RTAD-SVX01F-E4
67
Pre-Start Checkout
Unit Piping
❏
Flush all unit water piping before
making final connections to the
unit.
CAUTION! If using an acidic
commercial flushing solution,
construct a temporary bypass
around the unit to prevent damage
to internal components of the
evaporator. To avoid possible
equipment damage, do not use
untreated or improperly treated
system water.
❏
Connect the chilled water piping to
the evaporator.
Note: On Free-Cooling units, the
chilled water piping will be
connected to the evaporator on one
side and to the 3-way valve on the
other side (see Figure 28)
❏
Install pressure gauges and
shutoff valves on the chilled water
inlet and outlet to the evaporator.
❏
Install a water strainer in the
entering chilled water line.
❏
Install a balancing valve and flow
switch (recommended) in the
leaving chilled water line.
❏
Install a drain with shutoff valve or
a drain plug on the evaporator
waterbox.
❏
Vent the chilled water system at
high points in the system piping.
❏
Apply heat tape and insulation, as
necessary, to protect all exposed
piping from freeze-up.
PHR/THR units
❏
Ensure that the heat recovery
water piping is ready to operate,
filled with water and air purged.
❏
Ensure that a water strainer is
installed.
❏
Check the position of
thermometers and manometers.
Electrical Wiring
WARNING! To prevent injury or
death, disconnect electrical power
source before completing wiring
connections to the unit.
CAUTION! To avoid corrosion and
overheating at terminal connections,
use copper conductors only.
❏
Connect the unit power supply
wiring with fused-disconnect to
the terminal block or lugs (or unit-
mounted disconnect) in the power
section of the control panel.
❏
Connect power supply wiring to
the evaporator heater.
❏
Connect power supply wiring to
the chilled water pump.
❏
Connect power supply wiring to
any auxiliary heat tapes.
❏
Connect the auxiliary contact of
the chilled water pump (6K51) in
series with the flow switch, if
installed, and then connect to the
proper terminals.
❏
For the External Auto/Stop
function, install wiring from
remote contact (6S1) to the proper
terminals on the circuit board.
❏
Check chilled water pumps
interconnection to control panel.
Note: On Free-Cooling units, for free
cooling enable output, install wiring
from remote contact (6S3) to the
proper terminals on the circuit
board.
CAUTION! Information in
Interconnecting Wiring: Chilled Water
Pump Interlock and External
Auto/Stop must be adhered to or
equipment damage may occur.
Heat Recovery units
❏
Ensure that the Heat Recovery
mode input is correctly wired (dry
contact)
❏
Check that the hot water pump
has a 3 minute time delay after the
Heat Recovery mode is switched
off.
Installation Checklist
Complete this checklist as the unit is
installed and verify that all
recommended procedures are
accomplished before the unit is
started. This checklist does not replace
the detailed Instructions given in the
"Installation -Mechanical" and
"Installation -Electrical" sections of
this manual. Read both sections
completely, to become familiar with
the installation procedures, prior to
beginning the work.
Receiving
❏
Verify that the unit nameplate data
corresponds to the ordering
information.
❏
Inspect the unit for shipping
damage and any shortages of
materials. Report any damage or
shortage to the carrier.
Unit Location and
Mounting
❏
Inspect the location desired for
installation and verify adequate
service access clearances.
❏
Provide drainage for evaporator
water.
❏
Remove and discard all shipping
materials (cartons, etc.)
❏
Install optional rubber isolators, if
required.
❏
Level the unit and secure it to the
mounting surface.
Units with hydraulic module
CAUTION!
❏
The pump must not be used to fill
the water loop.
❏
The pump must not be activated
until the system is fully filled with
water.
❏
Using the pump with absent or
unsufficient water will end up in
damaging the mechanical seal.
