Bosch BP007-1HZC-FRS, CP030-1VTN-FRT, BP007-1HZN-FRS, BP007-1HZC-FLS, BP007-1HZN-FLS Installation And Maintenance Manual

Installation and Maintenance Manual

CP/BP Series

6 720 220 045

Revised 05-12

©Copyright 2012 Bosch, Inc All rights reserved

Table of Contents

TABLE OF CONTENTS

CP/BP Series

3

Model Nomenclature ............................................. 3

Initial Inspection ................................................... 4

General Description .............................................. 4

Moving and Storage .............................................. 4

Safety Considerations ........................................... 4

Location ................................................................ 4

Installation ............................................................ 5

Mounting Vertical Units ......................................... 5

Mounting Horizontal Units .................................... 5

Condensate Drain ................................................. 6

Duct System .......................................................... 6

Electrical ............................................................... 7

Thermostat Connections ...................................... 8

Safety Devices and the UPM Controller ................. 8

Sequence Of Operation ...................................... 10

Unit Options........................................................ 10

Fluid Differential Pressure Switch ....................... 13

Earth Coupled Systems ....................................... 15

Unit Start-up ....................................................... 15

Heat Recovery Package ....................................... 15

Water Tank Preparation ....................................... 16

HR Water Piping ................................................. 16

Typical Connection Piping ................................... 16

Water Tank Rell ................................................. 17

Initial Start up ..................................................... 17

Maintenance ....................................................... 17

In-warranty Material Return ................................ 18

Unit Specications .............................................. 18

Physical Data ................................................ 18

Dimensions ................................................... 19

Fluid Pressure Drops ..................................... 20

Air Temperature Rise/Fall .............................. 21

Refrigerant Pressure Ranges ......................... 22

Blower Performance ..................................... 23

Water Piping ....................................................... 13

Well Water Systems ............................................. 13

Fresh Water Systems ........................................... 14

MODEL NOMENCLATURE

CP/BP 048 - 1 VT C - F L T

SERIES:
CP/BP

NOMINAL CAPACITY:
MBTUH

VOLTAGE DESIGNATION:
1- 208-230/1/60

CABINET CONFIGURATION:
VT - VERTICAL
HZ - HORIZONTAL

WATER TO REFRIGERANT HEAT EX:
C - COPPER
N - CUPRO-NICKEL

Typical Wiring Diagrams ...................................... 24

Unit Check-out Sheet .......................................... 28

Troubleshooting .................................................. 29

SUPPLY AIR LOCATION:

T - TOP (VT ONLY)

S - STRAIGHT THRU (HZ ONLY)

E - END BLOW (HZ ONLY)

RETURN AIR LOCATION:

L - LEFT

R - RIGHT

WATER CONNECTION LOCATION

F - FRONT

Revised 05-12 Subject to change without prior notice

6 720 220 045

Initial Inspection

4

CP/BP Series

INITIAL INSPECTION

Be certain to inspect all cartons or crates on each
unit as received at the job site before signing the
freight bill. Verify that all items have been received
and that there are no visible damages; note any
shortages or damages on all copies of the freight
bill. In the event of damage or shortage, remember

that the purchaser is responsible for  ling the

necessary claims with the carrier. Concealed
damages not discovered until after removing the
units from the packaging must be reported to the
carrier within 24 hours of receipt.

GENERAL DESCRIPTION

These Packaged System Heat Pumps provide the

best combination of performance and ef ciency

available. Safety devices are built into each unit to
provide the maximum system protection possible
when properly installed and maintained.

The CP/BP Water-to-Air Heat Pumps are
Underwriters Laboratories (UL) and (cUL) listed for
safety. The water-to-Air Heat Pumps are designed to

operate with entering  uid temperature between

25°F to 80°F in the heating mode and between 50°F

to 110°F in the cooling mode. Ef ciencies and
capacities will vary as entering  uid and return air

temperatures vary.

50°F Min. EWT for well water applications

suffi cient water fl ow to prevent freezing.
Antifreeze solution is required for all closed loop
applications where the fl uid temperature may drop
below 50°F. Cooling Tower/Boiler and Earth
Coupled (Geo Thermal) applications should have
suffi cient antifreeze solution to protect against
extreme conditions and equipment failure. Frozen
water coils are not covered under warranty.

This product should not be used for temporarily

heating/cooling during construction. Doing so
may affect the unit’s warranty.

MOVING AND STORAGE

If the equipment is not needed for immediate
installation upon its arrival at the job site, it should
be left in its shipping carton and stored in a clean,

dry area. Units must only be stored or moved in the
normal upright position as indicated by the “UP”
arrows on each carton at all times. If unit stacking is
required, stack units as follows: Vertical units less
than 6 tons, no more than two high; horizontal units
less than 6 tons, no more than three high. Do not
stack units larger than 6 tons.

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be
hazardous due to system pressure and electrical

components. Only trained and quali ed personnel

should install, repair, or service the equipment. Untrained
personnel can perform basic functions of maintenance

such as cleaning coils and replacing  lters.

Before performing service or maintenance
operations on the system, turn off main power to
the unit. Electrical shock could cause personal
injury or death.

When working on equipment, always observe
precautions described in the literature, tags, and
labels attached to the unit. Follow all safety codes.
Wear safety glasses and work gloves. Use a

quenching cloth for brazing, and place a  re

extinguisher close to the work area.

The blower motor should only be operated when a
duct is installed and secured to heat pump duct
collar in order to avoid possible injury.

LOCATION

Locate the unit in an indoor area that allows easy

removal of the  lter and access panels, and has

enough room for service personnel to perform

maintenance or repair. Provide suf cient room to
make  uid, electrical, and duct connection(s). If the
unit is located in a con ned space such as a closet,

provisions must be made for return air to freely
enter the space. On horizontal units, allow
adequate room below the unit for a condensate
drain trap and do not locate the unit above supply
piping. These units are not approved for outdoor
installation; therefore, they must be installed inside
the structure being conditioned.

Do not locate units in areas that are subject to
freezing.

6 720 220 045

Subject to change without prior notice Revised 05-12

VIBRATION

PAD

FULL SIZE

Installation

CP/BP Series

5

INSTALLATION

Remove shipping block under blower housing.

Loosen compressor mounting bolts.

The installer should comply with all local codes
and regulations which govern the installation of
this type of equipment. Local codes and
regulations take precedent over any
recommendations contained in these instructions.
In lieu of local codes, the equipment should be
installed in accordance with the recommendations
made by the National electric code, and in
accordance with the recommendations made by
the National Board of Fire Underwriters. All local
seismic codes for seismic restraint of equipment,
piping, and duct work shall be strictly adhered to.

MOUNTING VERTICAL UNITS

Vertical units up to six tons are available in left or

right air return con gurations. Vertical units should

be mounted level on a vibration absorbing pad
slightly larger than the base to minimize vibration
transmission to the building structure. It is not

necessary to anchor the unit to the  oor. (See

Figure #1).

MOUNTING HORIZONTAL UNITS

While horizontal units may be installed on any
level surface strong enough to hold their weight,
they are typically suspended above a ceiling by
threaded rods. The rods are usually attached to
the unit corners by hanger bracket kits (P/N
930-008). (See Figure #2). The rods must be
securely anchored to the ceiling. Refer to the
hanging bracket assembly and installation
instructions for details. Horizontal units installed
above the ceiling must conform to all local codes.
An auxiliary drain pan if required by code should
be at least four inches larger than the bottom of
the heat pump. Plumbing connected to the heat
pump must not come in direct contact with joists,
trusses, walls, etc.

If the unit is located in a con ned space such as a

closet, provisions must be made for return air to
freely enter the space.

VIBRATION

PAD

FULL SIZE

Figure #1 – Vertical unit on vibration pad

Figure #2 – Typical horizontal unit hanging bracket

Some applications require an attic  oor installa-

tion of the horizontal unit. In this case the unit
should be set in a full size secondary drain pan on
top of a vibration absorbing mesh. The secondary

drain pan prevents possible condensate over ow

or water leakage damage to the ceiling. The
secondary drain pan is usually placed on a ply­wood base isolated from the ceiling joists by
additional layers of vibration absorbing mesh. In
both cases, a 3/4” drain connected to this second­ary pan should be run to an eave and able to drain
to a location that will be noticeable. If the unit is
located in a crawl space, the bottom of the unit

must be at least 4” above grade to prevent  ood-

ing of the electrical parts due to heavy rains.

