section of the unit on the floor below. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 15 Center the riser stub-out in cabinet opening to allow for expansion and contraction. Riser stub-outs must not contact on any sheet metal opening. Otherwise damage can occur to stub-outs, resulting in water leaks and property damage. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 16 If the temperature range of the system exceeds the allowed expansion and contraction limits (1-1/2 inches maximum), the installing contractor must make riser compensation provisions. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 17 Note: *Nominal capacity is calculated in accordance with ARI/ISO Standard 13256-1 for water loop application. **Cabinet weight is approximate and does not include the weight of the risers. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 18 RA flange width (C) 09-12 15-24 30-36 Note: Supply, return, and condensate riser openings are pre-punched on all sides and field convertible. Cut tabs to remove the knock-out. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 19 Condensate P-trap is accessible from the front by removing the bottom cover plate. Riser and shut-off location is measured from base of cabinet and does not include the stand height. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 20 Figure 4: Cabinet riser dimensions Note: Riser shut-off valve is measured from base of cabinet and does not include the stand height. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 21: Riser Loop
Tighten by hand the screw connections to the male NPSH or JIC fitting on the shut-off valve. Hold the ferrule stationary when tightening. Tighten using a backup wrench a 1/4 turn further. Do not overtighten. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 22 Always use a back-up wrench when tightening hoses to valves. Otherwise, valve solder joint may fail, leading to property damage or serious injury. Table 4: Chassis hoses Chassis model Hose type 09–18 1/2-inch NPSH or JIC female-female 24–36 3/4-inch JIC female-female High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 23 Figure 5: Standard factory supplied npsh hose kits and risers Figure 6: Optional field supplied risers with factory supplied NPSH hose kits and shut-off valves High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 24 Figure 7: Standard factory supplied JIC hose kits and risers Figure 8: Optional field supplied risers with factory-supplied JIC hose kits and shut-off valves High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 25: Electrical Wiring
Verify that the available unit power supply is compatible with the unit’s nameplate rating. Ensure the breaker is properly sized as per the nameplate. The line voltage supply enters through the right side of the cabinet at the 7/8-inch power entrance knock-out. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 26: Field-Installed Low Voltage Wiring
Note: Check all loads and conductors for grounds, shorts, or miswiring. Do not run the low voltage wiring in the same conduit with the high voltage power wiring. Table 5: Typical wire connections Recommended wire size (gauge) Maximum low voltage wire length (feet) High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 27: Optional Surface Mount Thermostat Connection Wiring
Using a plastic bushing to pass the harness inside electrical box to the factory wired mating Molex harness (see Figure ). The thermostat pigtail Molex harness ships loose for field wiring to the thermostat terminals. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 28: Optional Ada Door Mounted Thermostat
RA panel door at a height of 48 inches from the base of the cabinet. Unit is supplied with a custom RA door panel with thermostat mounting holes, unit High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 29: Ec Motor (Ecm) Continuous Fan
RA panels with optional key locks require the key locks to be field installed to the slot in the panel door. ADA RA door panels come with an opening and pilot holes mounting a thermostat. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 30 1/2 MAX 24/30/36 29 3/4 23 1/4 27 3/4 27 1/4 31 1/4 ± 1/8 MIN 27 MIN 31 1/2 MAX 1/2 MAX Note: All dimensions are in inches. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 31 Note: For maximum return airflow, the flush mounted acoustic panel must be centered vertically and horizontally over the RA opening of the cabinet. SA duct collar extensions may be required to prevent short cycling. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 32 Acoustic panel is powder coated in appliance white Acoustic panel can be installed on the right hand side or left hand side. See Figure for additional RA panel and cabinet installation information. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 33: Supply Air (Sa) Ductwork
Manufacturer supplied grilles have a clearance of a 1/4 inch around the perimeter to fit inside the unit supply flange. Other grille manufacturers could have different clearances that should be verified. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 34: Top Discharge Supply Air
Table 6. To calculate the face velocity at the supply grille, take the FPM from Table 7 and divide by the supply grille area factor. Figure 17: Supply grille with volume damper and 1/8-inch neoprene tape applied to perimeter High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 35 Figure 18: Unit mounted supply grille installation Note: All dimensions are in inches and typical for factory supplied grilles only. Check dimensions for field-supplied grilles because dimensions can be different. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 36 Openings marked Not Available result in face velocities outside the recommended 300– 500 FPM range. Hi-static blower option or single horizontal discharge openings with unit mounted supply grille are not recommended. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 37: Top Mounted Fresh Air Intake
The fresh air duct inside the unit is insulated to protect the unit from condensation in the event of high humidity air. However excessively moist fresh air over prolonged periods can result in condensate inside unit or closet. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 38: Top Mounted Fresh Air Intake With Motorized Damper
Remove the seven fasteners holding the damper plate (see Figure ). Drop the plate and disconnect the quick-connect terminals from the harness. Remove the red cover from the actuator body (see Figure ). Figure 19: Damper plate fasteners High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 39 Figure 20: Remove the red cover Figure 21: Position black cover High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 40: System Flushing And Cleaning
Do not allow the system to overflow. Close the air vents, and start the circulating pump. Ensure that all air is bled from the system by cracking each air vent. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 41: Cleaning The System
