AMPW 400-1000L I&O Manual
51
(continued)
2. Wire the tank sensor to the terminals labeled
"Header Sensor" on the low voltage PCB. Do not use
the "DHW Sensor" terminals for the tank sensor as
these terminals are used for indirect water heating.
a. Avoid placing the senor near potential sources of
electrical noise such as transformers, power lines,
and fluorescent lighting. Wire the sensor to the
appliance using 22 gauge or larger wire. As with
the sensor, the sensor wiring should be routed
away from sources of electrical noise. Where it is
impossible to avoid such noise sources, wire the
sensor using a 2 conductor,
UL Type CM, AWM
Style 2092, 300 Volt 60 C
shielded.
E. System and Circulation Pump Wiring
1. The system pump can be wired to "System Pump"
on the 120 VAC PCB.
2. The primary (Tank) circulation pump can be wired
to "Boiler Pump" on the 120 VAC PCB.
WARNING
WARNING
Appliance must be electrically grounded as re
-
quired by National Electrical Code ANSI/NFPA
70-latest edition.
Caution:
Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation.
!
6.3A, SLOW BLOW
5mm X 20mm FUSE
MAX. 5.6A
TOTAL PUMP
CURRENT DRAW
HOT
NEUTRAL
GROUND
120 VAC/60 HZ
POWER SUPPLY
OVERCURRENT
PROTECTION/DISCONNECT
BY INSTALLER
SYSTEM
PUMP
OPTIONAL
DOMESTIC HOT
WATER PUMP
BOILER PUMP
AND
COMBUSTION
AIR DAMPER
(IF USING
ROOM AIR)
Figure 23: 120 VAC Connections PCB
