7
Ultra-Aire SD12 Installer’s & Owner’s Manual
FOR HVAC INSTALLER ONLY
3.3 Line Set Installation
The installer must supply a line set (1/4” liquid line, 3/8” gas line)
suitable for use with R410a refrigerant to connect the indoor unit to
the outdoor unit.
The maximum allowable length of the line set
is 50 feet.
The installer must braze the lines to the dehumidifier
and the condensing unit. The gas (suction) line must be insulated to
prevent the formation of condensation on the outside of the line.
Line Set Isolation — See FIGURE 7 for examples of proper refrigerant
line set installation.
When installing the line set:
• Make sure the lines are suitable for use with R410a.
• Do not crush the lines and always allow a minimum bend radius of
2 inches.
• Keep the ends of the lines covered to prevent dirt and debris from
entering the lines during installation.
• Secure the line set to the building with isolating hardware to
prevent vibration transmission to the building.
• Seal and isolate the opening(s) where the line set is routed into the
building.
• Insulate the gas (suction) line to prevent water condensation on the
gas line.
• Flush the lines with an inert gas before and/or during brazing to
prevent oxidation inside the lines.
• Release the inert gas holding charge and remove the plugs in the
dehumidifier lines before brazing.
• Do not overheat the lines connected to the dehumidifier or the
condensing unit when brazing.
• Be aware of the relative location of the dehumidifier (Indoor unit)
and condensing unit (Outdoor Unit) when installing the line set.
See illustrations below:
30 FT
MAX
CONDENSING
UNIT
DEHUMIDIFIER
Line Set Isolation — The following illustrations are examples of proper refrigerant line set isolation.
REFRIGERANT LINE SET — TRANSITION
FROM VERTICAL TO HORIZONTAL
REFRIGERANT LINE SET — INSTALLING
HORIZONTAL RUNS
To hang line set from joist or rafter, use either metal
strapping material or anchored heavy nylon wire ties.
ANCHORED HEAVY NYLON
WIRE TIRE OR AUTOMOTIVE
MUFFLER-TYPE HANGER
AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
STRAP LIQUID LINE TO
VAPOR LINE
LIQUID LINE
VAPOR LINE-WRAPPED
IN ARMAFLEX
NON-CORROSIVE
METAL SLEEVE
VAPOR LINE WRAPPED
WITH ARMAFLEX
LIQUID LINE
CALK
PVC
PIPE
FIBERGLASS
INSULATION
OUTSIDE
WALL
8 FEET
STRAPPING
MATERIAL (AROUND
VAPOR LINE ONLY)
WIRE TIE (AROUND
VAPOR LINE ONLY)
TAPE OR
WIRE TIRE
NON-CORROSIVE
METAL SLEEVE
8 FEET
TAPE OR
WIRE TIRE
FLOOR JOIST OR
ROOF RAFTER
FLOOR JOIST OR
ROOF RAFTER
STRAP THE VAPOR LINE TO THE
JOIST OR RAFTER AT 8 FEET
INTERVALS THEN STRAP THE LIQUID
LINE TO THE VAPOR LINE.
Line Set Isolation — The following illustrations are examples of proper refrigerant line set isolation.
REFRIGERANT LINE SET — TRANSITION
FROM VERTICAL TO HORIZONTAL
REFRIGERANT LINE SET — INSTALLING
HORIZONTAL RUNS
To hang line set from joist or rafter, use either metal
strapping material or anchored heavy nylon wire ties.
ANCHORED HEAVY NYLON
WIRE TIRE OR AUTOMOTIVE
MUFFLER-TYPE HANGER
AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
STRAP LIQUID LINE TO
VAPOR LINE
LIQUID LINE
VAPOR LINE-WRAPPED
IN ARMAFLEX
NON-CORROSIVE
METAL SLEEVE
VAPOR LINE WRAPPED
WITH ARMAFLEX
LIQUID LINE
CALK
PVC
PIPE
FIBERGLASS
INSULATION
OUTSIDE
WALL
8 FEET
STRAPPING
MATERIAL (AROUND
VAPOR LINE ONLY)
WIRE TIE (AROUND
VAPOR LINE ONLY)
TAPE OR
WIRE TIRE
NON-CORROSIVE
METAL SLEEVE
8 FEET
TAPE OR
WIRE TIRE
FLOOR JOIST OR
ROOF RAFTER
FLOOR JOIST OR
ROOF RAFTER
STRAP THE VAPOR LINE TO THE
JOIST OR RAFTER AT 8 FEET
INTERVALS THEN STRAP THE LIQUID
LINE TO THE VAPOR LINE.
4033179
1
COMPRESSOR
COND.
RELAY
COND.
RELAY
COIL
115 VAC
LINE NEUTRAL
BLK
RED
BRN
WHT
BLK
BRN
RED
WHT
RUN
CAP.
WHT
BLK
BLK
3
4
5
6
7
RUN
CAP.
BLOWER
24VAC SIGNAL
FROM DEHU.
2
S
C
R
1
3
FIGURE 6: CONDENSING UNIT WIRING DIAGRAM
FIGURE 7A: REFRIGERANT LINE SET – TRANSITION
FROM VERTICAL TO HORIZONTAL
FIGURE 7B: REFRIGERANT
LINE SET THROUGH
OUTSIDE WALL
FIGURE 7C: REFRIGERANT LINE SET –
INSTALLING HORIZONTAL RUNS
FIGURE 8A
Summary of Contents for 4033170
Page 24: ......