Locate the heat pump unit in an area that provides

suf cient room to make water and electrical

connections, allowing easy removal of the access

Revised 05-12 Subject to change without prior notice

6 720 220 045

6

Condensate Drain

CP/BP Series

panels, and replacement of air lters for routine

maintenance. This will ensure proper work space for
service personnel to perform maintenance or repair.

See Unit Specications for replacement lter sizes

in the back of this manual to ensure proper
clearances are provided during installation. Allow
adequate room below the unit for a condensate
drain trap on horizontal units.

Water freezes at 32°F. Frozen water coils are not
covered under the limited product warranty. It is
the installer’s responsibility to insure that the heat
pump unit is installed in a location or have taken
the proper precautions in order to prevent
rupturing the water coil due to freezing conditions.

The heat pump unit is designed for conditioned
space installation only. If the source water is
subjected to conditions where ambient
temperatures can fall below freezing, some form of
freeze protection should be employed. In an open
loop system this may entail running the water pump
continuously to prevent freezing. An antifreeze
solution wherever possible should be used if water
will be subject to freezing. Consult the factory in
these instances for guidance.

CONDENSATE DRAIN

A drain line must be connected to the heat pump
and pitched away from the unit a minimum of 1/8”

per foot to allow the condensate to ow away from

the unit.

Figure #3 – Heat Pump Condensate Trapping

(Heat Pumps are not internally trapped). A vertical
air vent is sometimes required to avoid air pockets
(See Figure #3). The length of the trap depends on
the amount of positive or negative pressure on the
drain pan. A second trap must not be included.

The horizontal unit should be pitched
approximately 1/4” towards the drain in both
directions, to facilitate condensate removal. See
Figure 4 below.

Figure #4 – Sloped horizontal unit installation

DUCT SYSTEM

A supply air outlet collar and return air duct ange

are provided on all units to facilitate duct

connections. See Unit Specications for duct collar

connection sizes in the back of this manual.

A exible connector is recommended for supply

and return air duct connections on metal duct
systems. All metal ducting should be insulated with
a minimum of one inch duct insulation to avoid heat
loss or gain and prevent condensate forming during
the cooling operation. Application of the unit to
uninsulated duct work is not recommended as the
unit’s performance will be adversely affected. Do
not connect ducts directly to the blower outlet;
factory supplied duct collars should be used for

connection. The factory provided air lter must be
removed when using a lter back return air grill. The
factory lter should be left in place on a free return

system.

This connection must be in conformance with local
plumbing codes. A trap must be installed in the

condensate line to insure free condensate ow.

6 720 220 045

If the unit will be installed in a new installation
which includes new duct work, the installation
should be designed using current ASHRAE
procedures for duct sizing. If the unit is to be
connected to existing ductwork, a check should be
made to assure that the duct system has the

Subject to change without prior notice Revised 05-12

Electrical

CP/BP Series

7

capacity to handle the air required for the unit
application. If the duct system is too small, larger
ductwork should be installed. Check for existing
leaks and repair as necessary to ensure a tight air
seal within duct. The duct system and all diffusers

should be sized to handle the designed air ow

quietly. To maximize sound attenuation of the unit
blower, the supply and return air plenums should
be insulated. There should be no direct straight air
path thru the return air grille into the heat pump.
The return air inlet to the heat pump must have at
least one 90 degree turn away from the space

return air grille. If air noise or excessive air ow are

a problem, the blower speed can be changed to a

lower speed to reduce air ow. (Refer to ECM

motor speeds and settings in Table #1)

Always disconnect power to the unit before
changing motor speed to prevent damage to
the motor, injury or death due to electrical

shock.

ELECTRICAL

Always disconnect power to the unit before
servicing to prevent injury or death due to
electrical shock or contact with moving parts.

All eld wiring must comply with local and national
re, safety and electrical codes. Power to the unit

must be within the operating voltage range
indicated on the unit’s nameplate. On three phase
units, phases must be balanced within 2%.

Operating the unit with improper line voltage
or with excessive phase imbalance is
hazardous to the unit and constitutes abuse
and is not covered under warranty.

Properly sized fuses or HACR circuit breakers must
be installed for branch circuit protection. See
equipment rating plates for proper size.

The heat pump units are provided with a concentric
knock-out in the front right corner post for
attaching common trade sizes of conduit. Route
power supply wiring through this opening. Flexible
wiring and conduit should be used to isolate
vibration and noise from the building structure. Be
certain to connect the ground lead to the ground
lug in the control box. Connect the power leads as
indicated on the unit wiring diagrams.

Table 1: CP/BP Motor CFM Selection (ECM Motor)otor Only)

Units

CP/BP015 450-153 1/3 LOW MED HIGH - -

CP/BP018 450-153 1/3 - LOW - MED HIGH

CP/BP024 450-157 1/3 LOW MED HIGH - -

CP/BP030 450-154 1/3 LOW MED HIGH - -

CP/BP036 450-158 3/4 LOW MED HIGH - -

CP/BP042 450-155 3/4 LOW MED HIGH - -

CP/BP048 450-155 3/4 - LOW MED HIGH -

CP/BP060 450-156 1 LOW MED HIGH - -

CP/BP070 450-156 1 LOW - - MED HIGH

Revised 05-12 Subject to change without prior notice

Motor Part

Number

Motor HP Tap1 Tap2 Tap3 Tap4 Tap5

6 720 220 045

8

Thermostat Connections

CP/BP Series

THERMOSTAT CONNECTIONS

Thermostat wiring is connected to a 7 position low
voltage terminal block in the electrical box. The
thermostat connections and their functions are as
follows:

Y Compressor Operation

G Fan

O Reversing Valve (energized in cooling)

C Transformer 24 VAC Common – 3 Connections

R Transformer 24 VAC Hot

If the unit is being connected to a thermostat with a
malfunction light, this connection is made at the
unit alarm output.

If the thermostat is provided with a malfunction

light powered off of the common (C) side of the
transformer, a jumper between “R” and “COM”

terminal of “ALR” contacts must be made.

below or remains at freeze limit trip for 30
seconds, the controller will shut down the
compressor and enter into a soft lockout
condition. The default freeze limit trip is 30°F,
however this can be changed to 15°F by cutting
the R42 resistor located on top of DIP switch SW1.

• The optional condensate over ow protection

sensor (standard on horizontal units) is located in
the drain pan of the unit and connected to the
‘COND’ terminal on the UPM board.

If the thermostat is provided with a malfunction

light powered off of the hot (R) side of the
transformer, then the thermostat malfunction light
connection should be connected directly to the

(ALR) contact on the unit’s UPM board.

SAFETY DEVICES AND THE
UPM CONTROLLER

Each unit is factory provided with a Unit Protection
Module (UPM) that controls the compressor opera­tion and monitors the safety controls that protect
the unit.

Safety controls include the following:

• High pressure switch located in the refrigerant

discharge line and wired across the HPC
terminals on the UPM

• Low pressure switch located in the unit

refrigerant suction line and wired across
terminals LPC1 and LPC2 on the UPM.

Freeze
Protection
Sensor

• Optional freeze protection sensor, mounted close

to condensing water coil, monitors refrigerant
temperature between condensing water coil and
thermal expansion valve. If temperature drops

6 720 220 045

If freeze protection sensor is not installed, a

jumper between freeze contacts must be installed

on the UPM board otherwise unit will not start.

Subject to change without prior notice Revised 05-12

Safety Devices and the UPM Controller

CP/BP Series

9

The UPM includes the following features:

• ANTI-SHORT CYCLE TIME—5 minute delay on
break timer to prevent compressor short cycling.

• RANDOM START—Each controller has a unique
random start delay ranging from 270 to 300 seconds to
reduce the chances of multiple units simultaneously
starting after initial power up or after a power
interruption, creating a large electrical spike.

• LOW PRESSURE BYPASS TIMER—If the compressor is
running and the low pressure switch opens, then the
control will keep the compressor on for 120 seconds.
After 2 minutes if the low pressure switch remains
open, the control will shut down the compressor and
enter a soft lockout. The compressor will not be
energized until the low pressure switch closes and the
anti-short cycle time delay expires. If the low pressure
switch opens 2–4 times in 1 hour, the unit will enter a
hard lock out and need to be reset.

