BOSCH BOVA-36HDN1-M18M 36k BTU Inverter Condensing Unit Instruction Manual

: June 3, 2024
: Bosch

Table of Contents

BOSCH BOVA-36HDN1-M18M 36k BTU Inverter Condensing Unit Instruction
1 Key to Symbols and Safety Instructions
Important information
2 Outdoor Unit Model Numbers
3 Components
4 Replacement Instructions
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References
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BOSCH BOVA-36HDN1-M18M 36k BTU Inverter Condensing Unit Instruction

Manual

1 Key to Symbols and Safety Instructions

1.1 Key to Symbols
Warnings

Warnings in this document are identifi ed by a warning triangle printed against a grey background.
Keywords at the start of a warning indicate the type and seriousness of the ensuing risk if measures to prevent the risk are not taken.

The following keywords are defi ned and can be used in this document:

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could result in minor to moderate injury.
NOTICE is used to address practices not related to personal injury.

Important information

This symbol indicates important information where there is no risk to people or property.

2 Outdoor Unit Model Numbers

Bosch Part Number	Bosch Model Number	Description
7739832068	BOVA-36HDN1-M18M	36kBTU, Inverter Condensing Unit

Table 1 ODU Model & Part Numbers

3 Components

The following components are included in the kit:

Figure 1 Components

Updated wiring diagram included in kit. Replace the old wiring diagram on the back of the access panel.

Item Description	Qty
1	3T Control Board + E-box
2	Replacement Manual
3	3T Bottom Access Panel
4	Screws
5	Zip Ties
6	Wiring Diagram

Table 2 3T E-Box Kit Components

4 Replacement Instructions

Turn off power to the unit and wait at least 3 minutes

Remove the access panel to the control board (Figure 2). Keep Screws for re-use.
Turn off power to the unit and wait at least
Cut the 6 zip ties to unbundle the control board wires
Cut the 2 zip ties around gaskets at the bottom of the E-box
Remove all of the component wires from the Control Board. Take a picture before wire removal for dip switch and wiring reference.
Unscrew 16 screws to remove the top cover of the unit. When removing the top cover, be careful not to damage the heat exchanger ﬁns. Lean top panel against wall. Refer to Figure 4.
Carefully pull the wires from the bottom left and right hole through the back of the E-Box. See Figure 5.
Unscrew the 7 screws to remove E-box. Slide E-box up to Keep all screws for reuse. Refer to Figure 6.
Unscrew 2 screws (red) on the panel and 2 screws (blue) mounting the “true suction” service port. Remove Bottom Access Panel. Keep screws to re-install later. See Figure 7.
Cut 3 zip ties bundling the reactor box white harness
Unscrew 4 screws to remove reactor box and white wiring harness. This is not needed for the new control board. Refer to Figure 8.
Unit should look like should look like Figure 9.
Slide in the new E-box in from the top and secure with screws saved in Step 8. Note: The sides of the E-box should line up and slide into the guide rails on the unit. Refer to Figure 10.
Route the compressor wires and compressor ground to the top of the E-box and secure using wire clip. Refer to Figure 11.
All other component wires should be fed through the right gasket hole. Feed the wires through the hole one by one. Route the CCH wire (orange wire) through the separate slot on the E-box. Refer to fi gure 12.
Mount new Bottom Access Panel on with 4 screws and secure the true suction service port. Careful when sliding the true suction service port into the slot on the panel.
Make sure to reinstall T4 temperature sensor in Bottom Access Panel, refer to Figure 13. Lock sensor in strainer and push up through hole in panel.
Put top panel back on. Make sure the wires from the top panel, OD fan wire,
Motor capacitor and capacitor ground (for 3T units), are fed through the slot at the top left of the E-box.
Secure top panel with screws from step 6
Connect all wires according to the wiring diagram. See Figure 15.
Feed thermostat wires through the Bottom Access Panel to the CN9 wire harness on the control board. Splice wires and use fi eld supplied wire nuts to make connection. See Figure 17.
Make sure all wires are secured and not interfering with control board. Feed zip ties through holes in the E-box to secure wiring. Refer to Figure 18.
Feed L1, L2 and GND through the Bottom Access Panel.
Connect L1 and L2 to high voltage terminal block. Refer to Figure 19.