Toshiba MMD-VNK502HEXE-TR Installation Manual page 28

Air to Air Heat Exchanger with DX Coil Unit
Detach the humidification element (VNK
type only)
1
Pull the front humidification element to
detach.
2
(MMD-VNK802 / MMD-VNK1002) Pinch the
tabs of the hose band of the water supply
tube attached to the back humidification
element, then detach the tube.
3
(MMD-VNK802 / MMD-VNK1002) Pull the
back humidification element to detach.
Humidification
element
NOTE
• Drain water remaining in the humidification element
into the drain pan.
• Do not bend, fold, or pull the water supply tube.
Quantity of the
Model name
humidification element
MMD-VNK502HEXE-TR 1
MMD-VNK802HEXE-TR 2
MMD-VNK1002HEXE-TR 2
Washing the humidification element
Wash away dust and dirt from the humidification
element by putting the element in a bucket of water.
Move the element in the bucket up and down to wash.
53-EN
Installation Manual
NOTE
• Do not use a scrubbing brush.
• Do not water the humidification element with a hose;
otherwise, the element may be damaged.
• Do not use hot water of 40 °C or hotter. Do not use any
detergent.
Scrubbing brush
Hose
Attaching the humidification element
• Attach the humidification element in the reverse
order to detach it.
• Attach the water supply tube securely and ensure
that there is no water leakage.
Cleaning the drain pan (All type)
Check whether there is dust and dirt in the drain pan
and drain outlet. Clean up the drain pan and drain
outlet when they are clogged.
Drain pan
Drain outlet
Checking after servicing (VNK type only)
1
Open the service valve as necessary.
2
In winter (the season for using the
humidifier), check whether the antifreeze
heater is turned on.
3
Perform a test run and ensure that there is
no water leakage.
NOTE
When the humidifier is not used, drain off water from the
cistern tank and water supply pipe.
Air to Air Heat Exchanger with DX Coil Unit
– 27 –
Maintenance of the humidifier
element (VNK type only)
The replacement cycle of the humidifier element varies
greatly depending on the conditions of use. Refer to the
cycles below as general replacement cycles. (They are
not the terms of guarantee.)
When the water hardness is 25 mg/L Every 5 years
When the water hardness is 50 mg/L Every 3 years
When the water hardness is 100 mg/L Every 2 years
• The humidifying performance deteriorates gradually
as impurities in tap water are accumulated in the
humidifying element.
• In general, replace the humidifying element when the
humidifying performance of the element has
deteriorated by 20 to 40 % compared with that of a
new one.
• Estimated operating hours: 10 hours per day X 20
days per month X 5 months per year = 1000 hours
per year
• The amount of impurities accumulated in the
humidifying element is largely dependent on the
water quality (water hardness, the variety or amount
of impurities, the pH of the water, water temperature,
etc.) or conditions of use.
Installation Manual
54-EN