Baxi PREMIER PLUS 800L Guide

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INSTALLATION AND USER INSTRUCTIONS
800L - 2500L Indirect
PREMIER PLUS
Russian Instructions on page 21

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IMPORTANT
PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE
INSTALLING THE BAXI PREMIER PLUS WATER HEATER. INCORRECT
INSTALLATION MAY INVALIDATE GUARANTEE.
THE BAXI PREMIER PLUS WATER HEATER MUST BE INSTALLED BY A
QUALIFIED INSTALLER IN ACCORDANCE WITH LOCAL PLUMBING, BUILDING
AND ELECTRICAL REGULATIONS
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.
Also:
- Water may drip from the discharge pipe of the pressure-relief device and this pipe
must be left open to the atmosphere;
-The pressure-relief device is to be operated regularly to remove lime deposits and to
verify that it is not blocked;
- How hot water can be drained. (see page 10 for details)
TECHNICAL SPECIFICATIONS
Rated pressure: 1.5MPa (15 bar) Max*
Test pressure (hydraulic): 2.3MPa (23 bar)
Minimum recommended supply pressure: 0.15MPa (1.5 bar)
See Table 2, page 4 for a full specication list.
* A TPR (Temperature and Pressure Relief) valve between 8 Bar and 15 bar must be
installed. These tanks are supplied with a 10 Bar TPR.
1. IMPORTANT INSTALLATION POINTS
1.1 The BAXI Premier Plus water heater MUST be tted with a pressure relief valve
rated at 8 bar. FAILURE TO PROVIDE ADEQUATE PRESSURE RELIEF WILL
INVALIDATE ANY GUARANTEE AND LEAD TO A DANGEROUS INSTALLATION.
1.2 Where the inlet pressure exceeds 6 bar a pressure reducing valve (set at max.
6 bar) should be tted to the inlet supply to the heater. This MUST NOT be tted
between the pressure relief valve and the water heater (see Diagram 3, page 6).
1.3 A Check (Non-return) Valve should be tted to the inlet supply to the water heater.
This MUST NOT be tted between the pressure relief valve and the water heater.
(see Diagram 3, page 6). This may be provided as part of the inlet security group.

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2. INSTALLATION – GENERAL
REQUIREMENTS
2.1 National Wiring rules may contain restrictions concerning the installation of these
water heaters in certain areas, eg bathrooms.
2.2 The water heater MUST be installed vertically.
2.4 Enough space should be left around the water heater for pipe connections and
for access to controls and any safety valves tted. Refer to diagram 2, page 5
and the dimensions table, page 4 to determine a suitable position for the water
heater.
2.5 NOTE: Ensure the oor can support the full weight of the water heater, see table
below, for cylinder weights.
2.6 DO NOT install where the water heater may freeze.
Diagram 1 - Lifting

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Table 1: Dimensions
Direct Connection 800L 1000L Connection 1250L 1450L Connection 2000L 2500L
AN/A 1906 2301 N/A 1936 2253 N/A 2014 2419
B1487 1882 1408 1693 1410 1515
C437 437 527 527 606 605
DN/A 1024 1024 N/A 1224 1224 N/A 1470 1470
E
F
G
443 443 527 527 599 599
618 618 707 707 779 779
1183 1433 1172 1373 1225 1474
1 1/4” BSP
1 1/4” BSP
1 1/2” BSP 2” BSP
1 1/2” BSP
1 1/2” BSP
1 1/2” BSP
1 1/2” BSP
1 1/2” BSP
N/A N/A N/A
1” BSP 1” BSP 1” BSP
Table 2: Technical data
Notes:
1. Only 1 immersion heater per cylinder, bottom boss for inspection only.
2. At a primary flow temperature of 80°C +/- 2°C
3. The primary coil should not be exposed to more than 0.3MPa (3 bar) without the cylinder
being full of water and under the minimum working pressure.
4. Temperature rise 15°C - 60°C (45°C)
5. Tested to EN 12897:2006
800
1000 1250
1450 2000 2500
Max direct kW rating 45 45 54 54 54 54
Coil surface area (m²) 3.0 3.0 5.0 5.0 7.5 7.5
Coil heat up times
(Mins)4
15l/min 80 91 112 130 180 225
30l/min 48 59 62 72 99 124
60/min 32 39 40 50 48 62
Coil rating (kW) ²
15l/min 31.3 32.9 35.0 30.1 40.2 37.5
30l/min 52.7 51.4 63.6 61.2 98.4 86.4
60l/min 76.9 76.5 97.9 91.7 132.2 126.4
Pressure drop through
coil (Bar)
15l/min 0.01 0.01 0.01
30l/min 0.08 0.06 0.07
60l/min 0.44 0.25 0.30
Heat loss (kW/24hrs) 2.74 3.33 3.60 3.90 4.30 4.50
Weight empty (kg) 164 188 319 322 445 450
Weight full (kg) 964 1188 1569 1872 2445 2950
Max mains pressure 2.5 MPa (25 bar)
Max design pressure 1.3 MPa (13 bar)
Operating pressure/PRV set pressure 1.0 MPa (10 bar)
Max primary pressure ³ 1.0MPa (10 bar)
Expansion relief valve setting 1.3 MPa (13 bar)
Immersion heater electrical rating
single phase
6kW and 9kW 50/60Hz ~
Immersion heater electrical rating
three phase
12kW - 54kW 50/60Hz ~
T&P Rating 90°C/10 bar

