Honeywell Heating System 96-6127-2 User's Manual
Contents
1. HONEYWELL TRA ELINE CONTROLS APPLICATION The R845A Switching Relay provides dpst switching for hydronic zone controlled heating systems or spst control of 2 separate loads One load must be line yoltage the other may be either line or low voltage The R845A may be directly controlled by any 2 wire series 80 thermostat such as the T86A Round Thermostat or T852A Electric Clock Thermostat Terminals 3 and 5 are not connected to an internal power source Connections must be made to the R845A power supply or a separate power supply INSTALLATION T a oo a PETON LOCATION AND MOUNTING The R845A Switching Relay should be mounted vertically on a firm partition or wall as near as possible to the controlled equipment see Fig 1 for mounting dimensions 4 MOUNTING HOLES KNOCKOUTS FOR 1 2 INCH CONDUIT Fig 1 Approximate dijiiensfong in itches H A Rev 8 75 005 _ R845A SWITCHING RELAY To reduce transformer hum and relay noise that are sometimes amplified by mounting surfaces of sheetmetal plasterboard and similar materials place rubber or felt washers between the case and the mounting surface 1 Position the relay and mark the screw holes See Fig 2 2 Start a screw for the keyhole type mounting hole in upper right corner Screw it down to 1 8 inch from the mounting surface 3 Hang the relay on the screw position the case and start the bottom scr2. IRED A WHEN CONTROLLING TWO LOADS USE 3 AND 4 FOR LINE VOLTAGE LOAD AND 5 AND 6 FOR LINE OR LOW VOLTAGE A IF USING LOW VOLTAGE USE A SEPARATE TRANSFORMER ve Fig 4 Typical hookup for controlling 2 loads CHECKOUT _ __________ Check completed installation for proper connections and for correct operation of all system components Manufacturing in Australia Canada Finland ice Germany Japan PRINTED IN BSA
3. ew tighten both screws MAXIMUM AMBIENT TEMPERATURE 60 Hz 115 F 50 Hz 105 F MOUNTING LOAD TERMINALS LINE VOLT AGE ONLY LINE OR LOW VOLT AGE LOAD POWER TERMINALS SUPPLY TERMINALS Fig 2 R845A with cover removed WIRING All wiring must comply with applicable codes ordinances and regulations Provide disconnect means and overload protection as required See Figs 3 and 4 for typical connection diagrams aE O MPORTANT When using the R845A to contro both line and low_voltage loads always use terminals 5 and 6 I 4 fokthe I voltage load Form Number 95 6127 2 Residential Div O ADDITIONAL R845A RELAYS FOR OTHER ZONES rir R845A RELAY THERMOSTAT BURNER CONTROL CIRCULATOR ZONEI HYDRONIC HEATING CONTROL TERMINALS A POWER SUPPLY PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQUIRED A IF CONTROLLING TWO LOADS USE 3 AND 4 FOR LINE VOLTAGE LOAD 5 AND 6 FOR LINE OR LOW VOLTAGE LOAD A IF USING LOW VOLTAGE USE A SEPARATE TRANSFORMER Fig 3 Typicat connections in a multizone hydronic heating system suitable for any number of additional zones HONEYWELL MINNEAPOLIS MINN 55408 INTERNATIONAL Sales Offices in all principal cities of the worl Mexico Netherlands Spain Taiwan United Kingdom U S A THERMOSTAT LI ro To L2 Hor Power LOAD power LOAD 2 POWER SUPPLY PROVIDE OVERLOAD PROTECTION AND DISCONNECT MEANS AS REQU
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