ECR 075 97gb, Installation, Operation & Maintenance Manual

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8 - ELECTRICAL CONNECTIONS
• Outdoor Sensor, if used.
A. Provided with boiler in accessory kit.
B. Locate outdoor sensor to protect against wind and
direct sunlight. Mounting instructions provided with
sensor.
C. Maximum wire length is 100 ft (30m) for 22 ga.
wire, or 150 ft (45m) for 18 ga. wire.
D. Connect wires to low voltage terminal plug
OUTDOOR SENSOR terminals. Wires are
interchangeable.
• System Sensor (Multiple boiler applications only)
• Domestic Hot Water (DHW) Thermostat, if used.
A. Use temperature control with dry contacts rated
at 0.5 amps @ 120 VAC. Boiler control does not
provide power to DHW temperature control.
NOTICE
Do not apply power to DHW T-T terminals. Dry
contact only, use of isolation relay may be necessary.
B. Maximum wire length is 330 ft (100 m) 22 gauge
wire.
C. Connect wires (interchangeable) to low voltage
terminal plug DHW T-T terminals. Wires are
interchangeable.
• Central Heating Thermostat
A. Use thermostat or boiler system control with dry
contacts related 0.5 amps @ 120 VAC. Boiler
control does not provide 24 VAC power to central
heating thermostat.
B. Locate and install thermostat per manufacturer's
instructions. Maximum wire length is 330 ft (100
m) for 22 ga. wire.
C. Connect wires to low voltage terminal plug CH T-T
terminals. Wires are interchangeable.
NOTICE
Use dry contact for wires to CH T-T terminal and
DHW T-T terminal. E33 error code is displayed if
voltage is sent back to the control board. If error
is not corrected for extended period of time, this
voltage can permanently damage control board.