Bosch BOVA-36HN1-M18M Installation Instructions

Bosch BOVA Split System Heat Pump
Condensing Units Up to 18 SEER
2-3-4-5 Ton Capacity
R410A
Installation Instructions
2 | Bosch IDS BOVA
Data subject to change
Installation Instructions
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 3
Table of Contents
1
Key to symbols and safety instructions
4
2
Unit location considerations
6
3
Unit preparation
8
4
Setting the unit
8
5
Refrigerant line considerations
9
6
Refrigerant line routing
10
7
Refrigerant line brazing
11
8
Refrigerant line leak check
13
9
Evacuation
13
10
Service valves
14
11
Electrical - low voltage
15
12
Electrical - high voltage
16
13
Start up
17
14
System charge adjustment
18
15
System operation and troubleshooting
21
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
4 | Bosch IDS BOVA
1
1.1
Key to symbols and safety instructions
Key to symbols
Warnings
Installation Instructions
1.2
Safety
Please read before proceeding
CAUTION:
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.

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.
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
The manufacturer recommends installing only approved
matched indoor and outdoor systems. All of the manufacturer’s split
systems are A.H.R.I. rated only with TXV indoor systems. Some of the
benefits of installing approved matched indoor and outdoor split systems
are maximum efficiency, optimum performance and the best overall
system reliability.
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.
This symbol indicates important information where
there is no risk to people or property.
CAUTION:

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: HAZARDOUS VOLTAGE
Data subject to change

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.
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 5
WARNING: REFRIGERANT OIL
WARNING: SERVICE VALVES


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 cylin-ders 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 PVE oil 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: HOT SURFACE

May cause minor to severe burning. Failure to follow this
Caution could result in property damage or personal injury.
Do not touch top of compressor.
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 opening the Liquid Line Service valve. Turn valve stem
counterclockwise only until the stem contacts the rolled edge.
No torque is required.
WARNING: BRAZING REQUIRED

Failure to inspect lines or use proper service tools may result
in equipment damage or personal injury. if using existing
refrigerant lines make certain that all joints are brazed, not
soldered.
WARNING: HIGH CURRENT LEAKAGE

Failure to follow this warning could result in property damage,
severe personal injury, or death.
Grounding is essential before connecting electrical supply.
CAUTION: CONTAINS REFRIGERANT

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.
CAUTION: GROUNDING REQUIRED

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: INDOOR UNIT REQUIRED

The indoor units must be matched with TXV. The model of TXV
can be changed according to the system capacity.
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
6 | Bosch IDS BOVA
2
Installation Instructions
Unit location considerations
2.1
2.2
Unit dimensions
Unit Dimensions
Models
H x W x L (Inches)
BOVA-36
24-15/16 x 29-1/8 x 29-1/8
BOVA-60
33-3/16 x 29-1/8 x 29-1/8
Table 1
Refrigerant piping limits

Maximum line equivalent length = 100 feet.

Maximum vertical equivalent length = 50 feet.

Use only the line diameters indicated in Table 5.1.

If the suction line sets are greater than 60 feet do not use a larger suction
line than recommended.
The unit’s weight values is on the carton box.
When mounting the outdoor unit on a roof, be sure the roof will support the unit’s
weight. Properly selected isolation is recommended to prevent sound or vibration
transmission to the building structure.
W
Standard Line
Set 100’ Max
Line Length
H
50’ Max
Line Lift
L
Figure 1
50’ Max
Line Lift
Figure 2
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
2.3
Bosch IDS BOVA | 7
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 sounds may be
objectionable.
Avoid Install
Near Bedrooms
Position unit to allow adequate space for unobstructed airflow, wiring, refrigerant
lines, and serviceability.
Allow a minimum of 12 in. clearance on one side of access panel to a wall and a
minimum of 24 in. on the adjacent side of access panel.
Min. 60” Unrestricted
Min. 20” to
Shrubbery
Min. 36”
Unrestricted
Maintain a distance of 24 in. between units.
Position unit so water, snow, or ice from roof or overhang cannot fall directly on unit.
Access Panel
See Fig. 3 and Fig. 4.
Cold climate considerations (heat pump only)
Figure 3
Precautions must be taken for units being installed in areas where
snow accumulation and prolonged below-freezing temperatures occur.

Units should be elevated 3-12 inches above the pad or rooftop, depending
on local weather. This addi-tional height will allow drainage of snow and ice
melted durIng defrost cycle prior to its refreezlng. Ensure that drain holes
in unit base pan are not obstructed, preventing drainage of defrost water
(Fig. 5).

If possible, avoid locations that are likely to accu-mulate snow drifts. if not
possible, a snow drift barrier should be installed around the unit to prevent
a build-up of snow on the sides of the unit.
Min. 20” to
Shrubbery
Min. 36” to
Shrubber
Access Panel
Figure 4
Min 12"
Snow
barrier
Snow legs
3- 12" Elevation
pad
Figure 5
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
8 | Bosch IDS BOVA
3
Installation Instructions
Unit preparation
3.1
Prepare the unit for installation

STEP 1 - Check for damage and report promptly to the carrier any damage
found to the unit (Fig. 6).

The charge port can be used to check to be sure the refrigerant charge has
been retained during shipment.
Figure 7
The dimension
see Unit Dimensions.
Figure 6
4
4.1
Setting the unit
Pad installation
When installing the unit on a support pad, such as a concrete slab, consider the
following:

The pad must be at least 1-2” larger than the unit on all sides.

The pad must be separate from any structure.

The pad must be level.

The pad must be high enough above grade to allow for drainage.

The pad location must comply with National, State, and Local codes.
These instructions are intended to provide a method to tie-down system to
cement slab as a securing procedure for high wind areas. Check Local
Codes for tie-down methods and protocols.
See Detail A
#7 X 3/8” Self Tapping Screws
(Don’t Exceed 3/8” long)
Detail A
Brackets:
2" width, 1/16" thickness,
height as required.
Available from distributor
or in market place.
1/4” Χ 1-1/2” Hex Washer Head Concrete Screws
(3/16” Pilot Hole Needed. Pilot Hole Should Be1/4” Deeper
Than The Fastener Embedment)
Figure 8
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
5
Bosch IDS BOVA | 9
Refrigerant line considerations
5.1
5.4
Reuse existing refrigerant lines
Refrigerant line and service valve connection sizes
Suction line
Liquid line
Suction line
connection
Liquid line
connection
BOVA-36
3/4
3/8
3/4
3/8
BOVA-60
7/8
3/8
7/8
3/8
Models

If using existing refrigerant lines make certain that all joints
are brazed, not soldered.
For retrofit applications, where the existing refrigerant lines will be used, the
following precautions should be taken:
Table 2
5.2
CAUTION:
Required refrigerant line length

Ensure that the refrigerant lines are the correct size. Refer to Section 5.1
listed and Table 2.

Ensure that the refrigerant lines are free of leaks, acid, and oil.
Determine required line length (Fig. 9).
The manufacturer recommends installing only approved matched indoor
and outdoor systems. All of the manufacturer’s split systems are A.H.R.I.
rated only with TXV indoor systems. Some of the benefits of installing
approved matched indoor and outdoor split systems are maximum
efficiency, optimum per-formance and the best overall system reliability.
Line Length
Figure 9
5.3
Refrigerant line insulation
The Suction Line must always be insulated. DO NOT allow the Liquid Line
and Suction Line to come in direct (metal to metal) contact.
Liquid Line
Suction Line
Insulation
Figure 11
Figure 10
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
1 0 | Bosch IDS BOVA
6
6.1
Installation Instructions
Refrigerant line routing
Comply with National, State, and Local Codes when isolating line sets from
joists, rafters, walls, or other structural elements.
Precautions
Take precautions to prevent noise within the building structure due to
vibration transmission from the refrigerant lines. For Example:

When the refrigerant lines have to be fastened to floor joists or
other framing in a structure, use isolation type hangers.

Isolation hangers should also be used when refrigerant lines are
run in stud spaces or enclosed ceilings.

Where the refrigerant lines run through a wall or sill, they should
be insulated and isolated.

Isolate the lines from all ductwork.

