6 | Condensate Drain LM CS Series Heat Pump
LM CS Series Heat Pump8 733 920 847 (2014/01) Subject to change without prior notice
CONDENSATE DRAIN
Figure # 3
A drain line must be connected to the air handler
and pitched away from the unit a minimum of 1/8”
per foot to allow the condensate to flow away from
the unit.
This connection must be in conformance with local
plumbing codes. A trap must be installed in the
condensate line to insure free condensate flow.
A vertical air vent is sometimes required to avoid
air pockets. The length of the trap depends on the
amount of positive or negative pressure on the
drain pan. A second trap must not be included.
WATER PIPING
Supply and return piping must be as large as the
unit connections on the heat pump (See manual
Pg#10 for any line size at installation length longer
than 25 feet).
LM units are supplied with either a copper or
optional cupro-nickel condenser. Copper is
adequate for ground water that is not high in
mineral content.
In conditions anticipating moderate scale
formation or in brackish water a cupro-nickel heat
exchanger is recommended.
Both the supply and discharge water lines will
sweat if subjected to low water temperature.
These lines should be insulated to prevent damage
from condensation. All manual flow valves used in
the system must be ball valves. Globe and gate
valves must not be used due to high pressure drop
and poor throttling characteristics.
Flexible hoses should be used between the unit
and the rigid system to avoid possible vibration.
Ball valves should be installed in the supply and
return lines for unit isolation and unit water flow
balancing.
ELECTRICAL
Refer to electrical component box layout.
(Figures #5,6)
Drain Pan is not internally sloped.
Never use flexible hoses of a smaller inside
diameter than that of the fluid connections
on the unit.
Proper testing is recommended to assure the
well water quality is suitable for use with water
source equipment.
Use cupra-nickel condenser in ground
water application due to possibility of
containing high mineral and corrosive
properties
Never exceed the recommended water flow
rates, as serious damage or erosion of the
water-to-refrigerant heat exchanger could
occur.
Teflon tape sealer should be used when
connecting water piping connections to the units
to insure against leaks and possible heat
exchanger fouling.
Field wiring must comply with local and
national electric codes. Properly sized fuses
or HACR circuit breakers must be installed
for branch circuit protection. See unit
nameplate for maximum fuse or breaker
size.
Power to the unit must be within the
operating voltage range indicated on
the unit nameplate or on the
performance data sheet.
Operation of unit on improper line
voltage or with excessive phase
imbalance will be hazardous to the unit,
constitutes abuse and may void the
warranty.
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