Heatcraft Refrigeration Products 4346B001 - Manual (Page 2)

2
Inspection
Shipment should be checked against the bill of lading to
verify that all items listed have been received.
All parts should be carefully inspected to determine if
any damage was incurred in shipment.
Any shortage and/or claims for damage should be
immediately reported to the delivering carrier followed
by filling a claim for shortages and/or damages.
Shipment of Units
Depending on the unit size and accessories included,
the shipment may be made in two or more sections.
Handling
Special care should be taken when handling and
assembling component sections of the unit. Rough
handling at the job site can result in damaged bearings,
bent shaft, etc.
All units are shipped on wooden skids. It is
recommended that units not be moved removed from
skids until they are at a place of installation. The
mounting legs/rails provided for isolators should be used
when lifting units into place.
Suspended Units
Unit sizes 03 through 41 may be ceiling suspended from
the mounting legs/based rails with 5/8” diameter rods
(furnished by others). These rods will pass through the
11/16” diameter mounting holes provided.
Unit sizes 50, 65, and 75 cannot be ceiling suspended.
Installation
It is very important that the unit be installed in a level
position to prevent distortion and to insure proper
damper operation and coil drainage.
Allow sufficient space around the unit for proper
maintenance. Major factors to be considered are
filter removal for cleaning or replacement, access
to all removal panels, removal of coils and shaft if
ever necessary, lubrication access and motor belt
adjustment.
Canvas duct connections should be used between the
unit and both supply and return air ducts.
Units are furnished with 1 1/4” F.P.T. Drain connection
on each side of the coil section. The drain line from
the drain pan connection must be adequately pitched
and should have a water seal of sufficient depth to
compensate for the air pressure within the units.
(See Condensate Drain Traps on page 4.)
When the unit is located on the roof, it must be mounted
on support beams that span load bearing walls. If this
is not done, excessive vibration may occur due to the
resiliency of the roof.
Fan noise is a function of the fan design, volume flow,
pressure, and the efficiency of the fan. Present methods
of measuring fan noise do not evaluate the pure tones
generated by some fans and these tones can be
objectionable when radiated into occupied spaces.
Therefore, on critical applications we recommend extra
sound attention in the octave band containing the tone.
Motors & Drives
All units will normally be shipped with motor and drive
installed.
When mounting a motor on the adjustable base (Installed
on the unit) extreme care should be taken to insure
proper alignment and belt tension.
All electrical work should be done in strict accordance
with local codes and regulations.
Steam Coils
Type “J” and “NFS” coils have supply and return
connections on the same end. Types “R”, “S”, and “RA”
coils have supply and return connections on opposite
ends.
Type “NFD” coils have supply connections one each end
of the coil , with a single return connection, one end only.
All piping should be in accordance with accepted
industry standards and local codes. Support all piping
independent of coil and provide adequate swing joints in
all piping to absorb expansion and contraction strains.
Run return piping the full size of the coil return connection
from the coil to a dirt pocket. (do not use reducing
fittings.)
Install drip traps in steam mains ahead of coils. Do not
drip steam mains through the coils.
Install a vacuum breaker (1/2” 15º check valve) ahead of
the trap on low pressure open gravity return systems and
on high pressure systems. Install a 1/2” 15º swing check
valve in a 1/2” vacuum equalizing line, bypassing the
condensate trap, on low pressure vacuum systems.