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Peerless®PUREFIRE ®PFA-1 Interface Adapter
Installation, Operation and Maintenance Manual
A. OVERVIEW
The PFA-1 Interface Adapter is designed to allow for
electronic interface between the PureFire®main control
and other electronic devices.
1. Alarm Output:
In the event of a blocking or locking error, the PFA-1
Interface adapter will provide a contact closure to signal
an external device (alarm bell, phone dialer, etc.) of a
problem.
2. Analog Input:
The PFA-1 Interface Adapter will accept an analog input
of 0-10VDC. This analog signal can be used to control
Setpoint Temperature or Gas Input Rate. This signal is
required per cascade system to control the System
Setpoint. If Analog control of Gas Input is required, one
InterFace Adapter is required per boiler.
3. Modbus Interface:
The PFA-1 Interface Adapter allows external access to
equipped with a PFA-1 Interface Control to allow full
a. Temperatures: Supply, Return, DHW and Vent
(cascade) system can be accessed.
b. : The boiler status can be monitored to
water (DHW) demand.
c. : If the boiler is in a lockout or blocking
error, the interface will allow access to the error code.
B. PRE-INSTALLATION
1. PF-200, PF-210, PF-300, and PF-399 boilers come
equipped with pre-wired harnesses to connect to the
PFA-1 Interface Adapter. If modbus is required, two
as shown below.
2. To connect to the PF-50, PF-80, PF-110 or PF-140 boilers,
harnesses (supplied with the PFA-1 Interface Adapter)
are required.
3. For stand alone boilers, one PFA-1 Interface Adapter is
one PFA-1 Interface Adapter will provide Alarm
required, an interface unit is required for each of them.
the PureFire®boiler jacket. This manual will provide
C. INSTALLATION
PFA-1 Interface Adapter on the PF-50, PF-80, PF-110 and
PF-140 boilers.
• These boilers require a PFA-1 Harness Adapter Kit
(provided) to connect to the boiler.
PFA-1 Interface Adapter on the PF-200, PF-210, PF-300,
and PF-399 boilers.
• These boilers come with pre-wired harnesses for
connected as shown below.
backed Velcro provided with the kit.
PFA-1
1"
11/16"
1 1/2"
6"
INSIDE VIEW:
LEFT SIDE PANEL
Figure 1
2"
6"
2 1/2"
I
NSIDE VIEW:
LEFT SIDE OF BASE PANEL
Figure 2
