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Issue: 01.05.2019                                                                                                                                                    Page 21                                                                                   

Service & Maintenance 

 

 
 

 

 

 
The condensing units are designed to give long life 
operation with minimum maintenance. However, they 
should be routinely checked and the following service 
schedule is recommended under normal circumstances: 
 
The removal of the top, side and front panels ensures that 
all parts are accessible. 
 

1. Compressor – Inspect at regular intervals 

••••

 

Check for refrigerant leaks on all joints and fittings. 

••••

 

Check mountings for tightness and wear. 

••••

 

Check operation of crankcase heater. 

••••

 

Check electrical connections. 

••••

 

Ensure that no abnormal noise or vibration is detected 
during test run. 

••••

 

Check the compressor oil levels and top up if required.  
The oil level should be ½ to ¾ way up the sight glass 
(where fitted). 

 
2. Condenser Fan Motor & Blade – Clean and inspect at 
regular intervals 

••••

 

Check for abnormal noise, vibration and fan imbalance. 

••••

 

Ensure that the fan motor is clean and spins freely. 

••••

 

Check that the condenser fan blade is clean and free 
from restriction and damage/imbalance. 

••••

 

Note:

 The fan motor is pre-lubricated and factory sealed 

so no maintenance is necessary. 

 

3. Microchannel Condenser Coil – Clean and inspect at 
regular intervals. 

 

Remove surface dirt, leaves etc. with a vacuum cleaner 
(preferably with a brush or other soft attachment rather 
than a metal tube), compressed air blown from the 
inside out, and/or a soft bristle (not wire!) brush. Do not 
impact or scrape the coil with the vacuum tube, air 
nozzle, etc. 

 

Do not use any chemicals (including those advertised as 
coil cleaners) to wash micro channel heat exchangers. 
They can cause corrosion. 

Rinse only. 

Hose the MCHE off 

gently, preferably from the inside out and top to bottom, 
running the water thru every fin passage until it comes 
out clean. Micro channels fins are stronger than 
traditional tube & fin coil fins but still need to be handled 
with care. Do not bang the hose into the coil. We 
recommend putting your thumb over the end of the 
hose rather than using a nozzle end because the 
resulting spray is gentler and the possibility for impact 
damage is less. 

 
 
 

 

 

 

Micro channel heat exchangers, because of their fin 
geometry, tend to retain water more than traditional fin 
& tube coils. Depending on the specific design and 
installation of your coil, it may be beneficial to blow or 
vacuum out the rinse water from your unit to speed 
drying and prevent pooling. 
 

4.

 

Compact Brazed Heat Exchanger (BPHE)  

** For EVI Units ONLY  

 

Any soldering process done on the heat exchanger needs 
to be brazed with minimum 45% silver solder at 
maximum 450°C (840°F) when soft soldering and 450-
800°C (840-1470°F) when hard soldering. 

 

 

Do not direct flame at BPHE and use wet rag to avoid 
overheating of BPHE. 

 

 
5. Controls 

 

Check settings and operation of pressure switches.

 

 

Check overload setting.

 

 

Check fan speed control setting and operation

.

 

 
 
6. Power Supply – Inspect at regular intervals.

 

••••

 

Check the running current and voltage for the 
condensing unit. 

••••

 

Check the electrical wiring and tighten the wires onto the 
terminal blocks if necessary. 

 
 
7. Refrigerant Charge 

 

Check the refrigerant charge by ensuring that the system 
is operating correctly, the pressures are as expected and 
that the liquid line sight glass shows a full bore of liquid 
refrigerant. 

 

Carry out a full leak test. 

 
 

8. Compressor replacement (rotalock connections) 
 

 

The rotalock connections as used on some 
compressor models are factory sealed with Loctite 
554 thread sealant. If the rotalock connections 
need to be disassembled (e.g. compressor change), 
then they should be thoroughly cleaned and Loctite 
554 reapplied before reassembly. In case of 
difficulty undoing the connections due to the 
sealant, apply heat to the rotalock using a heat gun 
for several minutes and then loosen using hand 
tools whilst hot. Replacement of the ‘O’ ring seal 
may be required. Please see recommended torque 
tightening values on page 22. 

 

 

 
 
 
 
 

 

Important Note: 

 

 

Warning! – Disconnect the mains electrical 
supply before servicing or opening the unit. 

