A
HE, DE & RE MANUAL
IOM-26
20 of 33
Oct 12 R4
HEAT TRANSFER FLUIDS
The coil(s) provided have been selected for use with a specific heat transfer fluid as shown on the
Submittal Record. Use of other fluids will result in different performance and can damage the coil(s).
It is imperative to properly select and apply heat transfer fluids used in heating and cooling systems.
Untreated, improperly treated or improper use of fluids or use of fluids not approved for use in commercial
heating and cooling systems can damage coils and system components. For selection and application of
heat transfer fluids, always follow the manufacturers’ recommendations including treatment, mixing and
filling. Warranty will be void if coil damage results from misapplication or improper treatment of the heat
transfer fluid.
Some systems may use CPVC piping. Do not use propylene glycol with CPVC.
BEFORE START-UP
Remove tie-down bolts, straps and blocks on fan and compressor vibration isolators, tilt equipped heat
pipes and enthalpy/desiccant wheels if supplied.
START-UP CHECK LIST
Warning:
This unit is connected to high voltages. Electrical shock or death could occur
if instructions are not followed. This equipment contains moving parts that
can start unexpectedly. Injury or death could occur if instructions are not
followed. All work should be performed by a qualified technician. Always
disconnect and lock out power before servicing. DO NOT bypass any
interlock or safety switches under any circumstances.
The start-up and operation must be in accordance with safe practices. Start-up must be performed by
qualified personnel. Complete attached start-up record.
1.
Set all associated electrical switches, controls, thermostats and main disconnect switch to “OFF”
position.
2.
Close all manual valves and field piping valves.
3.
Confirm that all shipping materials have been removed. See any supplemental instructions shipped
with the unit to help identify possible locations.
4.
Check all bearings, drive and fan set screws for tightness. See TABLE
I
5.
Check drive alignment and belt tension. Refer to Maintenance, page 26.
6.
Inspect all electrical wiring, both field and factory installed, for loose connections. Ensure fire alarm
contact is installed, or jumpered if not required.
7.
Turn disconnect switch ON (control switch is still off) and check the supply voltage. Voltage must be
within 10% of rating plate. If not, contact the installing electrical contractor and have the voltage
condition corrected before continuing start-up.
8.
Check all fan motors for correct rotation. If incorrect, reverse rotation on incoming power only.
