USER GUIDE
USING THE BOILER
Your system should be serviced at least once a year by a qualified engineer.
If the boiler is subject to heavy use, it may require servicing more than once a year - consult your service engineer for advice.
Starting the burner:
In normal operation, the burner starts automatically whenever the boiler temperature falls below the set temperature.
Understanding the control panel
There are no user parts inside the control panel.
1. On/Off switch
This turns the HeatMaster on or off.
2. Control thermostat - 60 to 90 °C
Control panel HeatMaster 60 N
Combined temperature | Manual reset high | |
and pressure gauge | limit thermostat | |
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lockout | Time clock |
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Primary circuit low |
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water pressure |
| Control | ON / OFF |
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indicator |
| thermostat | switch |
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High limit cutoff |
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Control panel HeatMaster 70 N and HeatMaster 100 N
When using the HeatMaster as a hot water generator only, the temperature can be set between 60 °C and 90 °C.
If the HeatMaster is used for both hot water and central heating, the control thermostat would normally be set at 80 °C to achieve optimum operating conditions.
3. Summer/Winter switch
This turns the heating pump (if fitted) on or off.
4. Manual reset high limit thermostat
If the boiler temperature exceeds 103 °C this safety device will activate and the high temperature indicator will light up. To reset - first allow the boiler to cool to below 60 °C, unscrew the cap and press the reset button using a pencil or similar pointed device, replace the cap. If the fault persists, turn the boiler off and call an engineer.
5. Time clock
Combined temperature and pressure gauge
Burner lockout indicator
Primary circuit low water pressure indicator
High limit cutoff indicator
Manual reset high limit thermostat
Summer / Winter switch
Time clock |
Control | ON / OFF |
thermostat | switch |
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
Control panel HeatMaster 150 Jumbo
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.
Combined temperature and pressure gauge
Relay base
Time clock
Fuse
Control thermostat
Servicing socket
(230 V ˜ 50 Hz)
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Mains power electrical connection
Primary circuit low
barwater pressure indicator
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ON / OFF switch
Manual reset high limit thermostat
Thermal reset high limit thermostat
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