Baxi HP40 User guide

IMPORTANT
Please read & understand this manual before commencing installation
and leave it with the customer for future reference.
United Kingdom
en
Baxi HP40/HP50 Monobloc Heat Pumps &
Baxi ASHP Cylinder
Cylinder Electrical Back-up to HP Connection &
Set-up Procedure

Introduction............................................................. 2
Baxi HP40/HP50 Monobloc Heat Pumps ............... 3
Contents The cylinder is a purpose designed unvented water
heater. The unit has a stainless steel inner vessel,
which ensures an excellent standard of corrosion
resistance. The outer casing is a combination of
resilient thermoplastic mouldings and plastic coated
corrosion proofed steel sheet. All products are insulated
with CFC free polyurethane foam to give good heat
loss performance.
The unit is supplied complete with all the necessary
safety and control devices needed to allow connection
to the cold water mains. All these components are
preset and not adjustable.
This appliance complies with the requirements of the
CE marking directive and is Kiwa approved to show
compliance with Building Regulations (Section G3).
The following instructions are o󰀨ered as a guide to
installation which must be carried out by a competent
plumbing and electrical installer in accordance with
Building Regulation G3, The Building Standards
(Scotland) Regulations 1990, or The Building
Regulations (Northern Ireland).
NOTE: Prior to installation the unit should be stored
in an upright position in an area free from excessive
damp or humidity.
IMPORTANT NOTE: FOR DETAILS OF HOW TO
INSTALL THE CYLINDER IN ACCORDANCE WITH
BUILDING REGULATIONS PLEASE REFER TO
THE INSTALLATION & SERVICE MANUAL THAT
ACCOMPANIES IT.
Introduction
The HWA Charter’s Code of Practice requires that all members adhere to the following:
• To supply t for purpose products clearly and honestly described
• To supply products that meet, or exceed appropriate standards and building and water
regulations
• To provide pre and post sales technical support
• To provide clear and concise warranty details to customers
General Requirements
IMPORTANT: This appliance can be used by
children aged from 8 years and above and
persons with reduced physical sensory or
mental capabilities or lack of experience and
knowledge if they have been given supervisory
or instruction concerning use of the appliance
in a safe way and understand the hazards
involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be
made by children without supervision.
2

3
Baxi HP40/HP50 Monobloc Heat Pumps
12
230 V~50 Hz
400 V~50 Hz
M
M
AB
B230 V~50 Hz
VC
A
KM4
Notes:
12 - Temperature sensor - 10 m long (supplied with Baxi HP40/HP50 Monobloc Heat Pump)
VC - Diverter valve - 28 mm connections (supplied with Baxi ASHP Cylinder)
Important
A temperature sensor and T5 adaptor (part no. 7750595) are required to enable the kit to operate correctly and to
connect the sensor to the PCB. One each of the sensor and T5 adaptor are supplied with the heat pump. If these are
already being used for another of the products functions please order part no. 7750595.
Fig. 1: Hydraulic Schematic.
Warning
The schematics below are based on the Baxi HP40/HP50 Monobloc Heat Pump range. See manufacturers
instructions on how to connect the cylinder wiring to other heat pumps to ensure shut down of all heat sources in
the event of a thermal cut out on the cylinder.

4
Notes: DHW sensor connection:
1. Identify the output from the heat pump - CN13 on PCB “A” Main Control Board Hydraulic.
2. Route the domestic hot water sensor cable via the low voltage cable feedthrough on the heat pump.
3. Fit the sensor connector onto the T5 adaptor.
4. Insert the sensor into the overheat thermostat pocket.
Notes: Diverter valve connection:
1. Identify the output from the heat pump - CN11 connections 5 & 6 (N=16) on PCB “A” Main Control Board Hydraulic.
2. Route the valve power cable via the high voltage cable feedthrough on the heat pump.
3. Connect the valve power cable to PCB “A” Main Control Board Hydraulic.
Fig. 2: Connecting the Domestic Hot Water Sensor and the Diverter Valve.
4/5 kW 7/8/11/13/ kW
A
A
1
4
A = Main Hydraulic Control Board
92 03 32
25 26 27 28
31
7
1211
9 01
18
8
7
5
4222 32
1 2
13
346
20
14 15 17 19
16 21
6 8 9 10
54321
CN4
CN22
CN5
S3
DIS1
CN24
CN1
CN2
CN6
CN8
CN13
CN15
CN16
CN18
CN28
S2
CN42
CN21
S1
S4
CN11 CN7
CN17
CN19
CN30
CN35
CN14
CN31
CN36
CN25
CN29
CN40
CN41
CN32
SW9
SV1
5 6 16
92 03 32
25 26 27 28
31
7
5 6
16
6 8 9 10
54321
CN11 CN7 CN30
3
Insert sensor into
same pocket as
overheat thermostat
T5 Adaptor
Heat Pump PCB CN13 Adaptor
2
Baxi HP40/HP50 Monobloc Heat Pumps

