TeleNav 2011 Annual Report Download - page 216

Supplemental A.C. Design: (Above Standard):
Heat Pumps or Split Systems
Condenser water piping
Condensate Drain Piping
26
• All above standard HVAC must be pre-approved by Building Management. Heat pump system shall be equipped with local room
smoke detection for fan shutdown and have building standard seismic restraints.
•
All new equipment shall be installed with a drain pan below the entire unit
•
Circuit Setters will be installed with all water source heat pumps.
•
The condenser water hoses shall be replaced with a stainless steel flow design kit hose type.
•
All heat pumps shall have the proper fuse size and the disconnect shall be of the knife type not the rocker/ex op type. Disconnect
should be as close as possible to the heat pump and access allowable.
•
New heat pumps shall be installed with 2
”
30% ASHRAE pleated Hi
-
E filters.
•
All equipment installed shall be coordinated with the Chief Engineer of the building prior to installation.
•
All equipment is to be installed to allow for adequate clearances for servicing.
•
All electrical access panels must have clearances as specified in the UEC and/or CEC.
•
Filter access to the units must be reasonable. (Consult Chief Engineer for final approval)
•
Unit location must be coordinated with furniture layout to allow for units to be accessed.
•
All units are to have ducted supply and ducted return air or Hvw plenum return as applicable for the building system.
•
Units are to have ducted fresh outside air to return air plenum within three feet of the heat pump intake provided from house fresh
air system Units must have kinetic spring vibration isolators as provided by vendor of units. If an alternative is selected, submittals
must be submitted to the Chief Engineer for review and approval.
•
All units are to be seismically supported per applicable codes (UBC, UMC or applicable Local Codes).
•
All units where ever possible are to be 480V/3 Ø
•
Unit thermostats are to be placed in the room that is conditioned.
•
All condenser water piping shall be of Type L or greater copper pipe or supplemented with brass fittings as needed. There shall not
be any galvanized or black iron pipe installed in the condenser water system unless approved by Building Management
•
All new isolation valves shall be
“
Nibco
”
or equivalent ball valves with a minimum 125 WOG pressure rating. No gate, globe or
angle valves.
• All newly installed heat pumps shall have “Petes Plugs” installed in both the supply and return condenser water lines. The Petes
Plugs shall be installed such that a standard piercing type pocket thermometer may be easily inserted for temperature readings. A
“Jomar” style ball valve shall be installed on the high line of the unit as a vent and on the low line as a drain. Both of these valves
shall contain a plug to prevent any water damage from valve failure or accidental opening.
• All condenser water piping 1” and above shall be brazed using silver solder. All joints less than 1” can be brazed or soft soldered
using Silvabrite #8 or Staysilv 100 type solders. 50/50 type solders are not to be used on the condenser water piping.
• HVAC contractor shall schedule with the engineering Dept. for shut down scheduling, draining of system and review the scope of
work to be performed.
• All condensate drains are to be installed such that at the unit the drain line can be easily disconnected for service or maintenance
and reconnected. This can be done by either unions or flexible hose and hose clamps.
•
All condensate drain piping is to be Type M or better copper.
•
All condensate drains are to be gravity drains. If a gravity drain is not possible, installing a condensate pump must be consulted and
approved by the Chief Engineer
•
If a condensate pump is installed it must be supported with a heavy gage metal support and electrical connections to the condensate
pump must be both UL and NEC approved. Use of a typical, above ceiling duplex outlet is NOT acceptable