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86 Cards in this Set
- Front
- Back
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Sentronic oil control: red switch to the left means it's ____ |
tripped |
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Sentronic oil control: Check for voltage between terminals __ and ___ |
L and M |
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What is a turba-shred? |
A type of Emerson oil separator, which collects oil droplets on the compressor discharge and returns the oil from its reservoir along a high pressure line to the oil pressure differential regulator valve .This valve reduces the oil pressure to between 20 and 25 psig above the crankcase pressure of the compressor, providing even flow of oil to the oil level regulators or floats. |
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What should be added to a residential or commercial system after an acid burnout? |
Add flare burnout filter drier on both lines, also add injectable acid neutralizer |
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Is it a good idea to add a filter drier to the suction line? |
No, this kills the compressor |
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What do older compressors have for sensors? |
Cap tubes. They can leak due to vibration, and can be replaced with encapsulated switches and transducers |
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Hill Phoenix door heaters use fuses. T/f |
True |
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What should 404a be replaced with? Is it a straight drop in? |
R448a, aka Honeywell n40 solstice. "Near" drop in |
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On a defrost timer, what are terminals 3 and 4 |
3 is the defrost heater, 4 is the refrigeration circuit |
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Max filling of recovery cylinder? |
80% of volume |
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How to measure condenser approach |
Temp difference between condenser water leaving temp and condenser liquid line temp (carrier says 0-3 degrees F) |
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How to measure discharge setpoint and discharge air temp with eng a DJM |
Setpoint: VDC , PT 1 and PT3, multiply by 10 Volts DC, PT1 and PT (not labelled), multiply by 10 |
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How to jumper heat to Eng A DJM board: |
Jumper across FS and HS |
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How to troubleshoot eng a DJM ignition failure |
Ensure flame relay is pulled in, should have 24 volts across FR and neutral |
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Autoflame login |
hold start and commission until menu changes. Enter password 25401 |
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What is condenser split? |
Outside air temp subtracted from condensing temperature. i.e: 125 F condensing temp - 95 F ambient = 30 F split |
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How to pull a vacuum |
Jb eliminator, blue hose to suction and ball valve, supco gauge between blue hose and red hose going to vacuum pump |
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Would a condenser approach of 9 be too high or too low? |
Too high |
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How is condenser approach calculated |
Should be 0-3 degrees. Difference between liquid line temp and leaving condenser water temp |
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What refrigerant can 407c be a retrofit refrigerant for |
r22 |
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What is r449 a retrofit gas for? |
404a, 507, 407a/f and r22 |
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Atb bms login |
https://www.ubiquitysystems.net/UB4/index.php?SPAGE=/UB4/1_1.php&QSTR=SITEID=10078
UsernameEPotterPasswordGateway2!
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Honeywell economizer enthalpy curve we use |
Curve D |
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20 mesh strainer on evap Inlets. 20 mesh is very small. 60 mesh is small |
Quantech |
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Motor shafts measured 1/8" |
Driven shaft measured in 1/16th |
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Cpr: CCW to Lower amps CCW to reduce suction pressure in crankcase CCWTo increase suction pressure in evap |
CW to increase amps CW to increase suction pressure in crankcase CW to reduce suction pressure in evap |
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Save on login: |
Jdiaczun 6055 |
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Test microthermo sensor temp wires by shorting them and by opening them |
Should be -50 or 150, can't remember which is which. I think 150 is open wire |
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TCS sensors communication problems rsading: |
90 F for open 40 F for a short |
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Bitzer compressors |
Brandon Houston There is no pump, so no screen. Its a slinger so oil is slung around and collected in a cup on the end of the crank. It’s an optic safety that looks for oil in the cup. Have you pulled and cleaned the optic eye? It "sees" the oil by detecting the millivolt signal created by the oil itself. Sometimes the eye itself gets dirty and has issues with rectifying Brian Harju some do have a screen behind the drain plug, it fooled me once !! Never again!! |
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Micro thermo SLA |
Safety line alarm. safety line alarm. Any time a safety is tripped, with MT, the system reads it as a generic SLA. Whether it’s low pressure, high pressure, oil, etc.... we have had a problem with the compressor module setting it off randomly. No safety’s are tripping. |
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Isolating compressors: |
Always valve off the suction or the crankcase will get flooded with oil (as per mike Harding. |
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Holdback valves |
Never overtighten the auto/manual switch - it's just a needle valve and it will leak. Never overtighten the bolts that bolt the actuator to the valve. (As per Mike Harding) |
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Expansion tank location in piping |
Not on discharge side of pump. Somewhere upstream on the suction |
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How to fix leaking valve stem |
Turn valve all the way in before tightening the packing nut. |
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Traulsen coolers evap frozen up |
Replace temp sensor |
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Lochinvar setup menu |
Shutdown in the menu.
