Hamworthy Purewell Variheat mk2 70c, Инструкция по установке, наладке и обслуживанию

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HAMWORTHY HEATING LTD
1
PUREWELL Variheat mk2 218612 A03
1.0 INTRODUCTION
1.1 A competent person holding ‘GAS SAFE’
registration or equivalent must install this boiler. All
installations
MUST conform to the relevant Gas
Safety and Building Regulations. Health & Safety
requirements must also be taken into account when
installing any equipment. Failure to comply with the
above may lead to prosecution.
This appliance is not intended for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instructions concerning cleaning, maintenance and
use of the appliance by a person responsible for their
safety. Children should be supervised to ensure that
they do not play with the appliance.
1.2 These instructions are for Group H Natural Gas
(2nd Family) only. The information relating to Natural
Gas firing is to be found in Appendix ‘A’. Boilers
MUST
NOT use gas other than that for which they were
designed and made.
1.3 The Purewell Variheat mk2 is a fully modulating,
pre-mix condensing, gas fired boiler manufactured
from horizontal cast iron heat exchanger sections,
connected to an economiser located in the base of
the boiler. The boiler is floor mounted and is intended
for the heating of Commercial and Industrial
premises. It may also be used to supply hot water for
these premises via an indirect cylinder.
1.3.1 Operation is initiated and controlled by a Navistem
boiler management system with a user interface LCD
display for accessing and changing boiler parameters.
1.3.2
The Purewell Variheat mk2 boiler is delivered to
site fully assembled fitted with it’s casing and
controls. Care should be taken when manoeuvring
the boiler into position to avoid damage.
1.3.3
Each of the boiler models is designed for direct
connection to a flue system. The flue system must be
suitable for pressurised wet operation. The flue
outlets from more than one unit may be connected to
a single chimney. No draught diverter is fitted to the
boiler nor is a fixed diverter required in the flue
system. However a draught stabiliser is
recommended for some installations —see Appendix
‘C’ (Page 41).
1.3.4 The Purewell Variheat mk2 has a low water
content and minimum flow rates MUST be maintained
above the recommended levels shown in Appendix
‘E’ (Page 45).
1.4 If the boiler is to be connected to an un-vented
(pressurised) heating system, care must be taken to
ensure all extra safety requirements are met and that
the relevant interlocks will shut down the boiler(s)
should a high or low pressure fault occur.
The pressurisation unit must also incorporate a low
level water switch, which protects the water pumps,
and will directly or indirectly shut down the boiler
plant should a low water condition occur
.
Consideration should also be given to the maximum
working pressure of the boiler as per Appendix ‘E’.
Consult Hamworthy Heating Technical Department
for help or assistance if in doubt.
1.5 The Purewell Variheat mk2 boiler is not suitable
for direct connection to domestic hot water supplies
or gravity fed heating systems.
1.6 The Purewell Variheat mk2 boiler can be installed
with either reverse return water flow layout or with
single pipe header layout (non HHL supply). See
Appendix E for typical schematic layout.
1.7 It is good practice in all heating installations to
use some form of water treatment to reduce
formation of lime scale and black iron oxide sludge.
The high efficiencies produced by the Purewell
Variheat
mk2 Boiler can easily be reduced by lime
scale formation. If a pressurisation unit is used, it is
prudent to include an hours run meter to give an
indication of pump running time and hence raw water
make-up. Any leaks should be attended to as soon as
possible to avoid scale build up within the boiler's
waterways.
1.8 Each Purewell Variheat mk2 module is supplied
with volt free contact outputs for Normal Run, Boiler
lock-out from a General Fault, 0~10v analogue
control input. Also provided are connections for BMS,
Shunt Pump & Remote On/Off control as well as
connections to a boiler lock circuit (causing the boiler
to go to standby).
1.9 Options
1.9.1
Optional reverse return header kits are
available in 2, 3 & 4 boiler configuration covering
models 70c, 95c, 110c, 140c & 180c. These kits
incorporate all necessary valves and interconnecting
pipework. Refer to individual kit instructions for
details.
1.9.2 Controls peripherals
The Navistem boiler management system has the
potential to accept the following control options:
1.9.3 OCI345 LPB Clipin – Kit part number: 563605667
BSB to LPB interface to allow communication between
boilers for Cascade of 16 boilers by LMS or
communication to external RVS system components
(e.g. Merley sequence controller).
1.9.4 For additional kit information please refer to
Appendix F (page 50).