Trane AquaStream CGWN 205 - Page 52

General Start-up
CG-SVX06D-E452
In case of application with negative
temperature at the evaporator,
combination of simultaneous usage
of glycol both in evaporator and
condenser, or usage of another type
of fluid: please contact your local
Trane sales representative. A relief
valve is located at pump suction
limiting water circuit pressure at
3 bar. Nitrogen pressure inside of the
expansion tank must be equal to the
geometric height of the installation +
0.5 bar (in order to avoid air entering
in the water circuit). Expansion tank
must be inflated with nitrogen.
Pressure must be checked yearly. For
a good pump operation, pump
suction pressure must be between
0.5 and 2.5 bar when pump runs.
The correction factors found in the
table above can be applied as
follows:
1. Cooling capacity with glycol [kW]
= F-CC x Cooling capacity water
[kW] (found in the General data
section)
2. Power Input with glycol [kW] = F-
PI x Power Input water [kW]
(found in the General data
section)
3. Water Flow Evaporator with
glycol [Litres/sec] = F-FLEVP x
Cooling capacity with glycol [kW]
x 0.239 x (1 / Delta T Evaporator
[°C])
4. Water Pressure drop Evaporator
with glycol [kPa] = F-PDEVP x
Water Pressure drop Evaporator
water [kPa] (refer to the "Standard
units evaporator pressure drop"
and "HE units evaporator pressure
drop" figures.)
CGWN Only:
5. Water Flow Condenser with glycol
[Litres/sec] = F-FLCDS x (Cooling
capacity with glycol [kW] + Power
input with glycol [kW]) x 0.239 x
(1 / Delta T Condenser [°C])
6. Water Pressure drop Condenser
with glycol [kPa] = F-PDCDS x
Water Pressure drop Condenser
water [kPa] (refer to the "Standard
units condenser pressure drop"
and the "HE condenser pressure
drop" figures)