Minimize the number of 90º turns.
8 Feet Maximum
Jo ist/Raft er
Isolator
Side View
8 Feet Maximum
Line Set
Secure Suc tion li ne from joists us ing isolators every 8 ft . Secure
Liquid Line directly to Suc tion li ne using tape, wire, or other
approp riate method every 8 ft.
Isolation From Joist/Rafter
Figure 12
8 Feet Maximum
Wall
Isolator
Line Set
Side View
8 Feet Maximum
Secure Suc tion Line using isolators every 8 ft . Secure Liqu id Line
directly to Suc tion Line using tape, wire, or other approp riate
method every 8 ft.
Isolation In Wall Spaces
Figure 13
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 11
Wall
Sealant
Duc twork
Insulati on
Suc tion Line
Isolator
Line Set
Isolation Through Wall
DO NOT hang line sets from duc twork
Figure 14
7
7.1
1.
Refrigerant line brazing
Braze the refrigerant lines
Remove caps or plugs. Use a deburing tool to debur the pipe ends. Clean both
internal and external surfaces of the tubing using an emery cloth.
Figure 15
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
1 2 | Bosch IDS BOVA
2.
Installation Instructions
Remove the pressure tap cap from both service valves.
Field supplied
and installed
3-4" from valve
Figure 18
Figure 16
3.
Purge the refrigerant lines and indoor coil with dry nitrogen.
5.
Replace the pressure tap caps after the service valves have cooled.
This pipe
must have
a thimble
Figure 19
Figure 17
4.
Wrap a wet rag around the valve body to avoid heat damage and continue the
dry nitrogen purge (Fig. 18).
Braze the refrigerant lines to the service valves.
Check liquid line filter drier’s directional flow arrow to confirm correct direction
of refrigeration flow (away from outdoor unit and toward evaporator coil) as
illustrated. Braze the filter drier to the Liquid Line.
Continue the dry nitrogen purge. Do not remove the wet rag until all brazing is
completed.
Remove the wet rag before stopping the dry nitrogen purge.
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
8
8.1
1.
Refrigerant line leak check
Check for leaks
Bosch IDS BOVA | 13
9
9.1
Evacuation
Evacuate the refrigerant lines and indoor coil
Pressurize the refrigerant lines and evaporator coil to 150 PSIG using dry
nitrogen.
150 PSIG
Do not open the service valves until the refrigerant lines and indoor coil
leak check and evacuation are complete.
1.
Evacuate until the micron gauge reads no higher than 350 microns, then close
the valve to the vacuum pump.
0350
Microns
ON
OFF
Figure 20
Figure 22
2.
Check for leaks by using a soapy solution or bubbles at each brazed location.
2.
Observe the micron gauge. Evacuation is complete if the micron gauge does not
rise above 500 microns in one (1) minute.
Once evacuation is complete blank off the vacuum pump and micron gauge,
and close the valves on the manifold gauge set.
1 MIN.
Figure 23
Figure 21
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
1 4 | Bosch IDS BOVA
10
Installation Instructions
Service valves
10.1
Open the service valves
Cap
5/16” Hex Wrench
for Sucti on Service Valve
WARNING:

Extreme caution should be exercised when opening the
Liquid Line Service Valve. Turn counterclock wise until the
valve stem just touches the rolled edge. No torque is required.
Failure to follow this warning will result in abrupt release
of system charge and may result in personal injury and /or
property damage.
Unit S ide
of Service
Valve
3/16” Hex Wrench
for Liqu id Service Valve
Roll ed Edge to
Capti vate Stem
Hex Headed
Valve System
Leak check and evacuation must be com pleted before opening the service
valves.
Service Port
The Suction Service Valve must be opened first BEFORE opening the
Liquid Service Valve!
1.
Remove service valve cap (Fig 24).
2.
Fully insert hex wrench into the stem and back out counterclockwise until valve
stem just touches the rolled edge (approximately five (5) turns.)
3.
Replace the valve stem cap to prevent leaks. Tighten finger tight plus an
additional 1/6 turn.
4.
Repeat STEPS 1 - 3 for Liquid Service Valve.
Data subject to change
Figure 24
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
11
Bosch IDS BOVA | 15
Electrical - low voltage
11.1
Low Voltage Maximum Wire Length
Table 3 defines the maximum total length of low voltage wiring from the outdoor unit,
to the indoor unit, and to the thermostat.
24 Volts - Wire size
Max. wire length
18 AWG
150 Ft.
16 AWG
225 Ft.
14 AWG
300 Ft.
Table 3
11.2
Low voltage hook-up diagrams
Air Handler Hook-up Diagram
Access
Panel
Low Voltage connection
must be made inside the
outdoor unit case.
Figure 25
Notes:
1. Be sure power supply agrees with
equipment nameplate.
W2
B
C
R
Y
2.
Power wiring and grounding of
equipment must comply with local codes.
3.
Low voltage wiring to be No. 18 AWG
minimum conductor.
4.
“____” The electric auxiliary heat
connection.
BLACK
G
THERMOSTAT
G
R
C
w1
INDOOR UNIT
C
Y
B
D/W
OUTDOOR UNIT
Control Wiring for H/P Systems.
Figure 26
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
1 6 | Bosch IDS BOVA
12
Electrical - high voltage
12.1
High voltage power supply
Installation Instructions
12.2
High voltage disconnect switch
Install a separate disconnect switch at the outdoor unit.
Field provided flexible electrical conduit must be used for high voltage wiring.
WARNING: LIVE ELECTRICAL COMPONENTS!

During installation, testing, servicing, and trouble shooting of
this product, it may be necessary to work with live electrical
components. Failure to follow all electrical safety precautions
when exposed to live electrical components could result in
death or serious injury.
The high voltage power supply must agree with the equipment nameplate.
Power wiring must comply with national, state, and local codes.
Follow instructions on unit wiring diagram located on the inside of the control box
cover and in the Service Facts document included with the unit.
Figure 28
12.3
High voltage ground
Ground the outdoor unit per national, state, and local code requirements.
Figure 27
Figure 29
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
13
Bosch IDS BOVA | 17
Start up
13.1
5.
Set system thermostat to ON.
System start up
1.
Ensure Sections 7, 8, 9, 10, 11, 12, and 13 have been completed.
2.
Set System Thermostat to OFF.
TUE
Inside
EM HEAT
Set To
Following
Schedule
OFF
COOL
DONE
CANCEL
OFF
DONE
CANCEL
Figure 33
Figure 30
3.
Turn on disconnect to apply power to the indoor and outdoor units.
ON
OFF
Figure 31
4.
Wait one (1) hour before starting the unit if compressor crankcase heater is
used and the outdoor ambient temperature is below 70 ºF.
60 MIN.
Figure 32
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
1 8 | Bosch IDS BOVA
14
Installation Instructions
System charge adjustment
14.1
14.2 Subcooling charging and refrigerant adjustment in
cooling (above 55°F outdoor temp.)
Charging: weigh-in method
1.
Weigh-In method can be used for the Initial installation, or anytime a system charge
is being replaced. weigh-In Method can also be used when power is not available to
the equipment site or operating conditions (indoor/Outdoor temperatures) are not In
range to verify with the subcooling charging method.
A
B
C
Factory Charge
Charge multiplier for
interconnecting refrigerant
tube length
The data on nameplate
0.6 oz/ft
Model
All models
Check the outdoor ambient temperatures.
Subcooling (in cooling mode) is the only recommended method of charging
above 55ºF outdoor ambient temperatures.
For outdoor ambient temperatures below 55ºF , use weigh-in charge method.
Note:It is important to return in the spring or summer to accurately charge the
system in the cooling mode when outdoor ambient temperature is above 55ºF.
Outdoor
Temperature
Above 55ºF
Table 4
The factory charge in the outdoor unit is sufficient for 15 feet of standard
size interconnecting liquid line.
120ºF
55ºF
55ºF
New Installations — Calculating additional charge for lineset
greater than 15 ft.
1.
Total Line Length (ft)
2.
Standard Lineset (ft)
=
3.
(a) minus (b)
= _________(c)
4.
Refrigerant Multiplier
= 0.6 oz/ft (d)
5.
Refrigerant Adder (c*d)
= _________(e)*
Outdoor
Temperature
Below 55ºF
= _________(a)
15
(b)
Outdoor Temp1
Outdoor Temp2
Figure 34
For best results the indoor temperature should be kept between 70ºF to 80ºF.
*If lineset is less than 15 ft, (e) = 0
Sealed-System Repairs — Calculating total system charge.
1.
Total Line Length (ft)
= _________(a)
2.
Standard Lineset (ft)
=
15
80 ºF
(b)
3.
(a) minus (b)
= _________(c)
4.
Refrigerant Multiplier
= 0.6 oz/ft (d)
5.
Refrigerant Adder (c*d)
= _________(e)*
6.
Factory Charge (namplate) = _________(f)
7.
Total System Charge (e+f) = ________ _
70ºF
*If lineset is less than 15 ft, (e) = 0
Indoor Temp
The only mode approved for validating system charge is while in Cooling
"Charge Mode". Outdoor Temperature must be between 55°F and 120°F
with Indoor Temperature kept between 70°F and 80°F.
Figure 35
2.
Ensure Sections 7, 8, 9, 10, and 13 have been completed.
3.
Stabilize the system.
After starting the system in cooling mode, short press “FORCE”button, and
“ ” symbol appears in 10 minutes, operate the system for a minimum of
twenty (20) minutes.
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 19
After twenty (20) minutes stabilization period, maintain continuous
operation while adjusting refrigerant charge or TXV, after which operate
system for a minimum of five (5) minutes for system to stabilize, otherwise
repeat step 3.
8
40
101
97
93
89
86
82
78
75
42
105
101
97
93
89
86
82
78
44
110
105
101
97
93
89
86
82
46
114
110
105
101
97
93
89
86
48
118
114
110
105
101
97
93
89
50
123
118
114
110
105
101
97
93
52
128
123
118
114
110
105
101
97
54
133
128
123
118
114
110
105
101
56
138
133
128
123
118
114
110
105
Calculate superheat value on suction valves (According to Table 4 )
58
143
138
133
128
123
118
114
110

