Bosch BRB-36HWD1N1-M18 User manual

Bosch Inverter Ducted Packaged Heat Pump
18.5 SEER Series (3 Ton Capacity)
R410A
Installation & Operation Manual
BTC 761701311 C | 04.2020 US

2 |Bosch Inverter Ducted Packaged Heat Pump 3 Ton Installation & Operation Manual
04.2020 | BTC 761701311 C
Data subject to change

Installation & Operation Manual Bosch Inverter Ducted Packaged Heat Pump 3 Ton | 3
BTC 761701311 C | 04.2020 Data subject to change
Table of Contents
1 Key to Symbols and Safety Instructions 4
1.1 Key to Symbols 4
1.2 Safety 4
2 Component Location 6
3 Dimensions 7
3.1 Unit Dimensions 7
3.2 Dimensions - Back and Bottom 8
3.3 Dimensions - Left and Top 9
4 Installation 10
4.1 Pre-Installation 10
4.2 Rigging and Lifting 10
4.3 Location Restrictions 10
4.4 Rooftop Installation - Curb Mounting 12
5 Airflow Performance 13
6 Indoor Fan Motor Function 14
7 Ductwork 15
8 Condensate Drain Connection 16
8.1 Install Drain Pipe 16
9 Air Filter (Not Factory-Installed) 16
10 Electrical Wiring 17
10.1 Power Wiring 17
10.2 Grounding 17
10.3 Control Wiring 17
11 Start Up 19
11.1 System Start Up 19
12 System Charge Adjustment 20
12.1 Charging: Weigh-In Method 20
12.2 Subcooling Charging and Refrigerant Adjustment In Cooling
(Above 55°F Outdoor Temp.) 20
13 System Operation and Troubleshooting 22
13.1 Control Logic Description 22
13.2 Sensors (Thermistors/Pressure Transducer) 22
13.3 Defrost Description 23
13.4 Compressor Crankcase Heater Description 23
13.5 Reversing Valve Operation 23
13.6 Protection Functions 24
13.7 Fault Code Table 25
13.8 Parameter Point Check Table 26
13.9 Control Board Overview 27
13.10 Error Code Troubleshooting (ODU) 29
13.11 Error Code Troubleshooting (IDU) 35
13.12 Temperature and Resistance Relationship Tables (for Sensors) 36
13.13 Temperature and Resistance Relationship Tables (for T5) 37
13.14 Wiring Diagram 38
14 Maintenance 39
14.1 Cleaning Precautions 39
14.2 Regular Maintenance 39

4 |Bosch Inverter Ducted Packaged Heat Pump 3 Ton Installation & Operation Manual
04.2020 | BTC 761701311 C
Data subject to change
1 Key to Symbols and Safety Instructions
1.1 Key to Symbols
Warnings
Warnings in this document are identified 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 defined 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.
1.2 Safety
Please read before proceeding
This document contains a wiring diagram and service
information. This is customer property and is to remain with this
unit. Please return to service information pack upon completion
of work.
WARNING:HIGHVOLTAGE
Failure to follow this warning could result in property
damage, severe personal injury, or death.
WAIT THREE (3) MINUTES after disconnecting power
prior to touching electrical components as they may
hold a dangerous charge of 380 VDC,then verify DC
Voltage is less than 42VDC at inverter TEST POINTS
P-N.
NOTICE:
This document is customer property and is to remain
with this unit. Please return to service information
pack upon completion of work.
These instructions do not cover all variations in
systems or provide for every possible contingency to
be met in connection with the installation.
Should further information be desired or should
particular problems arise which are not covered
sufficiently for the purchaser’s purposes, the matter
should be referred to your installing dealer or local
distributor.
WARNING:
This information is intended for use by individuals
possessing adequate backgrounds of electrical
and mechanical experience. Any attempt to repair
a central air conditioning product may result in
personal injury and/or property damage.
WARNING:ELECTRICALSHOCK
Failure to follow this warning could result in property
damage, severe personal injury, or death.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized.

Installation & Operation Manual Bosch Inverter Ducted Packaged Heat Pump 3 Ton | 5
BTC 761701311 C | 04.2020 Data subject to change
WARNING:PERSONALINJURY/ENVIRONMENTAL HAZARD
Any attempt to repair a central air conditioning
product may result in property damage, severe
personal injury, or death.
These units use R-410A refrigerant which operates
at 50 to 70% higher pressures than R-22. Use only
R-410A approved service equipment. Refrigerant
cylinders are painted a “Rose” color to indicate the
type of refrigerant and may contain a “dip” tube
to allow for charging of liquid refrigerant into the
system. All R-410A systems with variable speed
compressors use a POE oil (VG74 or equivalent )
that readily absorbs moisture from the atmosphere.
To limit this ‘hygroscopic“ action, the system should
remain sealed whenever possible. If a system has
been open to the atmosphere for more than 4 hours,
the compressor oil must be replaced. Never break a
vacuum with air and always change the driers when
opening the system for component replacement.
CAUTION:HOTSURFACE
Do not touch top of compressor. May cause minor to
severe burning. Failure to follow this Caution could
result in property damage or personal injury.
CAUTION:HIGHPRESSURE
Failure to follow proper procedures can result in
personal illness or injury or severe equipment
damage. System contains oil and refrigerant under
high pressure. Recover refrigerant to relieve pressure
before opening system.
WARNING:GROUNDINGREQUIRED
Failure to inspect or use proper service tools may
result in equipment damage or personal injury.
Reconnect all grounding devices. All parts of this
product that are capable of conducting electrical
current are grounded. If grounding wires, screws,
straps, clips, nuts, or washers used to complete a
path to ground are removed for service, they must
be returned to their original position and properly
fastened.
CAUTION:BURNHAZARD
Failure to follow this warning will result in abrupt
release of system charge and may result in personal
injury and/or property damage. Extreme caution
should be exercised when applying gauges to service
ports.
WARNING:ELECTRICALSHOCK
Failure to follow this warning could result in property
damage, severe personal injury, or death.
Grounding is essential before connecting electrical
supply.
WARNING:
This product can expose you to chemicals including
Lead and Lead components, which are known to the
State of California to cause cancer and birth defects
or other reproductive harm. For more information
go to www.P65Warnings.ca.gov.
NOTICE:
A manufactured (mobile) home installation must
conform with the Manufactured Home Construction
and Safety Standard, Title 24 CFR, Part 3280, or
when this Standard is not applicable, the Standard
for Manufactured Home Installations (Manufactured
Home Sites, Communities and Set-Ups), ANSI/NCS
A225.1, and/or MH Series Mobile Homes, CAN/CSA
Z240.