landlord on the roof with interconnecting piping and wiring to be routed as per landlord’s direction. b) Provide an energy recovery ventilator (ERV) on outdoor air and exhaust. Consider electronic air cleaning (bipolar ionization). c) Provide modulating control of existing steam radiators through the VRF fan coil controllers or independent zone controllers and tie into base building BMS. d) Supplemental cooling shall be provided by VRF units.
New (Floors 48-55)
a) Building standard VAV air handling unit (AHU) with chilled water coil and associated low and medium pressure ductwork with VAV boxes. b) Provide an energy recovery ventilator (ERV) on outdoor air and exhaust. Consider electronic air cleaning (bipolar ionization). c) Where ductwork and VAV boxes are being replaced, add heating coils to VAV boxes. Heating coils shall be sized for 120/110 °F. Pipe all new hot water coils to base building corridor chiller riser. Provide modulating electronic control of existing steam radiators through VAV controllers and tie into base building BMS. d) Supplemental cooling shall utilize chilled water. BTU metering is recommended if cost allocation associated with after-hours usage is required.
Renewal/Retrofit
a) Any existing to remain constant volume units must be converted to single zone VAV or multi- zone VAV systems as necessary for code compliance. Constant volume control will not remain. b) Provide an energy recovery ventilator (ERV) on outdoor air and exhaust. Consider electronic air cleaning (bipolar ionization). c) Provide modulating control of existing steam radiators through independent zone controllers and tie into base building BMS. d) Existing supplemental units may remain until the suite is converted to VRF.
111 West 33rd Street:
New & Renewal/Retrofit
a) Air conditioning shall be provided by chilled water VAV systems. Building standard for interior zones is VAV air handling units with dual temperature (heating/cooling) coil and associated low and medium pressure ductwork with VAV boxes. b) Perimeter zones shall be heated and cooled by two-pipe induction units which are served by served by constant volume air handling units. Any existing induction units which lack motorized control valves shall be retrofit with same. c) Where space permits in existing MERs, provide an energy recovery ventilator (outdoor air and exhaust) for AHUs. d) Supplemental cooling may be provided using water-cooled DX units tied into the condenser water loop with water-side economizer. DX units shall be provided with two position control valves which shall close when the DX system cycles off and shall have two-way head pressure control valves which modulate flow when the DX system cycles on.
F. Plug Loads:
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