• BROWNOUT/SURGE/POWER INTERRUPTION
PROTECTION—The brownout protection in the UPM

board will shut down the compressor if the
incoming power falls below 18 VAC. The compressor
will remain off till the voltage goes above 18 VAC and
the anti short cycle timer (300 seconds) times out.
The unit will not go into a hard lockout.

• MALFUNCTION OUTPUT—Alarm output is Normally
Open (NO) dry contact. If 24 VAC output is needed
R must be wired to the ALR-COM terminal; 24VAC
will be available on the ALR-OUT terminal when the
unit is in alarm condition. If pulse is selected the
alarm output will be pulsed. The fault output will
depend on the dip switch setting for “ALARM”. If it
set to “CONST’, a constant signal will be produced
to indicate a fault has occurred and the unit
requires inspection to determine the type of fault. If
it is set to “PULSE”, a pulse signal is produced and a
fault code is detected by a remote device indicating
the fault. See L.E.D. Fault Indication below for blink
code explanations. The remote device must have a
malfunction detection capability when the UPM
board is set to “PULSE”.

• TEST DIP SWITCH—A test dip switch is provided
to reduce all time delay settings to 10 seconds

during troubleshooting or veri cation of unit

operation. Note that operation of the unit while in
test mode can lead to accelerated wear and

premature failure of the unit. The “TEST” switch
must be set back to “NO” for normal operation.

• FREEZE SENSOR—The freeze sensor input is
active all the time, if a freeze option is not selected
the freeze terminals will need a jumper. There are

2 con gurable freeze points, 30°F & 15°F. The unit

will enter a soft lock out until the temperature
climbs above the set point and the anti-short cycle
time delay has expired. The freeze sensor will shut
the compressor output down after 90 seconds of

water  ow loss and report a freeze condition. It is
recommended to have a  ow switch to prevent the
unit from running if water  ow is lost.

If unit is employing a fresh water system (no

anti-freeze protection), it is extremely important to
have the “Freeze” jumper R42 resistor set to 30°F
in order to shut down the unit at the appropriate
leaving water temperature and protect your heat
pump from freezing if a freeze sensor is included.

• L.E.D. FAULT INDICATION—Two L.E.D. indicators
are provided:

• Green: Power L.E.D. indicates 18—30 VAC

present at the board.

• Red: Fault indicator with blink codes as follows:

- One blink—High pressure lockout

- Two blinks—Low pressure lockout

- Three blinks—Freeze sensor lockout

- Four blinks—Condensate over ow

- Five blinks—Brownout

• INTELLIGENT RESET—If a fault condition is initiated,
the 5 minute delay on break time period is initiated
and the unit will restart after these delays expire.
During this period the fault LED will indicate the
cause of the fault. If the fault condition still exists or
occurs 2 or 4 times (depending on 2 or 4 setting for
Lockout dip switch) before 60 minutes, the unit will
go into a hard lockout and requires a manual lockout

reset. A single condensate over ow fault will cause

the unit to go into a hard lockout immediately, and
will require a manual lockout reset.

Revised 05-12 Subject to change without prior notice

6 720 220 045

10

CP/BP Series

Sequence of Operation

• LOCKOUT RESET—A hard lockout can be reset by
turning the unit thermostat off and then back on
when the “RESET” dip switch is set to “Y” or by
shutting off unit power at the circuit breaker
when the “RESET” dip switch is set to “R”.

The blower motor will remain active during a

lockout condition.

• UPM BOARD DEFAULT SETTINGS—Your UPM
board will come from the factory with the
following default settings:

• Freeze—“Terminals not jumped” on all the time

• Temp—30°F

• Lockout—2

• Reset—“Y”

• Alarm—“PULSE”

• Test—“NO”

• Dry Contact—“Normally Open (NO)”

Considerations

1. Always check incoming line voltage power

supply and secondary control voltage for
adequacy. Transformer primaries are dual
tapped for 208 and 230 volts. Connect the
appropriate tap to ensure a minimum of 18 volts
secondary control voltage. 24 volts is ideal for
best operation.

SEQUENCE OF OPERATION

Cooling Mode

See Typical Wiring Diagrams at the end of the
document. Energizing the “O” terminal energizes
the unit reversing valve in the cooling mode. The fan
motor starts when the “G” terminal is energized.

When the thermostat calls for cooling (Y), the loop
pump or solenoid valve if present is energized and
compressor will start.

Once the thermostat is satis ed, the compressor

shuts down accordingly and the fan ramps down to
either fan only mode or off over a span of 30 seconds
(ECM Motors).

Note that a fault condition initiating a lockout will
de-energize the compressor.

Heating Mode

Heating operates in the same manner as cooling,
but with the reversing valve de-energized. The
compressor will run until the desired setpoint
temperature on the thermostat is achieved.

Once the thermostat is satis ed, the compressor

shuts down and the fan ramps down in either fan
only mode or turns off over a span of 30 seconds.
Auxiliary electric heating coils are not available on
the BP/CP product line.

UNIT OPTIONS
HOT GAS REHEAT (HGR)

2. Long length thermostat and control wiring

leads may create voltage drop. Increase wire
gauge or up-size transformers may be required
to insure minimum secondary voltage supply.

3. FHP recommends the following guidelines for

wiring between a thermostat and the unit: 18
GA up to 60 foot, 16 GA up to 100 ft and 14 GA
up to 140 ft.

4. Do not apply additional controlled devices to

the control circuit power supply without
consulting the factory. Doing so may void
equipment warranties.

5. Check with all code authorities on requirements

involving condensate disposal/over  ow

protection criteria.

6 720 220 045

Hot gas reheat allows the user to not only control
space temperature, but also humidity levels within
the conditioned space. An excess of moisture in the
space can allow mold growth leading to damage in
the structure or interior surfaces as well as
reducing the air quality and creating an unhealthy
environment.

The typical control of a unit is by a thermostat that
senses the temperature in the space. By utilizing a
humidistat in addition to the thermostat we are
able to monitor the humidity levels in the space as
well. The HGR option allows cooling and

dehumidi cation to satisfy both the thermostat and

humidistat.

Subject to change without prior notice Revised 05-12

Sequence of Operation

UPM Sequence of Operation (SOO) Flow Chart

Y1=1

NO

YES

Power/Switchs/Sensor

Status Check

>

V

18VAC

YES

HPC = 1

NO

NO

Blink Code On Status LED

Soft Lockout

Record Alarm

Start Counter (If Applicable)

CP/BP Series

Lockout Can Be Set To

4 Via Dip Switch

COUNT = 2

NO

11

YES

LPC = 1

YES

FRZ

TEMP

>

LIM

YES

CON

>

YES

INITIAL

POWER UP

YES

YES

YES

NO

Start Timer

TIME

SEC

>

120

NO

YES

NO

Start Timer

TIME

SEC

>

30

CC Output = Off

NO

Blink Code On Status LED

Report Alarm Fault

0

NO

Start

Anti Short Cycle

NO

Hard Lockout

ALR Output = On/Pulse

NO

YES

CC Output = On

Start

Random Start Up

T

>

RS SEC

ASC OR

Revised 05-12 Subject to change without prior notice

6 720 220 045

12

CP/BP Series

Sequence of Operation

Once the thermostat reaches set point
temperature and the humidity is above set point
the unit will operate in the hot gas reheat mode

rst by cooling and dehumidifying then reheating

the air using hot refrigerant gas before delivering it
to the space usually 2°F to 5°F below room
temperature. The unit is operating as a

dehumidier. By reheating the air along a constant

sensible heat line the relative humidity of the
supply air is reduced.

The moisture removal capacity of a specic heat

pump is determined by the unit latent capacity
rating. A heat pump’s latent capacity can be

determined by reviewing the heat pump specication

data sheets. Depending upon the entering water and
air conditions a total and sensible capacity can be
interpolated from the data sheets. Subtracting
sensible capacity from total capacity yields latent
capacity. Dividing the latent capacity by 1069 (BTU/
LB of water vapor at 80° DB and 67° WB) yields the
amount of moisture removal in pounds per hour.

Sequence of Operation - On/Off
Control

The sequence of operation in the cooling and
heating mode is the same as a regular heat pump.

