Quantum Hot Spring Troubleshooting guide

Storage Capacities 90, 125, 150, 170, 200, 250, and 300 Litres
Hot Spring
Installation, User and Service Manual
Domestic Hot Water Cylinder

2
Quantum
Installation, User and Service Manual
Important -This Manual Should Be Left With The Householder After Installation
Index
Section Page
1 Introduction 2
2 Technical specifications 3
3 Check list 3
4 General requirements 4
5 Primary circuit installation 6
6Secondary circuit installation 10
7Discharge arrangement 12
8 Electrical installation 15
9 Filling and commissioning 17
10 Servicing and maintenance 18
11 Fault finding 19
12 User instructions 20
13 Warranty 20
1. Introduction
The Quantum “Hot Spring” is a high quality stainless steel domestic hot water cylinder
suitable for use on “unvented” or “open vented” hot water systems. The indirect heat exchange
surfaces are designed to provide a rapid heat up. The unit incorporates a 3kW electric immersion
heater as a “backup” or for summer use. When the unit is supplied for unvented applications, it
comes complete with all the necessary safety equipment to comply with legislation governing the
installation of such systems. The immersion heater and temperature and pressure relief valve
(when required) are factory fitted.

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2. Technical specifications
Model Number Hot Spring 90 125 150 170 200 250 300
Storage capacity in litres 90 125 150 170 200 250 300
Overall diameter in mm 550 550 550 550 550 550 550
Overall including immersion heater in mm 605 605 605 605 605 605 605
Overall height in mm 977 1202 1327 1477 1677 1977 2287
Weight when full in kg 120 159 188 212 246 299 353
Primary flow/return connections in mm 22 22 22 22 22 22 22
Cold feed/hot draw off connections in mm 22 22 22 22 22 22 28
Maximum water supply pressure in bar 12 12 12 12 12 12 12
System operating pressure (pre-set) in bar 3 3 3 3 3 3 3
Expansion vessel charge pressure in bar 3 3 3 3 3 3 3
Expansion relief valve set pressure in bar 6 6 6 6 6 6 6
Temperature and pressure relief valve set
Lift pressure in bar 7 7 7 7 7 7 7
Lift temperature in degrees centigrade 90 90 90 90 90 90 90
Maximum primary working pressure in bar 3 3 3 3 3 3 3
Performance:
Hot water generation time in minutes from 26 36 37 36 33 35 40
15 to 65 degrees C for ‘Indirect’ cylinder
Hot water generation time in minutes from 52 72 86 98 108 144 202
15 to 65 degrees C for ‘Direct’ cylinder
Regeneration time in minutes for 70% of 18 25 26 25 24 25 29
Contents for ‘Indirect’ cylinder
Regeneration time in minutes for 70% of 27 37 45 51 63 75 136
Contents for ‘Direct’ cylinder
3. Check list
Cylinder/expansion vessel assembly 90 ltr 1 - - - - - -
Cylinder/expansion vessel assembly 125 ltr - 1 - - - - -
Cylinder/expansion vessel assembly 150 ltr - - 1 - - - -
Cylinder/expansion vessel assembly 170 ltr - - - 1 - - -
Cylinder/expansion vessel assembly 200 ltr - - - - 1 - -
Cylinder assembly 250 ltr - - - - - 1 -
Cylinder assembly 300 ltr - - - - - - 1
Expansion vessel 24 ltr, part No - - - - - 1 1
Pressure reducing valve, part No 1 1 1 1 1 1 1
Expansion relief valve, part No 1 1 1 1 1 1 1
T/P valve, pre fitted, part No 1 1 1 1 1 1 1
15/22 Tundish, part No 1 1 1 1 1 1 1
22mm motorised valve, part No 1 1 1 1 1 1 1
Control/limit thermostat, part No 1 1 1 1 1 1 1
Immersion heater pre fitted, part No 1(2) 1(2) 1(2) 1(2) 1(2) 1(2) 1(2)
* Direct cylinder quantity in brackets.

