Glow-worm 45/2 Back Boiler - Manual (Page 4)

4 221780A
FULLY PUMPED SYSTEM
(DIAGRAMMATIC)
Diagram 1.4
The COLD FEED PIPE may be connected to the flow
pipe, adjacent to the open vent pipe as shown .
(THERE MUST ALWAYS BE A COLD WATER PATH
TO THE RETURN CONNECTION Of THE BOILER.)
C
L BOILER
22mm MIN
OPEN VENT
INDIRECT
CYLINDER
MANUAL
AIR VENT
1 metre MIN
27 metres MAX
15mm
COLD
FEED
PUMP
HEATING
CIRCUIT
150mm
MAX
DRAIN COCK
1588
Diagram 1.3
PUMPED HEATING & GRAVITY DOMESTIC
HOT WATER (DIAGRAMMATIC)
1587
C
L BOILER
27 metres
MAX
PUMP
HEATING CIRCUIT
22mm
VENT
Refer to
B.S. 5546
28mm
INDIRECT
CYLINDER
15mm
COLD
FEED
DRAIN COCK
1 General
1.7 Sealed Water System
A kit and instructions, part number 426520, is available to
enable the back boiler to be used on a sealed water system.
Please give the serial number of the back boiler when ordering
the kit.
1.8 Hot Water Cylinder
The back boiler is suitable for open vented systems using an
indirect cylinder (including single feed self priming type). The
indirect cylinder must be fitted to the manufacturer’s
recommendations and the system must conform to the
requirements of the current issue of BS5546 and BS6700.
It is recommended that the indirect cylinder be fitted with some
form of temperature control.
1.9 Frost Protection
If the position of the back boiler is such that it may be vulnerable
to freezing it should be protected as specified in the current
issue of BS5422.
It is also recommended that a frost protection thermostat is
fitted.
1.10 Draining Tap
A draining tap must be provided at the lowest point of the
system which will allow the entire system, the back boiler and
hot water cylinder to be drained.
Draining taps shall be to the current issue of BS2879.
1.11 Safety Valve
A safety valve need not be fitted to an open vented system.
C
L C
L
3012/A
C
B
405mm
A
* CORNER IN-FILL
(not required to be full
depth of opening)
PREPARED
BOILER
BASE
100mm
Diagram 1.2 FRONT OPENING
A B C
Miami 3 BBU 350 405 to 580 560 to 590
Melody 3 BBU 350 405 to 580 560 to 590
Black Ash 3 350 406 to 460 560 to 590
*Brown Ember 3 350 510 to 580 560 to 590
Saxony 3 350 406 to 460 560 to 590
1.12 Back Boiler Location
This back boiler MUST NOT be installed in a private garage or
in a room containing a bath or shower or in a room used or
intended to be used as sleeping accommodation.
1.13 BSI Certification
This appliance is certificated to the current issue of BS6332 Part
1 invoking the current issue of BS5258 Part 8 for safety and
performance. It is, therefore, important that no alteration is
made to it without permission, in writing, from Hepworth Heating
Ltd.
Any alteration that is not approved by Hepworth Heating Ltd.,
could invalidate the BSI Certification of the boiler, warranty and
could infringe the current issue of the Statutory Requirements.