Carrier 16DF013-050 Electrical Connections, Initial Solution and Refrigerant Charging

Connect Rupture Disc Piping Ð Vent rupture disc to the outside of the building for safety. Model 16DF ma- chines sometimes are factory equipped with a rupture disc assembly on the generator-vapor transfer area.

1.Add a ¯exible connection and adequate support to pipe, as required, to eliminate any piping stress on rupture disc. Provide ®ttings so vent piping can be disconnected pe- riodically for inspection of disc. Provide pipe plug on out- let side of relief device for leak testing.

2.Cover outdoor vent with a rain cap to prevent excessive moisture from entering the vent line.

3.Place a condensate drain at the low point in the piping to prevent any water build-up on the atmospheric side of the disc assembly.

Connect Fuel Piping Ð Connect fuel lines to burner fuel system and install separate fuel ®ttings using job data, piping drawings, and general guidelines found in the burner manual supplied by the burner manufacturer. Installation re- quirements will vary for local building and insurance codes, and for different application conditions.

Do not use Te¯on Tape as an oil or gas pipe sealant. Tape can cause valves to fail, creating a safety hazard. Use a pipe joint compound.

1.Use a full size dirt pocket or trap in gas piping ahead of the main manual shutoff.

2.Piping must be sized to provide the minimum speci®ed oil or gas pressure at the main manual shutoff when op- erating at the maximum input.

3.A 2-pipe system with suction and return lines must be used for oil burners, and the lines should be run in a trench or under the ¯oor when possible. Copper tubing with flare ®ttings should be used for oil lines.

4.Hand valves must not be installed on discharge side of oil pump or return line without a bypass relief installed to the tank. An oil shut-off valve should be provided in the suction line near the burner.

5.Oil suction lines should be pitched back slightly to the tank and care should be taken to avoid any air traps in the line.

6.The fuel system must be pressure tested with air or inert gas and proven leak tight. Gas systems should be tested for at least 3 times the gas pressure that will be used.

Connect Exhaust Duct Ð Connect combustion ex- haust ducting using job data and piping drawings. Systems will vary for different application conditions.

1.Sharp bends and restrictions should be avoided to allow smooth gas ¯ow.

2.The outlet should be arranged to prevent rainwater entry into the machine exhaust, and drains should be provided to remove condensate or water.

3.Exhaust gas dampers and draft regulators must be in- stalled correctly for proper operation.

Most of the machine surfaces become hot during the heat- ing cycle and those areas should be insulated with heat- resistant material. High-temperature, ®re resistant material should be used in areas near the burner, refractory door, and exhaust. All wiring should be external to the ®nished insu- lation. The insulation should be applied so all ¯anged serv- ice connections can be easily opened, and all valves, con- trols, and sensor locations should be easily accessible.

Final Paint Coat (If Required) Ð Paint machine as indicated in job data, after installation assembly, leak test- ing, and insulation have been completed. Use speci®ed paint, making sure only high-temperature paint is applied to areas with hot surfaces.

ELECTRICAL CONNECTIONS

Field wiring must be installed in accordance with job and machine/burner wiring diagrams, and all applicable electri- cal codes.

Check Available Power Supply and Safety- Interlocks Ð Available power supply and safety inter- locks must match the machine equipment. Job voltage, am- perage, and values are stated on the machine and burner wiring diagrams.

Machine Control Panel External Wiring Ð All machine sensors and controls are factory installed. External ®eld wiring connections to machine control panel wiring ter- minals include:

·three-phase power supply

·control start/stop interlocks for chilled/hot water pump(s), cooling water pump(s), and cooling tower fan(s)

·high-temperature generator sensors on machines shipped in 2 pieces

·remote start/stop (when used)

·remote status indicators (when used)

Burner Control Panel Wiring Ð Field wiring con- nections between wiring terminals in the machine and burner control panels include:

·three-phase blower motor and oil pump motor power sup- ply

·burner control power supply and burner start/stop signal

·open/close signals for ®ring rate positioning motor

·burner alarm and ®ring rate limit position signals for machine/ burner vs chiller heater microprocessor controls

There are also ®eld wiring connections between the high- stage generator's low-level probe and its relay contacts in the burner control panel, and between the burner control panel and the fuel line connector box.

INITIAL SOLUTION AND REFRIGERANT

CHARGING

Lithium bromide solution and refrigerant (water) will be placed in the machine at initial start-up. Do not charge so- lution into the machine until the unit is ready for operation.

INSULATION AND PAINT

Insulation (If Required) Ð Apply insulation as in- dicated in job data, after machine assembly and ®eld piping have been completed. If shipping vacuum or pressure test indicate possible leakage, do not apply insulation until leak has been corrected.

Copyright 1992 Carrier Corporation

Do not start any pump motors until the machine has been charged with solution and refrigerant. The hermetic pumps can be seriously damaged by dry operations.

Refer to 16DF Start-up, Operation, and Maintenance In- structions for charging procedures.

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book	2	PC 211	Catalog No. 531-602	Printed in U.S.A.	Form 16DF-1SI	Pg 12	3-92	Replaces: New
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