In the reheat mode on a call from the humidistat the
reheat relay coil is energized through the “H” circuit.
The blower relay, reversing valve and compressor
contactor are energized through the contacts of the
reheat relay. See typical wiring diagrams at the end
of the manual. The cooling relay remains de­energized enabling the reheat solenoid (Note: The
reheat mode always operates in the cooling mode.)
Should the temperature in the space increase above
set point the compressor terminal Y is energized
which will de-energize the reheat valve putting the
unit into the straight cooling mode. A call for cooling
or heating will always take precedence over hot gas
reheat.

Hot Gas Reheat Controllers

There are several ways to control heat pumps with hot
gas reheat. You should choose the means that best

suits your specic application. See typical wiring

diagrams and the end of the manual for some possible
control sequences. Most heat pump compatible

thermostats in conjunction with a humidistat are
acceptable for use, (Note: “O” output for reversing
valve energized in cooling mode is required.)
Combination thermostats/humidistat are also
available.

Special Considerations

Some applications require special consideration to
maximize the performance of the hot gas reheat
function:

• Low Temperature Well Water

• Indoor Pool Dehumidifying During Winter Months

Consult the factory for special application
considerations.

Low Temperature Well Water

When low temperature well water is utilized as the
water source (below 55°F), a means of establishing two

ow rates, one for the cooling/reheat mode and one for

heating mode is recommended. In the cooling mode at

low entering water temperatures and standard ow

rates discharge pressures and corresponding discharge
gas temperatures are relatively low. At these conditions
when the reheat mode is initiated the low temperature
discharge gas can reduce reheat capacity. A means to

reduce the water ow rate and elevate the discharge

pressure/ temperature in cooling/reheat mode should
be provided. Conversely, at low entering water
temperatures in the heating mode system suction
pressure is reduced causing a loss in heating capacity. A

means of providing higher ow in the heating mode

should be provided. The simplest way to accomplish the
above is to install water regulating valves.

Indoor Pool Dehumidifying During
Winter Months

It is important to remember that when in the reheat
mode the heat pump is cooling and reheating. A
secondary means of heating the space during the

dehumidication mode should be provided. The

indoor space temperature should be kept at least
2°F above the pool water temperature. If this is not
done the warm pool water attempts to heat the
space and the humidity levels increase
exponentially. The heat pump is normally sized to
handle the design latent load moisture removal. A

6 720 220 045

Subject to change without prior notice Revised 05-12

Fluid Differential Pressure Switch

CP/BP Series

13

second heat pump or resistance heat should be
provided to handle the structural loss load.

A protective coating is highly recommended for all

pool applications due to the highly corrosive
chemical environment.

FLUID DIFFERENTIAL PRESSURE
SWITCH (DPS)

The function of the differential switch is to prevent
or stop compressor operation should the water
supply fail. This will prevent the unit from locking
out on a safety requiring manual reset to restart.

The switch is piped between the water entering and
leaving connections. Should the pressure drop fall
below set value the switch will open de-energizing
the DPS relay thereby stopping the compressor.

The controller has an adjustment to change the
minimum pressure differential required to open the

switch and may require  eld adjustment.

The blower operation will not be affected by this
option.

The start-up process should include checking the

operation of the switch when installed. This
should be done after the system is balanced.
Adjustment should be made if necessary.

Operating Pressures and Temperatures

Operating pressures and temperatures in the reheat
mode vary slightly from standard cooling mode operat­ing characteristics. The variations are as follows:

Discharge Pressure: (-) 5 to 20 PSIG

Discharge Gas Temperature: (-) 5°F to 15°F

Suction Pressure: (+) 5 to 10 PSIG

Suction Gas Temperature: (+) 5°F to 10°F

WATER PIPING

Water piping exposed to extreme low ambient
temperatures are subject to freezing.
Remember water freezes at 32°F.

Supply and return piping must be as large as the
water connections on the heat pump (larger on long

runs). Never use  exible hoses of a smaller inside

diameter than that of the water connections on the
unit. The heat pump units are supplied with either a
copper or optional cupro-nickel condenser.

Galvanized pipe or fi ttings are not
recommended for use with these units due to
the possible galvanic corrosion.

Both the supply and discharge water lines will sweat if
subject to low water temperature. These lines should
be insulated to prevent damage from condensation.

All manual  ow valves used in the system must be

ball valves. Globe and gate valves must not be used
due to high pressure drop and poor throttling
characteristics.

Never exceed the recommended water  ow rates.

Serious damage or erosion of the water to
refrigerant heat exchanger could occur.

Improper heat exchanger water fl ow due to
piping, valve arrangement or improper pump
operation is hazardous to the unit and
constitutes abuse which will void the heat
exchanger and compressor warranty.

All heat pump units are equipped with female pipe

thread  ttings. Consult the speci cation sheets for
sizes. Te on tape sealer should be used when

connecting water piping connections to the units to
ensure against leaks and possible heat exchanger
fouling. Do not over tighten the connections. Flexible
hoses should be used between the unit and the rigid
system to avoid possible vibration. Ball valves should
be installed in the supply and return lines for unit

isolation and unit water  ow balancing.

No unit should be connected to the supply or return
piping until the water system has been completely

cleaned and  ushed to remove any dirt, piping

chips or other foreign material. Supply and return
hoses should be connected together during this
process to ensure the entire system is properly

 ushed. After the cleaning and  ushing has taken

place the unit may be connected to the water loop
and should have all valves wide open.

WELL WATER SYSTEMS

Copper is adequate for ground water that is not high
in mineral content. Should your well driller express

Revised 05-12 Subject to change without prior notice

6 720 220 045

14

CP/BP Series

Fresh Water Systems

concern regarding the quality of the well water
available or should any known hazards exist in your
area, we recommend proper testing to assure the
well water quality is suitable for use with water
source equipment. In conditions anticipating
moderate scale formation or in brackish water, a
cupro-nickel heat exchanger is recommended. In
well water applications water pressure must always
be maintained in the heat exchanger. This can be
accomplished with either control valve or a bladder
type expansion tank.

When well water is used exclusively for supplying water
to the heat pump, the pump should operate only when
the heat pump operates. A 24 volt double pole-single
throw (DP/ST) contactor (Figure #6) can be used to
operate the well pump with the heat pump.

POWER SUPPLY

C Y1

Y1

UNIT

TERMINAL

STRIP

(24VAC)

DP/ST RELAY

Figure #7

Pressure/temperature ports are recommended in

both the supply and return lines for system ow
balancing. The water ow can be accurately set by

measuring the water-to-refrigerant heat exchangers

water side pressure drop. See the unit specication
sheets for the water ow and pressure drop

information in the back of this manual.

The discharge water from the heat pump is not
contaminated in any manner and can be disposed
of in various ways depending on local codes (i.e.

discharge well, dry well, storm sewer, drain eld,

stream, pond, etc.)

When using a single water well to supply both
domestic water and the heat pump care must be taken

to insure that the well can provide sufcient ow for

both. In well water applications a slow closing
solenoid valve must be used to prevent water hammer.

Solenoid valves should be connected across Y and
C on the interface board for all. Make sure that the
VA draw of the valve does not exceed the contact
rating of the thermostat.

FRESH WATER SYSTEMS

POWER TO PUMP

Figure #6

When two or more units are supplied from one well,
the pump can be wired (Figure #7) to operate
independently from either unit. An upsized VA
transformer may be required in either case.

POWER SUPPLY

Y1

C

UNIT

TERMINAL

STRIP

(24VAC)

Y1

C

2 DP/ST
RELAYS

POWER

TO PUMP

The Units shall be designed to operate throughout the

range of entering uid temperature of 50°F to 110°F in

the cooling mode and 50°F to 80°F in the heating
mode. Units shall have an operating range of 25 °F to
80°F in the heating mode when equipped with the
optional extended range. In the cooling mode, heat is
rejected from the Bosch unit into the water loop. A
cooling tower provides evaporative cooling to the loop
water thus maintaining a constant supply temperature
to the unit. When utilizing open cooling towers,
chemical water treatment is mandatory to ensure the
water is free from corrosive elements.

A secondary heat exchanger (plate frame) between
the unit and the open cooling tower may also be
used. It is imperative that all air be eliminated from
the closed loop side of the heat exchanger to insure
against fouling.

In the heating mode, heat is absorbed from the
water loop. A boiler can be utilized to maintain the
loop at the desired temperature.

6 720 220 045

Subject to change without prior notice Revised 05-12

UEarth Coupled System

CP/BP Series

15

Water piping exposed to extreme low ambient
temperatures is subject to freezing.

