Johnson Controls JRC Series Installation Operation & Maintenance Download Page 4

WAT E R - S O U R C E   H E AT   P U M P S

JRC-Series

R e v. :   D e c e m b e r   8 ,   2 0 2 1

I n s t a l l a t i o n ,   O p e r a t i o n ,   M a i n t e n a n c e

4

General Information

Safety

Warnings, cautions, and notices appear throughout this 

manual. Read these items carefully before attempting any 

installation, service, or troubleshooting of the equipment. 

DANGER:

 Indicates an immediate hazardous situation, 

which if not avoided will result in death or serious injury. 

DANGER labels on unit access panels must be observed.

WARNING:

 Indicates a potentially hazardous situation, 

which if not avoided could result in death or serious injury.

CAUTION:

 Indicates a potentially hazardous situation or 

an unsafe practice, which if not avoided could result in 

minor or moderate injury or product or property damage.

NOTICE:

 Notification of installation, operation, or 

maintenance information, which is important, but which is 

not hazard-related.

WARNING!

 To avoid the release of refrigerant into the 

atmosphere, the refrigerant circuit of this unit must be 

serviced only by technicians who meet local, state, and 

federal proficiency requirements.

 

WARNING!

 

 

WARNING!

 

 

WARNING!

 

WARNING! 

The installation of water-source heat pumps and 

all associated components, parts, and accessories which 

make up the installation shall be in accordance with the 

regulations of ALL authorities having jurisdiction and MUST 

conform to all applicable codes. It is the responsibility of 

the installing contractor to determine and comply with ALL 

applicable codes and regulations.

WARNING! 

This appliance is not intended for use by persons 

(including children) with reduced physical, sensory, or mental 

capabilities, or lack of experience and knowledge, unless 

they have been given supervision or instruction concerning 

use of the appliance by a person responsible for their safety.

WARNING! 

All refrigerant discharged from this unit must 

be recovered WITHOUT EXCEPTION. Technicians must 

follow industry accepted guidelines and all local, state, and 

federal statutes for the recovery and disposal of refrigerants. 

If a compressor is removed from this unit, refrigerant circuit 

oil will remain in the compressor. To avoid leakage of 

compressor oil, refrigerant lines of the compressor must be 

sealed after it is removed.

CAUTION! 

To avoid equipment damage, DO NOT use 

these units as a source of heating or cooling during the 

construction process. The mechanical components and filters 

can quickly become clogged with construction dirt and debris, 

which may cause system damage and void product warranty.

 

WARNING!

 

 

CAUTION!

 

WARNING!

 This product can expose you to chemicals 

including formaldehyde, which is known to the state of 

California to cause cancer. For more information, go to 

www.P65Warnings.ca.gov.

 

WARNING!

 

Summary of Contents for JRC Series

Page 1: ...ter Source Heat Pumps Installation Operation Maintenance Supersedes 14805 NOM1 0521 Form 14805 NOM1 1221 97B0035N10 Issue Date December 8 2021 JRC Series Water Source Heat Pump MODELS JRC 0 75 1 5 Ton...

Page 2: ...ons 13 Ground Water Heat Pump Applications 14 Water Quality Standards 16 Electrical Line Voltage 20 Electrical 21 JRC Series Wiring Diagram Matrix 24 CXM Controls 25 DXM Controls 26 Safety Features CX...

Page 3: ...Model Type Unit Size None Motorized Water Valve Autoflow 2 25 Gpm Ton Autoflow 3 0 Gpm Ton Motorized Water Valve Afr 2 25 Motorized Water Valve Afr 3 0 Secondary Circulation Pump Water Circuit Options...

Page 4: ...ce with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes It is the responsibility of the installing contractor to determine and comply with ALL applicabl...

Page 5: ...he system components Remove any dirt or debris found in or on these components Pre Installation Installation Operation and Maintenance instructions are provided with each unit Horizontal equipment is...

Page 6: ...ze Bottom Return in mm 1 10 x 30 x 1 254 x 762 x 25 1 10 x 36 x 1 254 x 914 x 25 Front Return In mm 1 7 x 29 5 x 1 8 178 x 749 x 3 2 1 7 x 35 5 x 1 8 178 x 902 x 3 2 Unit Size Bottom Return Std 5 Base...

