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5.Time clock
This allows the HeatMaster
®
to be timed on and off and operates on
a 24 hour sequence. Around the outside of the clock there are a
number of white tabs, these allow 15 minute switching periods. To
set the time clock simply push outwards the number of tabs required
for ON period.
Remember: TAB IN = HeatMaster OFF
TAB OUT = HeatMaster ON
6.Temperature and pressure gauge
This gauge indicates both the temperature of the HeatMaster
®
and
the pressure within the primary circuit.
The temperature should not exceed 90°C - if it does, switch the
boiler off and check the thermostat setting. If the fault persists, call
an engineer.
The pressure should not fall below 1bar, if it does the please see the
'Heating System Pressure' paragraph later in this section.
7. Low primary water pressure indicator
If this indicator lights up, the primary circuit of the HeatMaster
®
requires topping up with water. Please see the 'Heating System
Pressure' paragraph later in this section.
Heating-system pressure
The heating circuit may require a top-up of water. The pressure
gauge, located beside the display, gives the pressure.
In the case of repeated fills, contact your installer.
The pressure of the primary circuit must be at least 1 bar and must
be regularly checked by the end user. If the pressure falls below
0.5 bar, the low-water-level pressure switch locks the appliance until
the pressure in the system returns to above 0.8 bar.
The HeatMaster
®
200 N / 200 F is fitted with a purpose-designed fill
set (see Fig. A and B). Always make sure that the appliance is
switched off when filling the system.
To do this, turn the On/Off switch on the left of the control panel to
Off.
For more information, please ask your installer when delivering the
system.
The appliance is fitted with a safety valve. If the system pressure
exceeds 3 bars, this valve opens and drains the water from the
system. In this case, contact your installer.
3
USER GUIDE DESCRIPTION
OPERATING PRINCIPLE
The HeatMaster
®
is a high performance, direct fired hot water
storage heater, which has indirect heat transfer due to its Tank-in-
Tank construction.
At the heart of the HeatMaster
®
is a stainless steel cylinder through
which the flue tubes pass. This is surrounded by a mild steel shell
containing the primary water (neutral fluid).The outer shell extends
down to the combustion chamber and even around the flue tubes.
The area of the heat transfer surface is therefore much greater than
that of standard direct fired water heaters.
A circulating pump fitted to the primary circuit moves the water
around the tank, heating it faster and maintaining an even
temperature across the primary jacket.
The burner, either gas or oil, fires onto the primary water which
indirectly heats the stainless steel cylinder containing the DHW. As
with all Tank-in-Tanks, this is corrugated over its full height and
suspended in the HeatMaster
®
by its hot and cold water
connections.
The cylinder expands and contracts during use and this, together
with the fact that cold water does not come into contact with the
intense heat of the burner flame, means that limescale buildup is
prevented.
This scale resistant feature, along with the corrosion resistance of
stainless steel, eliminates the need for sacrifical anodes.
The HeatMaster
®
has one very major advantage over other direct
fired water heaters - because it heats the DHW with a primary
circuit, this primary water can be used to provide central heating as
well.
By connecting two, three, four or more HeatMaster
®
together in a
module, most hot water and heating demands can be met.
Indeed, when used in conjunction with HR and Jumbo hot water
storage tanks the HeatMaster can supply even the largest hot water
requirement.
Standard equipment
The HeatMaster 200 has the following items as standard:
- On/off switch
- Summer/Winter switch
- Control thermostat (60 - 90°C)
- Thermal reset high-limit thermostat (95°C)
- Manual reset high-limit thermostat
- Hot water priority thermostat
- Primary circulating shunt pump
- Primary expansion vessels
- Primary safety valve
- Pressure and temperature gauge
- Drain valve
- Body completely insulated in rigid polyurethane foam
PACKING
The HeatMaster is delivered in separate packages.
• Package No. 1: Foam-insulated body, hydraulic accessories,
and control panel.
• Package No. 2: Chimney reducing pipe.
• Package No. 3: Wooden protective casing (jacket and
accessory).
• Package No. 4: “RIELLO” RG4S 396 T1 burner
(HM 200 F only).
Fig. A
(cover)
Fig. B
(rear panel)