44
Step 8 — Position Power Exhaust/Barometric
Relief Damper Hood —
All units are shipped with the
hoods folded inside the unit in a shipping position. For 50AJ
and AK units the hood must be tilted out once the unit is in-
stalled. On 50AW and AY units, (designed for horizontal sup-
ply and return) the assemblies will have to be relocated to re-
turn ductwork. See Fig. 36 for dimensions and details.
All electrical connections have been made and adjusted at
the factory. The power exhaust blowers and barometric relief
dampers are shipped assembled and tilted back into the unit for
shipping. Brackets and extra screws are shipped in shrink wrap
around the dampers. If ordered, each unit will have 4
(50AJ,AK,AW,AY020-050 units) or 6 (50AJ,AK,AW,AY060
units) power exhaust blowers and motors or 4
(50AJ,AK,AW,AY020-050 units) or 6 (50AJ,AK,AW,AY060
units) barometric relief dampers.
MOUNTING ANGLE
(WITHOUT TABS)
FILTER TRACK
ASSEMBLY
MOUNTING ANGLE
(WITH TABS)
Fig. 33 — Mounting Angle (Without Tabs)
Attached to Filter Track Assembly
Fig. 34 — Mounting Angle (With Tabs) Attached to
Filter Track Assembly
BLACK SEAL STRIP
(CENTERED)
FILTER COVER
Fig. 35 — Attaching Seal Strip to Filter Cover
42.56”
42” MIN.
S/A
R/A
ECONOMIZER
HOOD
ECONOMIZER
HOOD
J BOX
PLENUM RATED
CABLE
(FIELD SUPPLIED)
12.94
(UNIT
OPENING)
“END #2”
“END #1”
ALTERNATE
LOCATION
(END)
23.28”
TYP
42.62
TYP
LOCATION
BAROMETRIC RELIEF
OR POWER EXHAUST
“SIDE #2”
23.28”
“SIDE #1”
42.62”
J BOX
R/A
S/A
Fig. 36 — Side Return Air Conversion
NOTE: Sizes 020-050 shown (2 power exhaust fans). Size 060
has 3 power exhaust fans. All unit sizes have the same size
power exhaust.
Summary of Contents for 48AJ/AK/AMD020
Page 3: ...3 Fig 1 Roof Curb 50AJ AK020 035 Units...
Page 4: ...4 Fig 2 Roof Curb 50AJ AK040 050 Units...
Page 5: ...5 Fig 3 Roof Curb 50AJ AK060 Units...
Page 6: ...6 Fig 4 Reduced Supply Duct Opening Roof Curb 50AJ AK060 Units...
Page 7: ...7 Fig 5 Base Unit Dimensions 50AJ AK020 035...
Page 8: ...8 Fig 6 Base Unit Dimensions 50AJ AK040 050...
Page 10: ...10 Fig 8 Base Unit Dimensions 50AW AY020 035...
Page 11: ...11 Fig 9 Base Unit Dimensions 50AW AY040 050...
Page 32: ...32 CONTROLS OPTION BOARD Fig 19 Small Chassis Component Location Size 020 035 Units...
Page 33: ...33 CONTROLS OPTION BOARD Fig 20 Large Chassis Component Locations Size 040 060 Units...
Page 34: ...34 Fig 21 Typical Main Control Box Wiring Schematic TO NEXT PAGE TO NEXT PAGE...
Page 35: ...35 FROM PREVIOUS PAGE FROM PREVIOUS PAGE Fig 21 Typical Main Control Box Wiring Schematic cont...
Page 36: ...36 TO NEXT PAGE TO NEXT PAGE Fig 22 Auxiliary Control Box Wiring Schematic...
Page 38: ...38 Fig 23 Typical Power Schematic Size 060 Unit Shown...
Page 39: ...39 Fig 23 Typical Power Schematic Size 060 Unit Shown cont...
Page 40: ...40 Fig 24 Controls Option Wiring Schematic...
Page 41: ...41 Fig 25 Electric Heat Control Circuit Size 060 Unit Shown...
Page 47: ......