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26-09-2022, 09:38 PM

RANGER1 replied to a thread Grasso Compressor Oil carryover in Industrial Compressors

Amjad123, DP for fine filters is 3,2 bar, so this is pressure across coalescer filters in oil separator? If so, not correct, what is high side...

2 replies | 125 view(s)

26-09-2022, 08:39 PM

GrantD replied to a thread Grasso Compressor Oil carryover in Industrial Compressors

Hi Amjad123, Check your suction valve NRV (non return valve). Maybe you losing oil on the spin back when the machine cycles off / shuts down. ...

2 replies | 125 view(s)

26-09-2022, 04:38 PM

Rob White replied to a thread Ultra low freezer in Fundamentals

. Hello IvanZ A long time ago I helped with a project for cooling metal components in a chamber down to those types of temperatures and...

1 replies | 66 view(s)

26-09-2022, 03:42 PM

Amjad123 started a thread Grasso Compressor Oil carryover in Industrial Compressors

Gents, Dealing with an issue and need your suggestion please... 1)We have Grasso P type screw compressors (Model: PR-P36S-28) working on NH3 for...

2 replies | 125 view(s)

25-09-2022, 09:28 PM

Tayters replied to a thread Help with air con unit placement. Angled ceiling, high windows. in Air Conditioning

I'd say the outside wall option (that is an outside wall right?) is best as pipes can run externally in trunking with a gravity drain. Are you...

1 replies | 99 view(s)

25-09-2022, 07:22 PM

seaweader started a thread Help with air con unit placement. Angled ceiling, high windows. in Air Conditioning

Hi, I’m building a new home, and am struggling to get some decent help from the air conditioning supplier in terms of placement. Also, I live...

1 replies | 99 view(s)

25-09-2022, 02:42 PM

IvanZ started a thread Ultra low freezer in Fundamentals

Dear all, I have been reading your forum and have read a lot of useful information. I am also working on the production of ultra-low temperature...

1 replies | 66 view(s)

22-09-2022, 03:48 PM

SnowBro replied to a thread Eliwell Free Studio Plus in Controls

bumped....

2 replies | 318 view(s)

21-09-2022, 10:38 PM

MMCDONALD started a thread Tk sb210 with high head and suction pressures after compressor replacement in Transport

I got a thermo king sb210 with high head and suction pressures after compressor replacement . Rebuilt 3 way valve and clean Debris out of Discharge...

0 replies | 109 view(s)

18-09-2022, 10:24 PM

mowgers replied to a thread Samsung dvms in Trouble Shooting

Hi mate, What is the model number of your units? I don't think you can code out like Daikin etc. A wholesaler called Dysk are very helpful with...

1 replies | 205 view(s)

18-09-2022, 01:26 PM

Welshman started a thread Lamona HJA 6100 in Trouble Shooting

Help required on a Lamona 6100, the old front panel no lights, new panel installed, now everything lights up

0 replies | 52 view(s)

17-09-2022, 08:34 PM

wingers started a thread Hotpoint fridge/freezer - internal light flashing and making noises when opening door in Trouble Shooting

please delete this post - thank you

0 replies | 86 view(s)

17-09-2022, 06:05 PM

seanf replied to a thread thermal cameras for setup/trouble shooting? in New Technologies

Good for electrical panel checks. Is it just a receiver on a commercial unit the youtuber is checking or industrial? Maybe the tuber is catching...

1 replies | 141 view(s)

17-09-2022, 05:12 PM

knighty started a thread thermal cameras for setup/trouble shooting? in New Technologies

I watch a few refrigeration guys on youtube sometimes, nice to see how other people do things etc. one guy (seams like he knows what he's doing)...

1 replies | 141 view(s)

17-09-2022, 03:04 AM

RANGER1 replied to a thread Refrigeration control valve KV calculation software in Fundamentals

David15, May have information, not sure, check out. CoolPack - IPU

1 replies | 136 view(s)

17-09-2022, 12:49 AM

David15 started a thread Refrigeration control valve KV calculation software in Fundamentals

Hi, do you know any tool or software to calculate pressure drop across a valve when KV, P1, P2 and massflow are known? For saturated liquid,...

1 replies | 136 view(s)

17-09-2022, 12:46 AM

David15 started a thread CO2 transcritical KV valve calculation in CO2

Hi, I'm tryin to calculate pressure drop across a valve when the fluid state is transcritical. On discharge side (before gas cooler) and on gas...

0 replies | 133 view(s)

17-09-2022, 12:12 AM

RANGER1 replied to a thread water defrost for low temperature coils in NH3

Rocky123, If you use hot gas, it is usually hot gas only. I was suggesting the water will raise pressure in coil if isolated, which...

