Bryant 549C manual GUIDE SPECIFICATIONS — 542J150,180 cont, Manual Outdoor-AirDamper

GUIDE SPECIFICATIONS — 542J150,180 (cont)

5. Manual Outdoor-Air Damper:

Manual damper package shall consist of damper, birdscreen, and rainhood which can be preset to admit up to 50% outdoor air for year round ventilation.

*6. 25% Two-Position Damper:

a.Two-position damper package shall include single blade damper and motor. Admits up to 25% outdoor air.

b.Damper shall close upon indoor fan shutoff.

*7. Head Pressure Control Package:

Control package shall consist of solid-state control and condenser-coil temperature sensor to maintain condensing temperature between 90 F and 110 F at outdoor ambient temperatures down to –20 F by condenser-fan speed modulation or condenser-fan cycling and wind baffles.

8.Electric Resistance Heaters:

a.Open wire nichrome elements with all necessary safety operating controls.

b.UL listed and indicated on basic unit information plate.

c.Available in multiples to match heating requirements.

d.Single point kits available for each heater when required.

*9. Electronic Programmable Thermostat:

Unit shall be capable of using deluxe full-featured electronic thermostat. Thermostat shall use built-in compressor cycle delay control for both heating and cooling duty. Thermostat shall be capable of working with third party direct digital controls.

* 10. Thermostat and Subbase:

Thermostat and subbase shall provide staged cool- ing and heating automatic (or manual) changeover, fan control, and indicator light.

11. Convenience Outlet:

Outlet shall be factory-installed and internally mounted with easily accessible 115-v female recep- tacle. Outlet shall include 15 amp GFI receptacle with independent fuse protection. Voltage required to operate convenience outlet shall be provided by a factory-installed step-down transformer. Outlet shall be accessible from outside the unit.

12. Compressor Cycle Delay:

Unit shall be prevented from restarting for minimum of 5 minutes after shutdown.

13. Fan/Filter Status Switch:

Switch shall provide status of indoor (evaporator) fan (ON/OFF) or filter (CLEAN/DIRTY). Status shall be displayed over communication bus when used with direct digital controls or with an indicator light at the thermostat.

14. Power Exhaust:

Package shall include an exhaust (propeller style) fan, 1/2 Hp 208-230, 460 v (factory-wired for 460 v) direct drive motor, and damper for vertical flow units with economizer to control over-pressurization of building. Power Exhaust package must be field- installed in return-air ductwork when used with optional side return connections.

15.Outdoor Air Enthalpy Sensor (EconoMi$erIV or EconoMi$er2):

The outdoor air enthalpy sensor shall be used with the EconoMi$erIV or EconoMi$er2 device to provide single enthalpy control. When used in conjunction with a return air enthalpy sensor, the controller will provide differential enthalpy control. The sensor allows the controller to determine if outside air is suitable for free cooling.

16.Return Air Enthalpy Sensor (EconoMi$erIV or EconoMi$er2):

The return air enthalpy sensor shall be used with the EconoMi$erIV or EconoMi$er2 device. When used in conjunction with an outdoor air enthalpy sensor, the EconoMi$erIV or EconoMi$er2 device will pro- vide differential enthalpy control.

17.Return Air Temperature Sensor (EconoMi$erIV or EconoMi$er2):

The return air temperature sensor shall be used with the EconoMi$erIV or EconoMi$er2 device. When used in conjunction with the standard outdoor air temperature sensor, the EconoMi$erIV or EconoMi$er2 device will provide differential temper- ature control.

18.Indoor Air Quality (CO2) Sensor (EconoMi$er2):

a.Shall have the ability to provide demand ventila- tion indoor air quality (IAQ) control through the economizer with an IAQ sensor.

b.The IAQ sensor shall be available in duct mount, wall mount, and wall mount with LED display. The set point shall have adjustment capability.

19.Indoor Air Quality (CO2) Room Sensor (EconoMi$erIV):

Sensor shall have the ability to provide demand ven- tilation control through the EconoMi$erIV. The IAQ sensor shall be wall mounted with an LED display in parts per million. The set point shall have adjustment capability.

20. Return Air CO2 Sensor (EconoMi$erIV):

Sensor shall have the ability to provide demand ven- tilation control through the EconoMi$erIV. The IAQ sensor shall be duct mounted. The set point shall have adjustment capability.

21. Ultra-Violet Germicidal Lamps:

Ultra-violet germicidal lamps are designed to elimi- nate odor causing mold and fungus that may develop in the wet area of the indoor section of the unit. The high output, low temperature germicidal lamps are field installed in the indoor section of the unit, aimed at the indoor coil and condensate pan. The short wavelength ultra-violet light inhibits and kills mold, fungus and microbial growth. The lamps

have	an output rating at 45 F in 400 fpm airflow
of	120 microwatts/cm2 at 1 meter.

22. Hinged Panel Option:

Hinged panel option provide hinged access panels for the filter, compressor, indoor fan, and control box areas. Filter hinged panels permit tool-less entry for changing filters. Each hinged panel is permanently attached to the rooftop unit.

23. Emergency Heat Control Package:

When mechanical heating is locked out, auxiliary heat shall be activated when necessary.

542J

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