Pressure/temperature ports are recommended in both

supply and return lines for system ow balancing. Water
ow can be accurately set by measuring the water-to-

refrigerant heat exchangers water side pressure drop.

See specication sheets for water ow vs. pressure

drop information in the back of this manual.

EARTH COUPLED SYSTEMS

Closed loop and pond applications require
specialized design knowledge. No attempt at these
installations should be made unless the dealer has
received specialized training. Utilizing Bosch’s
Ground Loop Pumping Package (GLP), makes the
installation easy. Anti-freeze solutions are utilized
when low operating conditions are expected to
occur. Refer to the GLP installation manuals for

more specic instructions. A wrapped water coil

option is required for this application.

• Verify that duct work has been properly fastened

to supply and return duct collars

• Make sure return air lters are positioned correctly
in the lter rack if removed during installation

UNIT START-UP

1. Set the thermostat to the highest setting.

2. Set the thermostat system switch to “COOL”,

and the fan switch to the “AUTO” position. The
reversing valve solenoid should energize. The
compressor and fan should not run.

3. Reduce the thermostat setting approximately 5

degrees below the room temperature.

4. Verify the heat pump is operating in the cooling

mode.

5. Turn the thermostat system switch to the “OFF”

position. The unit should stop running and the
reversing valve should de-energized

6. Leave the unit off for approximately (5) minutes

to allow for system equalization.

System Checkout

After completing the installation, and before
energizing the unit, the following system checks
should be made prior to initial startup:

• Verify that the supply voltage to the heat pump is

in accordance with the nameplate ratings

• Make sure that all electrical connections are tight

and secure

• Check the electrical fusing and wiring for the

correct size

• Verify that the low voltage wiring between the

thermostat and the unit is correct

• Verify that the water piping is complete and correct

• Check that the water ow is correct, and adjust if

necessary

• Check the blower for free rotation, and that it is

secured to the shaft

• Verify that vibration isolation has been provided

• Unit is serviceable. Be certain that all access

panels are secured in place

• Verify that the blower support has been removed

7. Turn the thermostat to the lowest setting. The

compressor and fan should not run.

8. Set the thermostat switch to “HEAT”.

9. Increase the thermostat setting approximately

5 degrees above the room temperature.

10. Verify the heat pump is operating in the

heating mode.

11. Set the thermostat to maintain the desired

space temperature.

12. Check for vibrations, leaks, etc...

13. Instruct the owner on the unit and thermostat

operation

HEAT RECOVERY PACKAGE

The Heat Recovery package is a factory mounted
option. It consists of a forced pumped unit that
employs a circulating pump to move water through a
double wall/vented heat exchanger and returns the
heated water to the water tank. The water is heated by
superheated refrigerant discharge gas from the
compressor. This waste heat of the cooling mode
captured by the heat recovery increases the capacity

and efciency of the heat pump unit. If the air

temperature is uncomfortable coming from the air

Revised 05-12 Subject to change without prior notice

6 720 220 045

16

CP/BP Series

Water Tank Preparation

vents in the heating mode the heat recovery may need
to be turned off. In the heating mode the heat recovery
captures heat that would normally be used for space
heating.

If heat recovery unit is installed in an area
where freezing may occur, the unit must be
drained during winter months to prevent heat
exchanger damage. Heat exchanger ruptures
that occur due to freezing will void the heat
recovery package warranty along with the heat
pump warranty.

WATER TANK PREPARATION

1. Turn off electrical or fuel supply to the water heater.

2. Attach garden hose to water tank drain connection
and run other end of hose out doors or to an open
drain.

3. Close cold water inlet valve to water heater tank.

4. Drain tank by opening drain valve on the bottom
of the tank, then open pressure relief valve or
hot water faucet.

5. Once drained the tank should be ushed with

cold water until the water leaving the drain hose
is clear and free of sediment.

6. Close all valves and remove the drain hose.

7. Install HR water piping.

HR WATER PIPING

All hot water piping should be a minimum of 3/8t

O.D. copper tube to a maximum distance of fteen
(15) feet. For distances beyond fteen feet but not

exceeding sixty (60) feet use 1/2” copper tube.
Separately insulate all exposed surface of both
connecting water lines with 3/8” wall closed cell
insulation. Install isolation valves on supply and
return to the heat recovery. (Figure #8)

TYPICAL CONNECTION PIPING

6 720 220 045

Figure 8

Subject to change without prior notice Revised 05-12

MaWater Tank Rell

CP/BP Series

17

WATER TANK REFILL

1. Open the cold water supply to the tank.

2. Open a hot water faucet to vent air from the system

until water ows from the faucet, then close.

3. Depress the hot water tank pressure relief valve
handle to ensure there is no air remaining in the tank.

4. Carefully inspect all plumbing for water leaks.
Correct as required.

5. Purge all air from HR by depressing the schrader
valve on the HR Unit. Allow all air to bleed out
until water appears at the valve.

6. Before restoring the power or fuel supply to the
water heater, adjust the temperature setting on the
tank thermostat(s) to ensure maximum utilization
of the heat available from the refrigeration system
and conserve the most energy. On tanks with both
upper and lower elements and thermostats, the
lower element should be turned down to 100° F,
while the upper element should be adjusted to

120° F. Depending upon the specic needs of the

customer, you may need to adjust the upper
element differently. On tanks with a single
thermostat lower the thermostat setting to 120° F
or the “LOW” position.

7. After thermostat adjustments are completed,
replace access cover and restore electrical or
fuel supply to water heater.

INITIAL START-UP:

1. Make sure all valves in heat recovery water
piping system are open. NEVER OPERATE HR
PUMP DRY.

2. Turn on the heat pump. The HR pump should
not run if the compressor is not running.

3. Turn HR switch to the “ON” position. The pump
will operate if entering water temperature to HR
is below 120° F.

4. The temperature difference between the water
entering and leaving the heat recovery should
be 5° to 15° F.

MAINTENANCE

1. Filter changes or cleanings are required at

regular intervals. The time period between lter

changes will depend upon type of environment
the equipment is used in. In a single family
home, that is not under construction, changing

or cleaning the lter every 60 days may be
sufcient. In other applications such as motels,

where daily vacuuming produces a large

amount of lint, lter changes may be need to be
as frequent as biweekly. See unit specications
for replacement lter sizes. Note that horizontal
units containing two lters are taped together

at the factory to facilitate removal. This should

be done by end user as new lters are installed.

Operating the unit with improper line voltage
or with excessive phase imbalance is
hazardous to the unit and constitutes abuse
and is not covered under warranty.

2. An annual “checkup” is recommended by a
licensed refrigeration mechanic. Recording the
performance measurements of volts, amps, and
water temperature differences (both heating
and cooling) is recommended. This data should
be compared to the information on the unit’s
data plate and the data taken at the original
startup of the equipment.

3. The condensate drain should be checked

annually by cleaning and ushing to insure

proper drainage.

4. Periodic lockouts almost always are caused by

air or water ow problems. The lockout

(shutdown) of the unit is a normal protective
measure in the design of the equipment. If
continual lockouts occur, call a mechanic
immediately and have them check for: water

ow problems, water temperature problems, air
ow problems or air temperature problems.

Use of the pressure and temperature charts for
the unit may be required to properly determine
the cause.

5. Allow the unit to operate for 20 to 30 minutes to
ensure it is functioning properly. The pump
should shut off when the water temperature
entering the heat recovery reaches 120°F.

Revised 05-12 Subject to change without prior notice

6 720 220 045

18

CP/BP Series

In-Warranty Material Return

IN-WARRANTY MATERIAL RETURN

When contacting your Representative for service or
replacement parts, refer to the model and serial
number of the unit as stamped on the data plate
attached to the unit.

Material may be returned to the factory only with
permission of an authorized factory representative. A
“Warranty Return Material” tag must be attached to
the returned material. Assure that all of the information

as called for on the tag is  lled out completely and

accurately to expedite handling and insure prompt
issuance of credits.

UNIT SPECIFICATIONS

Freight charges for all items returned to the factory
shall be prepaid. The return of the part does not
constitute an order for a replacement. Therefore, a
purchase order must be entered through your nearest
representative. The order shall include the part
number, model number, and serial number of the unit
involved. If the part is within the warranty period, and
after our inspection of the returned part proves that
the failure is due to faulty material or workmanship a
credit or replacement part will be issued.