Measured Suction Line Temp. = ________ºF
60
148
143
138
133
128
123
118
114

Measured Suction Line Pressure = _______ PSIG
62
153
148
143
138
133
128
123
118

Calculate superheat value = ________ºF
64
159
153
148
143
138
133
128
123
66
164
159
153
148
143
138
133
128
68
170
164
159
153
148
143
138
133
70
176
170
164
159
153
148
143
138
72
182
176
170
164
159
153
148
143
11
12
13
20 MIN.
Figure 36
4.
Table 4
107!
Insulation
Figure 36
5.
Final Superheat (°F)
Suction
Temp
(°F)
Calculate subcooling value on liquid valves (According to Table 5 )
10
12
14
16
18
20
22
Suction Gage Pressure (PSI)
R-410A Refrigerant chart - Final Superheat
Final Supercooling(°F)
Suction
Temp
(°F)
6
55
173
176
179
182
185
188
191
195
60
188
191
195
198
201
204
208
211
65
204
208
211
215
218
221
225
229
70
221
225
229
232
236
239
243
247
75
239
243
247
251
255
259
262
266
80
259
262
266
270
275
279
283
287
7
8
9
10
Liquid Gage Pressure (PSI)

Measured Suction Line Temp. = ________ºF

Measured Suction Line Pressure = _______ PSIG
85
279
283
287
291
295
300
304
309

Calculate superheat value = ________ºF
90
300
304
309
313
318
322
327
331
95
322
327
331
336
341
346
351
355
100
346
351
355
360
365
370
376
381
105
370
376
381
386
391
397
402
407
110
397
402
407
413
418
424
430
435
115
424
430
435
441
447
453
459
465
120
453
459
465
471
477
483
489
496
125
483
489
469
502
508
515
521
528
Table 5
R-410A Refrigerant chart- Final Subcooling
Insulation
Model
Design subcooling
Figure 37
24/36
48/60
10°F ± 2°F
8°F ± 2°F
Table 6
If calculated subcooling value is lower than the design subcooling value
(Table 6), please add refrigerant. Repeat the steps above.
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
2 0 | Bosch IDS BOVA
6.
Installation Instructions
Adjust refrigerant level to attain proper gage pressure.
Add refrigerant if the design subcooling is lower than the chart value.
8.
Record System Information for reference (Table 7).
Record system pressures and temperatures after charging is complete.
Description
Value
Outdoor model number
Measured Outdoor Ambient
°F
Connect gages to refrigerant bottle and unit as illustrated (Fig 38).
Measured Indoor Ambient
°F

Purge all hoses.
Measured Liquid Line Temp
°F

Open bottle.
Measured Suction Line Temp
°F

Liquid Gage Pressure
PSIG
Stop adding refrigerant when subcooling. matches the charging chart (Table
5) Final Subcooling value.
Suction Gage Pressure
PSIG

Table 7
Recover refrigerant if the design subcooling is lower than the chart value.
Figure 38
7.
Stabilize the system.

Wait 5 minutes for the system condition to stabilize between adjustments.
When the subcooling match the chart, the system is properly charged.

Remove gages.

Replace service port caps to prevent leaks. Tighten finger tight plus an
additional 1/6 turn.
20 MIN.
Figure 39
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
15
Bosch IDS BOVA | 21
System operation and troubleshooting
15.1

TF = IPM Radiator Temperature) (Table 2)
—
Control logic description

Inverter High Temperature Protection
Pressure transducer (Table 3)

The variable speed system adopts the same 24VAC control as any
conventional Heat Pump.
—
Operating speed control
—
Electronic Expansion Valve (EEV) control (ODU)

The compressor’s speed is controlled based on coil pressures monitored
by pressure transducer. To insure stable and adequate capacity, the
compressor speed will modulate relative to evaporator pressure during
cooling operation and relative to condensing pressure during heating
operation. The target pressure can auto-matically adjust based on
compressor operation so optimal capacity can be achieved. Target pressure
can manually be adjusted (SW4) to achieve improved dehumidification and
capacity demands.
—
High pressure protection (heating mode)
—
Low pressure protection (cooling mode)
15.3

The Demand Defrost Control (DDC) monitors the ODU coil temperature
using thermistor (T3). A second thermistor (T4) monitors outdoor ambient
temperature. Based on these parameters, as well as accumulative run time
and high pressure, the DDC calculates proper initiation of defrost.

The following three conditions are required to enter defrost:
6:
1.
Outdoor coil temperature T3 < 34°F and a corresponding minimum
outdoor ambient temperature is met.
2.
After “Minimum Run Time” (MRT) is achieved. MRT is based on outdoor
ambient temperature (T4), for example:
ON
OFF
1
2
3
4
3.
Figure 40
Switch
Description
SW4-1
Not used
SW4-2
Not used
SW4-3
SW4-4
ON
Adaptive capacity output disable
OFF
Adaptive capacity output enable
ON
Accelerated cooling/heating
OFF
Normally cooling/heating
Defrost description
—
MRT is 4 hours when: T4 < 23°F
—
MRT is 2 hours when: 23°F ≤ T4 < 42°F
After the high pressure saturation temperature drops below 82°F for 20
minutes.

Defrost will terminate once outdoor coil temperature (T3) reaches 64°F for
a period of 1 minute or defrost time has exceeded 8 minutes.

Defrost Termination Settings (SW5) offers different defrost termination
options for enhanced defrost for different geographical &/or outdoor
conditions.
Table 8
SW5
ON
15.2



Sensors (thermistors/pressure transducer)
OFF
1
2
t3 = Outdoor Coil Temperature (Table 1)
—
High/Low temperature protection
—
Outdoor fan control (cooling mode)
—
Defrost control (heating mode)
—
Ambient Temperature forecast
T4 = Ambient Temperature (Table 1)
—
Operating condition permission
—
Defrosting condition permission
—
Outdoor fan control (heating mode)
Figure 41
Defrosting choice
ON
OFF
Remarks
SW5-1
SW5-2
Operating time is
reduced by 10%
Defrosting extended
for 60 seconds
Normal
Normal
Enter defrost
Quit defrost
Remarks
Default
Table 8
T5 = Compressor Discharge Temperature (Table 2)
—
High/Low temperature protection
—
Electronic Expansion Valve (EEV) control (ODU)
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
2 2 | Bosch IDS BOVA

Manual Defrost:
Installation Instructions
15.6
Protection functions
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 6 seconds to begin forced
i.
If T3 > 143.6°F, compressor is de-energized
defrost.
ii.
If T3 < 129.2°F, compressor is energized

Outdoor coil temperature protection (T3)
3.
Wait approximately 40 seconds for defrost to initiate.
4.
Once defrost initiates, the display will indicate “dF”.
i.
If 50°F ≤ T4 < 140°F, unit can ope rate in cooling
5.
Defrost test will terminate automatically, after which the display will
indicate running speed.
ii.
If -4°F ≤ T4 < 86°F, unit can operate in heating
If a second defrost test is required, repeat step 3 after 5 minutes.
iii.
If T4 < 6.8°F, heat pump will provide 24V control to indoor unit
energizing electric heat (if installed).
6.


15.4
Compressor crankcase heater description
Refrigerant migration during the OFF cycle can result in noisy start-ups, therefore
a crankcase heater (CCH) is used to minimize refrigerant migration thereby
minimizing start-up noise and/or bearing “wash out”. All CCHs must be installed
on the lower half of the compressor shell. Its purpose is to warm the compressor
on the OFF cycle, driving refrigerantfrom compressor. At initial start-up or after
extended shutdown periods, allow CCH to be energized for at least 12 hours prior to
compressor operation by applying line voltage to heat pump with thermostat OFF.

CCH operation energizes:
1.
First time line voltage is applied and compressor discharge temperature T5 <
104°F.


