RC502+RP502 integeration vs only RP502

[Anonymous user]

Hi,

We have designed HACS with 6 units ACRP502 inrow.
In order to reduce prices and elect bill but not at the expense of reducing performance, can below be correct:

6 x ACRP502 = (2 x ACRP502) + (4 x ACRC502)

i.e. can (2 x ACRP502) + (4 x ACRC502) be implemented instead of 6 x ACRP502 without losing any cooling & humidity control performance ?

It is a concern we will be losing much more in performance in future. Please can someone help with more detail look at above suggestion.

Thanks

[upsguy_apc]

The question of can 2 RP and 4 RC be used in a HACS is yes they can. Will 2 RP 4 RC provide the same level of cooling and humidity control as 6 RP is no. RC's don't provide any humidity control. Both the RC and RP are both rated for 43kw cooling capacity.

However you could probobly get away with only using 2 RP's and 4 RC's as I doubt you would need the full level of humidity control that 6 RP's would provide in a HACS of this size. Is there any additional means of humidity control in your data center? Have you had an engineer determine the amount of humidification needed for your climate and building? That would be the first step to determine if only 2 RP's will be sufficient in your datacenter.

[Anonymous user]

Thank you for your answer.
Climate control has been determined by an engineer and having 2RP+6RC is his suggestion, therefore you are correct 2RP will be enough for the HACS humidity control but the suggestion is mainly for the reason of having even more power efficiencies in our HACS since RP power consumption due to its humidification characteristic is much more than RC. is this true?

In the case of 2RP doing the job of humidity control, is power efficiency of 2RP+4RC better than 6RP ? or is it equal ?
will there be a waste of power having 6RP controlling humidity when 2RP will be enough or no difference due to systems' control set up?

Thanks

[upsguy_apc]

The answer of efficiency is a bit hard to determine from RC to RP but RC's can only consume a set amount of power at max load where a RP can consume RC max power plus any power needed for de/humidification. The RP has a higher power consumption rating due to the humidification circuit and the reheat coils which are used during dehumidification. During normal operation with no humidification or dehumidification demand the RC and RP would use nearly the same amount of power to provide the same level of cooling.

If you were to use the 6 RP's would you group them together? If so then having 6 RPs would provide no greater dehumidification control than 2 because the Master unit will only allow 1 unit at a time to enter dehumidification mode. Typically cooling units with a high load are grouped together in a HAC to provide even cooling and to prevent hot spots. So for the greatest efficiency you would be best to group your 4 RC's together and have your 2 RP's grouped together.

[Anonymous user · Accepted solution]

Hi,

We have designed HACS with 6 units ACRP502 inrow.
In order to reduce prices and elect bill but not at the expense of reducing performance, can below be correct:

6 x ACRP502 = (2 x ACRP502) + (4 x ACRC502)

i.e. can (2 x ACRP502) + (4 x ACRC502) be implemented instead of 6 x ACRP502 without losing any cooling & humidity control performance ?

It is a concern we will be losing much more in performance in future. Please can someone help with more detail look at above suggestion.

Thanks