Page 7: ...ecure the subbase in place 6 Remove subbase shipping support bracket and discard 7 Make all necessary electrical connections as described in the Electrical Wiring section of this manual Consult the wi...

Page 8: ...tly Horizontal runs of condensate hose should be pitched downward 1 4 inch minimum for every foot 10 mm per 46 cm of hose Avoid low points because dirt collects in these areas and may cause blockage I...

Page 9: ...tional Motorized Water Valve 1 75 44 Out In Water Connections 1 2 FPT 2 25 57 In Out 11 25 286 2 00 51 1 50 38 8 00 Min 203 2 25 57 5 8 15 9 ID Vinyl Hose 8 00 Min 203 Water Connections 1 2 FPT 11 25...

Page 10: ...D Vinyl Hose Optional Motorized Water Valve Optional Autoflow Valve Water Connections 5 8 15 9 OD Copper 1 2 FPT or 1 2 MPT Optional isconnect Box unted to cabinet not chassis Optional Motorized Water...

Page 11: ...e or pipe joint compound that is applied Maximum allowable torque for brass fittings is 30 ft lbs 41 N m If a torque wrench is not available tighten finger tight plus one quarter turn Tighten steel fi...

Page 12: ...enoid valve for use in variable speed pumping systems may also be included in the hose kit The piping system should be flushed to remove dirt piping chips and other foreign material prior to operation...

Page 13: ...to assist the contractor in installing trouble free ground loops These instructions are recommendations only State provincial and local codes MUST be followed and installation MUST conform to ALL app...

Page 14: ...the pH 7 5 and the calcium hardness is less than 100 ppm scaling potential is low If this method yields numbers out of range of those listed the Ryznar Stability and WARNING Polyolester Oil commonly...

Page 15: ...re is constantly varying two pressure gauges may be needed Adjust the valve until the desired flow of 1 5 to 2 gpm per ton 2 0 to 2 6 l m per kW is achieved A second method of flow control requires a...

Page 16: ...l l e c a i r e t c a B Sulfate reducing 0 0 0 0 L m s l l e c a i r e t c a b Suspended Solids 0 1 0 1 0 1 0 1 m p p S S T Earth Ground Resistance 0 s m h O Consult NEC local electrical codes for gro...

Page 17: ...ed 7 If water temperature is expected to fall below 40 F antifreeze is required Refer to the heat pump IOM for the correct solution ratios to prevent freezing Hydrogen Sulfide has an odor of rotten eg...

Page 18: ...esistance measured should be zero Ohms The NEC allows a resistance to ground up to 20 Ohms Any resistance above zero indicates a poor earth ground which may be the result of a hot neutral line or that...

Page 19: ...If higher than 500mV electrolysis will occur and corrosion will result If voltage is measured the cause is a high resistance earth ground or current on the neutral conductor Remedial measures should...

Page 20: ...open the power supply disconnect switch and secure it in an open position during installation CAUTION Use only copper conductors for field installed electrical wiring Unit terminals are not designed...

Page 21: ...0 5 N A 4 20 5 13 15 0 8 5 00 5 93 15 E 265 60 1 239 292 3 5 22 0 0 4 N A 3 90 4 78 15 0 7 4 60 5 48 15 JRC12 A 115 60 1 104 126 9 5 50 0 1 0 N A 10 50 12 88 20 1 4 11 90 14 28 20 G 208 230 60 1 197 2...

Page 22: ...ld supplied and field installed B only required with systems employing remote mounted thermostats Figure 3 Typical Field Installed Wiring WARNING To avoid possible injury or death due to electrical sh...

Page 23: ...e 18 AWG wire Wire the appropriate thermostat as shown in Figure 7 to the low voltage terminal strip on the CXM or DXM control board Practically any heat pump thermostat will work with JRC WSHP units...

Page 24: ...ard JRC DIGIT 8 L N CXM w MPC JRC DIGIT 8 M P DXM w MPC JRC DIGIT 8 D S DXM Standard S1 S1 S1 S1 S2 S2 1 2 3 4 5 OFF ON 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 OFF ON OFF ON OFF ON O...

Page 25: ...ted to R Clipped AL2 dry contact no connection DIP Switches Note In the following field configuration options DIP switches should only be changed when power is removed from the CXM control DIP switch...

