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9
ROOF MOUNT
Check building codes for weight distribution requirements.
Unit operating weight is shown in Table 2.
Table 2 — Operating Weights
Step 2 — Plan for Sequence of Unit Installation
The support method used for this unit will dictate different se-
quences for the steps of unit installation. For example, on curb-
mounted units, some accessories must be installed on the unit
before the unit is placed on the curb. Review the following for
recommended sequences for installation steps:
CURB-MOUNTED INSTALLATION
1. Install curb.
2. Install field-fabricated ductwork inside curb.
3. Install accessory thru-base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details).
4. Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 10 — Install
External Condensate Trap and Line on page 14 for
details).
5. Rig and place unit.
6. Install outdoor air hood.
7. Install condensate line trap and piping.
8. Make electrical connections.
9. Install other accessories.
PAD-MOUNTED INSTALLATION
1. Prepare pad and unit supports.
2. Check and tighten the bottom condensate drain connection
plug.
3. Rig and place unit.
4. Convert unit to side duct connection arrangement.
5. Install field-fabricated ductwork at unit duct openings.
6. Install outdoor air hood.
7. Install condensate line trap and piping.
8. Make electrical connections.
9. Install other accessories.
FRAME-MOUNTED INSTALLATION
Frame-mounted applications generally follow the sequence for
a curb installation. Adapt the sequence as required to suit spe-
cific installation plan.
Step 3 — Inspect Unit
Inspect unit for transportation damage. File any claim with
transportation agency.
Confirm before installation of unit that voltage, amperage and
circuit protection requirements listed on unit data plate agree
with power supply provided.
On units with hinged panel option, check to be sure all latches
are snug and in closed position.
Locate the carton containing the outside air hood parts. Do not
remove carton until unit has been rigged and located in final
position.
Step 4 — Provide Unit Support
ROOF CURB MOUNT
Accessory roof curb details and dimensions are shown in
Fig. 5. Assemble and install accessory roof curb in accordance
with instructions shipped with the curb.
Curb should be level. This is necessary for unit drain to func-
tion properly. Unit leveling tolerances are shown in Fig. 6. Re-
fer to Accessory Roof Curb Installation Instructions for addi-
tional information as required.
Install insulation, cant strips, roofing felt, and counter flashing
as shown.
Ductwork must be attached to curb and not to the
unit. The accessory thru-the-base power connection package
must be installed before the unit is set on the roof curb.
If electric and control wiring is to be routed through the base-
pan, attach the accessory thru-the-base service connections to
the basepan in accordance with the accessory installation in-
structions.
NOTE: The gasketing of the unit to the roof curb is critical for a
watertight seal. Install gasket supplied with the roof curb as shown
in Fig. 5. Improperly applied gasket can also result in air leaks and
poor unit performance.
SLAB MOUNT (HORIZONTAL UNITS ONLY)
Provide a level concrete slab that extends a minimum of 6 in.
(150 mm) beyond unit cabinet. Install a gravel apron in front of
condenser coil air inlet to prevent grass and foliage from ob-
structing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
ALTERNATE UNIT SUPPORT (IN LIEU OF CURB OR
SLAB MOUNT)
A non-combustible sleeper rail can be used in the unit curb
support area. If sleeper rails cannot be used, support the long
sides of the unit with a minimum of 3 equally spaced 4-in. x
4-in. (102 mm x 102 mm) pads on each side.
50HCQ
UNIT LB (KG)
A,D07
D08
D09
Base Unit
710 (322)
875 (397)
1020 (463)
Economizer
Vertical
80 (36)
80 (36)
80 (36)
Horizontal
105 (48)
105 (48)
105 (48)
Powered Outlet
32 (15)
32 (15)
32 (15)
Curb
14 in. (356 mm)
110 (50)
110 (50)
110 (50)
24 in. (610 mm)
145 (66)
145 (66)
145 (66)
Summary of Contents for 50HCQD07
Page 4: ...4 Fig 2 Unit Dimensional Drawing 07 08 Size Units ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing 07 08 Size Units cont ...
Page 6: ...6 Fig 3 Unit Dimensional Drawing 09 Size Units ...
Page 7: ...7 Fig 3 Unit Dimensional Drawing 09 Size Units cont ...
Page 24: ...24 Fig 37 Electro Mechanical Control Wiring 50HCQ A07 D07 208 230v 460v 575v ...
Page 25: ...25 Fig 38 Electro Mechanical Control Wiring 50HCQ D07 Tier 2 1 Compressor 208 230v 460v 575v ...
Page 26: ...26 Fig 39 Electro Mechanical Control Wiring 50HCQ 08 09 208 230v 460v 575v ...
Page 27: ...27 Fig 40 Electro Mechanical Power Wiring 50HCQ A07 D07 208 230v 460v 575v ...
Page 28: ...28 Fig 41 Electro Mechanical Power Wiring 50HCQ D07 Tier 2 1 Compressor 208 230v 460v 575v ...
Page 29: ...29 Fig 42 Electro Mechanical Power Wiring 50HCQ 08 09 208 230v 460v 575v ...
Page 30: ...30 Fig 43 PremierLink Wiring Schematic 50HCQ07 09 208 230v 460v 575v ...
Page 31: ...31 Fig 44 RTU Open System Control Wiring ...
Page 49: ......