EMI VPAC, Installation, Operation & Maintenance Manual

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The Right Fit For Comfort www.retroaire.com
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All field wiring must be done in accordance to NEC and
local codes. Check the unit rating plate for circuit ampacity
and breaker or fuse size. Use only HACR type breakers.
Select the proper wire for the ampacity rating. If a plug and
receptacle are used check the proper fit.
The unit is wired for 230V primary voltage from
the factory. The transformer must be rewired by the
installer if the jobsite voltage is 208V.
Each vertical stack unit is equipped for a 24V wall
thermostat connection. Units are shipped with a twenty
foot plenum rated thermostat wire utilizing a quick connect
plug to the unit.
STANDARD CONTROLS AND COMPONENTS
• Cooling or heat pump chassis w/high efficiency rotary
or reciprocating type compressor
• Indoor/outdoor mounting anodized outdoor louver for
field installation (optional colors available)
• Manual fresh air damper (located on service panel
below evaporator coil)
• Front mounted control box (unless otherwise specified)
• Microprocessor control board
- Fan purge: Fan remains on for 60 seconds after
heat/cool call is dropped (“Auto” mode only)
- Universal control board: circuit board can be used
in either a straight cool electric, hydronic heat, or
cooling/heat pump application.
- Anti-short cycle compressor protection
- Random start timer: prevents multiple units from
simultaneous start-ups
- Freeze protection: prevents evaporator freeze
ups
- Low ambient lockout
- Test operation: allows ease of testing after instal-
lation (all timers are eliminated)
- Compatible with fossil fuel, electric heat, mercury
or electronic thermostats
• Temperature sensitive drain pan valve for heating con-
densate disposal (VPHP only)
• Wall sleeve
OPTIONAL CONTROLS AND COMPONENTS
• Hydronic heat coil
• Electric heat coil
• Painted outdoor air louver
• Wall thermostat (digital or mercury bulb)
• Power disconnect
• EMS management relay
• Casters (for easy maneuverability )
• Return air access panel (standard white or custom
colors available)
PRODUCT DESCRIPTION
The VPAC/VPHP Single Package Vertical Air Condi-
tioner (SPVAC) and Heat Pump (SPVHP) creates new op-
tions in layout and space utilization. The VPAC/VPHP offers
low cost operation and quiet, comfortable air distribution,
especially when used in multi-room suites, apartments,
healthcare facilities, and homes.
Framed into a concealed closet enclosure for low op-
erating sound levels, the VPAC/VPHP’s vertical discharge
vent allows ducting to the top of the room(s) for superior air
circulation and distribution. Multiple air supply grilles can
distribute air when used with a soffit and intake grilles can
be located on either of the two sides of the enclosure.
The VPAC/VPHP offers an economic benefit when used
in a multi-room suite by supplying conditioned air to more
than one room without the need to install another unit. This
is also a design advantage since the second room does
not need an exterior wall for a second unit.
Each system is supplied with a ready-to-install wall
sleeve and a condenser side air louver. The cabinet is
constructed with 20 gauge galvanized steel with a G-90U
corrosion resistant rating. The unit is designed with service-
ability on three sides (front, left, and right). The insulated top
discharge evaporator compartment provides quiet ducted,
conditioned air delivery to other room location(s).
AIR SYSTEMS
Motors are thermally protected PSC type. Air stream
surfaces are insulated with 1/4 inch fiberglass or 1/8 inch
volara. The evaporator fan is a forward curved type directly
mounted to the motor shaft. The condenser propeller and
slinger ring (for condensate re-evaporation) utilize a blow-
thru design for improved efficiency.
IMPORTANT: Consult the factory if an internal
condensate drain system will be used. The standard
VPAC/VPHP is designed to evaporate condensate by
slinging it onto the warm condenser coil.
ELECTRICAL WIRING
WARNING
Before accessing the control compartment, disconnect
power to the unit. Failure to do so could result in serious
injury or electrical shock.
ELECTRICAL WIRING Continued