TYPE 829A-845
RELAY
WHITE-RODGERS
For Use With Low Voltage Thermostats
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURETOREADANDFOLLOWALLINSTRUCTIONSCAREFULLYBEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
Type 829A-845 Relay has double-pole, single-throw
switching action.
This relay is especially suitable for use on hot water
heating installations having forced circulation. It permits
the use of a sensitive low voltage room thermostat to
control the operation of both burner and circulator.
It is equally well suited for use on zoned hot water
installationswhereacirculatorandlowvoltagethermostat
are used for each zone.
PRECAUTIONS
CAUTION
To prevent electrical shock and/or equipment
damage, disconnect electric power to system, at
mainfuseorcircuitbreakerbox,untilinstallation
is complete.
If in doubt about whether your wiring is millivolt, line, or
low voltage, have it inspected by a qualified heating and
airconditioningcontractor, electrician, orsomeonefamil-
iar with basic electricity and wiring.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical
codes and ordinances.
WARNING
Do not use on circuits exceeding specified
voltages. Higher voltages will damage control
and could cause shock or fire hazard.
This control is a precision instrument, and should be
handled carefully. Rough handling or distorting compo-
nents could cause the control to malfunction.
SPECIFICATIONS
Rating: Terminals (3 & 4 and 5 & 6)
ELECTRICAL DATA
SwitchAction:Double-Pole,Single-Throw,normallyopen
Input Voltage: Terminals (1 & 2) 120V.A.C., 60Hz
Room Thermostat:
Total load must not exceed 2000 VA.
Motor: 120V.A.C. 10F.L.A. 60L.R.A.
240V.A.C.
6F.L.A. 36L.R.A.
Set adjustable heat anticipator at 0.3 Amps. For fixed
anticipationthermostats,use0.25to0.35Amp.heater.
Pilot Duty:50VA @ 24 Volts
PRINCIPLE OF OPERATION
The 829A-845 relay is provided with a self-contained
transformer with a low voltage secondary output for
energizing the relay coil.
T
T
RELAY
COIL
Line voltage lines should be connected to the terminals
marked “1 & 2” for power to reach the transformer.
2
4
6
N
Closing the thermostat circuit energizes the relay coil which
inturnclosesthecircuitsbetweenterminals3and4andalso
between 5 and 6.
LINE
HOT
DOTTED LINES
INDICATE FIELD
WIRING
1
3
5
Opening the thermostat circuit de-energizes the relay coil,
breaking the circuits between terminals 3 and 4 and also
between 5 and 6.
Fig. 1
TO LINE AND LOAD
OR PILOT DUTY
TO LINE AND LOAD
OR PILOT DUTY
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS RD., ST. LOUIS, MO. 63123
(314) 577-1300, FAX (314) 577-1517
PART NO. 37-2689D
Replaces 37-2689-3
Printed in U.S.A.
9999 HWY. 48, MARKHAM, ONT. L3P 3J3
(905) 475-4653, FAX (905) 475-4625
9512
R