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22-06-2010, 07:57 PM #1
small capacity Evaporator Pressure Regulator
I have different smaller conditioning rooms suited with small 1/4 hp hermetic units.
Chamber is equipped with a small evap AND dehumidifying coil. I need to maintain the dehumidifying coil temp at about +3°C to avoid ice building up.
The problem is that most evap pressure regulators start at a size of 1/2" with capacities of ... - 2.5~2.9kW.
To avoid valve hunting at this small capacity, I am looking for a valve with smaller capacity ranges.
Anyone an idea which brand/type suits my installation?
regards,
Mario
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25-06-2010, 05:11 PM #2
Re: small capacity Evaporator Pressure Regulator
hi majo, I have noticed your thread for a few days, but reading your thread, made me realise that you are talking about very small systems and then you say it has a de.humid coil aswell , but for us to appreceate what you have got is very difficult with the info you have given ,
q, have you got any heating to compencate for when you have de-humid on?
q- how many condencing units are on one < room< is there one on the cooling and one on the de-humid ?
majo , can you give us more info?
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25-06-2010, 05:17 PM #3
Re: small capacity Evaporator Pressure Regulator
What about hot gas bypass or small heating element?
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04-07-2010, 11:33 AM #4
Re: small capacity Evaporator Pressure Regulator
Yesss...chambers are equipped with a 350W heating element.
There is 1 unit for both the evap and dehumid coils.
The dehumid coil has to be higher in temp. I've allready placed the evap temp regulator mentioned above (units -2,5kW) in an experimental chamber at the office. It's working fine, temp stays at a stable 3°C.
But I'm still afraid of valve hunting at certain conditions.
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14-07-2010, 09:08 PM #5
Re: small capacity Evaporator Pressure Regulator
no one into smaller sh**
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15-07-2010, 03:18 AM #6
Re: small capacity Evaporator Pressure Regulator
I would suggest a small hot gas bypass valve similar to the ones used on small air dryers.
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