Содержание JEHR-0050-B1-M-1

Страница 1: ...Issue 01 05 2019 Page 1 Contents COMMERCIAL CONDENSING UNITS INSTALLATION MANUAL V3 FUSION FUSION SCROLL Commercial Condensing Units Medium Low Temperature Applications ISSUE 01 05 2019 V3 ...

Страница 2: ...ng 7 12 Wiring Diagrams 13 20 Service Maintenance 21 22 F Gas Information 23 Nomenclature JEH R 0140 B 2 M 1 J E Hall International Unit Series R Reciprocating S Scroll M Medium Temperature L Low Temperature Approximate HP 0140 1 4hp Power Supply 1 230V 1Ph 50Hz 3 400V 3Ph 50Hz Unit Generation EVI Vapour Injection Unit ...

Страница 3: ...20 14 4 28 0 118 0 2 1 8 8 73 13 6 8500 3 4 1 3 8 226 43 JEHR 0115 B1 L 1 n c 1 10 n c n c n a n a 1 05 CAJ2446Z 4 55 0 48 2 8 8 2 30 0 1 0 2 0 44 2 4 1250 3 8 1 2 59 27 JEHR 0135 B1 L 1 n c 1 04 n c n c n a n a 0 98 CAJ2464Z 6 00 0 48 4 6 10 0 40 0 1 0 2 0 44 2 4 1250 3 8 1 2 61 27 JEHR 0175 B2 L 1 n c 1 00 n c n c n c n c 1 07 NTZ048 5VM B 8 40 0 95 0 50 4 5 11 0 37 0 1 0 6 0 51 4 5 2700 3 8 5 8...

Страница 4: ...itted at all times Use of the units outside of the design conditions and the application for which the units were intended may be unsafe and be detrimental to the units regardless of short or long term operation The units are not designed to withstand loads or stresses from other equipment or personnel Such extraneous loads or stress may cause failure leak injury Installation Unit location In orde...

Страница 5: ... device Careful attention should be paid to sizing of liquid lines on large risers maximum 6m In some circumstances a suction accumulator not supplied may be required It offers protection against refrigerant flood back during operation and also against off cycle migration by adding internal free volume to the low side of the system Tests must be conducted to ensure the amount of off cycle migratio...

Страница 6: ...charge of oxygen free nitrogen Once the pipework installation is complete it should be pressure tested prior to evacuation to test for leaks A pressure leak test should be carried out using oxygen free nitrogen OFN NEVER USE OXYGEN FOR PRESSURE TESTING SYSTEMS A calibrated nitrogen pressure regulator must always be used Before starting any pressure testing ensure the area surrounding the system is...

Страница 7: ...hecks Before starting the condensing unit the following checks should be carried out as a minimum Check electrical supply is correct and all connections are sound All moving parts are free and guards fitted Compressor oil level satisfactory Initial settings for safety switches and fan speed control Overload set correctly All valves in correct operating position Initial refrigerant charge Crankcase...

Страница 8: ...sioning and during service maintenance visits For further information including recommended torque tightening values please refer to Service Maintenance section on pages 21 22 Vacuum operation Do not operate scroll compressors in a vacuum condition as this will cause the scrolls to overheat very quickly causing premature failure System charge Ensure an adequate liquid charge has been introduced to...

Страница 9: ...its are mounted with discharge thermostat cut off 125 C cut in 90 C to protect the compressor For other unit models it is recommended to install the discharge thermostat if operating in extreme condition low evaporating and high ambient temperature Compressor Refrigerant S1 S2 Max HP Set Compressor MTZ NTZ MTZ Refrigerant R404A R407A R407F R448A R449A R452A R404A R452A R134a S2 Max HP Set 18 bar C...

Страница 10: ...gram for electrical connections Class II category transformer is required for 24VAC power supply Do not connect any EXD HP1 input to main voltage as it will permanently damage the controller When connecting wires of expansion valve and pressure sensor consider color coding as follow 1 EXM BR BROWN BL BLUE OR ORANGE YE YELLOW WH WHITE 2 PT5 BN BROWN WH WHITE Display keypad unit LEDs and button func...

Страница 11: ...mmissioning Manual mode operation Warning All alarms are disabled during manual control We do not recommend unattended operation of system during manual control Manual alarm reset clearing functional alarms except hardware error ...