Ambient temperature protection (T4)
Discharge Temperature (DT) protection (T5)
i.
If DT > 239°F during cooling mode, the compressor will stop.
ii.
If DT < 194°F during cooling mode, the compressor will restart.
iii.
If DT > 221°F during heating mode, the compressor will stop.
iv.
If DT < 167°F during heating mode, the compressor will restart.
High pressure protection (HPS) (mechanical open/close pressure switch)
i.
HPS opens at P > 580 PSIG, the compressor and outdoor fan stop.
ii.
HPS closes at P < 435 PSIG, the compressor and outdoor fan restart.
Low pressure protection (LP)
i.
If Low Pressure < 43.5 PSI for 5 minutes during cooling mode, the
compressor and outdoor fan will stop.System will attempt to run again
after 6 minutes.
2.
In process of defrosting.
3.
Compressor stops running for 4 hours and outdoor ambient temperature T4 <
50°F or T5 < 104°F.

CCH operation de-energizes:
i.
If TF > 176°F, the compressor and outdoor fan will stop.
1.
Compressor discharge temperature T5 ≥ 113°F.
ii.
If TF< 145°F, the compressor and outdoor fan will restart.
15.5


Module (inverter) protection (TF)
Reversing valve operation
Reversing valve energizes during heat mode and de-energizes in cool mode.
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
15.7
Bosch IDS BOVA | 23
Fault code table
Code
Fault Description
E4
Temperature sensor fault(T3, T4, T5, TF)
E5
High/low voltage protection
E6
DC fan motor fault
E7
Compressor discharge sensor(T5) is seated fault
E9
EEPROM fault
Eb
System lockup, 2 times (E6) protection in 10 minutes
H0
Communication fault in main control chip
H4
System lockup, 3 times (P6) protection in 60 minutes
H5
System lockup, 5 times (P2) protection in 100 minutes
H8
Pressure transducer(PT) fault
Hb
High pressure(PT) protection in Heating
P0
High module radiator temperature (TF)protection
P1
High pressure switch(HPS)protection
P2
Low pressure(PT) Protection in cooling
P3
Compressor over current protection
P4
High compressor discharge temperature(T5) protection
P5
condensor coil temperature(T3) protection in cooling
P6
The IPM module protection
PH
Low discharge superheat protection
F1
High pressure switch(HPS) fault
C3
The condensor coil sensor(T3) is seated fault in cooling
L0-L9
AtL
The IPM module protection (the same as P6,only for analysis)
Ambient Temperature Limited
System Protection Status Codes
Indication under charge model
L
Running indication under T3 limited condition
D
Running indication under T5 limited condition
P
Running indication under compressor ratio limited condition
F
Running indication under Tf limited condition
C
Running indication under current limited condition
U
Running indication under low voltage limited condition
H
Running indication under high pressure(PT) limited condition in heating
A
Running indication under return oil model
dF
Running indication under defrost model
Table 9
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
2 4 | Bosch IDS BOVA
15.8
Parameter point check table

To display system parameters, press the “Check” button to index through
the series of parameters available. The first time you press on the “Check”
button, it will display the sequence, and after 1 second it will display the
value of the parameter. If you press the “Check” button again, it will display
the next sequence.

Normal Status, last two digits will display under following conditions
i.
ii.
Unit not operating(Standby Mode); “outdoor ambient temperature”.
Unit operating; displays “compressor operating frequency”.

After 20 seconds on same parameter, display will revert back to normal
status.

