Stulz FLAIR series, Installation, Operation And Maintanance Manual

Page: 17 / 48

FLAiR Series Installation, Operation & Maintenance Manual
(©Aug, 2007)
Air Technology Systems, Inc.
2-6
CAUTION
The piping system must be flushed prior to op-
erating the system. Failure to do so will result in
equipment problems.
A strainer should be included in the glycol line. Once
the system is operational, the glycol mixture flows
through the strainer, where any foreign objects are
removed. The strainer screen should be cleaned
periodically.
2.6.3 Condensate Drain Line
2.6.3.1 Gravity Drain
A 7/8 inch OD copper (sweat type) line is stubbed out
through the cabinet to drain the condensate pan. The
installer is to connect a 7/8 inch ID drain line to direct
the water away from the cabinet. This line also drains
the optional humidifier.
NOTE
The humidifier drains (hot) water into the
condensate drain during normal operation.
The drain line must be located so it will not be ex-
posed to freezing temperatures. The diameter of the
drain line should be the full size of the connection.
2.6.3.2 Condensate Pump
An optional condensate pump is normally factory
installed with a 1/2” OD copper drain. The drain is
stubbed out through the side of the A/C unit cabinet for
the installer to connect a drain line to direct water
away from the cabinet. The drain line may be 1/2” ID
vinyl tubing or a 1/2” copper to copper sweat connec-
tion may be used.
If an optional field installed pump is selected, a p-trap
must be installed for proper condensate drainage, (see
Figure 5). The height of the trap must be a minimum of
2 inches on standard systems to ensure proper water
drainage. The condensate pump discharge line should
be 1/2 inch OD, (maximum), copper pipe to prevent
excessive back flow to the unit.
NOTE
Pour some water into the condensate drains prior
to start-up. This fills the trap and prevents air
from being drawn up the drain lines.
2.6.4 Humidifier
FLAiR systems utilize an optional, electrode steam
cylinder humidifier. The humidifier empties into the
condensate drain line during the flush/drain cycle. A
water supply line must be installed to the ¼ inch
copper tubing, which is stubbed out through the side of
the A/C unit cabinet. The humidifier operates using
normal tap water as the water supply. If the supply
water is high in particulate, an external filter may be
needed. Do not use de-mineralized water.
Refer to the humidifier operator’s manual, supplied
under separate cover with the equipment, for complete
manufacturer’s information on the humidifier and the
supply water recommendations.
INLET 7/8" OD
OUTLET 1/2" OD
NOTES:
1. MIMIMUM HEIGHT IN INCHES.
2. P-TRAP MUST BE LOCATED IN THE INLET SIDE OF PUMP WHEN FIELD INSTALLED.
2.00
SEE NOTE 1
SEE NOTE 2
Figure 5- Condensate Pump