User Guide
60
Design Guide - HZH/HZV Series
HZ Series 60Hz Engineering Specications – Page 1
NOTICE!
HZD/H/V SIZE 024-070 60Hz
ENGINEERING SPECIFICATIONS
General:
Furnish and install HZ Water Source Heat Pumps, as indicated on the plans. Equipment shall be completely assembled,
piped, and internally wired. Capacities and characteristics as listed in the schedule and the specications that follow.
Units shall be supplied completely factory built capable of operating over an entering water temperature range from 20°
to 120°F (-6.7° to 48.9°C) as standard. Equivalent units from other manufacturers may be proposed provided approval to
bid is given 10 days prior to bid closing. All equipment listed in this section must be rated and certied in accordance
with Air-Conditioning, Heating and Refrigeration Institute/International Standards Organization (AHRI/ISO 13256-1). All
equipment must be tested, investigated, and determined to comply with the requirements of the standards for Heating
and Cooling Equipment UL-1995 for the United States and CAN/CSA-C22.2 NO.236 for Canada, by Intertek Testing
Laboratories (ETL). The units shall have AHRI/ISO and ETL-US-C labels.
All units shall pass a factory acceptance test. The quality control system shall automatically perform the factory acceptance
test via computer. A detailed report card from the factory acceptance test shall ship with each unit. (Note: If unit fails the
factory acceptance test it shall not be allowed to ship. Unit serial number will be recorded by factory acceptance test and
furnished on report card for ease of unit warranty status.)
Basic Construction:
Horizontal units shall have one of the following air ow arrangements: Left Inlet/Straight (Right) Discharge; Right Inlet/
Straight (Left) Discharge; Left Inlet/Back Discharge; or Right Inlet/Back Discharge as shown on the plans. Units must
have the ability to be eld convertible from straight to back or back to straight discharge with no additional parts or
unit structure modication. Horizontal units will have factory installed hanger brackets with rubber isolation grommets
packaged separately.
Vertical Units shall have one of the following air ow arrangements: Left Return/Top Discharge, Right Return/Top
Discharge, Left Return/Bottom Discharge, Right Return/Bottom Discharge as shown on the plans.
If units with these arrangements are not used, the contractor is responsible for any extra costs incurred by other trades. All
units (horizontal and vertical) must have a minimum of three access panels for serviceability of compressor compartment.
Units having only one access panel to compressor/heat exchangers/expansion device/refrigerant piping shall not be
acceptable.
Compressor section interior surfaces shall be lined with 1/2 inch (12.7mm) thick, 1-1/2 lb/ft3 (24 kg/m3) acoustic type
glass ber insulation. Air handling section interior surfaces shall be lined with 1/2 in (12.7mm) thick, 1-1/2 lb/ft3 (24 kg/m3)
foil-faced ber insulation for ease of cleaning. Insulation placement shall be designed in a manner that will eliminate any
exposed edges to prevent the introduction of glass bers into the air stream. Units without foil-faced insulation in the air
handling section will not be accepted.
The heat pumps shall be fabricated from heavy gauge galvanized steel with powder coat paint nish. Both sides of the
steel shall be painted for added protection.
Standard cabinet panel insulation must meet NFPA 90A requirements, air erosion and mold growth limits of UL-181,
stringent fungal resistance test per ASTM-C1071 and ASTM G21, and shall meet zero level bacteria growth per ASTM
G22. Unit insulation must meet these stringent requirements or unit(s) will not be accepted.
All horizontal units to have factory installed 1”(25.4mm) discharge air duct collars, 1”(25.4mm) lter rails with 1”(25.4mm)