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4. General requirements
4.1.The Quantum “Hot Spring” domestic hot water cylinder MUST be installed by a
competent person in accordance with section G3 of the current Building Regulations.
4.2. Important - It is important that the installer reads and understands these instructions,
unpacks and familiarises themselves with the equipment before commencing the installation.
Failure to observe these installation instructions could invalidate the warranty.
4.3. Water supply - The warranty requires that the water to be heated be of drinking water
quality and that if water treatment equipment is installed, it must function correctly.
The unit, where possible should be fed via a 22 mm diameter supply pipe. It requires a supply
pressure of 1.5 bar with a flow rate of at least 20 litres per minute as a minimum for it to
function. Even with these rates, flow from the outlets will be disappointing if several outlets are
used simultaneously. Generally speaking, the higher the supply pressure, the better the system
will function. The cylinder control equipment is factory set to limit the system operating pressure
to 3 bar. The maximum supply pressure into the pressure-reducing valve is 12 bar.
4.4. Taps and fittings -All taps and fittings incorporated in the unvented system should have a
rated operating pressure of 7 bar or above.
4.5. Location –The unit is designed to be floor standing, vertically mounted, indoors, in a frost-
free environment. When choosing a suitable location for the cylinder, consideration should be
given to the routing of the discharge pipe to a convenient point and also the availability of an
adequate power supply for connecting the immersion heater(s).
The cylinder may stand on any flat and level surface without any special foundation
preparations, provided that it is sufficiently robust to support the full weight of the cylinder. (See
Technical specifications for weights)
The position of the cylinder should be such that easy access is provided for servicing the controls
and replacing the immersion heater should the need arise.
Generally, pipe runs should be made as short as possible and lagged to prevent heat loss.
4.6. Storage and handling –If the cylinder is not being installed immediately, it should remain
in its carton with all pipe end protective caps in situ to to prevent damage. We recommend that
the cylinder be transported to its installation position on a sack truck or similar with the outer
carton in place.
4.7. Pipework connections –All Pipework connections to the cylinder MUST be made in
accordance with Fig 1.

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Pipework connections.
Fig 1
KEY
ITEM
DESCRIPTION
A
TEMPERAURE AND PRESSURE
RELIEF VALVE
B
HOT WATER
C
HEATING WATER RETURN
D
THERMOSTAT POCKET
E
COLD WATER
F
IMMERSION HEATER
G
HEATING WATER FLOW

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5. Primary circuit installation
5.1. The Quantum “Hot Spring” cylinder is suitable connecting to most fully pumped domestic
gas or oil fired central heating boilers working on an open vented or sealed system having a
maximum working pressure of 3 bar and a maximum working temperature of 90 degrees
centigrade. If you are in any doubt concerning the suitability of the boiler, consult the boiler
manufacturer. Solid fuel or wood burning boilers MUST NOT be used on unvented hot water
systems. Gravity circulation should also be avoided.
5.2. Systems - For the best results we recommend that the Quantum “Hot Spring” cylinder be
connected to a Honeywell “W”plan type system that gives priority to domestic hot water
(DHW) production. (See Fig 2) This particular system allows all the boiler’s energy to go into
satisfying the hot water demand before switching over on to central heating duty.
If an existing system is a “flow share” arrangement such as a Honeywell “S” or “Y” plan type
system, (see Figs 3 and 4) they will also provide satisfactory results, but during central heating
demands, hot water production will not be as responsive.
5.3. Connections -The primary flow and return connections should be made in accordance with
Fig 1 using 22mm compression fittings, (not supplied).
5.4. The 2 port valve -To prevent gravity circulation when the boiler switches off, the 2 port
motorised valve supplied with the unvented hot water kit MUST be fitted in the primary flow
pipe to the cylinder and wired in accordance with Figs 2,3,or 4 (depending on system design), to
comply with current legislation.
5.5. Hard water areas –If the cylinder is to be used in a hard water area, we recommend that
the primary flow temperature be limited to 75 degrees centigrade. This will help reduce the
migration of suspended solids in the water and help prevent the build up of lime scale.

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“W” Plan wiring layout and system schematic.

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Fig 2
“Y” Plan wiring layout and system schematic.