Parts returned without a completed “Warranty

Return Material” tag will not be credited.

Table 4: Physical Data

Model

BP007

BP009

BP012

BP015

BP018

CP/BP024

CP/BP030

CP/BP036

CP/BP042

CP/BP048

CP/BP060

CP/BP070

Clearance

Front

(in.)

36 0.46 140 / 165 160 / 185

36 0.46 154 / 172 174 / 192

36 0.66 166 / 173 186 / 205

36 0.66 191 / 190 208 / 218

36 0.66 195 / 198 212 / 222

36 0.81 229 / 307 242 / 340

36 1.14 269 / 358 292 / 404

36 1.14 281 / 369 304 / 415

36 1.11 334 / 400 360 / 465

36 1.11 340 /405 366 / 470

36 1.13 396 / 452 422 / 520

36 2.27 444 / 494 470 / 562

Water Coil

Volume

(gals.)

Installation Weight

(Vertical / Horizontal)

(lbs.)

Shipping Weight

(Vertical / Horizontal)

(lbs.)

6 720 220 045

Subject to change without prior notice Revised 05-12

Unit Specications

Table 2: Dimensions

CP/BP Series

19

Vertical

Model

Width Depth Height Width Depth Height Width Height Width Height

BP007 21.50 21.50 32.75 21.50 43.00 17.00 11.75 7.75

BP009 21.50 21.50 32.75 21.50 43.00 17.00 11.75 7.75

BP012 21.50 21.50 32.75 22.00 45.00 19.50 7.75

BP015 21.50 21.50 39.50 22.00 45.00 19.50 13.75 13.75 18.0

BP018 21.50 21.50 39.50 22.00 45.00 19.50 13.75 13.75 18.0

BP024 21.50 26.25 47.50 26.00 54.50 22.00 13.75 15.75

BP030 24.25 33.50 47.50 30.00 68.00 22.00 15.75 15.75

BP036 24.25 33.50 47.50 30.00 68.00 22.00 15.75 15.75

BP042 26.00 33.50 58.50 30.00 79.00 22.00 17.75 17.75

Unit

(In)

Horizontal

Unit

(In)

Supply Air

Connection

(In)

H: 7.75

V: 11.75

Return Air

Connection*

H: 18.0
V: 17.5

H: 18.0
V: 17.5

H: 18.0
V: 17.5

H: 30.0
V: 22.0

H: 34.0
V: 28.0

H: 34.0
V: 28.0

H: 46.5
V: 28.0

(In)

14.0

14.0

14.0

H: 16.0
V: 18.0

H: 16.0
V: 18.0

H: 18.5
V: 22.0

H: 18.5
V: 22.0

H: 18.5
V: 22.0

H: 18.5
V: 30.0

Replacement Fil-

ter Nominal Size*

(In)

H: 15"x20"x1" (1)
V: 15"x20"x1" (1)

H: 15"x20”x1” (1)
V: 15"x20”x1” (1)

H: 18"x20”x1” (1)

V: 18”x20”x1” (1)

H: 18"x20”x1” (1)
V: 20"x20”x1” (1)

H: 18"x20"x1" (1)
V: 20"x20"x1" (1)

H: 20”x30”x1” (1)

V: 24"x24"x1” (1)

H: 18"x20"x1" (2)
V: 24"x30"x1" (1)

H: 18"x20"x1" (2)
V: 24"x30"x1" (1)

H: 24"x20"x1" (2)
V: 16"x30"x1" (2)

BP048 26.00 33.50 58.50 30.00 79.00 22.00 17.75 17.75

BP060 26.00 33.50 66.50 30.00 89.00 22.00 17.75 17.75

BP070 26.00 33.50 66.50 30.00 89.00 22.00 17.75 17.75

CP024 21.50 26.25 47.50 26.00 54.50 22.00 13.75 15.75

CP030 24.25 33.50 47.50 30.00 68.00 22.00 15.75 15.75

CP036 24.25 33.50 47.50 30.00 68.00 22.00 15.75 15.75

CP042 26.00 33.50 58.50 30.00 79.00 22.00 17.75 17.75

CP048 26.00 33.50 58.50 30.00 79.00 22.00 17.75 17.75

CP060 26.00 33.50 66.50 30.00 89.00 22.00 17.75 17.75

CP070 26.00 33.50 66.50 30.00 89.00 22.00 17.75 17.75

* H = Horizontal Unit; V = Vertical Unit

H: 46.5
V: 28.0

H: 54.0
V: 28.0

H: 54.0
V: 28.0

H: 30.0
V: 22.0

H: 34.0
V: 28.0

H: 34.0
V: 28.0

H: 46.5
V: 28.0

H: 46.5
V: 28.0

H: 54.0
V: 28.0

H: 54.0
V: 28.0

H: 18.5
V: 30.0

H: 18.5
V: 38.0

H: 18.5
V: 38.0

H: 18.5
V: 22.0

H: 18.5
V: 22.0

H: 18.5
V: 22.0

H: 18.5
V: 30.0

H: 18.5
V: 30.0

H: 18.5
V: 38.0

H: 18.5
V: 38.0

H: 24"x20"x1" (1)
V: 16"x30"x1" (1)

H: 28"x20"x1" (2)
V: 20"x30"x1" (2)

H: 28"x20"x1" (2)
V: 20"x30"x1" (2)

H: 20”x30”x2” (1)

V: 24"x24"x2” (1)

H: 18"x20"x2" (2)
V: 24"x30"x2" (1)

H: 18"x20"x2" (2)
V: 24"x30"x2" (1)

H: 24"x20"x2" (2)
V: 16"x30"x2" (2)

H: 24"x20"x2" (2)

V: 16"x30"x2" (2)

H: 28"x20"x2" (2)

V: 20"x30"x2" (2)

H: 28"x20"x2" (2)

V: 20"x30"x2" (2)

Revised 05-12 Subject to change without prior notice

6 720 220 045

20

CP/BP Series

Unit Specications

Table 3:

Model

007

009

012

Fluid Pressure Drops

Flow Rate

(GPM)

1 1.4 0.61

1.5 2.9 1.26 5.5 2.1 0.91

2 4.9 2.11 7 3.2 1.41

3 10.1 4.38 10 6.1 2.67

4 16.9 7.34 13 9.9 4.28

1.5 2.3 1.00

2 3.9 1.68 7.5 4.8 2.09

2.5 5.8 2.51 10 8.1 3.51

3.25 9.3 4.03 12.5 12.1 5.25

4 13.5 5.85 15 16.8 7.29

2 1.7 0.72

3 3.4 1.50 8.75 4.2 1.82

4 5.8 2.51 10.5 5.8 2.53

Pressure

Drop (FOH)

Pressure

Drop (PSI)

Model

030

036

042

Flow Rate

(GPM)

4 1.2 0.51

5 2.3 1.01

7 2.8 1.22

Pressure

Drop (FOH)

Pressure

Drop (PSI)

015

018

024

5.5 10.2 4.45 13.25 8.9 3.85

7 15.8 6.88 16 12.4 5.41

2 1.6 0.69

3 3.3 1.44 10.67 6.0 2.61

4 5.5 2.41 12 7.4 3.22

5.5 9.8 4.28 14 9.8 4.25

7 15.2 6.60 16 12.4 5.41

3 4.1 1.80

4 7.0 3.02 12 6.2 2.69

5 10.4 4.52 15 9.2 4.02

6.5 16.7 7.25 17.5 12.2 5.30

8 24.2 10.53 20 15.5 6.74

3 2.0 0.87

4.5 4.1 1.80 13.5 4.9 2.12

6 6.9 3.01 17 7.4 3.22

8 11.6 5.06 20.5 10.4 4.50

048

060

070

8 3.6 1.55

9 3.7 1.60

10 2.8 1.24

10 17.4 7.56 24 13.8 5.98

Note

1- Temperature at which pressure drop applies (PD varies as the uid temperature)