If a system protection is active, first digit will display “status code”.
No.
Installation Instructions
Point check content
Example
Remark
0
Outdoor unit capacity
H3
H3=Heat Pump 3 ton
1
Outdoor unit mode
2
0 standby,
2 cooling,
3 heating
2
Outdoor unit set compressor speed
3
Opening of EEV
4
T3(outdoor coil temp.) (°F )
5
T4 (outdoor ambient temp.) (°F )
6
T5(compressor discharge temp.) (°F )
7
Reserved
8
Te (evaporating temp.) (°F )
9
Tc (condensing temp.) (°F )
10
Tf (module temp.) (°F )
11
Pe (evaporating pressure) (PSI)
12
Pc (evaporating pressure) (PSI)
13
Compressor discharge superheat (°F )
14
Reserved
15
Reserved
16
Compressor current (A)
17
Reserved
18
Fan speed
19
Reserved
20
Reserved
21
Compressor discharge superheat (only useful for heating
mode) (°F )
22
Reserved
23
Last Fault Code
24
Software version
25
Remark“--”
Actual value
Actual value
Target Value
Table 10
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
15.9
Bosch IDS BOVA | 25
Control board overviews
For 2436 model
18 17
16 15
14
13
12
11
10
19
9
8
7
20
6
5
4
21
3
2
EEPROM
chip
1
22
23
24
THE FACTORY SETTING FOR 36K MODEL,
CUT OFF J2 JUMP FOR 24K MODEL.
Figure 42
* The photo is just for reference,actual unit will verify.
No.
Function description
No.
Function description
1
Compressor wiring terminal
13
Temp. controller connecting port
2
Reactor wiring terminal(connect a reactor between 2 and 3 )
14
Function dial code SW4
3
Reactor wiring terminal(connect a reactor between 2 and 3 )
15
Spot check button
4
Defrosting function dial codeSW5
16
Forced operation button
5
Pressure transducer port
17
Reserved
6
Air discharge temp.sensor port
18
Digital tube display
7
Outdoor temp.sensor port(HP only)
19
Fan control port
8
Condenser temp.sensor port
20
Crankcase heating zone control terminal
9
Radiator temp.sensor port
21
Short wire
10
High pressure switch port
22
Power supply connecting terminal
11
EEV drive port(HP only)
23
Power supply connecting terminal
12
Reversing valve port
24
Indicator lamp
Table 11
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
2 6 | Bosch IDS BOVA
Installation Instructions
For 4860 model
Main control board
19
14
15
16
17
18
20
21
22
1
2
3
4
EEPROM
chip
5
6
7
8
13
9
11
12
10
THE FACTORY SETTING FOR 36K MODEL,
CUT OFF J2 JUMP FOR 24K MODEL.
Figure 43
* The photo is just for reference,actual unit will verify.
No.
Function description
No.
Function description
EEV driving port (HP only)
12
The voltage between 12 and 13 is 380Vdc (Compressor is running )
2
High pressure switch port
13
The voltage between 12 and 13 is 380Vdc (Compressor is running )
3
Radiator temp. sensor port
14
DC motor control port
4
Condenser temp.sensor port
15
Nixie tube display
5
Outdoor temp.sensor port (HP only)
16
Reserved
6
Air discharge temp.sensor port
17
Defrosting functiondialcode SW5
7
Pressure transducer
18
Function dial code SW4
8
Connection wire port between main boards
19
Point check button
9
DC motor driving source (15V-P2)
20
Temp. controller connection port
10
The voltage between 10 and 11 is 380Vdc (Compressor is running )
21
Forced operation button
11
The voltage between 10 and 11 is 380Vdc (Compressor is running )
22
4-way valve port (HP only)
1
Table 12
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 27
For 4860 model
Drive board
23
24 25
26
36
27
35
34
33
32
31
30
29
28
Figure 44
* The photo is just for reference,actual unit will verify.
No.
Function description
No.
Function description
23
Connect the cathode of the rectifier bridge
30
AC power supply output port
24
DC motor driving source(15V-P2)
31
AC power supply output port
25
The voltage between 25 and 26 is 380Vdc (Compressor is running )
32
Compressor connection terminal
26
The voltage between 25 and 26 is 380Vdc (Compressor is running )
33
The voltage between 33 and 36 is 380Vdc (Compressor is running )
27
Connection wire port between main boards
34
Reactor L1 wiring terminal
28
AC power supply input port
35
Reactor L2 wiring terminal
29
AC power supply input port
36
The voltage between 33 and 36 is 380Vdc (Compressor is running)
Table 13
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
2 8 | Bosch IDS BOVA
15.10
Installation Instructions
Error code troubleshooting
Error Code
Description
P1
High pressure switch(HPS)protection
P5
Condenser coil temperature(T3) protection in cooling
Hb
High pressure(PT) protection in Heating
P3
Compressor over current protection
P5 ( Condenser coil temperature(T3) protection in cooling)
Handling
Diagnosis
No
Open the service valves
Check whether T3 is normal
No
according to Table 1(between
temperature and resistance)
Replace the T3 sensor
Check whether the service
valves are open
Yes
Table 14
P1 (High pressure switch(HPS)protection)
Handling
Diagnosis
Check whether the service
valves are open
No
Yes
Check whether outdoor unit
motor is abnormal or whether Yes
the outdoor condenser coil is
blocked
No
Open the service valve
Replace the fan or
remove all the barriers
Yes
Check whether the switch
wires is seated normally
No
Yes
Check whether there is short
circuit in air outlet and inlet side
Reseat the wires according
to wiring diagram
Do something to avoid air
return short circuit
No
Yes
Check whether high pressure No
switch is close
Check whether the charge is
No
correct by subcooling
according to installation guide
in charge mode when cooling
Replace high pressure switch
Adjust refrigerant charge
Yes
Yes
Check whether indoor and
outdoor units are normal by
valve, filter and airflow
No
Check whether there is normal No
of throttle
Exclude all fault reasons
and restart
Adjust or repair the TXV
throttle
Yes
Yes
Cooling mode refers to P5
Heating mode refers to Hb
Figure 46
Figure 45
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 29
Error Code
Hb ( High pressure(PT) protection in Heating)
Diagnosis
Handling
Check whether the service
valves are open
No
P0
High module radiator temperature (TF) protection
Table 15
Open the service valve
P0 (High module radiator temperature (TF)protection)
Diagnosis
Handling
Yes
Check whether indoor unit is
normal by filter and airflow
No
Check whether there`s dust or
fallen leaves influencing
radiator
Exclude indoor unit fault
reasons and restart
Yes
Check whether the Tf is
normal according to Table
2(between temperature and
resistance)
Yes
Remove e.g. indoor side
E-heater or other heat
sources
No
Restart system and check
whether EEV is working
Yes
Clean all the dust
and fallen leaves
No
Yes
Check whether indoor air inlet
temp. is over 86°F
Description
No
Restart system and check
whether the fan and motor
can normally operate
Reseat the EEV throttle
No
No
Replace Tf sensor
Replace the fan and motor
Yes
Yes
Make a comparison between No
the pressure gauge and the
read from check data
No
Operate system and check
whether there`s the same fault
Reseat or replace the
PT sensor
Operate normally
Yes
Yes
Figure 49
Figure 47
P3 ( Compressor over current protection)
Handling
Diagnosis
Check whether the service
valves are open
No
Open the service valve
Check whether compressor
wiring is normal
Description
P2
Low pressure(PT) Protection in cooling
H5
System lockup, 5 times (P2) protection in 100 minutes
P4
High compressor discharge temperature(T5) protection
Table 16
Yes
Check whether outdoor unit
motor is abnormal and the
outdoor condenser coil is
blocked
No
Error Code
Yes
Replace the fan or
remove all the barriers
P2 ( Low pressure(PT) Protection in cooling)
H5 ( System lockup, 5 times (P2) protection in 100 minutes)
Diagnosis
No
Wiring correctly according to
the wiring diagram
Check whether the service
valves are open
Handling
No
Open the service valve
Yes
Yes
Check whether compressor
No
insulation resistance is greater
than 100KΩ
Replace compressor
Check whether indoor unit is
normal by valve, filter, airflow
and throttle
Yes
No
Exclude indoor unit
fault reasons and
restart
Yes
Restart system and check whether
Yes
the difference of high and low
pressure is more than 30 PSI after
compressor running 10 min
Check whether the charge is
correct by subcooling
according to installation guide
in charge mode when cooling
Replace compressor
No
No
Adjust the charge
Yes
Check whether the
compressor current is more
than 18A when protection
No
Check whether the pressure
transduce is measuring
properly from the 8th or 11th
