Magic Aire HHA Series, Инструкция по установке, эксплуатации и обслуживанию

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035-000029-001 Page 26 HHA IOM 1.4 10/11/2021
Condensate Drain — To pre-
vent excessive build-up of con-
densate in drain pan, adequate
trap clearance (trap depth) must
be provided beneath the unit as
indicated in Fig. 6.
Install a trapped condensate
drain line at unit drain connec-
tion. All HHA units have a 3/4 in.
FPT condensate main and auxil-
iary drain connections.
Measure maximum design nega-
tive static pressure upstream
from the fan. Referring to Fig. 6,
height “H” must be equal to or
larger than negative static pres-
sure at design operating condi-
tions. Prime enough water in trap
to prevent losing seal
(Differential 1). When the fan
starts, Differential 2 is equal to
the maximum negative static
pressure.
Provide freeze-up protection as
required to insure reliable con-
densate drainage. Freeze pro-
tection measures are customer-
supplied and installed.
Fig. 6 — Condensate Drain
Water Coil Piping Recommendations
Water coils are piped by connecting the
supply at the bottom and the return at
the top. This is “counterflow” piping ar-
rangement and is necessary to achieve
rated thermal performance.
CAUTION! Piping the other way
(parallel) will result in reduced thermal
performance!
Coil Venting: Water coils are not provid-
ed with venting devices. Insure that the
circulating water system has proper air
venting capability. If vents are required
at the coil, install them in the field piping
attached to the return (upper) connec-
tion.
WARNING - AUXILIARY DRAIN PAN
RECOMMMENDED:
This product has an auxiliary condensate
drain which should be piped to a condensate
overflow sensor or safe drain location or both
to protect the equipment and property from
damage in the case of condensate overflow.
See page 5 for additional information.
CAUTION
To prevent damage to the coil or coil headers:

Do not use the headers to lift the coil.

Use straps around the coil casing to lift and
place the coil.

Support the piping and coil connections inde-
pendently.

Do not use the coil connections to support
piping.

When tightening coil connections, use a back-
up wrench on the coil connection stub-out.
INSTALLATION-Piping