[Equest-users] User Expression set up for cooling capacity

[Kevin Madison]

Instead of setting SYSTEM:COOLING-CAPACITY, set ZONE:COOLING-CAPACITY 
with this expression and it should work. SPACE is a directly referenced 
command from the ZONE command, not the SYSTEM command. Do not input 
anything for SYSTEM:COOLING-CAPACITY. PTAC is a zonal system. Each zone 
underneath a SYSTEM of TYPE = PTAC gets its own system. All capacity 
inputs at the SYSTEM command for PTAC only serve as defaults for the 
individual zonal systems. So if your capacity varies by each individual 
PTAC, which this expression implies, then COOLING-CAPACITY should be 
input at the ZONE.

Kevin


On 5/2/2012 1:12 PM, Vipul Babriya wrote:
> Hello All,
>
> I am trying to set up user expression for defining the cooling 
> capacity @ system level based on total cooling SF, total cooling 
> capacity and local space area. i have PTAC system and it is system per 
> zone.
> For Example,
> Total Project Cooling cap = X
> Total Project Area = Y
>
> Cooling capacity for each system = #pa("Total Project Cooling 
> cap")/#pa("Total Project Area")* #LR("SPACE","AREA")
>
> Above expression does not work since i am referencing local space @ 
> system level.
>
> Do anybody have any idea how to recall local space area @ system level.
>
> Thanks in advance.
>
> Vipul
>
>
>
>
>
>
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