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4
Step 3 — Install Condensate Drain Line and
External Trap —
Condensate drain connections are locat-
ed at the bottom and end of the unit. Unit discharge connec-
tions do not determine the use of drain connections;
either drain connection can be used in vertical or horizontal
applications.
When using the standard end drain connection, make sure
the plug in the alternate bottom connection is tight before in-
stalling the unit.
To use the bottom drain connection for a roof curb installa-
tion, relocate the factory-installed plug from the bottom con-
nection to the end connection. See Fig. 3. The piping for the
condensate drain and external trap can be completed after the
unit is in place.
All units must have an external trap for condensate drain-
age. Install a trap at least 100 mm (4-in.) deep and protect
against freeze-up. If drain line is installed downstream from the
external trap, pitch the line away from the unit at 25 mm per
3 m (1 in. per 10 ft) of run. Do not use a pipe size smaller than
the unit connection.
Step 4 — Rig and Place Unit —
Inspect unit for
transportation damage. File any claim with transportation
agency. Keep unit upright and do not drop. Spreader bars are
not required if top crating is left on unit. Rollers may be used to
move unit across a roof. Level by using unit frame as a
reference. See Tables 1A and 1B and Fig. 4 for additional in-
formation. Operating weight is shown in Tables 1A and 1B and
Fig. 4.
Lifting holes are provided in base rails as shown in Fig. 4
and 5. Refer to rigging instructions on unit.
POSITIONING — Maintain clearance around and above unit
to provide proper airflow and service access. See Fig. 5.
Position unit on roof curb so that the following clearances
are maintained: 7 mm (
1
/
4
-in.) clearance between roof curb and
base rails on left side and in back and front of unit; 84 mm
(3
5
/
16
-in. clearance between roof curb and duct end of unit (see
Fig. 2, section C-C).
Do not install unit in an indoor location. Do not locate unit
air inlet near exhaust vents or other sources of contaminated
air.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
After unit is in position, remove polyethylene shipping
wrapper and rigging skid.
NOTES:
1. Dimension in ( ) is in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail
“
A.
”
Holes in
base rails are centered around the unit center of gravity. Use wooden top skid
when rigging to prevent rigging straps from damaging unit.
3. Unit weights do not include economizer. See Table 1A and 1B for economizer
weights.
All panels must be in place when rigging.
Fig. 4 — Rigging Details
50TFQ
OPERATING
WEIGHT
A
B
C
Lb
Kg
in.
mm
in.
mm
in.
mm
008
940
426
77.42
1966.5
41.5 1054
42.12
1070
009
965
438
77.42
1966.5
41.5 1054
42.12
1070
012
1015
460
77.42
1966.5
41.5 1054
42.12
1070
DRAIN PLUG
NOTE: Drain plug is shown in factory-installed position.
Fig. 3 — Condensate Drain Location
CONDENSATE PAN (SIDE VIEW)