17
STORAGE
•
To avoid contamination and corrosion, the units must be stored in dry and clean area.
•
Storing for long periods is not recommended, but where this cannot be avoided the fan motors must run for a minimum of 2 hours per month. Failure to do
so will invalidate manufacturer’s warranty.
GENERAL
Upon receipt, the units should be visually inspected, any transport damage and / or missing parts must be recorded on the delivery note and the manufacturer
notified in writing within seven days. Please ensure:
•
The pipework shows no signs of damage.
•
The fan set / motor terminals box lids are not cracked or showing signs of obvious damage.
•
The electrical screw terminals in control panels and motor mountings should be checked for security.
•
Units are not portable and are only for permanent installation.
THE UNITS ARE DELIVERED WITH 0.35 BAR HOLDING CHARGE (N2) WHICH SHOULD BE SAFELY RELEASED THROUGH THE SCHRAEDER VALVE
ON THE SUCTION HEADER BEFORE REMOVING THE BRAZED HEADER / MANIFOLD CAPS.
•
If the holding charge is not present the manufacturer should be contacted immediately.
•
Units that have been packed in cardboard must be stored in a dry environment to prevent any water damage.
DAMAGE CAUSED BY INCORRECT INSTALLATION / UNIT MIS-HANDLING WILL INVALIDATE THE MANUFACTURERS WARRANTY
TEV SELECTION
It is important that the TEV is correctly sized and, for maximum performance, located within 100 mm of the distributor inlet. The TEV size should be determined
from manufacturer’s data using the maximum operational capacity and the minimum TEV pressure drop.
Externally equalised TEV must be used.
The minimum TEV pressure drop is the minimum condensing pressure minus the evaporator pressure and the distributor assembly pressure drop.
If the TEV is undersized or the condensing heat pressure fall below the minimum selected the evaporator pressure will drop causing ice build-up on the
evaporator coil.
DISTRIBUTOR ASSEMBLY PRESSURE DROP BAR
MODEL
DISTRIBUTOR
R134a
R404A
R407B/C
R507
UKEC 10 to 55
1/2"
1.0
1.5
1.5
1.5
UKEC 70
5/8"
1.0
1.5
1.5
1.5
UKME 50
1/2"
1.0
1.5
1.5
1.5
UKME 60 to 95
5/8"
1.0
1.5
1.5
1.5
UKME 115 to 175
7/8"
2.0
2.96
2.96
2.96
