1.
Refer to the instructions supplied with the evaporator coil.
2.
When installing the evaporator, refer to page 8 for condenser
evaporator match-up. The evaporator should be installed in
an insulated plenum of proper size to accommodate the coil,
whether it be of the “A” coil or “H” coil type design. Be sure
no air can bypass the coil as this can seriously hamper unit
operation.
3.
Install condensate drain as shown below. Use drain
connection size or larger.
4.
Emergency drain facilities SHALL be installed on any
application where water damage may occur due to overflow,
leaking or sweating of condensate drain pan.
DO NOT OPERATE WITHOUT TRAP. UNIT MUST BE LEVEL OR SLIGHTLY INCLINED TOWARD DRAIN.
EVAPORATOR & CONDENSATE DRAIN
REFER TO THE CHARTS ON PAGE 8 FOR THE
RECOMMENDED TUBE O.D. SIZES ON LIQUID AND
SUCTION LINES.
Undersized line sets will increase the refrigerant pressure drop
between the indoor evaporator and outdoor unit, resulting in a
decrease in system capacity. Oversizing the line sets may result in
excessive refrigerant charge, thereby making the system more
susceptible to liquid migration.
Condensing units are available with pre-charged, sweat-type copper
connecting fittings.
COPPER SUCTION & LIQUID LINES
1
. Remove the valve core from the
schrader port. Wrap a wet rag around the
copper stub. Flux the joint and braze with
silphos rod containing at least 10%
silver. DO NOT USE SOFT SOLDER.
Replace the valve core after brazing.
2. Leak-check all braze joints at
approximately 80 psi pressure, purge,
and evacuate the lines. NOTE: DO NOT
USE AIR TO LEAK-CHECK BRAZE
JOINTS. DRY NITROGEN SHOULD BE
USED.
3. This is not a back-seating valve. To open
the valve cap, use an adjustable wrench.
To open the valve, insert a hex wrench
(
3
/
16
" for the liquid line,
5
/
16
" for the vapor
line) into the stem and back out
counterclockwise until the valve stem
just touches the retaining ring. Do not
over tighten.
4. Replace the valve cap finger-tight, then
tighten an additional
1
/
12
turn or
1
/
2
hex
flat. A metal-to-metal seal is now
complete.
SWEAT-TYPE CONNECT FITTINGS
EVACUATION:
If the installer is making up his own line sets, he
SHALL make sure the tubing is clean of any impurities or moisture.
To ensure a clean system, free of any contaminants, purging with dry nitrogen
and a deep vacuum is necessary on all sweat-type models and on the uncharged
portions of all models not incorporating precharged lines. It is desirable to pull a
vacuum to 1,000 microns (29.96" Hg) to ensure trouble-free operation of the system.
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