Laserfiche WebLink
1202(VE 175ti�ST. <br /> iGenrnore, �JA '�J8�2E3 <br /> � �r�ri�+v.gt�s-fivac.com_ <br /> � _ �, <br /> April 25, 2017 <br /> Controls Sequence: ERV-1 thru 9 <br /> Energy Recovery Ventilation units (ERV) ERV-1 throubh 9 serve as dedicated outdoor <br /> air systems, serving all classrooms, corridors, lobbies, offices, conference rooms, and <br /> storage rooms, in compliance with 2015 WSEC Section C403.6.l. The units are heat <br /> exchangers with Merv 8 filtration and comes with integral supply and exhaust fans. <br /> AC-1 throubh 10 are Variable Refrigerant Flow (VRF) systems, consisting of multiple <br /> individually metered indoor units with multi-speed fan motors, served on a single <br /> refriberation circuit with and exterior reverse-cycle heat pump with variable speed <br /> compressors and variable speed condenser fans. In compliance to Section C403.3 <br /> exception 7, the utilization of VRF and ERV systems grants exemption for economizers, <br /> with simultaneous heating and cooling for the ERVs since the heat recovery effectiveness <br /> is more than 50% as defined by Section C403,5 on the outside air. <br /> In accordance to Section C403.5, the energy recovery system shall have the capability to <br /> provide a change in the enthalpy of the outdoor air supply of not less than 50% of the <br /> difference between the outdoor air and return air enthalpies, at design conditions. <br /> ERV's are to operate continuously during occupied hours,preset via 7-day programmable <br /> controller(Mitsubishi PZ-60DR-E). The air handlers will be run based on heating and <br /> coolinb set points. When satisfied, the unit will shut off the circulatinb fan off. <br /> Please call if you have any questions or comments. "l —� `�'�`� <br /> � <br /> 1 <br /> I <br /> i <br /> �� <br /> Sincerely, �v <br /> �r <br />_ � ,; <br /> GB SYSTEMS, INC. �' <br /> Jaemin Yoo ,-" � <br /> BO i � )� <br /> � � v <br /> `� ,- <br /> � <br /> � <br /> '�A- __ �.= <br /> _ . _ <br /> . � . _ o �� � � . _ � .; _ _ ;� � a � _ o _ <br /> a <br /> �9��? �� <br /> , , <br />