B – PSC Blower & Aluminum Air Coil
C – ECM Blower & Aluminum Air Coil
Non-Standard Option
Details
SS – Standard Option
Air Coil/Insulation Option
5 – AlumiSeal
TM
/Extended Range
Sound Kit
A – None
B – Blanket
Future Option
N – None
Motorized Outside Air Da
mper
(Field Installed)
N – None
M – Motorized Damper
Water Coil Option
Thermostat Control
Rev.:
N
11
31-2
NB5SS
121314
15-16
C
17
Model Nomenclature
Model
NK – Envision Series
Console 50Hz
Cabinet Configuration
C – Chassis Only
F – Chassis with CabinetS – Chassis Slope Top
E – Chassis with Extended
Slope Top
Unit Capacity
02, 03, 04, 05
Piping Option
L – Left
R – Right
Voltage
6 – 220-240/50/1
Unit Control
1 – CCM
2 – Versatec Microprocessor
4 – FX10 Std. w/o Communication
5 – FX10 w/Open N2 Com Card
6 – FX10 w/Lonworks Com Card
7 – FX10 w/BacNet Com Card
NOTES: Chassis only available with left piping option.
FX10 option is only available with remote wall-mounted thermostat control.
C – Copper
N - CuproNickel
1 – Unit Mounted T-Stat
2 – Remote Wall-Mounted T-Stat
02 March 2014D
All Envision Series product is Safety listed under UL1995 thru ETL.
4
General Installation Information
ENVISION CONSOLE - 50 HZ INSTALLATION MANUAL
Safety Considerations
WARNING: Before performing service or
maintenance operations on a system, turn off main
power switches to the indoor unit. If applicable,
turn off the accessory heater power switch.
Electrical shock could cause personal injury.
Installing and servicing heating and air conditioning
equipment can be hazardous due to system pressure and
electrical components. Only trained and qualified service
personnel should install, repair or service heating and air
conditioning equipment. Untrained personnel can perform
the basic maintenance functions of cleaning coils and
cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working
on heating and air conditioning equipment, observe
precautions in the literature, tags and labels attached to the
unit and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use a quenching cloth for brazing operations and
have a fire extinguisher available.
Moving and Storage
Move units in the normal “up” orientation. Do not stack
units. When the equipment is received, all items should be
carefully checked against the bill of lading to be sure all
crates and cartons have been received. Examine units for
shipping damage, removing the units from the packaging
if necessary. Units in question should also be internally
inspected. If any damage is noted, the carrier should make
the proper notation on the delivery receipt, acknowledging
the damage.
Refrigerant Systems
To maintain sealed circuit integrity, do not install service
gauges unless unit operation appears abnormal. Compare
the change in temperature on the air side as well as the
water side to the Unit Operating Parameters tables. If the
unit’s performance is not within the ranges listed, and the
airflow and water flow are known to be correct, gauges
should then be installed and superheat and subcooling
numbers calculated. If superheat and subcooling are outside
recommended ranges, an adjustment to the refrigerant
charge may be necessary.
Water Piping
The proper water flow must be provided to each unit
whenever the unit operates. To assure proper flow, use
pressure/temperature ports to determine the flow rate.
These ports should be located at the supply and return
water connections on the unit. The proper flow rate cannot
be accurately set without measuring the water pressure
drop through the refrigerant-to-water heat exchanger.
All source water connections on commercial units are
fittings that accept a male pipe thread (MPT). Insert the
connectors by hand, then tighten the fitting with a wrench
to provide a leakproof joint. When connecting to an open
loop (groundwater) system, thread any copper MPT fitting
into the connector and tighten in the same manner as
described above.
• Choose level flooring surface (Correctable with shims.
Do not pitch towards drain.)
• Location of wall support and fasteners required to
secure chassis backplate.
• Easy access for both installation and service.
• Consider availability and ease of wiring, water piping and
condensate drain.
• No obstructions to block airflow in front of the unit.
Step 3: Mark Unit Position
• Ensure that floor is level. If shims are required, make
sure that the entire compressor compartment area is
uniformly shimmed and that the backplate mounting
height is increased by the thickness of the shims used.
Figure 1
• Position backplate in desired equipment location. To
further reduce the operating sound level of the unit,
1/8 in. thick rubber matting may be placed under the
chassis to eliminate vibration on hard flooring surfaces.
(Make sure back plate is level).
• Mark and cut floor or wall penetrations for electrical
wiring, water and condensate piping.
Optional Electrical Disconnect and Motorized
Outside Air Damper
• Mark and cut wall penetrations for field fabricated
outside air duct sleeve.
• Align mounting holes with backplate and attach with
screws supplied.
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13
ENVISION CONSOLE - 50 HZ INSTALLATION MANUAL
Installation Steps cont.
Step 4: Provide Water and Condensate Drain
Connections
• A two-pipe reverse return piping configuration is
recommended as it equalizes the piping circuit lengths
and delivers even water flow to each unit. A direct return
piping configuration may be used, but it may be difficult
to achieve and maintain proper water flow to the units.
Pipe Locations
Figure 2
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• An air vent must be installed in the water
distribution system.
• The supply and return water piping should be run
through the wall or floor penetration and terminate with
a ball valve. The piping material used must comply with
all local codes.
• Refer to: System Cleaning and Flushing procedures.
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14
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