Results 1 to 4 of 4
Thread: Heat Pumps
-
14-11-2009, 02:44 AM #1
Heat Pumps
Hi, there just a newbie.
Wondering on a heat pump with air handler, if when the outdoor heat pump is place high on a roof (say 25ft) would you have to trap both lines or just the suction. Also what is the standard pressure test for 410a system on a heat pump.
-
14-11-2009, 11:34 AM #2
Re: Heat Pumps
Hello. Presumably the pipe run is under the permissable maximum. If its a Daikin or the like, no traps required are required.
In the words of David Byrne, Well...How did I get here?
-
14-11-2009, 11:38 AM #3
Re: Heat Pumps
Sorry. strength test high side 41 bar. Consult spec for low side.
In the words of David Byrne, Well...How did I get here?
-
14-11-2009, 02:02 PM #4
Re: Heat Pumps
For almost any split system made in Japan there would be no requirment for any oil traps.
The manufacturer should always specify what tube size to install & any requirment for oil traps.
Most R410a split systems have HP trip at around 41 bar.
So if for example the AHU air flow is reduced or stops in heat mode then the system could run right up to 41 bar & stop on the HP safety cut out switch. In this instance the installed interconnecting tube would be exposed to 41 bar pressure.
In UK we work to BS EN378.
So we make breif strength test of arround 41 to 43 bar & then a longer 24 hr leak test at arround 33 bar.
Similar Threads
-
Capacity control
By sparrow in forum TrainingReplies: 44Last Post: 18-01-2010, 07:49 PM -
Some information on the aplication of suction gas/liquid line heat exchangers
By SteinarN in forum FundamentalsReplies: 5Last Post: 14-09-2009, 07:33 AM -
Basics or is it?
By Fett in forum FundamentalsReplies: 17Last Post: 10-09-2009, 01:45 AM -
frostles heat pump
By Lc_shi in forum New TechnologiesReplies: 27Last Post: 31-03-2008, 07:53 AM -
High Altitude Heat Pumps
By Grog in forum Air ConditioningReplies: 2Last Post: 23-03-2007, 09:30 AM