Aerco BOILER MANAGEMENT SYSTEM II 5R5-384, Инструкция по установке, эксплуатации и обслуживанию

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INSTALLATION
2.10 INTERLOCK WIRING
The BMS II is equipped with two interlocks designated Interlock 1 (INT 1) and Interlock 2 (INT 2). Since
both interlocks must be closed for the BMS to operate the boiler plant, the associated wiring terminals are
jumpered, prior to shipment. If desired, proving device switches can be connected to either interlock in
place of the jumper. If used, interlock wiring connections are made as described in the following
paragraphs.
CAUTION
DO NOT remove the factory-installed jumpers for INT1 or INT2
unless the respective Interlock is being connected to an external
proving device. The boiler plant WILL NOT operate if one or both
Interlocks remain open.
NOTE
If necessary, Interlock 1, Interlock 2 or both can be programmed
to operate the boilers only when the outdoor air temperature falls
below the system start temperature. The selection is made with
“SYS START INTLK” in the Relay Menu. The default is set to
Interlock 1. See paragraph 3.11 for details.
Interlock 1 (INT 1) Wiring
Interlock 1 is often used with auxiliary equipment, such as air dampers or flow switches. It can also be
used as a general purpose interlockIf used, connect the end proving switch to INT 1 terminals 9 and 10 as
shown in the wiring diagram in Appendix E.
Interlock 2 (INT 2) Wiring
Similar to Interlock 1, Interlock 2 is a general purpose interlock which can be used with a variety of
devices or equipment or conditions that must be “proved” prior to enabling the boiler plant. If used,
connect the end proving switch to INT 2 terminals 11 and 12 as shown in the wiring diagram in Appendix
E.
2.11 SET BACK WIRING
The
SET BACK
terminals, shown in the wiring diagram in Appendix E, are used only when implementing
a manually-controlled header temperature offset. If used, connect a dry contact switch across
SET
BACK
terminals
13
and
14
. See the sub-section entitled Manual Offset included in paragraph 3.8 (Field
Adjust Menu),
2.12 RELAY WIRING
The BMS contains a System Start (SYS START) Relay, a Fault Alarm (FLT ALARM) Relay and an
Auxiliary (AUX) Relay which can be connected to external monitoring or control devices. The contacts for
each of these relays are rated at 120 VAC, 5A and are fused internally at 5A with replaceable fuses. The
contact terminals for these relays are shown in the wiring diagram in Appendix E.
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