Lennox KHC Series Service Literature

S e r v i c e L i t e r a t u r e
The KHC commercial heat pump is available in 7.5, 8.5,
and 10 ton capacities. The
KHC092/102/120 refrigerant systems utilize two compres-
sors, two reversing valves, two accumulators, and other
parts common to a heat pump. Optional auxiliary electric
heat is factory or field installed in KHC units. Electric heat
operates in single or multiple stages depending on the kW
input size. 7.5kW through 60kW heat sections are avail-
able for the KHC heat pump.
KHC units are designed to accept any of several different
energy management thermostat control systems with min-
imum field wiring.
Information contained in this manual is intended for use
by qualified service technicians only. All specifications are
subject to change. Procedures outlined in this manual are
presented as a recommendation only and do not super-
sede 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
To prevent serious injury or death:
1- Lock-out/tag-out before performing maintenance.
2- If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove
fan belt where applicable, and ensure all
controllers and thermostats are set to the "OFF"
position before performing maintenance.
3- Always keep hands, hair, clothing, jewelry, tools,
etc., away from moving parts.
WARNING
Improper installation,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional HVAC
installer or equivalent, service agency, or the gas
supplier
UNIT INFORMATION UNIT INFORMATION
KHC092 through 120
adjustment, alteration,
100099
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and
wear gloves and protective clothing.
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at disconnect
switch(es). Unit may have multiple power
supplies.
Options . . . . . . . . . . . . . . . . . . . . . .Page 2
Specifications . . . . . . . . . . . . . . . . . .Page 5
Blower Data . . . . . . . . . . . . . . . . . . Page 6
Electrical Data / Electric Heat Data . Page 10
I Unit Components . . . . . . . . . . . . . Page 15
II Placement and Installation . . . . . Page 28
III Start Up Operation . . . . . . . . . . . Page 28
IV Charging . . . . . . . . . . . . . . . . . . . Page 29
V System Service Checks . . . . . . . Page 30
VI Maintenance . . . . . . . . . . . . . . . . Page 30
VII Accessories . . . . . . . . . . . . . . . . Page 31
VIII Diagrams . . . . . . . . . . . . . . . . . . Page 38
Page 1
KHC SERIES
7.5 to 10 ton
26.3 to 35.2 kW
CAUTION
WARNING
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