ICE RINK DEFOGGER
I
CE
R
INK
D
EFOGGER
MODELS
FOR APPLICATIONS FROM +80°F TO +30°F (+27°C TO -1°C
)
INSTALLATION, OPERATION AND MAINTENANCE
SERIES "IRD R404A"
IRD-050-4E
IRD-050-5E
IRD-050-7E IRD-050-8E
IRD-075-5E
IRD-075-7E IRD-075-8E
IRD-100-5E
IRD-100-7E IRD-100-8E
(208-240/1/60) (208-230/3/60) (460/3/60)
(575/3/60)
GENERAL
Thermoplus Air
packaged dehumidifiers are
designed for installation on a platform well above the
ice surface - (
Fig. 1
recommended). A large size
platform must be provided for ease of installation and
SERVICE
. The units must be suspended
at least 15
feet (4.6 m)
above the ice surface. For lower
installation, the discharge louvers must be adjusted so
that the air does not blow directly onto the ice surface.
INSPECTION
The
Thermoplus air
dehumidifier must be inspected
for damage immediately upon delivery. Any damage
must be reported immediately to the carrier. The bill of
lading must be marked "Received Damaged" and a
claim filed with the Carrier. After reception, missing
parts or damage to the unit must also be reported and
a claim must be filed with the Carrier.
Ensure that the electrical specifications on the
nameplate
correspond to the power supply voltage
requested on the purchase order
and with the
power supply available on site.
INSTALLATION
These units must be installed on a service platform 15
to 25 feet (4.6 to 7.6 m) above the ice surface. Since
these machines operate on the cooling and reheat
principle, the discharge air could cause the ice to melt
if it is too close to the ice surface. If the unit is to be
installed less than 15 feet (4.6 m) from the ice
surface, then the horizontal duct louvers (by others)
must be adjusted to direct the airflow away from the
ice surface.
It is mandatory that this unit have a 36 inch (0.9 m)
discharge duct, complete with horizontal and vertical
adjustable louvers or at least with horizontal
adjustable louvers (supplied by others). See Fig. 2.
The discharge duct and louvers must not have a static
pressure drop greater than 0.2 inch (5 mm).
Excessive pressure drop will reduce unit capacity and
cause system unbalance.
Check blower rotation. On three phase units, if it is
necessary to reverse the rotation, interchange any two
supply leads.
The unit must be level for proper condensate
drainage. A
"P"
trap must be installed on the drain
pan outlet. Drain connection is 1-1/4" MPT. On
installations where the unit is to operate at
temperature below freezing, a drain line
heater must
be wrapped around the condensate drain to
prevent freeze up.
The drain pan itself is heated to
prevent condensate freeze-up inside the unit.
Removal of the drain pan for cleaning requires
access from side opposite to drain to disconnect
the drain pan heater line.
ELECTRICAL CONNECTION
Site power supply must correspond
with the
unit
serial plate data
. All connections must be made in
accordance with local and national codes. Power line
supply must be of suitable size and adequately
protected.
Power disconnect must be installed next to the
unit.
MAINTENANCE
Units must be inspected at least twice per season.
CHECK LIST
1) Belt tension -
Check deflection at mid point between pulleys.
2) Coils -
Clean and free of dust or grease.
3) Oil on fittings -
Possible leak, contact refrigeration mechanic.
4) Drain pans -
To be free of obstructions (dirt, etc.).
5) Electrical connections -
All contacts must be tight to avoid overheating.
