
Water side heat exchanger must apply with treated and
fi
lted water, water property quality should within the
range
Table 11
water quality requirements, to avoid the
damage of unit. Detail method please consulting experts
in water treatment.
Water property
requirements
NH
3
<2 ppm
NH
4+
<2 ppm
Cl
2
<1 ppm
Cl-
< 300 ppm
H
2
S*
<0.05 ppm
SO4
2-
< 70 ppm
CO
2
†
<5 ppm
Fe
2+
/Fe
3+
<0.2 ppm
O
2
< 5 ppm
NO
3
<100 ppm
Si
< 0.1 ppm
Al
<0.2 ppm
Mn
<0.1 ppm
hardness
71.2<…<151.3mg/l CaCO
3
resistance
>3000ohm.cm
conductivity
200<…<600µS/cm
pH
7.5<…<9
36
RTAG-SVX001H-EN
Installation - Mechanical
If the unit will remain operational at subfreezing ambient
temperatures, the chilled water system must be protect-
ed from freezing.
water box and shell surface are factory-installed
heaters and insulated on the packaged unit evapora-
tor and will help protect it from freezing in ambient
temperatures down to -20°F (-29°C).
control panel does not check the electric heater op-
eration status, which need to be made by quali
fi
ed
technical. Manually inspect electric heating power,
and con
fi
rm the performance of the electric heater,
to avoid catastrophic damage to the water side heat
exchanger. User could install optional electric heating
failure alarm device, when there is a electric heater
disconnecting, it will send out sound and light alarm.
Install heat tape on all water piping, pumps, water
box nozzles and other components that may be
damaged if exposed to freezing temperatures. Heat
tape must be designed for low ambient temperature
applications. Heat tape selection should be based on
the lowest expected ambient temperature.
field, which needs 230V single phase.
Table 11.