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Fig 3
“S” Plan wiring layout and system schematic.
Fig 4

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6. Secondary circuit installation.
6.1. - Connections. Secondary circuit connections MUST be made to the cylinder in accordance
with Fig 1.and Fig 5. A drain cock (not supplied) should be fitted in the position shown in Fig 5
to facilitate draining of the cylinder.
6.2. - Cold water supply –Where possible, for best results, the cylinder should be fed by an
uninterrupted 22mm supply pipe into the pressure reducing valve (PRV) with a supply pressure
of between 3 and 12 bar maximum. In the UK supply pressures this high are not always
available. However the system will still work satisfactorily with pressures below this. The
cylinder should not be used on any system with a supply pressure below 1.5 bar and a flow rate
of less than 20 litres per minute.
6.3. - Temperature and pressure relief valve –The temperature and pressure relief valve
(T/PV) is supplied factory fitted to the cylinder. This connection MUST NOT serve any other
purpose nor have any other valve or obstruction fitted between it and the cylinder. The valve is
pre calibrated to lift at 7 bar or 90 degrees centigrade and any attempt to adjust it will invalidate
the warranty.
6.4. -Expansion vessel –A 20 litre expansion vessel with a pre-charge pressure of 3 bar is fitted
at the factory to all cylinders with storage volumes up to and including 200 litres. For cylinders
of 250 and 300 litres capacity, a separate 24-litre expansion vessel is supplied which MUST be
connected into the cold water supply side between the expansion relief valve and the cylinder.
The expansion vessel MUST be positioned with the entry point at the bottom.
IMPORTANT: Regular checks must be carried out to ensure that the expansion vessel is
correctly pressurised to 3 bar at all times.
6.5. -Pressure reducing valve –Taking due account of the directional arrow, fit the pressure
reducing valve (PRV) in accordance with Fig 5. This can be connected to a supply pressure of
between 1.5 and 12 bar maximum.
6.6. - Expansion relief valve –Fit the expansion relief valve (ERV) in accordance with Fig 5.
This valve has been pre-set to lift at 6 bar. No other valve should be fitted between the expansion
relief valve and the cylinder.
6.7. - Check valve –Taking due account of the directional arrow, fit the check valve (CV) in
accordance with Fig 5.
6.8. -Secondary circulation –If the installation requires a secondary circulation circuit, a
15mm return leg, which incorporates a check valve should be connected via the cold feed using a
22 x 22 x 15 swept tee.
IMPORTANT: If a secondary circulation circuit is installed then a larger expansion vessel may
be required to handle the increase in volume.
6.9.- Tundish –The tundish must not be positioned above or in close proximity of any electrical
current carrying devices or wiring.

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Secondary circuit arrangement
Fig 5
1
MAINS COLD WATER SUPPLY
2
STOP COCK (NOT SUPPLIED)
3
PRESSURE REDUCING VALVE –SET 3 BAR
4
CHECK VALVE
5
EXPANSION RELIEF VALVE - SET 6 BAR
6
DISCHARGE PIPE 22mm DIA (SEE SECTION 7)
7
DRAIN COCK
8
IMMERSION HEATER 230v –3 Kw –50 Hz
9
COLD WATER INLET CONNECTION –22mm DIA
10
PRIMARY FLOW CONNECTION –22mm DIA
11
CONTROL THERMOSTAT SENSOR POCKET
12
PRIMARY RETURN CONNECTION –22mm DIA
13
TUNDISH 15 TO 22mm
14
TEMPERATURE AND PRESSURE RELIEF VALVE. SET 7 BAR / 90C
15
HOT WATER OUTLET –22mm DIA