Once in shutdown mode, press and hold select button. Password 5309 |
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Loss of charge on trane CGAM - bad suction thermistor or suction transducer |
bad suction thermistor or suction transducer The loss of charge diagnostic is generated when the ratio of EXV % Flow Command/Superheat Control Compressor Flow Estimate is 1.7 or greater.The ratio should be 1 to 1. Everyone I've come across was due too a bad suction line temperature sensor. The EXV % Flow Command/Superheat Control Compressor Flow Estimate can be trended when adding/subtracting charge. As the line come together the charge is good. Know this due to a contractor seeing this diagnostic and dumping 30 extra pounds of gas into the machine (had a bad temp sensor). |
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Trane cgam exv |
Little sightglass with white ring moves when manually overriding txv |
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Trane passwords |
159 or 314 |
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Thermotek HMI password |
1234 |
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Traulsen unlock |
Hit middle button twice |
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Traulsen settings |
555 |
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On Carrier chillers if the model starts with 30 it has either a scroll, screw, or reciprocating compressor and the first letter determines the compressor type. Most of the time they have multiple compressors and are under 500 tons. If the model number starts with 19 like a 19XR it is a centrifugal. If the model number starts with 23 like a 23XR it is a water cooled screw machine with a single compressor. The third letter let's you know if the machine has a VFD. If the third letter after the first two numbers is a V than the compressors are on VFDs. |
Carriee |
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An RTAC500 is an air cooled screw chiller. The third letter in the model of every Trane chiller refers to the type of condenser (RTAA is an air cooled screw chiller The A let's you know that an RTHC is a water cooled screw machine the H stands for hydrogen AKA water) the last later is the model in that series and the first two letters tell you the compressor type. RT stands for Rotary Trane AKA Trane's name for their screw compressors just like the CV in a CVHE stands for Centravac Trane's name for their centrifugal compressors. And yes just one of those compressors is almost 50k not including the labor to replace it. Those compressors weigh about 1600lbs. I work for Daikin and one of our 500 ton screw compressors weigh almost 2500lbs. |
Trane |
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Walmart |
15% markup parts 90 regular rate 130 overtime 50 bucks |
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On CO2, Medium temp compressors are Low temp compressors are |
Transcritical compressors Subcritical |
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Kes misting bad pump |
Pipe water bypassed from RO filters into misting solenoid. And then bypass pump piping |
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E2 alarm bypassing |
Input definitions, bypass: yes, set time for 12 hrs, at 0deg, see ya tomorrow! |
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Hold back valve in -45 c with rack down |
Set to manual let it buck for 10 minutes, and that will get the rack going while you go get refrigerant |
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E2 access |
Hit Alt F for FULL access |
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Epr : in to increase sst, out to lower. Cw is in, ccw is out |
. Cw is in, ccw is out |
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E2 multiple cases on a circuit |
Instead of having the temp set at MAX in the setup, change it to MIN. Fort sask walmart/curtis |
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Co2 transcritical and subcritical: |
Subcritical: below 88 f Transcritical: above 88 f Triple point: -70 f |
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Hillphoenix antisweatt heaters |
Check for sweatmiser in electrical room, one relay controls one case. Bypass the relay |
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Oil screen plugged sysmptoms |
If oil pressure starts strong and then gradually drops until OFC cuts out |
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Save on foods calgary trail code |
23298# |
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WIF Freezer fans not coming on |
Check door switch |
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Cant find small leaks? |
Check compressor wire nut connections. Refrigerant can travel through the wire insulation. Especially on encapsulated pressure control wirings |
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Uncommon places to leak check |
Motor and compressors erpeckerheads |
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Microthermo node test fail |
Check little orange wiring harness in the back of the computer for a tight connection |
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Purolator number gateway |
6059099 |
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Eng A mtrac system problem |
Just saying that heat switch is open |
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Compressor proof failure |
Check oil pressure in reservoir, should be 20 psi differential above suction pressure. If differential is too low check oil filter pressure drop. If there is a pressure drop, replace oil filter |
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Siemens, jci, and others use 20 pounds |
Honeywell 18 psi |
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Time delay relays |
Replace with Eaton TRL04, they never fail |
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Set holdback valve for 70 f condensing sct |
70 f |
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Bypass valve set for 65 F sct |
Set fans for 80 f sct |
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sporlan a8 and a9 |
a8 is holdback valve - open of rise of inlet |
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leave gas ballast open until hitting ___ microns |
2500 |
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what is dead heading vacuum pump? |
putting vacuum gauge directly onto vacuum pump and seeing how low pump can go |
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what component do you need with an ORI for condenser flooding? |
an ORD or CRO |
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How to check check valve for bleed by on a case? |
Close SDR or EPR and watch case suction temp. It should stay the same. If it keeps rising to liquid temp, its passing.
It will also frost on inlet of check valve if flowing backwards.
Floodback is also a symptom.
Maybe infrared gun |
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High temp alarm on a case, previously the night before. How to diagnose? |
Check the rack head pressure /condensing pressure graphs and logs at the time of the high temp alarm. If head pressure was low at the time, could be low on refrigerant. Check receiver. |
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In MT, under Networks, there is an option to test all the nodes. Takes 25 min according to derek. To avoid nuisance errors, |
Find the equipment in MT and uncheck "test node periodically" |
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Ecojkmizer, test discharge air sensor by hampering t1 and t2, should open up dampers wide |
. |
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Co2 critical point |
88 f sat, or 1055 psi.Above this temp it is transcritical |
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Sporlan EEV troubleshooting |
Multimeter to AC, when valve is driving, Black and white, and red and green, 12 volts between each pair |
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Micro Thermo eev |
Base value needs readjusting: average of a normal good case should base value |
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Arctic chiller login |
user: USER Pass: user |
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Trane cgam temp sensor |
Not holding water or refrigerant back, just threads into a. Thermowell |
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Chiller inverted start |
When the condenser is colder than the evap. Causes problems for motor and drive cooling |
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Approach |
"usually" your approach temp should not be higher than whatever your temp difference between in and out is. |
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Replacement for 134a |
513a |
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How to know if oil separator is plugged |
If line coming out of the bottom is cold |
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Tower water in on bottom, out on top |
Chiller water in on top, out on the bottom |
