FAS-FHS-072-180-01SI Rev. A
Specifications subject to change without notice.
17
Condensate Drain
Install a trapped condensate drain line to unit connection as
shown in Fig. 11. The unit drain connection is a PVC stub.
(See Fig. 12.) Some areas may require an adapter to
connect to either galvanized steel or copper pipe. For these
applications, install a field-supplied threaded PVC adapter.
NOTE: A trap must be installed in the condensate drain line
to ensure that the static pressure of fans is balanced with
the water column in the drain line and that condensate can
drain completely from pan. Without a trap, air can be drawn
up drain line until water level in condensate pan becomes
equal to static pressure created by fans, preventing com
-
plete drainage. Conditions will worsen as filters become
dirty.
Install clean-out plugs in trap. Pitch drain line downward to
an open floor drain or sump. Provide service clearance
around drain line to permit removal of unit panels. Observe
all local sanitary codes.
As shipped, the unit’s condensate drain pan is NOT sloped
towards the drain connection. The pan slope must be
changed to pitch towards the side of the unit with the drain
connection. (See Fig. 12.) Loosen the 2 screws next to the
drain outlet at both ends of the unit, push drain pan down in
the slots near the drain connection, and up in the slots on
the opposite end. Re-tighten screws. The pan should have
a pitch of at least 1/4 in. over its length toward the drain
connection.
Fig. 11 — Condensate Drain
Fig. 12 — Drain Pan Slope Adjustment
Fan Motors and Drives
Motor and drive packages are factory installed in all units.
The motor and drive packages consist of the following
items:
1 — fan motor
1 — adjustable motor pulley
1 — fan pulley
1 — fan belt
(FAS072-120, FHS072-120 units)
2 — matched fan belts
(FAS150-180, FHS180 units)
For instructions on changing fan rotation, changing drive
speeds and adjusting drives, see “Pulley and Drive Adjust
Power Supply and Wiring
Check the unit data plate to ensure that available power
supply matches electrical characteristics of the unit. Provide
a disconnect switch with an integrated lock-out feature of
size required to provide adequate fan motor starting current.
See Tables 10-13 for unit electrical data. See Table 14 for
fan contactor coil data.
3” MIN.
[76]
NOTE: Dimensions in [ ] are in millimeters
WARNING
Failure to follow this warning could result in personal
injury or death.
Do not use gas piping as an electrical ground.
Unit cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground may
consist of electrical wire connected to unit ground lug in
control compartment, or conduit approved for electrical
ground when installed in accordance with NEC (National
Electrical Code); ANSI/NFPA 70, latest edition (in
Canada, Canadian Electrical Code CSA [Canadian
Standards Association] C22.1), and local electrical
codes.
Adjustment Slots
(Both Ends of Unit)
PVC Stub Unit
Drain Connection