Страница 12: ...g EXD HP1 Error Alarm handling Note When multiple alarms occur the highest priority alarm is displayed until being cleared Then the next highest alarm is displayed until all alarms are cleared Only then will parameters will be shown again ...

Страница 13: ...Issue 01 05 2019 Page 13 Wiring Diagrams JEHR 0050 B1 M 1 JEHR 0067 B1 M 1 JEHR 0100 B1 M 1 JEHR 0113 B1 M 1 ...

Страница 14: ...Issue 01 05 2019 Page 14 Wiring Diagrams JEHR 0115 B1 L 1 JEHR 0135 B1 L 1 JEHR 0140 B2 M 1 ...

Страница 15: ...Issue 01 05 2019 Page 15 Wiring Diagrams JEHR 0140 B2 M 3 JEHR 0150 B2 M 1 JEHR 0175 B2 L 1 JEHR 0225 B2 L 1 ...

Страница 16: ...Issue 01 05 2019 Page 16 Wiring Diagrams JEHR 0150 B2 M 3 JEHR 0175 B2 L 3 JEHR 0225 B2 L 3 JEHS 0200 B2 M 1 JEHS 0250 B2 M 1 JEHS 0300 B2 M 1 ...

Страница 17: ...Issue 01 05 2019 Page 17 Wiring Diagrams JEHS 0200 B2 M 3 JEHS 0250 B2 M 3 JEHS 0300 B2 M 3 JEHS 0200 B2 L 3 JEHS 0300 B2 L 3 JEHS 0350 B3 M 1 JEHS 0400 B3 M 1 ...

Страница 18: ...e 01 05 2019 Page 18 Wiring Diagrams JEHS 0350 B3 M 3 JEHS 0400 B3 M 3 JEHS 0500 B3 M 4 JEHS 0600 B3 M 3 JEHS 0680 B3 M 4 JEHS 0400 B3 L 3 JEHS 0500 B3 L 3 JEHS 0600 B3 L 3 JEHS 0800 B4 M 3 JEHS 1000 B4 M 3 ...

Страница 19: ...Issue 01 05 2019 Page 19 Wiring Diagrams JEHS 0750 B4 L 3 JEHS 0950 B4 L 3 EVI ...

Страница 20: ...Issue 01 05 2019 Page 20 Wiring Diagrams JEHS 1150 B4 L 3 EVI ...

Страница 21: ...he coil We recommend putting your thumb over the end of the hose rather than using a nozzle end because the resulting spray is gentler and the possibility for impact damage is less Micro channel heat exchangers because of their fin geometry tend to retain water more than traditional fin tube coils Depending on the specific design and installation of your coil it may be beneficial to blow or vacuum...

Страница 22: ... ZB15KQE TFD 558 JEHS 0250 B2 M 1 ZB19KQE PFJ 558 JEHS 0250 B2 M 3 ZB19KQE TFD 558 JEHS 0300 B2 M 1 ZB21KQE PFJ 558 JEHS 0300 B2 M 3 ZB21KQE TFD 558 JEHS 0350 B3 M 1 ZB26KQE PFJ 558 JEHS 0350 B3 M 3 ZB26KQE TFD 558 JEHS 0400 B3 M 1 ZB29KQE PFJ 558 JEHS 0400 B3 M 3 ZB29KQE TFD 558 JEHS 0500 B3 M 3 ZB38KQE TFD 558 JEHS 0600 B3 M 3 ZB45KQE TFD 558 JEHS 0680 B3 M 3 ZB48KQE TFD 558 JEHS 0800 B4 M 3 ZB5...

Страница 23: ...y 12 months but can be increased to 24 months if fitted with a fixed leak detection system 30 300 kgs 50 500 TCO Eq Every 6 months but can be increased to 12 months if fitted with a fixed leak detection system 300 kgs 500 TCO Eq Every 6 months however automatic leak detection system is mandatory which requires servicing every 12 months To calculate TCO Eq value Refrigerant charge kgs x Refrigerant...

Страница 24: ...J E Hall Limited Hansard Gate West Meadows Derby DE21 6JN England Tel 44 0 1332 253400 Fax 44 0 1332 371061 Email helpline jehall co uk www jehall com Issue 01 05 2019 ...

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