Carrier 040-420 u2 TB-5, ~,. $$, 43 7, Replacing Defective Processor Module, Installation, Cwp

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S W I T C H

4 IN/4 OUT M O D U L E

CWPl (CWFS) ;-+--y---- --a TB-6

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30GN040-210 AND ASSOCIATED MODULAR UNITS

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--a-2 TBI1

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30GT225,250,280 FLOTRONIC’” II UNITS

T B - Terminal Block

NOTE: The 30GT225,250,280 Flotronic II units require the acces- sory options module for this feature

Fig. 33 - Remote Dual Set Point Control

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30GN040-210 AND ASSOClATED MODULAR UNITS

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30GT225,250,280 FLOTRONIC II UNITS

CWP - Chilled Water Pump T B - Terminal Block

NOTE: The maximum load allowed for the chilled water pump circuit is 125 va sealed, 1250 va inrush at 115 or 230 v

Fig. 34 - Chilled Water Pump

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	ALARM	SHUTOFF
	S W I T C H
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30GN040-210 AND ASSOCIATED MODULAR UNITS _d--

---- u2 TB-5

30GT225,250,280 FLOTRONIC II UNITS

TB - Terminal Block

NOTE: The maximum load allowed for the alarm circuit is 125 va sealed, 1250 va inrush at 115 or 230 v

Fig. 35 - Remote Alarm

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30GN040-210 AND ASSOCIATED MODULAR UNITS

- - - - - 7 TB-7-El

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30GT225,250,280 FLOTRONIC I I UN ITS

CWPI - Chilled Water Pump Interlock

CWFS - Chilled Water Flow Switch (not required - low flow protection is provided by Flotronic II controls)

T B - Terminal Block

NOTE: Contacts must be rated for dry circuit application, capable of reliably switching a 5 vdc, 1 mA to 20 mA load.

Fig. 36 - Interlocks

REPLACING DEFECTIVE

PROCESSOR MODULE

The replacement part number is printed on a small label on front of the PSI0 module. The model and serial num- bers are printed on the unit nameplate located on an exte- rior corner post. The proper software and unit configuration data is factory installed by Carrier in the replacement mod- ule. Therefore, when ordering a replacement processor mod- ule (PSIO), specify complete replacement part number, full unit model number, and serial number. If these numbers are not provided, the replacement module order is config- ured instead as a generic Flotronic’” 11 replacement mod- ule. This requires reconfiguration of the module by the installer.

Electrical shock can cause personal injury, Disconnect all electrical power before servicing.

Installation

1.Verify the existing PSI0 module is defective by using the procedure described in the Control Modules sec- tion on page 64.

2.Refer to Start-Up Checklist for Flotronic II Chiller Sys- tems (completed at time of original start-up) found in job folder. This information is needed later in this

procedure. If checklist does not exist, fill out the ri H

and Fi F\ configuration code sections on a new check- list. Tailor the various options and configurations as needed for this particular installation.

3 . Check that all power to unit is off. Carefully discon- nect all wires from defective module by unplugging the 6 connectors. It is not necessary to remove any of the individual wires from the connectors. Remove the green ground wire.

4 . Remove defective PSI0 by removing its mounting screws with a Phillips screwdriver, and removing the module from the control box, Save the screws for later use.

5 . Use a small screwdriver to set address switches Sl and S2 on the new PSI0 module to exactly match the set- tings on the defective module.

6 . Package the defective module in the carton of the new module for return to Carrier.

7 . Mount the new module in the unit control box using a Phillips screwdriver and the screws saved in Step 4 above.

73