Howard HI-110 Network Transformer - Manual (Page 27)

Document 2.4.128, Revision 2
August, 2012
27
Network Transformer Instruction Manual
Table 6: Torque Guidelines for Accessories
Component
Nominal
Torque ¹
(in-lbs)
Torque
Range
(in-lbs)
Fluid level sight glass 600 480-720
Fill plug 960 900-1020
Drain plug 960 900-1020
Drain valve 600 480-720
Automatic pressure
relief device, ¼” NPT
180 160-200
Automatic pressure
relief device, cover-
mounted
300 250-350
Ground connector 160 140-180
¹ When checking tightness of gasketed components,
the measured torque will normally be less than
the nominal torque listed in the table above due
to relaxation of the gasket material. Additional
tightening of mounting hardware may cause the
component to crack or the gasket to become over-
compressed.
Additional Maintenance Instructions
These instructions are intended to be a general
guide for the maintenance of Howard secondary
network transformers, when used in typical
applications and operated in usual environments
as described in IEEE Standard C57.12.00. Although
efforts have been made to ensure accuracy and
completeness, these instructions do not address
every conceivable application or circumstance that
might be encountered.
Features and accessory devices discussed herein
may not be present in all transformers. Some
features or accessory devices may be present on a
transformer, but not discussed in these instructions.
Howard Industries does not represent that these
instructions are complete, sufficient, accurate or
useful for all circumstances.
Questions regarding installation, operation, and
maintenance (particularly when encountering
unusual or special circumstances not sufficiently
covered by these instructions) should be directed to
the Howard Industries Transformer Division.
Repair Parts
Repair parts can be ordered from the Howard
Industries Transformer Division. A description of
the part and the transformer serial number will be
required to ensure that the correct part has been
ordered.
Warranty Claims
The Howard Industries Transformer Division
should be notified immediately when problems are
discovered during the warranty period. All warranty
repairs must be made or approved by the Howard
Industries Transformer Division.