Unitary products group FF-07, Руководство по установке

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035-18548-001-B-0203
Unitary Products Group 9
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DRAIN CONNECTION
The drain line MUST be trapped because the coil is
located on the negative side of the supply air blower,
and it must be protected from freezing temperatures.
A 7/8” OD drain connection extends through right hand
side of cabinet. Refer to Figure 8 for recommended
drain piping.
The drain connection is located on the same side of the
unit as the refrigerant connections. The line should be
insulated where moisture drippage will be objection-
able or cause damage to the area.
The 3” dimension must be equal or exceed the nega-
tive static pressure developed by the supply air blower.
If it does not, the condensate will not drain properly and
may overflow the drain pan. The trap must be at least
2-1/2” deep to maintain a water seal under all operating
conditions, especially during blower start-up.
NOTE:
The unit may have to be raised off the floor to
allow enough height for the trap.
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 with established standards.
Use hard drawn copper tubing where no appreciable
amount of bending around pipes or other obstructions
is necessary. Use long radius ells wherever possible
with one exception - small radius ells for any traps in a
vapor riser. If soft copper is used, care should be taken
to avoid sharp bends which may cause a restriction.
Fiber glass insulation and a sealing material such as
permagum should be packed around refrigerant lines
where they penetrate a wall to reduce vibration and to
retain some flexibility.
Support all refrigerant lines at minimum intervals with
suitable hangers, brackets or clamps.
Braze all copper to copper joints with Sil-Fos 5 or
equivalent brazing material. DO NOT USE SOFT SOL-
DER.
Never braze or solder the liquid and vapor lines
together. The complete vapor line should be insulated
with minimum 1/2” ARMAFLEX or equivalent.
If it is desirable to fasten these lines together for sup-
port purposes, they must be completely insulated, one
from the other.
Refer to the appropriate condensing unit installation
instructions for the matching outdoor unit for piping lim-
itations, line sizes, and other design considerations.
INSTALLING REFRIGERANT MAINS
The units are evacuated and dehydrated at the factory
and shipped with a holding charge of Refrigerant-22.
The suction and liquid connections are sealed with
copper discs. Refer to the appropriate condensing unit
installation instructions for charging data.
Before starting installation of the mains be sure the unit
has not developed a leak in transit by drilling a small
FIGURE 7 - RETURN AIR GRILLE ACCESSORY
(VERTICAL ARRANGEMENT SHOWN)
FIGURE 8 - RECOMMENDED DRAIN PIPING
VERTICAL
ARRANGEMENT
SHOWN