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A
737-300/400/500MAINTENANCE MANUAL
 C. Procedure
 S 864-007
 (1)  
Make sure the new valve's position indicator shows that the valve is closed.

 S 434-019

 (2)
Put the valve between the duct ends and install the V-band clamps.

 (a)  Do not tighten the clamps.
 NOTE: For the left 35°F control valve installation, install
____ the valve with the motor actuator side of the valve turned up 20 |10 degrees. For the right side, install the valve with the motor actuator side of valve turned down 20 |20 degrees.
 S 434-009
 (3)  
Tighten the V-band clamps.

 S 434-010

 (4)  
Connect the bonding jumper to the valve.

 S 434-011

 (5)  
Connect the electrical connector to the valve.

 S 864-012

 (6)  
Supply electrical power (Ref 24-22-00/201).

 S 864-013

 (7)  
Make sure that the applicable (the LEFT or the RIGHT) 35°F TEMP CONTROL circuit breaker on the P6 panel is closed.

 (8)  
Make sure that the 35°F control valve is closed.

 S 714-014
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
737-300/400/500MAINTENANCE MANUAL
 S 864-015
 (9)  
Open the applicable TEMP CONTROL circuit breaker.

 S 434-021

 (10)
 Remove the electrical connector from the 35°F control sensor.

 S 714-020

 (11)
 Close the applicable TEMP CONTROL circuit breaker and make sure that the 35°F control valve opens.

 S 864-016

 (12)
 Open the applicable TEMP CONTROL circuit breaker.

 D. Put the Airplane Back to Its Usual Condition
 S 434-023
 (1)  
Install the 35°F control sensor electrical connector.

 S 864-019

 (2)  
Close the applicable TEMP CONTROL circuit breaker.

 S 714-022

 (3)  
Make sure that the 35°F control valve closes.

 S 864-017

 (4)  
Remove the electrical power if it is not necessary
 (Ref 24-22-00/201).

 (5)
Close the applicable equipment bay door for the air conditioning.

 S 414-018
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
737-300/400/500MAINTENANCE MANUAL
 35°F CONTROLLER - REMOVAL/INSTALLATION
______________________________________
 1.  General_______
 A.  This procedure has these tasks:
 (1)  
35 Degree Controller Removal

 (2)  
35 Degree Controller Installation

 B.  The 35 Degree Controller is in the ECS equipment bay just outboard of the water separator on the outboard ECS bay bulkhead.
 TASK 21-51-52-004-019
 2.  35°F Controller - Removal (Fig. 401)_________________________
 A.  Access
 (1)  Location Zones
 212 Left Air Conditioning Equipment Bay
 214 Right Air Conditioning Equipment Bay

 B.  Prepare for the Removal
 S 864-001
 (1) Do these steps to remove the controller for the left pack:
 (a)  
Open this circuit breaker on the P6-4 panel and install a DO-NOT-CLOSE tag: 1) 6A2 TEMP CONTROL 35 DEG F CONTROL L

 (b)  
Open the left ECS bay access door.

 S 864-002
 (2) Do these steps to remove the controller for the right pack:
 (a)  
Open this circuit breaker on the P6-4 panel and install a DO-NOT-CLOSE tag: 1) 6A1 TEMP CONTROL 35 DEG F CONTROL R

 (b)  
Open the right ECS bay access door.
　
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