5
Port group Identifier
P
Port group
P
Port group
1
2
3
4
5
6
7
8
9
10
1
2
3
1
2
3
CN30
(high voltage)
Identifier
Identifier
Fig. 3: Connection Layout “A” for Baxi HP40/HP50 Monobloc Heat Pumps
Fig. 4: Immersion Backup Heater for Baxi Mono 2 AWHP.
92 03 32
25 26 27 28
31
7
1613
6 8 9 10
54321
CN11 CN7 CN30
1357
2468
A1
A2
See Fig. 5
KM4
Power supply
From A1 From A2
Connection of the immersion backup heater cable
depends on the application. Only when the cylinder is
installed will this wiring be needed. The unit only sends
an on/o󰀨 signal to the backup heater. An additional
contactor is supplied and a dedicated terminal is needed
to supply power to the backup heater.
The 25 A contactor supplied with the cylinder is ONLY
suitable for switching the 3 kW immersion heater in the
cylinder. Ensure that the cable is xed and the strain
relief is used.
Procedure
• Connect the cable to the appropriate terminals as
shown to connections 13 and 16.
• To prevent strain on the cable secure it with cable
ties to the cable tie mountings.
Control port signal type
Voltage
Maximum running current (A)
Wiring size (mm2)
Type 2
220-240 V AC
0.2
0.75
Note: The heat pump unit only sends an ON/OFF signal
to the immersion backup heater. The power source for the
heater must be supplied from a fused spur.
Baxi HP40/HP50 Monobloc Heat Pumps

6
92 03 32
25 26 27 28
31
7
1613
6 8 9 10
54321
CN11 CN7 CN30
Neutral
Fuse
Live
Earth
3 kW Immersion Backup Heater
L
A
B
S
T
12
3
Thermostat
Controls
13 - TBH
1 3 5 7
A1
KM4
A2
8642 Contactor
16 - N
Fig. 5: Immersion Backup Heater
SPINDLE POSITIONS
= MINIMUM TEMP
= MAXIMUM TEMP
= APPROX 60 °C
ROTATE SPINDLE CLOCKWISE
FOR TEMPERATURE INCREASE
AND COUNTER CLOCKWISE
FOR TEMPER A
TURE DECREASE.
THER
MAL CUT-OUT RESET BUTTON
IMPORTANT!
TEMPERATURE MUST BE SET TO
MAXIMUM TO MAXIMISE
EFFICIENCY OF HEAT PUMP AND
PROVIDE ADEQUATE WATER
TEMPERATURE IN VERY COLD
CONDITIONS
Fig. 6: Immersion Backup Heater Temperature Adjustment (remove lower cover).
Baxi HP40/HP50 Monobloc Heat Pumps

7
Table 1: DIP switch settings for heat pump to recognize 3 kW Immersion Backup Heater. Ensure switch S2-2 is in
the OFF position.
Note: Make sure settings are to this conguration - these should be factory default settings.
DIP switches are located on the Main Hydraulic Control Board (‘A’ as shown on page 4) and allow conguration of
Immersion Backup Heater.
1 2 3 4
S2
Switch o󰀨 the power supply before opening the switch box service panel and
making any changes to the DIP switch settings.
WARNING
DIP switch
S2 ON = 1; OFF = 0
1 = when inactive for 24 hours, pump's
blocking function is disabled - it does not
run for 1 minute
0 = when inactive for 24 hours, pump's
blocking function is enabled - it runs for
1 minute
1 = without Immersion Backup Heater
0 = with Immersion Backup Heater
0/0 = reserved (pump with max head 8.5 m)
0/1 = reserved (pump with constant speed)
1/0 = reserved (pump with max head 10.5 m)
1/1 = pump (with max head 9.0 m)
1
2
3/4
Baxi HP40/HP50 Monobloc Heat Pumps

The policy of Baxi Heating UK is one of continuous product development and, as such, we reserve the
right to change specications and guarantee terms and conditions without notice.
7841138-02 (4/23)
FOR UNITED KINGDOM
FOR IRELAND
Opening hours
Monday - Friday, 8.00am-6.00pm
Weekends & Bank Holidays, 8.30am-2.00pm
Baxi
Brooks House,
Coventry Road,
Warwick, CV34 4LL
0344 871 1545
Please note calls may be recorded for training and monitoring purposes
For Baxi Customer Support and
Technical Advice,
For Baxi Customer Support and
Technical Advice,
contact us at
contact us at
baxi.co.uk
Opening hours
Monday - Thursday, 8.00am-4.30pm, Friday, 8.00am-4.00pm
In-Warranty cover on Saturdays: 9am - 12pm October - March
We are closed on Bank Holidays, Christmas Day and New Year’s Day.
Baxi,
Unit F 5&6, Calmount Park,
Calmount Road,
Ballymount ,
Dublin 12, Ireland
00353 (0)1 4590870
www.baxi.ie
Please note calls may be recorded for training and monitoring purposes