data of check when cooling
Replace the board
Yes
Bosch Thermotechnology Corp. | 12.2016
Replace the pressure
transducer
Yes
Replace the compressor
Figure 48
No
Figure 50
Data subject to change
3 0 | Bosch IDS BOVA
Installation Instructions
Error Code
P4 ( Compressor discharge sensor(T5) is seated fault)
Diagnosis
Handling
Check whether the service
valves are open
No
Open the service valve
Description
E4
Temperature sensor fault(T3, T4, T5, TF)
H8
Pressure transducer(PT) fault
F1
High pressure switch(HPS) fault
Table 18
Yes
Check whether the T5 is normal No
according to Table 2(between
temperature and resistance)
Replace the T5 sensor
E4 ( Temperature sensor fault(T3, T4, T5, TF))
Diagnosis
Handling
Yes
Check whether the charge is
correct by subcooling
according to installation guide
in charge mode when cooling
No
Check whether sensor
No
T3/T4/T5/Tf are seated and
normal (T4 for Heat Pump only)
Adjust the charge
Reseat the sensor
according to wiring diagram
Yes
Yes
Check whether the compresNo
sor is normal (abnormal noise,
abnormal vibration)
Unplug the sensor, Check
No
whether the resistance of
T3/T4 is in the range of Table 1
Replace the compressor
Replace the fault T3/T4
sensor
Yes
Yes
Check whether the EEV is
No
normal for throttle when heating
(wire seated .coil)
Unplug the sensor, Check
No
whether the resistance of T5/Tf
Replace the fault T5/Tf sensor
is in the range of Table 2
Re-power and check
again,if the same, replace
the EEV
Yes
Yes
Check whether the display the
same error code when
re-powered on
Figure 51
No
Keep running
Yes
Error Code
PH
Description
Low discharge superheat protection
Figure 53
Table 17
H8 ( Pressure transducer(PT) fault)
Handling
Diagnosis
PH ( Low discharge superheat protection)
Handling
Diagnosis
Check whether T3/T5 are
normal according to Table1,
Table 2
No
Replace fault sensors
Check whether pressure
transducer(PT) wiring are
seated and normal
Replace the pressure
transducer
Check whether the pressure
transduce is measuring
properly from the 8th or 11th
data of check when cooling
Wiring according to the
diagram correctly
No
Replace the pressure
transducer
Yes
Yes
Check whether the pressure
transduce is measuring properly
from the 8th or 11th data of check
when cooling(from the 9th or 12th
data of check when heatling)
No
No
Yes
Yes
Check whether indoor unit is
normal by filter, airflow(motor), No
and coil(be blocked up) when
cooling
Yes
No
Check whether the suction
superheat is correct in cooling
Check whether the outdoor
fan is correct and outdoor
coil is blocked in heating
No
Check whether there is the
same fault
Exclude indoor unit fault
reasons and restart
No
Keep running
Yes
1.Not applicable for piston
2.Adjust(close) the TXV superheat
3.To further adjust to SW4-4”on
Figure 54
1. Exclude outdoor unit fault
reasons and restart
2. Ensure the reserving coil is
seated well
Yes
Figure 52
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 31
F1 ( High pressure switch(HPS) fault)
Handling
Diagnosis
Check whether the service
valves are open
No
Open the service valve
E7 Compressor discharge sensor(T5) is seated fault)
Handling
Diagnosis
Check whether condenser coil No
sensor(T5) is seated to the
condenser coil
Yes
Check whether high pressure
switch(HPS) wiring is seated
and normal
Reseat the sensor to
discharge tube
Yes
No
Wiring according to the
diagram correctly
Check whether the sensor of No
T3/T5 are connected according to wiring diagram
Wiring according to the
wiring diagram correctly
Yes
Yes
Check whether the
No
resistance of HPS is close to
0KΩ
Replace high pressure
switch
Yes
Check whether there is the
same fault
No
Check whether the resistance
of T3/T5 is in the range of
Table 1 and Table 2
No
Replace the fault T3/T5 sensor
Yes
Keep running
Check whether there are other
heat sources around T3/T5
Yes
No
Remove all the other heat
sources
Yes
Figure 55
Check whether there is the
same fault
Error Code
Yes
Keep running
Description
C3
Condenser coil sensor(T3) is seated fault in cooling
E7
Compressor discharge sensor(T5) is seated fault
Figure 57
Error Code
Table 19
C3 Condenser coil sensor(T3) is seated fault in cooling)
Handling
Diagnosis
Check whether condenser
No
coil sensor(T3) is seated
to the condenser coil
Description
E6
DC fan motor fault
Eb
System lockup, 2 times (E6) protection in 10 minutes
Table 20
Reseat the sensor to
condenser coil
When E6 appears occasionally, you don`t need to do anything, the system will restart
automatically after 6 minutes, of course, if you check the system of running, it will be
better. When Eb appears, you need to check the motor.
Wiring according to the
wiring diagram correctly
E6 DC fan motor fault)
Eb System lockup, 2 times (E6) protection in 10 minutes)
Yes
Check whether the sensor of
T3/T4/HPS are connected No
according to wiring diagram
Diagnosis
Yes
Check whether the
resistance of T3/T4 is in
the range of Table 1
No
Handling
Check whether DC motor
wiring is reliably connected
according to the wiring
diagram
Replace the fault
T3/T4 sensor
No
Reseat the wiring
according to wiring
No
Remove all the barriers
Yes
Yes
Check whether there are
No
other heat sources around
T3/T4
Check whether outdoor
coil air return is blocked
Remove all the other
heat sources
Yes
Yes
Check whether there is the No
same fault
Check whether there is
15V DC between the test
point P8 and P2
Keep running
No
Replace the control board
Yes
Yes
Check whether there is
the same fault
Figure 56
Yes
No
Keep running
NOTE: Just for 4T/5T
Figure 58
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
3 2 | Bosch IDS BOVA
Error Code
Installation Instructions
Description
E9
EEPROM fault
H0
Communication fault in main control chip
E5
High/low voltage protection
E5 ( High/low voltage protection)
Handling
Diagnosis
Check whether the power
supply voltage is between
187-253V
Table 21
No
Make sure the power
supply is within correct
range
Yes
When E9/H0/E5 appears occasionally, and the system restart to run normally after
power supply again, you don`t need to do anything. Otherwise, you need to check
the system.
Check whether the power wires are
connected firmly, whether the power No
supply wires diameter meets the
requirements from the manufacture
Replace the power supply
wires or connect the power
supply wires well
Yes
E9 (EEPROM fault)
Diagnosis
Check whether the wiring is
connected normally
No
Restart to the power supply
No
and check whether the
compressor operates normally
Handling
Replace the drive board
Yes
Reseat the wiring according
to wiring diagram
Gauge and check whether
there is 380V DC between the No
terminals P2 and P4 when
compressor is running
Yes
Replace the drive board
Yes
Restart to power on and
check whether it is normal
No
Reseat the wiring according
to wiring diagram
Check whether there are
high voltage equipment
nearby
Yes
Separate high-power
equipment and power
supply
The fault is still
Yes
No
You need do nothing. Perhaps this
fault is caused by accident, such as
strong interference form electricity
grid. System will recovery when
electricity grid is normal
Replace the control board
Figure 61
Figure 59
H0 ( Communication fault in main control chip)
Handling
Diagnosis
Check whether the wiring is
connected normally
No
Reseat the wiring according
to wiring diagram
No
3T: Replace the control board
5T: Reseat the communication
wire
Yes
Restart to power on and
check whether it is normal
Yes
You need do nothing. Perhaps this
fault is caused by accident, such as
No
strong interference form electricity grid.
System will recovery when electricity
grid is normal
The fault is still
5T: Replace the control board
The fault is still
5T: Replace the drive board
Figure 60
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Error Code
Bosch IDS BOVA | 33
Description
Error Code
P6
IPM module protection
H4
System lockup, 3 times (P6/L0-9) protection in 60 minutes
L0-L9
AtL
Description
Ambient Temperature Limited
Table 23
IPM module protection (the same as P6, only for analysis)
Table 22
When the ambient temperature returns to within the operating range, the
system recovery automatically.
When P6/L0-L9 appears occasionally, you don`t need to do anything, the system will
restart automatically after 6 minutes, of course, if you check the system of running,
it will be better.