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7. Discharge arrangement.
Tundishes must be installed in a position so that they are clearly visible by the user. In addition,
the discharge pipe from the Tundish should terminate in a safe place where there is no risk to
persons in the vicinity of the discharge, be of metal and:
(a) Be at least one pipe size larger than the normal outlet size of the safety device unless its total
equipment hydraulic resistance exceeds that of a straight pipe 9 m long, i.e. discharge pipes
between 9 m and 18 m equivalent resistance length should be at least two sizes larger then the
normal outlet size of the safety device, between 18 m and 27 m at least three sizes larger and so
on. Bends must be taken into account in calculating the flow resistance. Refer to the diagram,
tables and worked example detailed in Fig 6.
(b) Have a vertical section of pipe at least 300 mm long below the Tundish before any elbows or
bends in the Pipework.
(c) Be installed with a continuous fall
(d) Have discharges visible at both Tundish and the final point of discharge, but where this is not
possible or practically difficult, examples of acceptable discharge arrangements are:
-Ideally below a fixed grating and above the water seal in a trapped gully
-Downward discharge at low level, i.e. up to 100 mm above external surfaces such as
car parks, hard standings, grassed areas, etc. are acceptable providing that where
children play or otherwise come into contact with discharges, a wire cage or similar
guard is positioned to prevent contact whilst maintaining visibility.
-Discharge at high level, e.g. into a metal hopper and metal down pipe with the end of
the discharge pipe clearly visible (Tundish visible or not) or onto a roof capable of
withstanding high temperature discharges of water and 3 m from any plastic guttering
system that would collect such discharges (Tundish visible).
-Where a single pipe serves a number of discharges such as in blocks of flats, the
number served should be limited to not more than six systems so that any installation
discharging can be traced reasonably easily. The single common discharge pipe
should be at least one pipe size larger than the largest individual discharge pipe to be
connected. If unvented hot water stored systems are installed where discharges from
safety devices may not be apparent i.e. in dwellings occupied by blind, or disabled
people, consideration should be given to the installation of an electrically operated
device to warn when discharge takes place.
Warning Notice –The discharge will consist of scalding water and steam. Asphalt, roofing felt
and non-metallic rainwater goods may be damaged by such discharges.

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Typical discharge pipe arrangement.
Fig 6

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Sizing of copper discharge pipe “D2” for common temperature relief valve outlet sizes
Valve outlet Min size of Min size of Max resistance Resistance
size, diameter discharge pipe discharge pipe allowed, expressed created by
in ‘inches’ D1 in ‘mm’ D2 from tundish as a length of each elbow
in ‘mm’ straight pipe, i.e. or bend in
no elbows or ‘m’
bends.
22 up to 9 0.8
1/2 15 28 up to 18 1.0
35 up to 27 1.4
___________________________________________________________________________
28 up to 9 ----
3/4 22 35 up to 18 ----
42 up to 27 1.7
35 up to 9 1.4
1 28 42 up to 18 1.7
54 up to 27 2.3
___________________________________________________________________________
Worked example
The example below is for a ½”diameter temperature relief valve with a discharge pipe (D2)
having 4 No elbows and a length of 7 m from the tundish to the point of discharge.
From
Maximum resistance allowed for a straight length of 22mm copper discharge pipe (D2) from a
½”diameter temperature relief valve is: 9.0 m.
Subtract the resistance for 4 No 22mm elbows at 0.8 m each = 3.2 m.
Therefore, the maximum permitted length equates to: 5.8 m.
5.8 m is less than the actual length of 7 m, therefore, calculate the next largest size.
Maximum resistance allowed for a straight length of 28mm pipe (D2) from a ½”diameter
temperature relief valve equates to: 18 m.
Subtract the resistance for 4 No 28mm elbows at 1.0 each = 4 m.
Therefore the maximum permitted length equates to 14 m.
As the actual length is 7 m, a 28mm diameter copper pipe will be satisfactory.

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8. Electrical installation
WARNING: THIS EQUIPMENT MUST BE EARTHED.
All electrical wiring must be carried out by a competent person and in accordance with the
current I.E.E. Wiring Regulations. A suitable “Earthing” point is provided on the cylinder
pedestal directly below the immersion heater(see Fig 1)
The control equipment supplied will ensure that the cylinder functions safely. From an economic
and convenience point of view, it is intended that these controls operate in conjunction with
other control packages for example Honeywell “S”,“W” or “Y” plan systems, which incorporate
a programmable time clock etc.
8.1.The immersion heater-A 3kW 230v 50Hz immersion heater is pre fitted to the cylinder at
the factory. It should be wired in accordance with the instructions given in Fig 7. The cable
MUST be routed through the strain relief bush. We recommend that the control thermostat is set
at 60 C, the high limit trip is factory set at 85 C. The immersion heater conforms with EEC
Directive 76/889 for radio interference and complies with BS 800:1977.
WARNING: Never fit an immersion heater without a thermal cut-out.
8.2.The indirect temperature controller-The control and high limit thermostat for use with
indirect systems is supplied separately with the unvented hot water safety kit. It should be fitted
into the sensor pocket in the cylinder (see Fig 1 for position). The control thermostat has an
adjustment range between 30 C and 90 C, however it is recommended this it be set to 60 C
WARNING: The manual re-set high limit thermostat MUST NOT under any circumstances be
bypassed. This is pre-set to 80 C and to prevent nuisance tripping the control thermostat should
always be at least 15 C below this.
8.3. The 2 port valve -To prevent gravity circulation when the boiler switches off, the 2 port
motorised valve supplied with the unvented hot water kit MUST be fitted in the primary flow
pipe to the cylinder and wired in accordance with Figs 2,3,or 4 (depending on system design), to
comply with current legislation.

