PEERLESS PUREFIRE PFW-199, Installation, Operation & Maintenance Manual

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APPENDIX D. 852-1 INTERFACE ADAPTER
APPENDIX D. 852-1 INTERFACE ADAPTER
A. OVERVIEW
The 852-1 Interface Adapter is designed to allow for
electronic interface between the Infinite Energy main
control and other electronic devices.
1. Alarm Output:
In the event of a blocking or locking error, the 852-1
Interface adapter will provide a contact closure to
signal an external device (alarm bell, phone dialer,
etc.) of a problem.
For multiple boiler (cascade) installations, a single
852-1 Interface can be used to signal an error with
any boiler in the system. The control is to be
connected only to the Master boiler.
2. Analog Input:
The 852-1 Interface Adapter will accept an analog
input of 0-10 VDC to control the supply setpoint
temperature. This signal is typically provided by a
Building Automation System.
For multiple boiler installations only one 852-1
Interface Adapter is required. The Interface Adapter
should be connected to the Master boiler in the
cascade system.
3. Modbus Interface:
The 852-1 Interface Adapter allows external access
to boiler status information using MODBUS RTU
protocol. This provides remote access to
Temperatures, Operating Status and Error
Information as applicable.
One 852-1 control is required for each boiler to
which Modbus communication is desired. In a
multiple boiler cascade control configuration, each
boiler must be equipped with a 852-1 Interface
Control to allow full communication.
a. Temperatures: Supply, Return, DHW and Vent
Temperatures can be monitored.
b. Operating Status: The boiler status can be
monitored to determine if the boiler is in
Standby, Prepurge, Ignition, Firing, Postpurge or
Alarm conditions.
c. Error Information: If the boiler is in a lockout or
blocking error, the interface will allow access to
the error code.
B. PRE-INSTALLATION
1. IE-199 & IE399 boilers come equipped with pre-
wired harnesses to connect the 852-1 Interface
Adapter. If Modbus is required, two additional wires
(provided with the kit) must be connected as shown
in Figure 2.
2. For stand alone boilers, one 852-1 Interface Adapter is
required for each unit. For multiple boiler installations,
one 852-1 Interface Adapter will provide Alarm
information, Setpoint control, and/or Modbus interface
for the system. If individual boiler information is
required, an interface unit is required for each of them.
3. The 852-1 Interface Adapter is designed to fit within
the Infinite Energy boiler jacket. This manual will
provide suggested mounting locations and wiring
diagrams.
C. INSTALLATION
1. Figure 1 shows the suggested mounting location
for the 852-1 Interface Adapter on the IE-199
and IE-399 boilers.
• These boilers come equipped with pre-wired
harnesses to connect the 852-1 Interface
Adapter. If Modbus is required, two additional
wires (provided with the kit) must be connected
as shown in Figure 2.
2. Attach 852-1 Adapter to jacket panel using adhesive-
backed Velcro provided with the kit.
D. ELECTRICAL – WIRING
1. Figure 2 shows customer wiring connections for the
852-1 Interface Board.
2. IE-199 & IE-399 boilers are equipped with harnesses
that provide power and communication to the
Interface Board, and alarm contact output to the boiler
terminal strip. Connect alarm to boiler terminal strip.
3. Analog Input (where used):
For the IE-199 and IE-399, connect the analog input
device to terminals #15 (+) and #16 (-) on the
boiler terminal strip located behind the remote
control display.
Figure 1