Lennox MLA009S4S-*P, Руководство по установке

Страница: 10 / 28

10
Indoor Unit Condensate Piping Connections
IMPORTANT
Make sure that drain piping is properly routed and
insulated to prevent both leaks and condensation.
1. Use a field-provided hose clamp to secure the drain line
stub on the side of the unit chassis to a field-supplied
1” (25 mm) drain line.
NOTE: Take care not to over-tighten the hose clamp as
this may damage the drain line stub.
NOTE: Connection between stub and drain line must be
watertight. Apply non hardening plumbing joint
compound if needed to ensure a watertight seal.
INSULATION
INDOOR
UNIT
CONDENSATE
LINE STUB
HOSE CLAMP
FLEXIBLE DRAIN
CONNECTOR
PVC DRAIN
PIPE
Figure 10. Condensate Gravity Drain Option
2. For applications including an indoor unit and a gravity
drain. In this case, ensure that the drain line is properly
sloped (no less than 1/4 inch per foot (18 mm per m))
and condensate lines are routed to ensure moisture is
drained away from the indoor unit.
Suspension Rods
Drain line
Structural Ceiling
3 ft.
(1 m)
Support
straps
NOTE - Drain line should be sloped 1/4 inch per foot (18 mm per m)
AWAY from unit and should be supported as needed to prevent sagging.
Do not overtighten drain fitting.
Do not operate unit without condensate drain trap.
Clean Out
Do not glue
3”
3”
Anti-siphon vent must extend above the
height of the coil drain pan by 2” (51 mm).
1 ft.
(305 mm) max
Indoor Unit
Figure 11. Slope Condensate Drain
3. For applications including an indoor unit using the
internal drain pump.
SUSPENSION RODS
DRAIN LINE
STRUCTURAL CEILING
8 in.
(203 mm)
Max. 28 in
.
SUPPORT
STRAPS
3 ft. (1 m)
Figure 12. Condensate Drain with Factory
Condensate Pump
4. In all cases, drain should be as short as possible and
should not have any droops or kinks that would restrict
condensate flow and shall be constructed using an
approved pipe. There must be a 2-inch (51 mm) space
between the end of the condensate drain and the final
termination point (ground, open drain, etc.) to ensure
that the line will drain freely.
IMPORTANT
Drain should have a slope of at least ¼ inch per foot and
should be approved corrosion-resistant pipe. You must
confirm operation of every drain and pump in the system
as part of the commissioning procedure.
5. After system installation is complete, the condensate
drain line must be checked for leaks and the condensate
pumps must be checked to ensure proper operation.
This check is part of the start-up process which must be
done by the installing contractor. Turn the condensate
drain pan test cover latch counterclockwise to open
the cover and access the drain pan. Funnel enough
water to engage the pump into the drain pan through
a flexible tube.
6. Operate the system in the cooling mode. If the internal
pump is being used, ensure that the pump is operating
and the water in the pan is draining freely. If the internal
pump is not being used, pour the water into the drain
pan and confirm that it has flowed freely out of the
pan and out of the drain termination. If a leak is found,
shut down power to the unit at once and do not restore
power to the unit until the problem has been resolved.
7. Return the test cover and turn the latch clockwise to
re-lock it.
DRAIN PAN
TEST COVER
FUNNEL WATER INTO
PAN THROUGH TUBE
FOR TEST
COVER LATCH
(Turn latch
counterclockwise
to unlock)
CLOSEDOPEN
CLOSE
D OPEN
Figure 13. Condensate Drain Test
Outdoor Unit Installation
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.