Honeywell W7459A - Manuals

SOLID STATE ECONOMIZER SYSTEM 63-2484—2 6 Fig. 5. Approximate dimensions of back mounting bracket for T6031H in in. (mm). W7459A,C Solid State Economizer Logic Module Used with C7400 Sensor or C7650A Sensor and M7415 or M8405 Actuator to proportion outdoor and return air dampers for economizer contr...

SOLID STATE ECONOMIZER SYSTEM 7 63-2484—2 IMPORTANT All inputs and outputs must be 24 Vac Class 2. Ambient Ratings: Temperature: -40°F to +149°F (-40°C to +65°C). Humidity: 5 to 95 percent RH (noncondensing). Inputs: Enthalpy (C7400) Dry Bulb Temperature (C7650) Discharge Air (C7046) Mixed Air (C715...

SOLID STATE ECONOMIZER SYSTEM 63-2484—2 8 CAUTION Personal Injury Hazard. Spring-return assembly can release. Leave end covers attached to the motor. Location and Mounting Locate motor as close as possible to the equipment to be controlled. Refer to Fig. 4 for mounting dimensions. 1. Mount motor wit...

SOLID STATE ECONOMIZER SYSTEM 9 63-2484—2 To mount the C7046C Sensor in a junction box (see Fig. 11): 1. Cut a 1/2 in. (13 mm) hole in the duct or plenum surface at the desired location. 2. Remove the center rear knockout from the junction box and insert the sensor probe through the knockout with th...

SOLID STATE ECONOMIZER SYSTEM 63-2484—2 10 IMPORTANT Failure to follow these wiring practices can introduce electrical interference (noise) that can cause erratic system operation: a. Keep wiring at least one foot away from large induc- tive loads such as motors, line starters, lighting bal- lasts, ...

SOLID STATE ECONOMIZER SYSTEM 11 63-2484—2 Wiring CAUTION Can Cause Electrical Shock or Equipment Damage. Disconnect power supply before connecting wiring. Disconnect the power supply before connecting wiring to prevent electrical shock and equipment damage. All wiring must comply with applicable lo...

SOLID STATE ECONOMIZER SYSTEM 63-2484—2 12 Fig. 16. Mounting the W7212 module on sheet metal. C7400 Enthalpy Sensor and C7650A Temperature Sensor Location and Mounting Outdoor air sensing: Mount the C7400 Enthalpy Sensor or C7650A Temperature Sensor in any orientation where it is exposed to freely c...

SOLID STATE ECONOMIZER SYSTEM 13 63-2484—2 Fig. 18. Partial psychrometric chart with single C7400A Solid State Enthalpy Sensor and W7212 or W7459 Solid State Economizer Logic Module performance curves. Fig. 19. C7400A Sensor output current vs. relative humidity. Fig. 20. C7650A Solid State Temperatu...

SOLID STATE ECONOMIZER SYSTEM 63-2484—2 14 M7415 Damper Actuator Single M7415 Damper Actuator accepts thermistor sensor input from a C7046A or a C7150B Mixed Air Sensor mounted in discharge or mixed air duct. See Fig. 27. During the occupied period, on a call for cooling, when outdoor air temperatur...

SOLID STATE ECONOMIZER SYSTEM 15 63-2484—2 M7415 and M8405 Damper Actuators Adjusting Minimum Position (Ventilation) The M7415 Damper Actuator is adjusted for desired minimum position using a Q709 Actuator Mounted Minimum Position Potentiometer and/or a remote S963B1136 Manual Potentiometer. The M84...

SOLID STATE ECONOMIZER SYSTEM 63-2484—2 16 The setpoint scale markings, located on the W7459, are A,B,C and D. Turn the setpoint potentiometer fully clockwise to the D setting. The economizer selects the air that has lower enthalpy or temperature for cooling; for example, if outdoor air has lower en...

SOLID STATE ECONOMIZER SYSTEM 63-2484—2 18 NOTES: — DCV and Free Cooling have setpoints and LED indications. — For models with a B terminal (W7213): No power to B: cooling mode, free cool enabled. Module follows logic detailed above. 24V power to B: heating mode, free cool disabled. Actuator drives ...

SOLID STATE ECONOMIZER SYSTEM 19 63-2484—2 7. If all minimum and maximum position adjustments are complete, remove the T-T1 jumper and reconnect the mixed air sensor. EQUATION 1. FORMULA TO AID MINIMUM POSITION ADJUSTMENT. ( T O × OA)+( T R × RA)= T M Where: T O = Outdoor air temperature OA = Percen...

SOLID STATE ECONOMIZER SYSTEM 31 63-2484—2 CHECKOUT AND TROUBLESHOOTING: W7212 Checkout requires a 9V battery, 620 ohm, 1.2K ohm, 5.6K ohm, and 6.8K ohm resistors. Use Table 10 and Fig. 36 for checkout. CAUTION Equipment Damage Hazard. Excessive force can damage potentiometer controls. Use a small s...

Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 customer.honeywell.com SOLID STATE ECONOMIZER SYSTEM ® U.S. Registered Trademark© 2005 Honeywell International ...