The customer is responsible for completing adequate water loop maintenance over the lifespan of the units. Otherwise, damage to the units may occur. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 42 Figure 22: System flushing and cleaning High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 43 Figure 23: Fresh air opening without motorized damper – left and right hand unit shown High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 44 Figure 24: Fresh air opening with motorized damper – left and right hand unit shown High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 45: Chassis Installation
Remove the inner service panel from the cabinet, and inspect the interior compartment for debris. Clear all debris and vacuum construction dust from the cabinet. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 46: For Units With Npsh Valve Connection And Hose Sets
Insert the chassis midway into the opening of the cabinet. Lower the rear of the chassis until the base of the chassis touches the formed mounting rails in the cabinet drain pan (see Figure 27). High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 47 Figure 25: Lift the chassis front Figure 26: Tilt the chassis High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 48 Pivot the chassis base on the front edge of the drain pan rails. Before fully inserting the chassis, ensure the wiring harness and water hoses cannot be pinched between the chassis and cabinet (see Figure 28). High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 49 Figure 28: Pivot the chassis Figure 29: Slide the chassis High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 50 (see Figure 30). Complete the electrical connections to the chassis using the two quick-connect mating plugs. The unit-mounted plug ends are located on the bottom of the control box. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 51 15. Install the RA panel into the drywall opening if not already installed. Refer to Acoustic return air (RA) panel. Secure the panel into the drywall with six screws. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 52: Start-Up And Performance Checklist
Start-up and performance checklist High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 53 High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 54: Operation
Reduce the temperature control setting until the compressor and supply fan energize, with the following results: a. Water temperature leaving the heat exchanger is warmer than the entering water temperature (EWT) (approximately 9.0–12.0°F). b. The blower operation is smooth. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 55: System Loop Temperature
Multi-speed direct drive motors are used in all units as standard. Permanent split capacitor (PSC) fan motors have a minimum of three selectable speeds. EC motors (ECMs) have five speeds, however only two speeds are recommended and available for selection. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 56: Refrigerant Charge Adjustment
665 650 635 615 595 575 555 540 520 500 475 450 420 395 370 340 High 580 570 560 550 535 520 505 485 465 445 425 400 375 350 High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 57 760 726 693 667 642 615 587 574 561 529 497 469 441 412 High High 891 863 835 809 784 757 730 689 648 601 554 518 482 446 408 High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 58: Unit Controls
Freeze protection switch (unit shutdown on low water temperature) Condensate overflow switch • The unit operates with conventional thermostat designs and has a low voltage terminal strip for easy hook-up. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 59: Sequence Of Operation
Note: If the unit must be reset more than twice on consecutive operating cycles, check the unit for a dirty filter, abnormal EWT, inadequate or excessive water flow, or refrigerant circuit malfunction. If the unit continues to cutout, contact a trained service technician. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 60: Operation Errors
A suction line freeze-stat to protect against low leaving water temperatures (LWTs) (opens at 34.0°F and resets at 48.0°F). A high pressure limit switch to protect against excessive discharge pressures (opens at 600 psig ± 25 psig). High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 61: Random Start
When this button is pressed and released one time within 5 seconds, any ASCD is bypassed for one cycle. Comm setup If the board is to be networked with other units, this button is used to set the network address. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 62: Communication
Coaxial freeze thermostat - compressor lockout Note: * These flash codes do not represent alarms. Communication ™ The communication protocol is Modbus using the RTU method of packet framing at 19200-baud rate. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 63: Maintenance
If the coils appear dirty, clean them using mild detergent or a commercial coil- cleaning agent. Inspect hoses, valves, and connections for water leaks. For hose connection leaks, inspect rubber hose gaskets and replace them as required. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 64: Appendix
Appendix Figure 31: PSC motor wiring diagram High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 65 Figure 32: ECM wiring diagram High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 66 Figure 33: continuous fan with ECM wiring diagram High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
- Page 67 Figure 34: Motorized damper ECM wiring diagram High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 68: Heating And Cooling Data Record Sheet
Heating and cooling data record sheet Figure 35: ECM with 3 speed fan motor High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 69: Vertical Stack Water Loop Verification
10. Vibration isolators properly installed and adjusted. 11. Flexible connections installed properly. Boiler All operating and safety settings for temperature and pressure are correct. Pressure relief valve functional. Boiler started and operating properly. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... -
Page 70: Vertical Stacked Water Source Heat Pump Heating And Cooling Data Record Sheet
All operating and safety settings for temperature and pressure are correct. Chiller and condenser started and operating correctly. Vertical stacked water source heat pump heating and cooling data record sheet High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 71 NOTES High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls...
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Page 72: Limited Warranty
Limited Warranty. When a defective part can be repaired or replaced, Johnson Controls shall not be obligated to repair the entire unit or any part thereof other than the defective part. -
Page 73: R-410A Quick Reference Guide
Never open the system to atmosphere when under vacuum. • If the system must be opened for service, evacuate the system, then break the vacuum with dry nitrogen and replace the filter driers. High Efficiency VSCS Series Vertical Stacked Water Source Heat Pumps Johnson Controls... - Page 74 © 2020 Johnson Controls. All rights reserved. Subject to change without notice. 100 JCI Way, York, Pennsylvania USA 17406-8469. Johnson Controls...
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