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
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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.

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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.

6 |Bosch Inverter Ducted Packaged Heat Pump 3 Ton Installation & Operation Manual
04.2020 | BTC 761701311 C
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2 Component Location
Figure 1
Outdoor Fan
RV
T3
T3L
T2
PT
T4
Indoor Fan
HPS
EEV
T1
Service
Valves
T5
Th
Comp
Fusible
Plug
Component Descriptions Component Descriptions
HPS High pressure switch T3L Condensor outlet temp. sensor
PT Pressure transducer Tf Radiator temp. sensor
T1 Return air temp. sensor Th Comp. return temp. sensor
T2 Indoor coil temp. sensor EEV Electronic expansion valve
T3 Condenser temp. sensor RV Reversing valve
T4 Ambient temp. sensor COMP Compressor
T5 Comp. discharge temp. sensor FP Fusible Plug
Table 1 Component Descriptions

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3 Dimensions
3.1 Unit Dimensions
Figure 2
Front
Knock out hole
1-3/4" Dia
High voltage
conn. 1-1/8" Dia
Low voltage
conn. 7/8" Dia
Condensate drain
connection 3/4" NPT
(Trap required)
Heat Pump Model L W H A B
BRB-36HWD1N1-M18 50-11/16" 35-1/16" 46-13/16" 44-1/16" 11-3/4"
Table 2 Unit Dimensions
Heat Pump Model Net Weight Gross Weight
BRB-36HWD1N1-M18 412 lbs (187 kg) 432 lbs (196 kg)
Table 3 Unit Weights

8 |Bosch Inverter Ducted Packaged Heat Pump 3 Ton Installation & Operation Manual
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3.2 Dimensions - Back and Bottom
Figure 3
Bottom view
Back view
OPTIONAL
SUPPLY AIR
OPENING
OPTIONAL
RETURN AIR
OPENING
SUPPLY
DUCT
OPENING
RETURN
DUCT
OPENING
21-9/16"
4-5/16"
2-9/16"
7-7/8"
21-9/16"4-3/16"
Heat Pump Model C D E F G H
BRB-36HWD1N1-M18 47-13/16" 32-1/4" 9-15/16" 15-7/8" 15-3/4" 9-3/4"
Table 4 Dimensions - Back and Bottom

Installation & Operation Manual Bosch Inverter Ducted Packaged Heat Pump 3 Ton | 9
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3.3 Dimensions - Left and Top
Figure 4
Top view
11-3/4"
5-1/16"
Left side view
6-5/8" 6-5/8"

10 |Bosch Inverter Ducted Packaged Heat Pump 3 Ton Installation & Operation Manual
04.2020 | BTC 761701311 C
Data subject to change
4 Installation
4.1 Pre-Installation
Before installation, carefully check the following:
1. Unit should be installed in accordance with national and local
safety codes, including but not limited to ANSI/NFPS No. 70, local
plumbing and wastewater codes and any other applicable codes.
2. For rooftop installation, be sure the structure has enough strength
to support the weight of unit. Unit must be installed on a field
supplied roof curb or rack and leveled.
3. For ground level installation, a field supplied level slab must be
used.
4. Condenser airflow should not be restricted.
5. On applications when a roof curb is used, the unit must be
positioned on the curb so the front of the unit is tight against
the curb. If the unit is to be mounted on a curb in a downflow
application, refer to Figure 14, and convert panels prior to rigging
and lifting. The panel removal process may require the unit to be on
the ground.
4.2 Rigging and Lifting
Figure 5
Exercise care when moving the unit. Do not remove any packaging until
the unit is near the place of installation. Rig the unit by attaching chain or
cable slings to the lifting holes provided in the base rails. Spreader bars,
whose length exceeds the largest dimension across the unit, MUST be
used across the top of the unit.
When rigging/lifting the unit, the minimum height between the top of the
rigging cables' connection point and top of unit should be 36 inches. Refer
to Figure 5.
CAUTION:
Before lifting, make sure the unit weight is
distributed equally on the rigging cables so it will lift
evenly.
CAUTION:
All panels must be secured in place when the unit is
lifted. The condenser coils should be protected from
rigging cable damage with plywood or other suitable
material.
4.3 Location Restrictions
Ensure the top discharge area is unrestricted for at least 60 inches above
the unit.
Do not locate outdoor unit near bedrooms since normal operational noise
levels may be disturbing to building occupants.
Position unit to allow adequate space for unobstructed airflow, wiring, and
serviceability.
Do not restrict outdoor airflow. An air restriction at either the outdoor air
inlet or the fan discharge may be detrimental to compressor life.
Do not place the unit where water, ice, or snow from an overhang or roof
will damage or flood the unit. Do not install the unit on carpeting or other
combustible materials. Slab-mounted units should be at least 2 inches
(51 mm) above the highest expected water and runoff levels. Do not use
unit if it has been under water.
Maintain a distance of 24 inches between units. Position unit so water,
snow, or ice from roof or overhang cannot fall directly on unit.
See Figure 7 and Figure 8 for minimum clearance requirements.
Cold climate considerations (heat pump only)
NOTICE:
Precautions must be taken for units being installed
in areas where snow accumulation and prolonged
below-freezing temperatures occur.