Carrier 16LJ-01 Operation Manual page 53

4-3-2. Water treatment for long term shut down
Perform the following treatment during long term shut down with no-circulation of chilled/hot
water, cooling water in the Chiller. Please consult Carrier service agent for the
the details.
(1) Cooling water
Wet lay up usually. (Keep the cooling water full in the Chiller.)
In case the freezing of cooling water is likely to happen, drain it from the Chiller.
Operation of valve is different between wet lay up and dry lay up.
a)Wet lay up
a-1)Discharge cooling water from its discharge port on the cooling water outlet.
a-2)Pour anticorrosive into the water.
Check holding water quantity and decide the anticorrosive quantity so that the
propotion of both quantity is appropriate.
a-3)Full up the cooling water in the Chiller.
a-4)Operate the cooling water pump until anticorrosive is evenly mixed.
a-5)Close the isolation valves of inlet and outlet on the cooling water line.
b)Dry lay up
Before draining cooling water from the Chiller, clean the inside of the tube and
make corrosion protective covering.
b-1)Discharge cooling water from its discharge port on the cooling water outlet.
b-2)Remove the scale and/or slime adhesion in the tubes by brush cleaning.
(If scale and/or slime cannot be removed by brush cleaning, perform chemical
cleaning.)
b-3)After sufficient washing, pour anticorrosive into the water, and circulate the
water with anticorrosive for 30 minutes or more.
(The concentration of anticorrosive should be even.)
b-4)Discharge the water from the discharge port on the cooling water inlet.
b-5)Keep the discharge port open during shut down.
(2) Chilled water
Wet lay up usually. (Keep the chilled water full in the Chiller.)
4-3-3. Winter season
In case the ambient temperature of the Chiller in winter is likely to be below 0℃,
freeze prevention is necessary.
Consult Carrier service agent for the details.
(Dry lay up)
49