POWER VTX
®
WATER HEATER
38
PV500-68 06/16
13
REMOTE CONNECTIONS – TERMINAL STRIP
13.1 Making BMS/BAS remote connections for analog and binary (on/off) signals
A terminal strip for the remote connections is located in the upper portion of the control panel and is accessed by
first removing the lower control panel cover and then removing the the two screws that secure the upper control
panel. The panel will then swing forward on the side hinges.
IMPORTANT:
Do not use single strand bell wire for remote field connections to terminals R1-R2 and C1-C2. Use
only multi-strand copper wire. See table below for wire length and gauge:
WARNING: Turn off all electrical service to the appliance when accessing the remote connections and close
and fasten the control cabinet cover before restoring electrical service to the appliance. The remote
connection terminals are High Voltage or may become High Voltage. If the electrical service is not turned
off and these terminals are touched, a dangerous shock could occur, causing personal injury or death.
Coupez l'alimentation avant intervention sur l'appareil.
13.2 Terminal Functions - The following describes the functions of each of these terminals and the proper
method for interfacing with an Energy Management System:
L1-L2:
Used for incoming 120VAC power supply connection.
Terminal
L1
is the hot terminal (Black) and
L2
is neutral (White). See the product catalog or specification document
for circuit ampacity rating.
R1-R2:
Used to activate / de-activate water heater from remote master control. Terminals are wired to a relay in a
remote Energy Management System. When the relay closes, the circuit from R1 to R2 is completed and appliance
controls are enabled. This appliance ships from factory with a jumper between terminals Remove jumper when
connecting to a remote controller.
A1-A2:
Used to activate a remote alarm, signaling shutdown of combustion control.
Provides a maximum 2 amp relay contact closure when the control system terminates operation due to a tripped
safety interlock (i.e.: air proving switch, high limit switch or flame sensor, etc.).
P1-P2:
Provides a 5 amp contact closure to control remote equipment (i.e. mechanical room air louvers, draft
inducer or power vent, etc.). Do not directly energize pumps or motors through these terminals. If operation or
repositioning of the remote equipment is required for safe operation of the appliance, the remote equipment must
send a return proving signal to terminals C1-C2, via its proving switch, to confirming proper operation or
repositioning to enable the appliance to energize.
C1-C2:
Used for proving operation of remote device. Terminals are wired to a proving switch on a remote device
such as a power venter, louvers or a combination of these in series. When all remote proving switches close, the
circuit from C1 to C2 is completed and the appliance controls are enabled. This appliance ships form the factory
with jumper between terminals C1 and C2 that must be removed when a proving switch is connected.
Wire Gauge
18 GA
16GA
14 GA
12 GA
Maximum Length
30 FT
50 FT
75 FT
100 FT
