5
PN 20009722 REV F, [08/01/2020]
GENERAL PRODUCT INFORMATION
Product Description
• Available in three cabinet sizes with six output capacities
from 8,000–36,000 Btuh.
• Available in 115 Vac and 208/230 Vac.
•
2 pipe or 4 pipe configurations.
• Factory installed electric heat option (2 pipe only). No
field installed electric heat kits are available.
• Designed for low noise levels, easy installation, easy
maintenance and slim line fascia, insure minimum
intrusion into conditioned environment.
•
Galvanized steel cabinet with fire-resistant thermal and
acoustic foam insulation.
•
Expanded polystyrene drain pan, fire retardant
thermoplastic liner.
• 24Vac wall thermostat connections, thermostat not
included.
• Optional hand held remote infrared controller available.
• Controls also feature anti-short-cycle timer, post purge
fan relay, and an on-board 30 amp electric heat relay.
• 24Vac Transformer. See thermostat requirements in this
manual.
• Light grey high-impact ABS fascia.
• All units can be operated using wall thermostat.
Remote Thermostat Application (Wall mounted)
• Units require remote thermostat for operation. On-board
controller is not included.
•
Controller offers limited options when operated by
remote thermostat.
(Optional) Infrared Hand Held Remote Thermostat
Applications
• Infrared hand held remote uses a custom control board
featuring programmability, configuration and multiple
modes of operation.
• Units include on-board microprocessor controller with
infrared hand held remote.
• Infrared hand held remote is required to adjust settings
and configure controller.
• Bank of DIP switches for setting operation is included.
• Custom control board featuring programmability,
configuration, and multiple modes of operation.
•
Configurable for wall thermostat operation.
Air Systems
•
User accessible permanent, washable, filter which may
be vacuum cleaned.
• Branch duct knockouts on three sides for remote
discharge locations; use two non-adjacent sides.
• Fresh air intake capability with two knockout locations
• Four plastic air vanes, motor driven with auto sweep
or fixed position stop setting on models 18-36. Models
08–12 are equipped with manually-adjusted air vanes.
• Fans are backward curved impeller centrifugal design:
dynamically and statically balanced; and mounted on
integral mounting rails.
--Single fan models 08, 12, 18 and 20 are designed
with fire-retardant plastic or aluminum impellers.
--Twin fan models 33 and 36 are designed with fire
retardant plastic impellers.
--Multispeed motors are enclosed type with thermal
protection and sealed bearings.
Coil
• Coil is seamless, copper tubing, arranged in staggered
configuration, with enhanced aluminum fins, tested to
250 psig.
• Tubes are mechanically expanded for secure bonding to
fin shoulder.
System Options
• 24 Vac wall thermostat.
• Electric Heat (@ 230 Vac) - Chilled water only (2 pipe).
–– 1.5 kW — models 8–12
–– 3 kW — models 18-20
–– 5 kW — models 33-36
Mechanical Characteristic
Metal framed filters are fitted, reusable.
Condensate Pump
•
Carries water out of unit. Pump is fixed to mounting
bracket, can be withdrawn from side of chassis.
Inspection hole allows visual check of pump during
operation.
•
Float switch stops cooling action, shuts off chilled water
valve if pump becomes blocked or fails.
• Pump total lift is 36” (0.9 m) or less measured from
base or bottom of unit.
Air Vanes
• Manually adjustable air outlet vanes models 08-12 or
electric motor driven on models 18-36.
• Motorized air vanes can be set to auto sweep or stopped
in fixed position.
Fresh Air Connection
• May introduce fresh air to unit by addition of ducts
connected to fresh air knockouts on cassette case.
• Manufacturer recommended maximum length is 10’
(3 m) of 4” (0.1 m) diameter duct. Fresh air volume is
approximately 7–10% of unit’s published maximum air
flow if more than 10% make up air is needed fresh air
booster fan is required.
Heating
•
Cassette may be fitted with optional electric heaters
equipped with over temperature limit switches or as 4
pipe unit with separate hot water coil.
