7
When unit is located adjacent to public walkways, flue assem-
bly must be at least 7 ft (2.1 m) above grade.
Select a unit mounting system that provides adequate height
to allow installation of condensate trap per requirements. Refer
to Step 11 — Install External Condensate Trap and Line – for
required trap dimensions.
ROOF MOUNT — Check building codes for weight distribu-
tion requirements. Unit operating weight is shown in Table 2.
Step 2 — Plan for Sequence of Unit Installa-
tion —
The support method used for this unit will dictate dif-
ferent sequences 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 fol-
lowing 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 in-
structions for details)
4. Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 11 for de-
tails)
5. Rig and place unit
6. Install outdoor air hood
7. Install flue hood
8. Install gas piping
9. Install condensate line trap and piping
10. Make electrical connections
11. Install other accessories
PAD-MOUNTED INSTALLATION
1. Prepare pad and unit supports
2. Check and tighten the bottom condensate drain connec-
tion 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 flue hood
8. Install gas piping
9. Install condensate line trap and piping
10. Make electrical connections
11. Install other accessories
FRAME-MOUNTED INSTALLATION — Frame-mount-
ed applications generally follow the sequence for a curb instal-
lation. Adapt as required to suit specific installation plan.
Step 3 — Inspect Unit —
Inspect unit for transporta-
tion 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.
Step 4 — Provide Unit Support
ROOF CURB MOUNT — Curb should be level. This is nec-
essary for unit drain to function properly. Unit leveling toler-
ances are show in Fig. 4. Refer to Accessory Roof Curb Instal-
lation Instructions for additional information as required.
Fig. 4 — Unit Leveling Tolerances
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.
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.
Install insulation, cant strips, roofing felt, and counter flash-
ing as shown. Ductwork must be attached to curb and not to the
unit. The accessory thru-the-base power and gas connection
package must be installed before the unit is set on the roof curb.
If field-installed thru-the-roof curb gas connections are desired,
use factory-supplied
1
/
2
-in. pipe coupling and gas plate assem-
bly to mount the thru-the-roof curb connection to the roof curb.
Gas connections and power connections to the unit must be
field installed after the unit is installed on the roof curb.
If electric and control wiring is to be routed through the
basepan, attach the accessory thru-the-base service connections
to the basepan in accordance with the accessory installation
instructions.
SLAB MOUNT (HORIZONTAL UNITS ONLY) — Pro-
vide 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
three equally spaced 4-in. x 4-in. (102 mm x 102 mm) pads on
each side.
Table 2 — Operating Weights
A
B
C
A TO B
in. (mm)
B TO C
in. (mm)
A TO C
in. (mm)
0.5 (13)
1.0 (25)
1.0 (25)
48TC
UNITS — lb (kg)
A04
A05
A06
A07
Base Unit
438 (199)
494 (224)
524 (238)
607 (275)
Economizer
35 (16)
35 (16)
35 (16)
35 (16)
Humidi-MiZer
®
System
15 (7)
15 (7)
15 (7)
24 (7)
Cu Fins
25 (11)
43 (20)
56 (25)
73 (33)
Powered Outlet
32 (15)
32 (15)
32 (15)
32 (15)
Curb
14-in. (356 mm)
110 (50)
110 (50)
110 (50)
110 (50)
16-in. (610 mm)
145 (66)
145 (66)
145 (66)
145 (66)
Summary of Contents for WeatherMaker 48TC 04
Page 4: ...4 Fig 2 Unit Dimensional Drawing ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing cont ...
Page 21: ...21 Fig 34 48TC B07 Unit with Humidi MiZer Adaptive Dehumidification System Humidistat Wiring ...
Page 39: ...39 Fig 45 PremierLink Wiring Schematic ...
Page 40: ...40 Fig 46 PremierLink Wiring Schematic with Humidi MiZer System ...
Page 48: ...48 Fig 65 Typical RTU Open System Control Wiring Diagram ...
Page 49: ...49 Fig 66 Typical RTU Open System Control Wiring Diagram with Humidi MiZer System ...