At L ( Ambient Temperature Limited)
Handling
Diagnosis
P6/L0-L9 ( IPM module protection)
H4 ( System lockup, 3 times (P6/L0-9) protection in 60 minutes)
Diagnosis
Check whether the service
valves are open
Handling
No
Open the service valves
Yes
Check whether the compressor No
wiring is normal
Reseat the wiring according
to wiring diagram
Check whether the ambient
temperature is beyond the range
cooling:40°F-120°F
heating:5°F-86°F
Yes
Normal
No
Check whether sensor T4 are
seated and normal (T4 for
Heat Pump only)
No
Reseat the sensor according
to wiring diagram
Yes
Yes
Check whether compressor
insulation resistance is greater
than 100KΩ
No
Replace the compressor
Unplug the sensor, Check
whether the resistance of T4
is in the range of Table 1
No
Replace the fault T3/T4
sensor
Yes
Yes
Check whether the resistance of No
compressor U/V/W are normal
Replace the compressor
You need do nothing. Try to
start again
Yes
Check whether there is the
same fault
No
Keep running
Figure 63
Yes
Replace the board and
check whether there is the
same fault.
No
Keep running
Yes
Yes
Replace the compressor and
check whether there is the
same faultt
No
Keep running
Figure 62
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
3 4 | Bosch IDS BOVA
TEMP F
Installation Instructions
TEMP C
RESISTANCE kΩ
VOLTS DC
TEMP F
TEMP C
-5
-20.6
107.732
0
-17.8
93.535
RESISTANCE kΩ
VOLTS DC
4.65
90
32.2
7.225
2.36
4.6
95
35
6.401
2.21
5
-15
79.521
4.54
100
37.8
5.683
2.07
10
-12.2
67.795
4.47
105
40.6
5.057
1.93
15
-9.4
57.948
4.39
110
43.3
4.509
1.79
20
-6.7
49.652
4.3
115
46.1
4.028
1.67
25
-3.9
42.645
4.21
120
48.9
3.606
1.55
30
-1.1
36.710
4.1
125
51.7
3.233
1.43
40
4.4
27.386
3.86
130
54.4
2.902
1.32
45
7.2
23.732
3.73
135
57.2
2.610
1.22
50
10
20.610
3.59
140
60
2.350
1.13
55
12.8
17.939
3.45
145
62.8
2.119
1.04
60
15.6
15.648
3.3
150
65.6
1.914
0.96
65
18.3
13.681
3.15
155
68.3
1.731
0.88
70
21.1
11.987
2.99
160
71.1
1.574
0.82
75
23.9
10.527
2.83
165
73.9
1.416
0.75
80
26.7
9.265
2.67
170
76.7
1.276
0.68
85
29.4
8.172
2.52
Table 24
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 35
TEMP F
TEMP C
RESISTANCE kΩ
VOLTS DC
TEMP F
TEMP C
RESISTANCE kΩ
VOLTS DC
-5
-20.6
600.134
4.93
0
-17.8
505.551
4.92
140
60
13.643
3.14
145
62.8
12.359
3.03
5
-15
427.463
4.91
150
65.6
11.214
2.91
10
-12.2
362.739
4.89
155
68.3
10.227
2.8
15
-9.4
308.891
4.87
160
71.1
9.308
2.68
20
-6.7
265.398
4.85
165
73.9
8.485
2.56
25
-3.9
227.481
4.83
170
76.7
7.746
2.45
30
-1.1
195.601
4.8
175
79.4
7.105
2.34
35
1.7
168.707
4.77
180
82.2
6.504
2.23
40
4.4
146.695
4.74
185
85
5.963
2.13
45
7.2
127.258
4.7
190
87.8
5.474
2.02
50
10
110.707
4.66
195
90.6
5.032
1.92
55
12.8
96.572
4.61
200
93.3
4.645
1.83
60
15.6
84.465
4.56
205
96.1
4.28
1.73
65
18.3
74.411
4.51
210
98.9
3.949
1.64
70
21.1
65.408
4.45
215
101.7
3.648
1.56
75
23.9
57.634
4.39
220
104.4
3.383
1.48
80
26.7
50.904
4.32
225
107.2
3.133
1.4
85
29.4
45.258
4.24
230
110
2.904
1.32
90
32.2
40.152
4.16
235
112.8
2.694
1.25
95
35
35.699
4.08
240
115.6
2.503
1.18
100
37.8
31.807
3.99
245
118.3
2.334
1.12
105
40.6
28.398
3.89
250
121.1
2.172
1.06
110
43.3
25.506
3.8
255
123.9
2.024
1
115
46.1
22.861
3.7
260
126.7
1.888
0.95
120
48.9
20.529
3.59
265
129.4
1.767
0.9
125
51.7
18.47
3.48
270
132.2
1.651
0.85
130
54.4
16.708
3.37
275
135
1.544
0.8
135
57.2
15.085
3.26
280
137.8
1.446
0.76
Table 25
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
3 6 | Bosch IDS BOVA
Installation Instructions
NSK-BD035I
V= (7.9*PSIG*10-3)+0.5
Pe/Pc
No.
V
Pe/Pc
No.
V
PSIG
1
0.69
24.4
Pe/Pc
No.
V
111
2.54
PSIG
56
1.37
110.6
PSIG
258.5
2
0.7
26.0
57
1.39
112.5
112
2.56
262.0
3
0.72
27.7
58
1.4
114.5
113
2.59
265.6
4
0.73
29.4
59
1.42
116.5
114
2.62
269.2
5
0.75
31.2
60
1.43
118.6
115
2.65
272.8
6
0.76
33.1
61
1.45
120.6
116
2.68
276.5
7
0.78
35.0
62
1.47
122.7
117
2.71
280.2
8
0.79
37.0
63
1.48
124.8
118
2.74
284.0
9
0.81
39.0
64
1.5
127.0
119
2.77
287.8
10
0.82
41.1
65
1.52
129.1
120
2.8
291.6
11
0.84
43.2
66
1.53
131.3
121
2.83
295.5
12
0.85
44.3
67
1.55
133.5
122
2.86
299.3
13
0.86
45.4
68
1.57
135.8
123
2.89
303.3
14
0.87
46.6
69
1.59
138.0
124
2.92
307.2
15
0.88
47.7
70
1.61
140.3
125
2.95
311.3
16
0.89
48.9
71
1.62
142.6
126
2.98
315.3
17
0.89
50.0
72
1.64
145.0
127
3.02
319.4
18
0.9
51.2
73
1.66
147.3
128
3.05
323.5
19
0.91
52.4
74
1.68
149.7
129
3.08
327.7
20
0.92
53.7
75
1.7
152.1
130
3.12
331.9
21
0.93
54.9
76
1.72
154.6
131
3.15
336.1
22
0.94
56.2
77
1.74
157.1
132
3.18
340.4
23
0.95
57.5
78
1.76
159.6
133
3.22
344.7
24
0.96
58.8
79
1.78
162.1
134
3.25
349.0
25
0.97
60.1
80
1.8
164.6
135
3.29
353.4
26
0.98
61.4
81
1.82
167.2
136
3.32
357.9
27
0.99
62.8
82
1.84
169.8
137
3.36
362.4
28
1.01
64.1
83
1.86
172.5
138
3.39
366.9
29
1.02
65.5
84
1.88
175.1
139
3.43
371.4
30
1.03
66.9
85
1.9
177.8
140
3.46
376.0
31
1.04
68.4
86
1.92
180.5
141
3.5
380.7
32
1.05
69.8
87
1.94
183.3
142
3.54
385.4
33
1.06
71.3
88
1.97
186.1
143
3.57
390.1
34
1.07
72.7
89
1.99
188.9
144
3.61
394.9
35
1.09
74.3
90
2.01
191.7
145
3.65
399.7
36
1.1
75.8
91
2.03
194.6
146
3.69
404.5
37
1.11
77.3
92
2.06
197.5
147
3.73
409.5
38
1.12
78.9
93
2.08
200.4
148
3.77
414.4
39
1.13
80.5
94
2.1
203.4
149
3.8
419.4
40
1.15
82.1
95
2.13
206.4
150
3.84
424.4
41
1.16
83.7
96
2.15
209.4
151
3.88
429.5
42
1.17
85.3
97
2.17
212.4
152
3.93
434.6
43
1.19
87.0
98
2.2
215.5
153
3.97
439.8
44
1.2
88.7
99
2.22
218.6
154
4.01
445.0
45
1.21
90.4
100
2.25
221.8
155
4.05
450.3
46
1.23
92.1
101
2.27
224.9
156
4.09
455.6
47
1.24
93.8
102
2.3
228.1
157
4.13
461.0
48
1.25
95.6
103
2.32
231.4
158
4.18
466.4
49
1.27
97.4
104
2.35
234.6
159
4.22
471.9
50
1.28
99.2
105
2.38
238.0
160
4.26
477.4
51
1.3
101.0
106
2.4
241.3
161
4.31
482.9
52
1.31
102.9
107
2.43
244.7
162
4.35
488.6
53
1.33
104.8
108
2.45
248.1
163
4.39
494.2
54
1.34
106.7
109
2.48
251.5
164
4.44
499.9
55
1.36
108.6
110
2.51
255.0
165
4.48
505.7
Table 26
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Bosch Thermotechnology Corp. | 12.2016
Temperature sensor fault(T3 T4 T5 TF)
High/low voltage protection
E4
E5
E7
E9
Compressor current protection limit
Voltage protection limit
Compressor oil return
C
U
H
Ambient Temperature Limited
TF high temperature limit
F
Defrost mode
Compression ratio protection limit
P
DF
T5 high temperature limit
D
AtL
T3 high temperature limit
Forced operation mode
IPM module protection or frequent power on/off
EEPROM fault
L
L0-L9
High pressure(PT) protection in Heating
The discharge sensor(T5) is not seated fault
Pressure transducer(PT) short or open fault
H8
Hb
0
3 times (P6) protection in 60 minutes,system lockup
Low discharge superheat protection
H Communication fault in main control chip
PH
5 times (P2) protection in 100 minutes,system lockup
IPM module protection
P6
H4
High condensor coil temp. (T3) protection
P5
H5
The discharge temp. (T5) Protection
Low pressure(PT) Protection
Compressor over current protection
High pressure (HPS) protection
P1
P2
P3
The module radiator temperature (TF)protection
P0
P4
The T3 sensor is not seated fault
High pressure switch(HPS) fault
F1
Fault description
C3
CODE
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PERSONAL INJURY OR DEATH
OFF
*
3 4
OFF
AMBIENT TEMPERATURE SENSOR( FOR HP SYSTEM)
10K RESISTANCE ( FOR COOLING ONLY SYSTEM)
HIGH PRESSURE SWITCH
CRANKCASE HEATER
ELECTRIC EXPANSIVE VALVE
COMPRESSOR
RADIATOR TEMP. SENSOR
PRESSURE TRANSDUCER
T COMP. DISCHARGE TEMPERATURE SENSOR
T
T CONDENSER TEMPERATURE SENSOR
4-WAY VALVE
PFC INDUCTANCE
CAPACITANCE
WARNING: CABINET MUST BE PERMANMENTLY
GOUNDED AND ALL WIRING TO CONFORM TO
I.E.C,N.E.C,C.E.C,C.L.C,AND LOCAL CODES AS APPLICABLE
REPLACEMENT WIRE MUST BE THE SAME GAUGE AND
INSULATION TYPE AS ORIGINAL WIRE
CCH
HPS
EEV
COMP
TF
PT
5
4
3
SV1
PFC-L
RC 2
Detailed reference manual instructions
Not used
Not used
ON Adaptive capacity output disable
SW4-3
OFF Adaptive capacity output enable
ON Accelerated cooling/heating
SW4-4
OFF Normally cooling/heating
SW4-1
SW4-2
V
W
U
CCH
ORANGE
W
V
BLACK
BLUE
ORANGE
PRESS
CHECK THE SYSTEM PARAMETERS
1s
U
ORANGE
ORANGE
BROWN
Y/G
YELLOW
YELLOW
PRESS FORCED DEFROSTING
6s
PRESS
TEST MODE (NOT USED)
6s
FORCED COOLING /HEATING
FORCE PRESS
(CHARGE MODEL)
1s
CHECK
SW5-1
ON Operating time is reduced by 10%
Enter defrost OFF Normal
ON Defrosting extended for 60 seconds
SW5-2
Quit defrost OFF Normal
