Lrp16Hp - Lennox LRP16G Installation Instructions Manual

Condensate Drain
Drain lines should be hand-tightened only. Do not use
tools to tighten fitting into drain.
This package unit is equipped with a 3/4" FPT coupling
for condensate line connection. Plumbing must conform
to local codes. Use a sealing compound on male pipe
threads.
Minimum Pitch
1 in. (25 mm)
per 10' (3 m) of line
OPEN
VENT
Trap must be deep enough to offset maximum
static difference (generally, 3 inches (76mm)
minimum). In addition, the drain lines must be
supported if longer than 10 feet.
Trap must be primed at start-up.
Figure 10. Typical Condensate Drain Connection
CAUTION
UNIT
MOUNTING
FRAME

LRP16HP

Do not operate unit without a drain trap. The condensate
drain is on the negative pressure side of the blower;
therefore, air being pulled through the condensate line will
prevent positive drainage without a proper trap.
The condensate drain line must be properly trapped,
routed to a suitable drain and primed prior to unit
commissioning.
NOTE: Install drain lines and trap so they do not block
service access to the unit.
See Figure 4 for proper drain arrangement. The drain line
must pitch to an open drain or pump to prevent clogging
of the line. Seal around the drain connection with suitable
material to prevent air leakage into the return air system.
To prime trap, pour several quarts of water into drain,
enough to fill drain trap and line.
Crankcase Heater (if used)
Some models may be equipped with a crankcase heater
to prevent excessive migration of liquid refrigerant into the
compressor during off cycles. Power must be maintained
to the unit to keep this feature active.
Except as required for safety while servicing, do not open
the system disconnect switch.
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