Product Features
Boiler Sequence
Boiler Control Instruction & Operation Manual
Page 5 of 68
Boiler
“Priority”
Figure 4: Home Screen Details
The Control accepts a call for heat (demand) from multiple places and responds according to the
“Priority.”
When more than 1 demand is present the higher priority demand is used to determine active boiler
settings. For example, when Domestic Hot Water (DHW) has priority the setpoint,
“Diff Above”, “Diff
Below
” and pump settings are taken from DHW selections. Active “Priority” is displayed on the “Home”
screen above. Priority Order is shown in Table 2.
Table 2: Order of Priority
Priority
Display
Boiler Responding to:
1st
Sequencer Control
The boiler is connected to the peer- to-peer network. The boiler accepts
demand from the Sequencer Master.
2nd Domestic Hot Water
DHW call for heat is on and selected as the priority demand. DHW is
always higher priority than Central Heat. It also has higher priority than the
Sequencer Control when DHW priority is
“enabled” and “Boiler Piped” IWH
is selected.
3rd
Central Heat
Central Heat call for heat is on and there is no DHW demand or DHW
priority time has expired.
4th
Frost Protection
Frost Protection is active and there is no other call for heat. Frost protection
will be a higher priority than Sequencer Control if the Sequence Master has
no active call for heat.
5th
Warm Weather
Shutdown (WWSD)
WWSD is active and the boiler will not respond to central heat demands.
DHW demand is not blocked by WWSD.