9 replies | 377 view(s)

16-09-2022, 03:04 PM

mbc replied to a thread water defrost for low temperature coils in NH3

Hi Sounds for me it is flooded system with large evaporator . Best and Economic way for defrosting this type of systems is hot water and in...

9 replies | 377 view(s)

16-09-2022, 08:15 AM

RANGER1 replied to a thread water defrost for low temperature coils in NH3

ROCKY123 not sure how many evaporator coils you have, but liquid drain line off bottom of coils, defrost relief valve on this lowest connection would...

9 replies | 377 view(s)

16-09-2022, 06:15 AM

ROCKY123 replied to a thread water defrost for low temperature coils in NH3

this is a good idea, did you try how this compares to water only defrost energy efficiency wise..?

9 replies | 377 view(s)

16-09-2022, 06:10 AM

ROCKY123 replied to a thread water defrost for low temperature coils in NH3

when you are using hot gas and water for defrost, what's the usual sequence. hot gas for draining coil and the water for removing ice..?

9 replies | 377 view(s)

16-09-2022, 06:07 AM

ROCKY123 replied to a thread water defrost for low temperature coils in NH3

Hi Ranger, Using hot water is a good choice, specially if i can recover some heat from condenser to make this hot water. I was trying to see if...

9 replies | 377 view(s)

15-09-2022, 10:42 PM

NH3LVR replied to a thread water defrost for low temperature coils in NH3

Until you have a way to raise the pressure and force the NH3 out of the coil, defrosting is a slow process as Ranger1 suggested. I have never used...

9 replies | 377 view(s)

15-09-2022, 08:47 PM

seanf replied to a thread water defrost for low temperature coils in NH3

What if you added a second evaporator that was outside in the outdoor ambient, to use as a heat source/load only during defrost so that you can use...

9 replies | 377 view(s)

15-09-2022, 12:15 PM

Gomes started a thread Gomes in Air Conditioning

Daikin Multi systems: We want to know if any one came across this sort of problem, we have installed few months ago, 3 Daikin Multi systems,...

0 replies | 148 view(s)

15-09-2022, 12:04 PM

Rob White replied to a thread Zanotti 20s high pressure in Refrigerants

. R404A at 28degC is about 12bar. Did you put pure R404A in? 404A does lose some of its blend if it has a leak. R404A is made of 3...

3 replies | 167 view(s)

15-09-2022, 09:23 AM

RANGER1 replied to a thread water defrost for low temperature coils in NH3

ROCKY123, Some following methods could considered. 1/ Use warmer water if available, not to hot though, might need mixing...

9 replies | 377 view(s)

15-09-2022, 08:11 AM

ROCKY123 started a thread water defrost for low temperature coils in NH3

Hello, Is water defrosting for large low temperature coils really efficient...? We have a tunnel freezer with almost 1500 liters of ammonia with a...

9 replies | 377 view(s)

14-09-2022, 03:41 PM

Androidkil replied to a thread Zanotti 20s high pressure in Refrigerants

temperature 28 degrees HP 9.85 LP 9.76

3 replies | 167 view(s)

14-09-2022, 12:52 PM

Rob White replied to a thread Zanotti 20s high pressure in Refrigerants

. Hello. Your English is better than my Italian :). Assuming you did not contaminate the system when you broke the vacuum? Is the...

3 replies | 167 view(s)

14-09-2022, 12:40 PM

Rob White replied to a thread Help in New Technologies

. I have not worked on a screw and scroll in the the same circuit but I have worked on circuits where a scroll was feeding both low and high...

1 replies | 159 view(s)

14-09-2022, 10:49 AM

Androidkil started a thread Zanotti 20s high pressure in Refrigerants

hi I have a zanotti 20s type of gas r404 and from the label I read 1.10 KG I change the deindrator filter I replace the orifice I do a vacuum and...

3 replies | 167 view(s)

14-09-2022, 09:50 AM

Lars87 started a thread Help in New Technologies

Hi all, I have a r404a application where i have to use a low temperature (-35C evaporation) temperature screw compressor and medium/high...

1 replies | 159 view(s)

14-09-2022, 08:22 AM

Rob White replied to a thread Overrsized evaps and other questions for cascade system. in Technical Speculations

. For the most part, normally systems are designed for the running temp and they will have a high back pressure while the room is pulling down to...

1 replies | 145 view(s)

13-09-2022, 07:03 PM

Zair789 started a thread Samsung dvms in Trouble Shooting

Hi Wondering if anyone can help . I seem to be working on more Samsung than ever before . And unable to find any technical help . Does anyone...

1 replies | 205 view(s)