McQuay MDS030AR Applications Manual page 109

compressed air source is available, please use it to blow away the dust from the surface of the
heat exchanger. If the unit is operating in an oily, salty, wet or dirty environment, do clean it with
special-purpose detergent. It is not advised to wash it with water. Please use special-purpose
detergent to clean a dusty heat exchanger (for example, SF-98 or YD-402).
Please note the following while using the unit:
While the unit is running, please do not point any pole or any other hard material to the
equipment through the exhaust hood, to avoid bodily injuries and equipment failures;
During the airtight and leakage test, never let inflammable gases like oxygen and
acetylene into the cooling loop, to avoid hazards. Do perform tests of this kind using
nitrogen or refrigerant.
Care at the beginning and end of the running season
Beginning of the season
Check the return air inlet and outlet to see if they are blocked. If so, remove the obstacle;
Check that the grounding unit is in good condition to ensure that the air-conditioning unit
operates safely.
Thoroughly check the and clean the indoor and outdoor units;
Clean or replace the air filter;
Clean the drain pipe;
Secure all electric connections;
Check if the refrigerant leaks. Please ask professionals to troubleshoot the unit and
clean the filter.
End of the season
On sunny days, have your air-conditioner running in air supply mode half a day, to keep
the inside dry;
Turn off the power. Otherwise, the unit still consumes power.
Ask professionals to troubleshoot and clean the filter.
Important notice for daily operation, maintenance and care
Set the unit to an appropriate room temperature, preferably within the range of 26 ~ 28
for cooling and 18 ~ 236
Keep the windows and doors in the air-conditioned room closed, to avoid lowering the
efficiency of the air-conditioning unit;
Use a curtain or shutter for the windows to keep out direct sunshine;
Do not put any floc or anything else around the air outlet and the return air inlet. Otherwise,
the unit might work at a lower efficiency or even fail;
Mechanical wear and dust inside the unit might worsen the performance of the unit. Be sure
to clean and maintain the unit in due time;
If the air-conditioner stays idle for a long time, please switch it off. To protect the air
conditioner, switch it on at least 24 hours before you use it again, to heat up the compressor
and the heater.
Caution
In case of any exception (say, burning smell), turn off the power immediately, and seek help
from the local branch or dealer;
If you continue using the air-conditioning unit even after the exception takes place, this might
damage the unit or even result in electric shock or fire;
Only professional service personnel are allowed to maintain the air conditioner. Be sure to
turn off the power before touching the termination.
Never clean the air condition before it is switched off. Otherwise, you might suffer an electric
shock or a bodily injury.
Design & installation Guide For McQuay MDS Multi System
for heating;
-109-