38
A. CONTROL OVERVIEW
The
P
URE
F
IRE
®
boiler control is one of the primary safety
devices for the boiler. It controls the ignition sequence,
temperature limits, circulators and gas flow to the boiler. It
also provides many unique features.
The control provides 8 central heating modes and 3
domestic hot water modes. To provide maximum
flexibility, several special features are also included.
1.
Central Heating (CH) Modes:
The
P
URE
F
IRE
®
boiler control allows the installer to
choose from several different central heating modes.
The following table shows the central heating modes. In
addition, the table shows the display text associated with
each CH mode and a brief description of the operation.
2.
Domestic Hot Water (DHW) Modes:
The
P
URE
F
IRE
®
boiler control also allows the installer
to choose from three different DHW modes.
BOILER CONTROL: INTERNAL WIRING & OPERATION
Table 8.1: Central Heating (CH) Modes
8. BOILER CONTROL: INTERNAL
WIRING & OPERATION
Central Heating Mode
Description
Restrictions
0 (Indoor Thermostat)
Fixed Setpoint
Not for space heating
1 (Thermostat and Outdoor Reset)
Outdoor Reset
No restrictions
2 (Permanent Demand and Outdoor Reset)
Outdoor Reset
No restrictions
3 (Permanent Demand and Setpoint)
Fixed Setpoint
Not for space heating
4 (Analog 0-10 VDC Input – Setpoint)
Analog Input
External Energy
Management System
5 (Analog 0-10 VDC Input – Modulation Rate)
Analog Input
6 (Hydro-Air Unit)
Fixed Setpoint
Not for space heating
7 (Internal Reset) Default *
Internal Reset
No restrictions
Table 8.2: Domestic Hot Water (DHW) Modes
Domestic Hot Water Mode
Description
0 (No DHW)
No DHW tank is used.
1 (DHW Tank with sensor)
The domestic water tank is equipped with a temperature sensor. The
P
URE
F
IRE
®
control modulates the boiler
firing rate based on tank temperature
2 (DHW Tank with thermostat)
The domestic water tank is equipped with a thermostat. The
P
URE
F
IRE
®
control responds to the demand from
the thermostat and modulates the boiler firing rate targeting the DHW boiler setpoint. If no domestic hot water
tank is connected, this feature will not function.
Table 8.3: Pump Modes
Pump
Mode
Display Text
Brief Description
0
DHW or CH & DHW pump
The General pump is always on when the burner is on. The CH pump runs on CH
demand. The DHW pump runs on DHW demand. Either the CH or DHW pump runs;
they never run at the same time
1
General pump with 3-way valve
The General pump is always on when burner is on. A line voltage (120 VAC) 3-way
valve is operated to supply water to the DHW tank.
2
Manifold with pump for DHW
This mode is not used for most operations. Consult factory if needed.
Summary of Contents for PureFire PF-110
Page 77: ...75 REPAIR PARTS Figure 13 3 General Repair Parts PF 200 PF 210 PF 300 PF 399 ...
Page 82: ...80 APPENDIX A STATUS SCREENS APPENDIX A STATUS SCREENS ...
Page 83: ...81 APPENDIX A STATUS SCREENS ...
Page 84: ...82 APPENDIX A STATUS SCREENS ...
Page 85: ...83 APPENDIX A STATUS SCREENS ...
Page 86: ...84 APPENDIX B USER MENU APPENDIX B USER MENU ...
Page 87: ...85 APPENDIX C INSTALLER MENU APPENDIX C INSTALLER MENU ...
Page 88: ...86 APPENDIX C INSTALLER MENU ...
Page 89: ...87 APPENDIX C INSTALLER MENU ...
Page 90: ...88 APPENDIX C INSTALLER MENU ...
Page 91: ...89 APPENDIX C INSTALLER MENU ...