Page 1
© 2014.
Corp. 1403-L4
Revised 05/2020
ZHA SERIES
Service Literature
7.5 to 10 ton
26.3 to 35.2 kW
ZHA092 through 120
The ZHA commercial heat pump is available in 7.5, 8.5 and
10 ton capacities. The refrigerant systems utilize two com
pressors, two reversing valves, two accumulators, and
other parts common to a heat pump. Optional auxiliary
electric heat is factory or field installed. Electric heat oper
ates in single or multiple stages depending on the kW input
size. 7.5kW through 60kW heat sections are available.
Units are designed to accept any of several different energy
management thermostat control systems with minimum field
wiring.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are sub
ject to change. Procedures outlined in this manual are pre
sented as a recommendation only and do not supersede or
replace local or state codes.
If the unit must be lifted for service, rig unit by attaching four
cables to the holes located in the unit base rail (two holes at
each corner). Refer to the installation instructions for the proper
rigging technique.
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a licensed professional
HVAC installer or equivalent service agency.
CAUTION
Electrostatic discharge can affect electronic
components. Take precautions during unit instal
lation and service to protect the unit's electronic
controls. Precautions will help to avoid control
exposure to electrostatic discharge by putting
the furnace, the control and the technician at the
same electrostatic potential. Neutralize electro
static charge by touching hand and all tools on an
unpainted unit surface, such as the blower deck,
before performing any service procedure.
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal in
jury. Take care while handling this equipment and
wear gloves and protective clothing.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon
nect switch(es). Unit may have multiple
power supplies.
Options / Accessories Page 2.......................
Specifications Page 5...............................
Blower Data Page 7................................
Electrical Data Page 11.............................
Parts Arrangement Page 15.........................
I- Unit Components Page 16.......................
II- Placement and Installation Page 24...............
III- Start-Up Page 24...............................
IV- Charging Page 25..............................
V- System Service Checks Page 28.................
VI- Maintenance Page 29...........................
VII- Accessories Page 31............................
VIII-Wiring Diagrams Page 36........................
To Next Page
Need help?
General