30
2.6.5 Pressure transducers
Pressure transducers are used to measure and control the pressures in the unit. These electronic sensors deliver
0 to 5 VDC. The transducers can be calibrated through the controller. The pressure transducers are connected to
the IOBs.
Wiring information (see chiller wiring diagram)
5VDC – low refr. Pressure range
5VDC – low refr. Pressure range
5VDC – low refr. Pressure range
5VDC – low refr. Pressure range
5VDC – low refr. Pressure range
5VDC – low refr. Pressure range
5VDC – low refr. Pressure range
Entering Evap water
pressure
5VDC – water side pressure range
Leaving Evap water
pressure
5VDC – water side pressure range
Entering Cond water
pressure
5VDC – water side pressure range
Leaving Cond water
pressure
5VDC – water side pressure range
Table 1b – Pressure sensors
3. INSTALLATION
3.1 Introduction
The 19DV machines are factory assembled, wired, leak tested and electrically tested. Installation (not by Carrier)
consists primarily of establishing water and electrical services to the machine. The rigging, installation, field wiring,
field piping, and insulation of waterbox covers are the responsibility of the contractor and/or customer.
3.2 Step 1 – Receive the machine
3.2.1 – Inspect the product delivered
CAUTION: Do not open any valves or loosen any connections. The standard 19DV machine is shipped with a full
refrigerant charge. Some machines may be shipped with a nitrogen holding charge as an option. Damage to
machine may result.
1. Inspect for shipping damage while machine is still on shipping conveyance. If machine appears to be
damaged or has been torn loose from its anchorage, have it examined by transportation inspectors before
removal. Forward claim papers directly to transportation company. Manufacturer is not responsible for any
damage incurred in transit.
2. Check all items against shipping list. Immediately notify the nearest Carrier representative if any item is
missing.
3. To prevent loss or damage (standard EN 378-2 11.22 k, annex A and B), leave all parts in original packages
until beginning installation. All openings are closed with covers or plugs to prevent dirt and debris from
entering machine components during shipping. A full operating inhibitor charge is placed in the
lubrication assembly before shipment. from the factory. Do not open lube assembly valves until unit is fully
charged with refrigerant.
3.2.2 – Identify machine
Confirm that the unit received is the one ordered. Compare the name plate data with the order. The unit name
plate must include the following information:
-- Service number
-- Serial number
-- Model number
-- Variant
-- Year of manufacture and test date
-- CE marking
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