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Immersion heater installation and wiring instructions
a) Ensure the mains voltage corresponds to the voltage rating of the immersion heater as shown
on the rating label on the terminal cover.
b) Install the immersion heater into the domestic hot water cylinder using the gasket provided.
Use a shaped spanner, Stillsons should not be used. The use of sealing compound is not
recommended.
c) Wire the immersion heater in accordance with the wiring diagram below. It should be wired
through a double pole isolator switch or controller, having contact separation of at least 3
mm, using 1.5mm sq. flexible cable, 85 deg C rubber insulated HOFR sheathed, to comply
with BS 6141 table 8 and must be fully earthed.
d) The BEAB approval certification on this immersion heater only applies if rod type
thermostats, types Sunvic VKL or Cotherm SHD are used. The temperature setting of the
control thermostat must not exceed 60 deg C.
e) In the event of the manual reset cut-out operating, isolate the immersion heater from the
mains supply, investigate and identify the cause of the operation of this cut-out, rectify the
fault before manually resetting the cut-out via the reset button on the cut-out. Finally switch
the mains electricity supply back on.
Fig 7
WARNING: THIS APPLIANCE MUST BE EARTHED.

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9. Filling and commissioning-
9.1.Check that the expansion vessel charge pressure is 3 bar.
9.2.Check that all connections are made tight including the immersion heater.
9.3.Open the main stopcock and fill the secondary system first. Open successive taps (hot and
cold) starting with the tap furthest from the cylinder. Leave each tap open for a few moments to
allow all air and possibly debris from the system to exit. Manually lift (by rotating the knob)
both the expansion relief (EV) and the temperature and pressure relief valve (TPV) for a short
period to remove trapped air from behind the valve seating and to prove the correct function of
the discharge arrangement.
9.4. Check all joints for leaks, rectify as necessary.
9.5. Check that the control and high limit settings for the indirect system and the immersion
heater are as required.
9.6. Fill the primary side, (note:- it will be necessary to manually open the 2 port valve whilst
filling the system, this is achieved by moving the lever on the valve head sideways). Check for
leaks and rectify as necessary. Vent all heat emitters of air and, following the manufacturers
lighting instructions, ignite the boiler.
9.7. Check that while the cylinder is heating up, no water issues from either the expansion relief
or the temperature and pressure relief valve and, when the cylinder reaches temperature, that the
2 port valve closes.

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10.Servicing and maintenance.
10.1. Servicing and maintenance must only be carried out by a competent unvented hot water
installer or by Quantum Heating Limited authorised personnel.
10.2. Before any work whatsoever is carried out on the installation, it MUST first be isolated
from the mains electricity supply.
10.3. WARNING: both the primary and secondary systems will contain very hot water that will
scald, therefore care should be taken when opening any joints, seals or valves.
10.4. Only use spare parts authorised by Quantum Heating Limited. The use of unscheduled
spare parts will invalidate the warranty.
10.5. Drain the cylinder –When draining the cylinder, always switch off the boiler and the
immersion heater first. Turn off the water supply at the stopcock (see Fig 5). Connect a hose pipe
to the drain cock (see Fig 5) and route it to a convenient gulley. Open the drain cock and all hot
taps that are served by the cylinder. The cylinder may take several minutes to empty completely.
10.6. In hard water areas it may be necessary from time to time to remove and de-scale the
immersion heater element. Replace the gasket each time it is removed.
10.7. Remove the cartridge from the pressure reducing valve (PRV). Check the strainer and if
necessary remove any debris from in front of it. Replace the cartridge.
10.8 .Check the charge pressure in the expansion vessel and top up as necessary. The charge
pressure should be 3.0 bar.
10.9. Whilst the hose pipe is connected, the drain cock open and with the immersion heater
removed, the cylinder may be flushed out to remove any debris, sand or lime scale particles that
may have collected in the bottom by using a further hose pipe connected to the cold water main.
10.10. Close the drain cock, disconnect the hose, refit the immersion heater and close all hot
water taps before reopening the stopcock. Allow the cylinder time to fill whilst checking for any
leaks. Release any air from the system by opening each hot water tap individually, starting with
the one furthest from the cylinder.
10.11. Manually lift the expansion relief and temperature and pressure relief valve one at a time,
every 12 months (more frequently in hard water areas) to prevent debris from building up behind
the valve seat. Whilst carrying out this operation, check that the discharge to waste is
unobstructed. Check that each valve seals correctly when released. As the valves are pre-
calibrated, they require no further maintenance.
10.12. Finally switch on the mains electricity supply to the immersion heater and the boiler. As
the system heats up, check again for any leaks and rectify as necessary.