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3. INSTALLATION – PLUMBING
3.1 Refer to section IMPORTANT INSTALLATION POINTS. Plumb in valves in the
sequence shown in Diagram 3, page 6. Ensure the valves are installed in the correct
orientation by reference to the direction of ow arrows marked on them.
3.2 The water connections on the water heater accept direct connection of 1” (to t
28mm pipe). The thread on the connections is G1” to enable the use of G1” male
connections to be used if required.
3.3 The sanitary water INLET is marked BLUE, the OUTLET is marked RED. Several
hot outlets can be served, however, individual site demands should be considered
when choosing capacity and the number of outlets to be served.
3.4 It is recommended that an isolating valve is tted on the cold water supply to the
heater.
3.5 A drain valve must be tted below the heater in the inlet pipe work. It must be sited
between the heater and the check valve or inlet valve set, if tted, (see Diagram 3, below)
3.6 A sanitary circuit expansion vessel may be tted to the cold water supply as shown
in Diagram 3, below to prevent wastage of expanded water. A range of expansion
vessels are available for this range of cylinders, see page 12 for details.
3.7 A re-circulation circuit can be installed on the sanitary water circuit. A connection
is provided for the re-circulation circuit return pipe (threaded G1” female). This
connection is supplied with a blanking plug tted which should be removed before
connecting the re-circulation circuit return pipe (see diagram 4, page 6).
3.8 The primary heating circuit MUST be fully pumped.
3.9 The connection sizes to the primary ow and primary return are shown in table 1,
page 4.
E
F
A
C
B
35°
40°
30°
45°
D
Diagram 2 - Dimensions

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Diagram 4
Diagram 3
Element
Primary flow
Primary return
Secondary
return
To hot outlets
Mains water
supply
Balanced cold
water connection
Pressure reducing
valve
Pressure relief
valve
Inlet
Drain valve
Tundish
Discharge pipe
Boiler thermostatic
controls
Temperature
and Pressure
(T&P)
relief valve
Secondary
return
WRAS approved
pump
Cold water inlet
To hot outlets
None-return valve

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4. ELECTRICAL REQUIREMENTS
4.1 The BAXI Premier Plus water heater is suitable for use with most gas or oil
red boilers provided the boiler has adequate thermostatic control and over-
temperature protection. If in doubt consult the boiler manufacturer.
4.2 The primary ow from the boiler MUST be pumped. Gravity circulation will not
work due to the special design of the primary heat exchanger. It is recommended
that an air bleed point or automatic air vent is incorporated into the highest point in
the system.
4.3 The water heater is tted with a control thermostat suitable for the control of the
sanitary water storage temperature. This thermostat should be connected, via the
terminal block provided, to the primary heating circuit controls. See diagrams 5
and 6, page 7 for wiring information.
1 2 3C 2
High limit
thermostat
Control
thermostat
Common
(S/L)
Load (Demand Contact)
Satised
C
0
30
40
50
60
70
°C
Temperature
Adjustment
Thermal cut-out
reset under screw
head
Diagram 5
Diagram 6