2-Data is for Water

6 720 220 045

Subject to change without prior notice Revised 05-12

Unit Specications

Table 5: Air Temperature Rise/Fall

CP/BP Series

21

Entering Fluid

Temp °F

30

40

50

60

70

COOLING HEATING

Entering Air Temp °F Air Temp Drop °F Entering Air Temp °F Air Temp Rise °F

75/63 21.9 - 27.2 60 20.0 - 28.5

80/67 22.9 - 28.5 70 19.0 - 27.0

85/71 23.8 - 29.5 80 17.7 - 25.2

75/63 20.5 - 25.8 60 23.3 - 32.8

80/67 21.5 - 27 70 22.0 - 31.0

85/71 22.3 - 28.1 80 20.5 - 29.0

75/63 19.2 - 24.7 60 26.5 - 37.1

80/67 20.1 - 25.8 70 25.1 - 35.1

85/71 20.9 - 26.8 80 23.4 - 32.7

75/63 17.9 - 23.8 60 29.8 - 41.4

80/67 18.7 - 24.9 70 28.2 - 39.1

85/71 19.5 - 25.8 80 26.3 - 36.4

60 16-8 - 25.1

70 15.9 - 23.7

80 14.8 - 22.1

80

85

90

100

110

75/63 16.6 - 23.0 60 32.7 - 45.7

80/67 17.4 - 24.0 70 30.9 - 43.1

85/71 18.1 - 25.0 80 28.8 - 40.2

75/63 16.0 - 22.6

80/67 16.8 - 23.6

85/71 17.4 - 24.5

75/63 15.4 - 22.2

80/67 16.1 - 23.2

85/71 16.8 - 24.1

75/63 14.2 - 21.4

80/67 14.9 - 22.4

85/71 15.4 - 23.3

75/63 13.0 - 21.1

80/67 13.7 - 22.1

85/71 14.2 - 23.0

Revised 05-12 Subject to change without prior notice

6 720 220 045

22

CP/BP Series

Table 6: Refrigerant Pressure Ranges

COOLING HEATING

Entering

Fluid

Temp

°F

30

40

50

60

70

80

90

100

110

Fluid

Δ T

5 68 - 79 233 - 266 71 - 84 246 - 281

10 65 - 76 222 - 255 68 - 80 235 - 269

15 59 - 71 216 - 248 62 - 75 228 - 261

5 113 - 147 138 - 156 117 - 152 142 - 161 119 - 155 145 - 164 80 - 95 244 - 282 85 - 100 257 - 297

10 113 - 147 145 - 164 117 - 152 150 - 170 119 - 155 153 - 173 77 - 91 237 - 274 82 - 96 250 - 289

15 113 - 147 151 - 170 117 - 152 156 - 175 119 - 155 159 - 179 72 - 86 226 - 262 76 - 90 238 - 276

5 115 - 149 164 - 185 119 - 154 170 - 191 121 - 157 173 - 195 95 - 113 255 - 302 100 - 119 269 - 319

10 115 - 149 173 - 194 119 - 154 178 - 200 121 - 157 182 - 204 91 - 109 248 - 290 96 - 115 261 - 306

15 115 - 149 179 - 200 119 - 154 184 - 207 121 - 157 188 - 211 86 - 103 237 - 282 90 - 108 250 - 297

5 117 - 151 194 - 218 121 - 156 200 - 224 123 - 159 204 - 229 111 - 133 270 - 324 117 - 141 285 - 342

10 117 - 151 204 - 228 121 - 156 211 - 235 123 - 159 215 - 240 106 - 129 258 - 311 112 - 136 273 - 329

15 117 - 151 211 - 235 121 - 156 218 - 242 123 - 159 222 - 247 101 - 122 251 - 302 106 - 128 265 - 319

5 119 - 153 228 - 254 122 - 158 235 - 262 125 - 161 240 - 267 129 - 158 282 - 343 136 - 167 297 - 362

10 119 - 153 238 - 265 122 - 158 246 - 273 125 - 161 251 - 279 124 - 150 274 - 333 131 - 159 289 - 351

15 119 - 153 246 - 273 122 - 158 254 - 281 125 - 161 259 - 287 117 - 146 262 - 320 123 - 154 276 - 337

5 121 - 155 265 - 294 124 - 160 273 - 303 127 - 163 279 - 309 148 - 184 299 - 366 156 - 194 315 - 387

10 121 - 155 276 - 306 124 - 160 285 - 316 127 - 163 291 - 322 143 - 176 286 - 352 151 - 185 302 - 371

15 121 - 155 285 - 315 124 - 160 294 - 325 127 - 163 300 - 332 136 - 169 278 - 343 143 - 179 294 - 362

5 123 - 157 306 - 337 126 - 162 316 - 348 129 - 165 322 - 355

10 123 - 157 319 - 351 126 - 162 329 - 363 129 - 165 336 - 370

15 123 - 157 329 - 362 126 - 162 339 - 373 129 - 165 346 - 381

5 124 - 159 351 - 387 128 - 164 363 - 399 131 - 167 370 - 407

10 124 - 159 367 - 403 128 - 164 378 - 416 131 - 167 386 - 424

15 124 - 159 376 - 413 128 - 164 388 - 426 131 - 167 396 - 435

5 126 - 161 403 - 441 130 - 166 416 - 455 133 - 169 424 - 464

10 126 - 161 419 - 458 130 - 166 432 - 472 133 - 169 441 - 482

15 126 - 161 429 - 470 130 - 166 443 - 485 133 - 169 452 - 495

70 °F 75 °F 80 °F 60 °F 70 °F

Suction Discharge Suction Discharge Suction Discharge Suction Discharge Suction Discharge

Entering Air Temp (Dry Bulb) Entering Air Temp (Dry Bulb)

Unit Specication

This chart shows approximate temperatures and pressures for a unit in good repair. The values shown are meant as a guide only and should not
be used to estimate system charge.

This chart assumes rated air ow and 80º d.b./67º w.b. entering air temperature in cooling, 70º d.b. entering air temperature in heating. Heating
data at entering uid temperatures below 50º assumes the use of antifreeze.

As a result of continuing research and development, specications are subject to change without notice.

6 720 220 045

Subject to change without prior notice Revised 05-12

Unit Specications

Table 7: Blower Performance

Model

BP007

BP009

BP012

BP015

BP018

CP/BP024

CP/BP030

CP/BP036

CP/BP042

CP/BP048

CP/BP060

CP/BP070

Motor

Speed

High 430 420 390 360 335 310 260 - - - - -

Medium 420 390 365 335 310 270 - - - - - -

Low 370 360 340 315 285 245 - - - - - -

High 430 420 390 360 335 310 260 - - - - -

Medium 420 390 365 335 310 270 - - - - - -

Low 370 360 340 315 285 245 - - - - - -

High 450 435 415 400 385 360 330 305 - - - -

Medium 425 405 385 375 360 335 310 - - - - -

Low 390 380 365 350 335 315 290 - - - - -

High 590 555 500 475 450 435 415 390 - - - -

Medium 530 490 455 425 400 365 335 - - - - -

Low 440 395 360 325 290 250 - - - - - -

High 700 665 635 605 560 525 510 475 440 - - -

Medium 615 590 550 510 480 440 400 - - - - -

Low 520 490 440 400 380 360 - - - - - -

High 950 920 900 885 855 830 800 780 720 690 630 -

Medium 830 810 780 750 735 690 630 610 590 - - -

Low 700 675 650 615 550 520 - - - - - -

High 1200 1190 1180 1155 1130 1110 1080 1060 1035 995 925 900

Medium 1070 1040 1015 1005 980 960 935 920 910 885 850 815

Low 930 905 880 855 840 815 790 755 745 675 - -

High 1440 1410 1385 1360 1290 1225 1165 1095 1030 940 860 -

Medium 1310 1275 1270 1250 1220 1190 1150 1075 1000 930 840 -

Low 1155 1120 1080 1050 1035 1020 1000 975 950 920 - -

High 1710 1680 1650 1630 1600 1530 1440 1350 1300 1250 - -

Medium 1500 1470 1440 1400 1360 1345 1330 1275 - - - -

Low 1275 1240 1195 1185 1125 1085 - - - - - -

High 2000 1885 1870 1845 1815 1770 1745 1720 1710 1700 1680 -

Medium 1750 1700 1660 1625 1615 1590 1565 1540 1500 - - -

Low 1500 1470 1440 1400 1360 1345 1330 - - - - -

High 2370 2325 2300 2275 2255 2200 2190 2150 2100 2060 2050 2030

Medium 2090 2080 2030 1995 1950 1925 1900 1865 1820 1770 1730 1680

Low 1745 1700 1650 1620 1590 1560 1530 1490 1450 1390 - -

High 2400 2350 2325 2300 2260 2205 2200 2195 2167 2105 2085 2060

Medium 2125 2100 2050 1990 1975 1950 1890 1850 1815 1810 1780 1730

Low 1800 1750 1700 1675 1620 1580 1565 1510 1470 1410 - -

0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20

CP/BP Series

Available External Static Pressure (ins., Gauge. Wet coil and lter included)