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11. Fault finding.
Notice: Disconnect electrical supply before removing any electrical equipment cover.
Fault Possible cause Remedy
No hot water 1. Mains supply off 1. Open stopcock
2. Strainer blocked 2. Turn water supply off,
remove strainer and
clean. (see 10.6)
3. Pressure reducing valve 3. Re-fit correctly
(PRV) incorrectly fitted
Water from hot taps is cold 1. Programmer set to heating 1. Set programmer to call
only or not switched on for hot water
2. Central heating boiler 2. Check boiler operation
malfunction if faulty consult your
boiler manufacturers
instructions
3. High limit thermostat has 3. Check and re-set
tripped
4. Motorised valve malfunction 4. Check wiring and/or
plumbing connections
to motorised valve
Intermittent water discharge 1. Expansion vessel has lost its 1. Turn off stopcock
charge pressure open a hot water tap
check vessel charge
pressure and recharge
to 3 bar
Continuous water discharge 1. Pressure reducing valve (PRV) 1. Check pressure from
working PRV if greater than
3 bar replace cartridge
2. Expansion relief valve not 2. Manually lift the valve
seating correctly once or twice to clear
any debris from the seat
otherwise replace valve
3. Temperature and pressure 3. Same remedy as above
relief valve not seating correctly

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12. Users instructions.
12.1 Your Quantum “Hot Spring” unvented hot water cylinder has been deigned to give many
years of trouble free service and is made from hygienic high grade stainless steel. It includes a 3
kW electric immersion heater for times when your central heating is switched off, during the
summer for instance.
12.2. The flow temperature of the hot water can be set to your requirements on the immersion
heater up to 60 deg C and the indirect side thermostat up to 65 deg C. These temperatures should
not be set any higher otherwise nuisance tripping of the high limit thermostat will occur. If you
are in any doubt, these adjustments should be best left to a qualified electrician
12.3. When a hot tap is turned on there may be a short surge of water, this is quite normal with
unvented systems and does not mean there is a fault.
12.4. When you first fill a basin the water may sometimes appear milky. This is due to very tiny
air bubbles in the water which will clear very quickly.
12.5. WARNING: If water issues from the temperature and pressure relief valve (TPV) or from
the expansion relief valve (EV) seek expert advice immediately.
13. Warranty
13.1.Quantum Heating Limited guarantee all electrical and mechanical controls supplied with
the cylinder for a period of 2 years from the date of purchase provided that they have been
installed for their intended use by a competent person and have not been modified in any way.
13.2. In addition Quantum Heating Limited also guarantees the stainless steel hot water cylinder
for a period of 25 years from the date of purchase against faulty material or manufacture
provided that :
(a) It has been installed by a competent person in accordance with this installation manual
and all current regulations and codes of practice at the time of installation.
(b) It has been used solely for the purpose of heating potable water that complies with
current (at the time of installation) EU standards and is not fed with water from a private
source.
(c) It has not been modified in any way.
(d) It has not been subjected to excessive pressure or electrolytic action from dissimilar
materials, or attack from any salt deposits.
(e) It has been installed indoors in a frost-free environment.
(f) The warranty card is completed and returned to Quantum Heating Limited within 30 days
of installation.
This warranty is not transferable. This warranty does not include claims due to frost or lime scale
damage. Proof of purchase will be required against any claim. This guarantee does not affect
your statutory rights.
Quantum Heating Limited: Helmn Way, Whitewalls Industrial Estate, Nelson, Lancashire, BB9 8SY.
Tel [phone] Fax [phone]