Attached are both documents for the 18 Seer and 20 Seer Bosch Inverters. These are to help assist in setup and startup of new units.

 

SW4-3 Function:

While in the off position (enabled) allows for coil/

condenser target temperature to drift +/- 4°F based

on previous hour of operation in an attempt to

optimize run time. Reason to Disable: In zoning

applications but only as needed as a result of

customer expectations and/or performance.

 

SW4-4 Function:

Reduces target coil temperature in cooling to 37°F

and increases target coil temperature in heating to

114°F. Recommended to be used only as needed as a

result of customer expectations and/or performance.

 

 

SW5-1 Function:

Functions allows for the equipment to enter defrost

sooner than normal. Used in northern cool climates

where high humidity is common.

 

SW5-2 Function:

Function allows for defrost cycle to be extended from

8 minutes to 9 minutes. Also used in cooler climates

where high humidity is common.

Manual/Force Defrost

To initiate defrost cycle:

1. System must have a call for heat and have been

operating for a minimum of 8 minutes

2. Press “FORCE” button on inverter board for 8

seconds to begin forced defrost

3. Wait approximately 40 seconds for defrost to initiate

4. Once defrost initiates the display will indicate “dF”

5. Defrost test will terminate automatically after which

the display will indicate running speed

6. If a second defrost test is required, repeat

step 2-5 after 5 minutes

 

Wiring Diagrams:

 

 

 

 

Here are the Startup Guides.