GF
-
128
Innovation Series Water Heaters
Chapter 2
OMM-0079_0B
USER MANUAL
Installation
Page
24
of
200
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph.: 800-526-0288
07/21/11
All supplied signals must be floating (unground-ed) signals. Connections between the source and the
Heater’s I/O Box must be made using twisted shielded pair of 18–22 AWG wire such as Belden 9841(see
Figure 2-12). Polarity must be maintained and the shield must be connected only at the source end and
must be left floating (not connected) at the Heater’s I/O Box.
Whether using voltage or current for the drive signal, they are linearly mapped to a 40°F to 240°F setpoint
or a 0% to 100% air/fuel valve position. No scaling for these signals is provided
2.12.4 B.M.S. (PWM) IN
Not Applicable to Water Heaters
2.12.5 SHIELD
The SHIELD terminals are used to terminate any shields used on sensor wires connected to the unit.
Shields must only be connected to these terminals.
2.12.6 mA OUT
These terminals provide a 4 to 20 mA output that can be used to monitor setpoint ( 40°F to 240°F), outlet
temperature (30°F to 240°F), or air/fuel valve position (0% to 100% open). This function is enabled in the
Configuration Menu (Chapter 3, Table 3-4).
2.12.7 EXHAUST SENSOR IN
These terminals permit an exhaust sensor to be connected to the exhaust manifold of the heater.
2.12.8 INTERLOCKS
The unit offers two interlock circuits for interfacing with Energy Management Systems and auxiliary
equipment such as pumps or louvers or other accessories. These interlocks are called the Remote
Interlock and Delayed Interlock (Figure 2-12). The wiring terminals for these interlocks are located inside
the I/O Box on the left side of the unit. The I/O Box cover contains a wiring diagram which shows the
terminal strip locations for these interlocks (REMOTE INTL’K IN and DELAYED INTL’K IN). Both
interlocks, described below, are factory wired in the closed position.
NOTE:
Both the Delayed Interlock and Remote Interlock must be in the closed position for the unit
to fire.
2.12.8.1 REMOTE INTERLOCK IN
The remote interlock circuit is provided to remotely start (enable) and stop (disable) the unit if desired. The
circuit is labeled REMOTE INTL’K IN and is located inside the I/O Box on the left side of the unit. The
circuit is 24 VAC and comes factory pre-wired closed (jumped).
2.12.8.2 DELAYED INTERLOCK IN
The delayed interlock is typically used in conjunction with the auxiliary relay described in paragraph
2.12.10. This interlock circuit is located in the purge section of the start string. It can be connected to the
proving device (end switch, flow switch etc.) of an auxiliary piece of equipment started by the unit’s
auxiliary relay. The delayed interlock must be closed for the heater to fire. If the delayed interlock is
connected to a proving device that requires time to close (make), a time delay (Aux Start On Dly) that
holds the start sequence of the unit long enough for a proving switch to make (close) can be programmed.
Should the proving switch not prove within the programmed time frame, the unit will shut down. The Aux
Start On Dly can be programmed from 0 to 120 seconds. This option is locate in the Configuration Menu
(Chapter 3).
Содержание INNOVATION INN1060
Страница 129: ...Appendix H C More Wiring Diagrams Innovation Series Water Heaters USER MANUAL APPENDIX H C MORE WIRING DIAGRAMS ...
Страница 130: ...GF 128 Innovation Series Water Heaters OMM 0079_0B USER MANUAL This Page Is Intentionally Blank ...
Страница 131: ...Appendix H C More Wiring Diagrams Innovation Series Water Heaters USER MANUAL ...
Страница 132: ...GF 128 Innovation Series Water Heaters OMM 0079_0B USER MANUAL This Page Is Intentionally Blank ...
Страница 133: ...Appendix H C More Wiring Diagrams Innovation Series Water Heaters USER MANUAL ...
Страница 134: ...GF 128 Innovation Series Water Heaters OMM 0079_0B USER MANUAL This Page Is Intentionally Blank ...
Страница 135: ...Appendix H C More Wiring Diagrams Innovation Series Water Heaters USER MANUAL ...
Страница 136: ...GF 128 Innovation Series Water Heaters OMM 0079_0B USER MANUAL This Page Is Intentionally Blank ...