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5. COMMISSIONING
5.1 DO NOT switch on either the immersion heater or boiler until the water heater has
been lled with water and checked for leaks.
5.2 Check that all installation, electrical and discharge pipe requirements have been
met.
5.3 Check that all water and electrical connections are correctly made and are tight.
5.4 Open a hot tap supplied by the water heater, turn on the cold water supply to the
water heater.
5.5 Allow the water heater to ll and leave the hot tap running for a short while to
purge any air and ush out the pipe work. Close the hot tap.
5.6 Open successive hot taps to purge any air from the system.
5.7 With all hot taps closed, check the system for water leaks and rectify as
necessary.
5.8 Manually test the operation of the pressure relief valve. Ensure water ows freely
from the valve and through the discharge pipe.
5.9 Fill the primary circuit following the boiler manufacturers commissioning
instructions. If motorised valves are used to control the primary ow ensure these
are set to the manual open position for commissioning. When the primary circuit
is full return the motorised valves to the AUTO position. Vent any trapped air by
opening the air bleed point or automatic air vent.
5.10 For heating by immersion heater (if tted), switch on the electrical supply to the
water heater and allow the water heater to heat. The thermostat is factory set to
control the storage temperature to approx. 60oC. Follow the immersion heater
tting instructions to change the set temperature to any required temperature.
5.11 For heating by indirect heat exchanger switch on the electrical supply to the
boiler and ensure the programmer is set to HOT WATER mode. Check that any
motorised valves or primary pumps are working and allow the water heater to
heat. The indirect control thermostat is factory set to give a storage temperature of
approx. 60oC. If necessary the temperature can be adjusted by rotating the knob
on the front of the control box, see diagram 6, page 7.

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6. MAINTENANCE - DESCALING
IMMERSION HEATER (IF FITTED)
Warning: Before starting any work on the Baxi PremierPlus immersion
heater(s) switch off all electrical supplies to such immersion heater(s) including
thermostatic controls, these may be on a separate circuit.
6.1 Little maintenance is required, however in hard water areas the water heater will
require periodic de-scaling to ensure efcient operation. To de-scale the water
heater Immersion (if tted):
6.2 Switch off and disconnect the electrical supply and shut down the boiler (indirect
water heaters). Turn off the water supply to the water heater.
6.3 Open a hot tap served by the water heater to relieve any system pressure. Empty
the water heater by opening the drain valve in the inlet pipe work.
6.4 Remove the immersion heater cover and disconnect all wiring from the immersion
and thermostatic controls .
6.5 Remove the 8 bolts and withdraw the immersion heater from the cylinder. Take
care when lifting the immersion heater out of the cylinder and work within safe
working practices.
6.6 Carefully remove any scale from the surface of the element. DO NOT use a sharp
implement as damage to the element surface could be caused.
6.7 Ensure sealing surfaces are clean and seals are undamaged. If in doubt t a new
seal. The seal should be pre-soaked in ambient temperature water for 30 mins
before installation.
6.8 Replace immersion heater by replacing the 8 bolts and make sure they are
diametrically tightened and correctly torqued (20Nm or 14.7lb/ft).
6.9 Replace the immersion heater thermostat and thermal cut-out, ensure the
thermostat is pushed fully home.
6.10 Rewire the immersion heater and thermostatic controls in accordance with
immersion heater instructions
6.11 DO NOT SWITCH ON EITHER THE BOILER OR IMMERSION HEATER UNTIL
THE WATER HEATER HAS BEEN RE-FILLED WITH WATER. Re-commission the
water heater following the Installation and commissioning instructions.

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7. MAINTENANCE - DESCALING
THE WATER HEATER
Warning: Before starting any work on the Baxi PremierPlus cylinder switch off
all electrical supplies to all controls and immersion heaters (if tted), these may
be on a separate circuit.
7.1 Switch off and disconnect the electrical supply and shut down the boiler (indirect
water heaters). Turn off the water supply to the water heater.
7.2 Open a hot tap served by the water heater to relieve any system pressure. Empty
the water heater by opening the drain valve in the inlet pipe work.
7.3 Remove the immersion heater cover and disconnect all wiring from the immersion
and thermostatic controls.
7.4 Remove the 8 bolts and withdraw the immersion heater from the cylinder. Take
care when lifting the immersion out of the cylinder and work within safe working
practices.
7.5 The loose scale in the base of the water heater can be removed by inserting the
suction hose on a “wet and dry” vacuum cleaner and sucking the scale out of the
water heater.
7.6 Replace immersion heater by replacing the 8 bolts and make sure they are
correctly torqued (20Nm or 14.7lb/ft).
7.7 Replace the immersion heater thermostat and thermal cut-out, ensure the
thermostat is pushed fully home.
7.8 Rewire the immersion heater and thermostatic controls in accordance with
immersion heater instructions.
7.9 DO NOT SWITCH ON EITHER THE BOILER OR IMMERSION HEATER UNTIL
THE WATER HEATER HAS BEEN RE-FILLED WITH WATER. Re-commission the
water heater following the Installation and commissioning instructions.
NOTE: The gasket should be pre-soaked in ambient temperature water for 30 mins
before installation and the 8 securing nuts are diametrically tightened to 20 Nm or
0.42psi