*
ON
CHECK
DSP1
N
P
W
V
U
C
4
2
-
P
B
Y
W
B AND W ONLY FOR HP MODEL
+
P
FORCE
3 4
USE COPPER CONDUCTORS ONLY
L1 L2
BROWN
H
L
COM
PFC-L
IPM module protection
ON
OFF
0
ON:Compressor operation
OFF:Control board fault
FLASH:Standby
GREEN LED
Compressor phase error
IPM control fault
Low dc voltage protection
8
9
Communication fault
4
RED LED FLSAH
PT
T5
T4
T3
TF
HPS
EEV
ONLY FOR HP MODEL
SV1
16.1
WAIT 2 MINUTES AFTER DISCONNECTING POWER,THEN
VERIFY DC VOLTAGE LESS THAN 42 VDC AT INVERTER
TEST POINTS P2-P4. COMPONENTS MAY STORE A
DANGEROUS ELECTRICAL POTENTIAL OF 380 VOLTS DC.
ON
* The factory Default
16
ELECTRIC HAZARD 380 VOLTS DC
WARNING
Installation Instructions
Bosch IDS BOVA | 37
Wiring diagrams
For BOVA 36
Figure 64
Data subject to change
ELECTRIC HAZARD 380 VOLTS DC
The module radiator temperature (TF)protection
High pressure (HPS) protection
Low pressure(PT) Protection
Compressor over current protection
The discharge temp. (T5) Protection
High condensor coil temp. (T3) protection
IPM module protection
Hurricane protection of the fan motor
Low discharge superheat protection
Communication fault in main control chip
P1
P2
P3
P4
P5
P6
P8
PH
H0
Temperature sensor fault(T3 T4 T5 TF)
High/low voltage protection
DC fan motor fault
The discharge sensor(T5) is not seated fault
Hb
E4
E5
E6
E7
E9
TF high temperature limit
Compressor current protection limit
Voltage protection limit
Compressor oil return
Defrost mode
Ambient Temperature Limited
F
U
H
DF
AtL
P
C
T5 high temperature limit
Compression ratio protection limit
D
T3 high temperature limit
Forced operation mode
IPM module protection or frequent power on/off
2 times (E6) protection in 10 minutes,system lockup
L
L0-L9
Eb
High pressure(PT) protection in Heating
H8
EEPROM fault
5 times (P2) protection in 100 minutes,system lockup
Pressure transducer(PT) short or open fault
H5
3 times (P6) protection in 60 minutes,system lockup
High pressure switch(HPS) fault
F1
P0
H4
The T3 sensor is not seated fault
Fault description
C3
CODE
FAILURE TO FOLLOW THIS WARNING COULD RESULT
IN PERSONAL INJURY OR DEATH
WAIT 2 MINUTES AFTER DISCONNECTING POWER,THEN
VERIFY DC VOLTAGE LESS THAN 42 VDC AT INVERTER
TEST POINTS P2-P4. COMPONENTS MAY STORE A
DANGEROUS ELECTRICAL POTENTIAL OF 380 VOLTS DC.
OFF
3 4
Normal
HIGH PRESSURE SWITCH
CRANKCASE HEATER
ELECTRIC EXPANSIVE VALVE
COMPRESSOR
RADIATOR TEMP. SENSOR
PRESSURE TRANSDUCER
COMP. DISCHARGE TEMPERATURE SENSOR
10K RESISTANCE ( FOR COOLING ONLY SYSTEM)
AMBIENT TEMPERATURE SENSOR( FOR HP SYSTEM)
CONDENSER TEMPERATURE SENSOR
4-WAY VALVE
PFC INDUCTANCE
WARNING: CABINET MUST BE PERMANMENTLY
GOUNDED AND ALL WIRING TO CONFORM TO
I.E.C,N.E.C,C.E.C,C.L.C,AND LOCAL CODES AS APPLICABLE
REPLACEMENT WIRE MUST BE THE SAME GAUGE AND
INSULATION TYPE AS ORIGINAL WIRE
HPS
CCH
EEV
COMP
TF
T5
PT
T4
T3
SV1
PFC-L
PRESS
TEST MODE (NOT USED)
6s
FORCE PRESS FORCED COOLING /HEATING
1s
(CHARGE MODEL)
PRESS FORCED DEFROSTING
6s
PRESS
CHECK SYSTEM PARAMETERS
1s
Detailed reference manual instructions
CHECK
OFF
Operating time is reduced by 10%
Normal
Defrosting extended for 60 seconds
*
Not used
Not used
ON Adaptive capacity output disable
SW4-3
OFF Adaptive capacity output enable
ON Accelerated cooling/heating
SW4-4
OFF Normally cooling/heating
SW4-1
SW4-2
SW5-1
ON
Enter defrost OFF
ON
SW5-2
Quit defrost OFF
*
ON
ON
OFF
0
U
V
PFC-L
PFC-L
RED
U
2
CCH
W
1
4
3
5
DB1
ORANGE
ORANGE
W
V
YELLOW
YELLOW
CN19
N_1
VIN_N
ON:Compressor operation
OFF: Control board fault
FLASH:Standby
GREEN LED
Compressor phase error
IPM control fault
Low dc voltage protection
IPM module protection
8
9
Communication fault
4
RED LED FLSAH
BLUE
* The factory Default
BLUE
ON
P10
- +
P9
N
V
U
P
W
DISP
CHECK
BROWN
Data subject to change
3 4
-
P2
+
P4
TEST POINTS
P8
FORCE
BROWN
CN6
CN1
CN9
L1 L2
C
B
Y
W
B AND W ONLY FOR HP MODEL
USE COPPER CONDUCTORS ONLY
RED
PT
T5
T4
T3
TF
HPS
EEV
ONLY FOR HP MODEL
ONLY FOR HP MODEL
SV1
16.2
YELLOW
WARNING
3 8 | Bosch IDS BOVA
Installation Instructions
For BOVA 60
Figure 65
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
17
Bosch IDS BOVA | 39
Spare parts
17.1
For BOVA 36
Main Control Board
2.4
2
3
2.1
2.3
2.2
Figure 66
No.
Qty
BOVA 36 (3 Ton)
No.
Part Name
Qty
BOVA 36 (3 Ton)
1
Part Name
Upside board ass'y
1
8733941794
16
High pressure valve Ass'y
1
8733941821
2
E-part box ass'y
1
8733941795
16.1
Block valve
1
8733941822
2.1
Main control board ass'y
1
8733941796
16.2
One way valve
1
8733941823
2.2
Wire joint
1
8733941797
16.3
Electronic expansion valve body
1
8733941824
2.3
Wire joint, 5p
1
8733941798
16.4
EEV solenoid wire rings
1
8733941825
2.4
Capacitor for fan motor
1
8733941799
17
meter connector ass'y
1
8733941826
3
E-part box ass'y
1
8733941800
17.1
Pipe joint
1
8733941827
4
Nut
1
8733941801
18
Gas-liquid separator
1
8733941828
5
Fan
1
8733941802
19
Compressor
1
8733941829
6
Motor
1
8733941803
20
Chassis Parts
1
8733941830
7
Top conver ass'y
1
8733941804
21
Rubber Cap
1
8733941831
8
Top cover veil
1
8733941805
22
Soundproof cotton
1
8733941832
9
Bolt and washer assembly
4
8733941806
23
Rear clapboard ass'y
1
8733941833
10
Supporting board
3
8733941807
24
Compressor electric heater (with spring)
1
8733941834
11
Clapboard ass'y 1
2
8733941808
25
Compressor Discharge Temp. sensor ass'y
1
8733941835
12
Clapboard ass'y 2
2
8733941809
26
Condenser Pipe Temp. sensor ass'y
1
8733941836
13
Condenser components
1
8733941810
13.1
Condenser
1
8733941811
13.2
Condenser output pipe ass'y
1
8733941812
13.3
Condenser input pipe ass'y
1
8733941813
13.4
Condenser connection pipe ass'y
1
8733941814
14
4-way valve ass'y
1
8733941815
14.1
4-way valve ass'y
1
8733941816
14.2
Pressure sensor
1
8733941817
14.3
Pressure controller
1
8733941818
14.4
Block valve
1
8733941819
Suction pipe ass'y
1
8733941820
15
Table 27
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
4 0 | Bosch IDS BOVA
17.2
Installation Instructions
For BOVA 60
Main Control Board
2.1
2.6
2.2
2.5
2.3
2.4
2.7
Figure 67
No.
Qty
BOVA 60 (5 Ton)
No.
Part Name
1
Side board ass'y
Part Name
1
8733941837
15.2
Pressure controller
Qty
1
BOVA 60 (5 Ton)
8733941857
2
E-part box ass'y
1
8733941838
15.3
Pressure sensor
1
8733941817
2.1
Main control board ass'y
1
8733941839
15.4
Block valve
1
8733941858
2.2
Three phase bridge
1
8733941840
16
Suction pipe ass'y
1
8733941859
2.3
Wire joint, 5p
1
8733941798
17
High-pressure valve ass'y
1
8733941860
2.4
Wire joint, 3p
1
8733941841
17.1
One way valve
1
8733941823
2.5
Main control board ass'y
1
8733941842
17.2
Electronic expansion valve body
1
8733941861
2.6
EMC Solenoid
4
8733941843
17.3
EEV solenoid wire rings
1
8733941862
2.7
Electric reactor
2
8733941844
17.4
Block valve
1
8733941822
3
Nut
1
8733941801
18
Gas-liquid separator
1
8733941863
4
Fan
1
8733941802
19
meter connector ass'y
1
8733941864
5
Electrical installation bolt
4
8733941845
19.1
Pipe joint
1
8733941827
6
BLDC
1
8733941846
20
Chassis Parts
1
8733941830
7
Top conver ass'y
1
8733941804
21
Compressor
1
8733941865
8
Top cover veil
1
8733941805
22
Compressor electric heater (with spring)
1
8733941866
9
Bolt and washer assembly
4
8733941806
23
Compressor Discharge Temp. sensor ass'y
1
8733941867
10
Motor installation board ass'y
1
8733941847
24
Condenser Pipe Temp. sensor ass'y
1
8733941868
11
Side board ass'y 2
2
8733941848
25
Ambient Temp. sensor ass'y
1
8733941869
12
Side board ass'y
2
8733941849
26
Rear clapboard ass'y
1
8733941833
13
Supporting board
3
8733941850
27
Rubber Cap
1
8733941831
14
Condenser ass'y
1
8733941851
28
Soundproof cotton
1
8733941870
14.1
Condenser connection pipe ass'y
1
8733941814
14.2
Condenser
1
8733941852
14.3
Condenser outlet pie ass'y
1
8733941853
14.4
Condenser inlet pie ass'y
1
8733941854
15
4-way valve ass'y
1
8733941855
15.1
4-way valve ass'y
1
8733941856
Table 28
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 41
Notes:
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
4 2 | Bosch IDS BOVA
Installation Instructions
Notes:
Data subject to change
12.2016 | Bosch Thermotechnology Corp.
Installation Instructions
Bosch IDS BOVA | 43
Notes:
Bosch Thermotechnology Corp. | 12.2016
Data subject to change
United States and Canada
Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 03053
Tel: 866-642-3198
Fax: 954-776-5529
www.boschheatingandcooling.com
BTC 761701102 D / 12.2016