Unitary products group HF-25 - 25 Ton, Руководство по установке, Страница: 10 / 36

278806-BIM-A-1106
10 Unitary Products Group
REFRIGERANT MAINS
Many service problems can be avoided by taking ade-
quate precautions to provide an internally clean and
dry system and by using procedures and materials that
conform to established standards.
Use hard drawn copper tubing where no appreciable
amount of bending around pipes or other obstructions
is necessary. If soft copper is used, care should be
taken to avoid sharp bends that may cause a restric-
tion.
Pack fiberglass insulation and a sealing material such
as permagum around refrigerant lines where they pen-
etrate a wall to reduce vibrations and to retain some
flexibility.
Support all tubing at minimum intervals with suitable
hangers, brackets or clamps.
Braze all copper-to-copper joints with Silfos-5 or equiv-
alent brazing material. Do not use soft solder.
Insulate all suction lines with a minimum of 1/2" ARMA-
FLEX or equal. Liquid lines exposed to direct sunlight
and/or high temperatures must also be insulated.
Never solder suction and liquid lines together. They
can be taped together for convenience and support
purposes, but they must be completely insulated from
each other.
The liquid and suction connections permit leak testing,
evacuation, and partial charging of the field piping and
the evaporator without disturbing the condenser coils
during initial installation.
Before beginning installation of the mains, be sure that
the unit has not developed a leak in transit. If pressure
still exists in the system, it can be assumed to be leak
free. DO NOT release the holding charge.
A filter-drier MUST be field-installed in the liquid line of
every system to prevent dirt and moisture from damag-
ing the system. Properly sized filter-driers are shipped
with each condensing section.
NOTE: Installing a filter-drier does not eliminate the
need for the proper evacuation of a system
before it is charged.
A field-installed moisture indicating sight-glass should
be installed in the liquid line(s) between the filter-drier
and the evaporator coil. The moisture indicating sight-
glass can be used to check for excess moisture in the
system or used as a visual means to verify refrigerant
charge.
All lines have a copper disc brazed over the end. Also,
if the unit does not have service valves, the holding
charge must be reclaimed to allow the installer to con-
nect piping. The temperature required to make or break
a brazed joint is sufficiently high to cause oxidation of
the copper unless an inert atmosphere is provided.
NOTE: Dry Nitrogen should flow through the system at
all times when heat is being applied and until
the joint has cooled.
TABLE 5: ELECTRICAL DATA
Unit Model
Designation
Compressor Fan Motor
Unit
Ampacity
(Amps)
Max. Fuse
Size
(Amps)
Min.
Disconnect
Size
Power Supply Qty.
RLA
(each)
LRA
(each)
Power Supply HP Qty. FLA (each)
HF-25
2 208/230-3-60 2 47.1 350.0 208/230-3-60 1.25 4 4.5/4.3 124.6 150 150
4 460-3-60 2 25.0 158.0 460-3-60 1.25 4 2.15 64.9 80 70
5 575-3-60 2 19.9 125.0 575-3-60 1.25 4 1.7 51.9 70 60
HL-30
2 208/230-3-60 4 32.1 195.0 208/230-3-60 1.25 4 4.5/4.3 154.4 175 175
4 460-3-60 4 16.4 95.0 460-3-60 1.25 4 2.15 78.3 90 90
5 575-3-60 4 12.1 80.0 575-3-60 1.25 4 1.7 58.2 70 70
HL-40
2 208/230-3-60 4 42.0 239.0 208/230-3-60 1.50 4 5.8 201.7 225 225
4 460-3-60 4 19.2 125.0 460-3-60 1.50 4 2.9 93.2 110 110
5 575-3-60 4 13.8 80.0 575-3-60 1.50 4 2.2 67.5 80 80
HL-50
2 208/230-3-60 4 47.1 350.0 208/230-3-60 1.50 4 5.8 224.7 250 250
4 460-3-60 4 25.0 158.0 460-3-60 1.50 4 2.9 117.9 125 150
5 575-3-60 4 19.9 125.0 575-3-60 1.50 4 2.2 93.4 110 110