2
5. Electrical installation, start-up and maintenance work on
this equipment should be undertaken by competent and
trained personnel in accordance with local relevant stan-
dards and codes of practice.
INSPECTION
1. Inspect unit upon arrival. In case of damage, report im-
mediately to transportation company and your local fac-
tory sales representative.
2. Check rating plate on unit to verify that the power supply
meets available electric power at the point of installation.
3. Inspect unit received for conformance with description
of product ordered (including specifications where
applicable).
GENERAL
The 42WKN ceiling cassette units effectively make each
area served an independently controlled temperature zone.
Through thermostatic control of operations, conditions can be
varied to suit diverse requirements or activities. Optional con-
trols, plus outside and return-air connections, are available to
provide for ventilation and recirculation of room air.
The 42WKN hydronic fan coil unit water connections are
fixed to the unit body to avoid breaks when the pipes are con-
nected. The upper coil connection is supplied with an air purge
valve; the lower connection is supplied with a water purge
valve. Minimum entering water temperature for the water
circuit is 39 F; maximum is 180 F. If room temperature goes
down to 32 F or lower, it is advisable to empty the water circuit
to avoid the potential for ice breaks.
Refer to Table 1 for unit physical data and Fig. 1-3 for unit
dimensional data.
DANGER
Appliances must not be installed where they may be
exposed to potentially explosive or flammable atmosphere.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, injury or death.
Read the installation, operating and maintenance instruc-
tions thoroughly before installing or servicing this
equipment.
WARNING
Disconnect power supply before making wiring connec-
tions to prevent electrical shock and equipment damage.
All appliances must be wired strictly in accordance with
the wiring diagram furnished with the appliance. Any wir-
ing different from the wiring diagram could result in a haz-
ard to persons and property.
CAUTION
Any original factory wiring that requires replacement must
be replaced with wiring material having a temperature rat-
ing of at least 105 C.
Ensure that the supply voltage to the appliance, as
indicated on the serial plate, is not more than 5% over
rated voltage or less than 5% under the rated voltage.
When servicing or repairing of this equipment, use only
factory-approved service replacement parts. Refer to the
rating plate on the appliance for complete appliance model
number, serial number and company address. Any substitu-
tion of parts or controls not approved by the factory will be
at the owner's risk.
Do not attempt to reuse any mechanical or electrical con-
trollers which have been wet. Replace defective controller.
IMPORTANT: Make sure the ceiling grid is supported sep-
arately from the appliance. The ceiling must not be sup-
ported by any part of the appliance, fascia or any associated
wiring or pipe work.
Start-up and adjustment procedures should be performed
by a qualified service agency.
