Braeburn 229051 - Manual

Designed to Interface with Most Heating and Cooling Systems
These relays sense current rather than measure voltage, making them more reliable. They are less expensive than using traditional flow
switches, pressure switches or other types of relays. The relay installs around the blower motor’s common lead and interface easily
into the circuitry.
The current sensing relay case is constructed from high-impact plastic. The lead wire bracket is protected by a soft sponge insert, in
order to prevent damage to the motor/blower wire and/or accidental contact with any metal.
Installation Instructions
Common
Blower Lead
5 Amp. Min.
24 or 120 VAC.
L
O
A
D
229050 and 229051 Current Sensing Relays
General Installation Procedures
Important:
The wire lead bracket needs to carry a minimum of 5.0 amps for proper operation. If the current draw is less than 5.0 amps,
wrap the lead wire around the bracket so that it passes between the bracket and relay housing two or more times.
Caution:
Turn off all power to the furnace motor circuit and cabinet.
1. Follow the step-by-step instructions for
mounting the humidifier, found in the
humidifier installation manual.
2. Please follow these wiring instructions:
A. Turn off electrical power to the
furnace. Attach the current sensing
relay around the common lead of
the furnace blower motor. The relay
must be located at least 3” from any
transformer. Make sure the relay’s
metal bracket does not touch any
other metal. (See detail A)
B. Confirm the voltage of the switched
load matches the current sensing relay.
C. Wire the current sensing relay as
required for this installation. Refer to
the figures shown below as reference.
For Digital Humidistats, refer to the
Digital Humidistat wiring diagrams.
3. Follow the instructions supplied with the
humidifier to complete the installation.
Model 229050 Wiring Diagrams (24 Volt)
120 V
120 V 24 V
Bypass Humidifier
BRAEBURN MODELS 220700/220750 BRAEBURN MODELS 220500/220550 & 220600/220650
Detail A
Z
X
Y
EL
LO
W
LE
A
D
Y
EL
LO
W
LE
A
D
Y
COMMON
LEAD
FURNACE
BLOWER
MOTOR
FURNACE
BLOWER
MOTOR
CURRENT
SENSING
RELAY
229100 229100
COMMON
LEAD
CURRENT
SENSING
RELAY
X
Z
Y
229050 (24-volt) and 229051 (120-volt) Current Sensing Relays
229050
Fan Powered Humidifier
229050