Page 26: ...e control is attempting a retry of a fault the status LED will slow flash slow flash one flash every 2 seconds to indicate the control is in the process of retrying Field Configuration Options Note In...

Page 27: ...able 7c Accessory DIP Switch Settings 1 3 Thermostat type heat pump or heat cool DIP 1 3 provides selection of thermostat type Heat pump or heat cool thermostats can be selected When in heat cool mode...

Page 28: ...he compressor contactor coil The high pressure fault recognition is immediate does not delay for 30 continuous seconds before de energizing the compressor High pressure lockout code 2 Example 2 quick...

Page 29: ...mode and the LT2 sensor is colder than the LT1 sensor Swapped LT1 LT2 thermistor code 9 ESD DXM only The ESD Emergency Shut Down mode can be enabled from an external common signal to termi nal ESD to...

Page 30: ...30 120 1 49 20 90 6 7 32 Requires optional insulation package when operating below the dew point Requires antifreeze optional insulation package and jumper clipped UNIT OPERATING LIMITS All JRC Model...

Page 31: ...f water or other equivalent approved cleaning agent Reset the boiler to raise the loop temperature to 100 F 38 C Circulate the solution for a minimum of 8 to 24 hours At the end of this period shut of...

Page 32: ...promotes longevity of hoses and fittings see Table 3 System flushing Verify that all hoses are connected end to end when flushing to insure that debris bypasses the unit heat exchanger water valves an...

Page 33: ...urn thermostat to OFF position A hissing noise indicates proper functioning of the reversing valve 6 Allow five 5 minutes between tests for pressure to equalize before beginning heating test a Adjust...

Page 34: ...57 8 13 8 13 8 13 9 14 8 13 7 12 16 18 12 14 8 10 18 24 18 24 18 24 164 174 165 175 167 177 372 392 375 395 379 399 17 22 18 23 19 24 13 18 13 18 13 18 14 5 16 5 11 2 13 2 7 9 9 9 35 41 35 41 36 42 11...

Page 35: ...9 14 9 14 9 14 11 16 9 14 6 11 15 8 17 8 14 9 16 9 14 16 18 24 18 24 18 24 164 174 165 175 167 177 372 392 375 395 379 399 17 22 18 23 19 24 13 18 13 18 13 18 14 5 16 5 11 2 13 2 7 9 9 9 35 41 35 41 3...

Page 36: ...and data entries before the system is put into full operation Temperatures F or C Antifreeze __________________ Pressures PSIG or kPa Type __________________ Cooling Mode Heating Mode Return Air Tempe...

Page 37: ...erating conditions and be replaced when necessary Units should never be operated without a filter Washable high efficiency electrostatic filters when dirty can exhibit a very high pressure drop for th...

Page 38: ...e of unit toward outlet Poor venting Check vent location X Moisture on sensor Check for moisture shorting to air coil X X Plugged air filter Replace air filter x X Restricted Return Air Flow Find and...

Page 39: ...ck fan motor operation and air flow restrictions Too high of external static Check static vs blower table X Reduced or no water flow in cooling Check pump operation or valve operation setting Check wa...

Page 40: ...HWG HEATING CYCLE ANALYSIS PSI SAT PSI SAT F F AIR COIL F F FP2 HEATING LIQUID LINE F EXPANSION VALVE AIR COIL F F PSI SAT PSI SAT F F F F WATER IN WATER OUT PSI PSI F F WATER IN WATER OUT PSI PSI Use...

Page 41: ...JRC Series Rev Decem b er 8 2021 TH E SMART SOLUTION FOR ENERGY EFFICI E N CY Installation Operation Maintenance 41 Notes...

Page 42: ...WATE R SOURCE HEAT PUMPS JRC Series Rev Decemb er 8 2021 Installation Operation Maintenance 42 Notes...

Page 43: ...JRC Series Rev Decem b er 8 2021 TH E SMART SOLUTION FOR ENERGY EFFICI E N CY Installation Operation Maintenance 43 Notes...

Page 44: ...o Subordinate 08 19 20 Created Johnson Controls works continually to improve its products As a result the design and specifications of each product at the time for order may be changed without notice...

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