Boiler Parameter Worksheet
Appendix
45
Delta temperature formula
When a temperature is used as a delta temperature (for instance the night setback) it is calculated as follows:
I) Temperature [°C] = (night setback ÷ 2)
II) Temperature [°F] = Temperature [°C] × 1.8
3.0.2
Boiler State
The operation of the boiler is described by the following table of state values.
State
(decimal)
State
(Hexadecimal) State Name
Description
0
0x00
RESET_0
Resetting
1
0x01
RESET_1
Resetting
2
0x02
STANDBY_0
Standby, waiting for demand
3
0x03
SAFETY_ON
Relay circuit check
4
0x04
SAFETY_OFF
Relay circuit check
5
0x05
PRE_PURGE
Pre purging
6
0x06
PRE_PURGE_1
Pre purging
7
0x07
IGNIT_0
Pre ignition with gas valve closed
8
0x08
IGNIT_1
Ignition with gas valve open
9
0x09
BURN_0
Burning
10
0x0A
POST_PURGE_0
Post purging burner
11
0x0B
POST_PURGE_1
Post purging burner
12
0x0C
PUMP_CH_0
Post pumping for CH
13
0x0D
PUMP_CH_1
Pumping for CH
14
0x0E
PUMP_HW_0
Post pumping for DHW
15
0x0F
PUMP_HW_1
Pumping for DHW
16
0x10
ALARM_1
Error handling (locking)
17
0x11
ERROR_CHECK
Error Handling (blocking)
18
0x12
BURNER_BOOT
Restarting burner control
19
0x13
CLEAR_E2PROM_ERROR
Error handing
20
0x14
STORE_BLOCK_ERROR
Error handling
21
0x15
WAIT_A_SECOND
Error handling
3.0.3
Information Byte
Every bit in the byte is a flag. When the flag is 1 it means closed/running when it is 0 it means
Open/stopped.
In the following table you can find the bit number of the flag.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
High Gas
Pressure
Air Damper
DHW Pump CH Pump
Blocked
Flue
Air
Pressure
Low Gas
Pressure
Water
Level
3.0.4
Sequence Byte
The following table details the sequence byte. This byte consists of the state of the boiler and operation mode of the
boiler, both at the time of the error.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
1 = CH
Mode
1 = DHW
Mode
1 = Frost
Protect
state
state
state
state
state