23

Revised 05-12 Subject to change without prior notice

6 720 220 045

24

CP/BP Series

TYPICAL WIRING DIAGRAMS
1 Stage - 1 Phase - ECM Motor

Typical Wiring Diagrams

6 720 220 045

Subject to change without prior notice Revised 05-12

Typical Wiring Diagrams

1 Stage - 1 Phase - Direct Drive Motor

CP/BP Series

25

Revised 05-12 Subject to change without prior notice

6 720 220 045

26

CP/BP Series

1 Stage - 1 Phase - Direct Drive Motor - Hot Gas Reheat

Typical Wiring Diagrams

6 720 220 045

Subject to change without prior notice Revised 05-12

Typical Wiring Diagrams

1 Stage - 1 Phase - ECM Motor - Hot Gas Reheat

CP/BP Series

27

Revised 05-12 Subject to change without prior notice

6 720 220 045

28

CP/BP Series

Unit Check-Out Sheet

UNIT CHECK-OUT SHEET

Customer Data

Customer Name ________________________________________________ Date __________________________________
Address ________________________________________________________
__________________________________________________________________
Phone __________________________________________________________ Unit Number _________________________

Unit Nameplate Data

Unit Make ______________________________________________
Model Number _________________________________________ Serial Number_______________________________
Refrigerant Charge (oz) _____________________

Compressor: RLA ____________________ LRA ______________

Blower Motor: FLA (or NPA) __________ HP _______________

Maximum Fuse Size (Amps) ________________

Minimum Circuit Ampacity (Amps) _________

Operating Conditions

Cooling Mode Heating Mode

Entering / Leaving Air Temp

Entering Air Measured at:

Leaving Air Measured at:

Entering / Leaving Fluid Temp

Fluid Flow (gpm)

Compressor Volts / Amps

Blower Motor Volts / Amps

Source Fluid Type

Fluid Flow (gpm)*

Fluid Side Pressure Drop*

Suction / Discharge Pressure (psig)*

Suction / Discharge Temp*

Suction Superheat*

Entering TXV / Cap Tube Temp*

Liquid Subcooling*

* Required for Troubleshooting ONLY

______________ / _____________ ______________ / _____________

_______________________________ ______________________________

_______________________________ ______________________________

______________ / _____________ ______________ / _____________

______________________________ ______________________________

______________ / _____________ ______________ / _____________

______________ / _____________ ______________ / _____________

_______________________________ ______________________________

______________________________ ______________________________

______________________________ ______________________________

______________ / _____________ ______________ / _____________

______________ / _____________ ______________ / _____________

_______________________________ ______________________________

_______________________________ ________________________________

_______________________________ ________________________________

Auxiliary Heat

Unit Make ______________________________________________
Model Number _________________________________________ Serial Number_______________________________
Max Fuse Size (Amps) __________________________________
Volts / Amps_____________________ /______________________
Entering Air Temperature
Leaving Air Temperature _______________________________

_______________________________

Bosch Group 601 NW 65th Court Fort Lauderdale, FL 33309

6 720 220 045

Phone: [phone] Fax: [phone]

http://www.fhp-mfg.com

Subject to change without prior notice Revised 05-12

Troubleshooting

TROUBLESHOOTING

Problem Possible Cause Checks and Corrections

Entire unit
does not run

Blower
operates but
compressor
does not

Power Supply Off Apply power, close disconnect

Blown Fuse Replace fuse or reset circuit breaker. Check for correct fuses

Voltage Supply Low If voltage is below minimum voltage specied on unit data plate,

contact local power company.

Thermostat Set the fan to “ON”, the fan should run. Set thermostat to “COOL”

and lowest temperature setting, the unit should run in the cooling
mode (reversing valve energized). Set unit to “HEAT” and the highest
temperature setting, the unit should run in the heating mode (reversing
valve deenergized).
If neither the blower or compressor run in all three cases, the
thermostat could be miswired or faulty. To ensure miswired or faulty
thermostat verify that 24 volts is available at the low voltage terminal
strip between “R” and “C”, “Y” and “C”, and “O” and “C”. If the blower
does not operate, verify 24 volts between terminals “G” and “C”.
Replace the thermostat if defective.

Thermostat Check setting, calibration, and wiring

Wiring Check for loose or broken wires at compressor, capacitor, or contactor

Safety Controls Check UPM board red default L.E.D. for Blink Code

CP/BP Series

29

Unit off on
high pressure
control

Unit off on
low pressure
control

Unit short
cycles

Compressor
overload open

Compressor motor
grounded

Compressor
windings Open

Discharge pressure
too high

Refrigerant charge The unit is overcharged with refrigerant. Reclaim refrigerant, evacuate

High pressure Check for defective or improperly calibrated high pressure switch.

Suction pressure
too low

Refrigerant charge The unit is low on refrigerant. Check for refrigerant leak, repair,

Low pressure
switch

Unit oversized Recalculate heating and or cooling loads.

Thermostat Thermostat installed near a supply air grill; relocate thermostat.

Wiring and controls Check for defective or improperly calibrated low pressure switch.

If the compressor is cool and the overload will not reset, replace
compressor

Internal winding grounded to the compressor shell. Replace
compressor.

After compressor has cooled, check continuity of the compressor
windings. If the windings are open, replace the compressor

In “COOLING” mode: Lack of or inadequate water ow. Entering water

temperature is too warm. Scaled or plugged condenser.

In “HEATING” mode: Lack of or inadequate air ow. Blower inoperative,
clogged lter or restrictions in duct work

and recharge with factor recommended charge.

In “COOLING” mode: Lack of or inadequate air ow. Entering
air temperature is too cold. Blower inoperative, clogged lter or

restrictions in duct work

In “HEATING” mode: Lack of or inadequate water ow. Entering water

temperature is too cold. Scaled or plugged condenser.

evacuate and recharge with factory recommended charge.

Check for defective or improperly calibrated low pressure switch.

Readjust heat anticipator.

Revised 05-12 Subject to change without prior notice

6 720 220 045

30

CP/BP Series

Troubleshooting

Insufcient

cooling or
heating

UPM board
trouble
shooting

Unit undersized

Loss of conditioned
air by leakage

Airow

Refrigerant charge

Compressor

Reversing Valve

Operating
pressures

TXV

Moisture,
noncondensables

Compressor will
not run, no fault
blink code

Recalculate heating and or cooling loads. If excessive, possibly
adding insulation and shading will rectify the problem

Check for leaks in duct work or introduction of ambient air
through doors or windows

Lack of adequate air ow or improper distribution of air.
Replace dirty lter

Low on refrigerant charge causing inefcient operation

Check for defective compressor. If discharge is too low and
suction pressure is too high, compressor is not pumping
properly. Replace compressor.

Defective reversing valve creating bypass of refrigerant from
discharge of suction side of compressor. Replace reversing
valve

Compare unit operation pressures to the pressure/temperature
chart for the unit.

Check TXV for possible restriction or defect. Replace if
necessary.

The refrigerant system may be contaminated with moisture

or noncondensables. Reclaim refrigerant, replace lter dryer,

evacuate the refrigerant system, and recharge with factory
recommended charge.

Yes

UPM Board

is Good

Is Green

Power LED

light on and

no Red

Blink Code?

Yes

No

Is there

power to

the “Y” Call

(C-Y)?

- Check all

power supplies

- Check all

safety switches

Yes

No

Is there 24 V

power from

C to CC?

Check

thermostat

settings and

configurations

for heat

pumps, and

wiring

No

Check for Red

Blink Code.

If Red Blink

Code is not

present, replace

UPM Board

6 720 220 045

Subject to change without prior notice Revised 05-12

Notes

CP/BP Series

31

Revised 05-12 Subject to change without prior notice

6 720 220 045

601 N.W. 65th Court, Ft. Lauderdale, FL 33309
Phone: [phone] | Fax: [phone]
www.boschtaxcredit.com | www.bosch-climate.us