Engineered air DG SERIES, Инструкция по установке, эксплуатации и обслуживанию

Страница: 16 / 35

A
DJ & DG MANUAL
16 of 34 May 12 R2
Recovery, reuse, recycling, reclamation, and safe disposal of refrigerant is the only acceptable practice
today. Venting of refrigerant into the atmosphere during installation or servicing is unacceptable. To avoid
damage, use an accepted refrigerant recovery system whenever removing refrigerant. When working with
refrigerants you must comply with all local government safety and environmental laws.
DRAIN TRAPS
Each drain connection requires a separate drain trap supplied and installed by the contractor. For a trap to
work properly, it must be primed. During freezing periods, primed traps may need to be heat traced or drain
and plug the trap when not in use. If a drain connection has a smaller pipe inside, connect to the outer pipe
only. Ensure that the trap is of adequate depth to operate against a static that includes the extra pressure
drop for dirty filters.
Warning:
m
Failure to properly trap each connection can result in drain pan flooding,
standing water in unit, building damage, injury or death, cause poor air
quality or other problems.
In some applications (e.g. heat recovery units) there may be additional drain connections inside the curb
intended to be connected to the building drainage system. These drains must be connected and properly
trapped.
Cooling coil drain pans may have multiple drain connections extending outside the unit casing. Multiple
drains may be connected to a common drain providing that each drain is individually trapped and vented to
avoid problems from drains in different pressure zones. The drain must be properly sized and sloped.
Size drain trap with the following minimum requirements:
a)
Units With Draw Through Drain Pans:
H1 = Negative Static
†
x 1.5 + 3.5” (89mm)
H2 = Negative Static
†
x 0.75 + 2.5” (64mm)
b)
Units With Blow Through Drain Pans:
H2 = Maximum Positive Static
†
x 1.5
H1 = H2 + 0.5” (13mm)
† Static Water Column (WC) in inches or mm
including fully loaded filters.
Ensure adequate clearance for properly sized drain traps.
FLUSHING AND DEGREASING OF WATER AND GLYCOL COILS
Coil tubing may contain material or residue from manufacturing, transportation or storage. To prevent
possible damage to other components in the system, the coils must be flushed and degreased. Consult a
qualified water treatment specialist.
H1
H2
H1
H2
VENT & PRIMING
FUNNEL
TO DRAIN
OPTIONAL
CLEAN OUT
ATMOSPHERIC