Engineering Bulletin

110-22-002-1012
3
1.6 WARRANTY
A. The Manufacturer shall warrant the circulating pumps for a period of 3 years from date of purchase, subject to the
Terms and Conditions of said Warranty. A copy of the Manufacturer’s Warranty shall be provided as part of the
Submittals as outlined in Section 1.4 of this specification.
PART 2 - PRODUCTS
2.1 TERMINAL BOXES
A. The circulating pumps shall have a high quality steel terminal box.
2.2 ELECTRICAL CONNECTIONS
A. Circulating pump shall have a coded terminal strip indicating common/neutral/ground within the terminal box for
field connections for single-phase power
2.3 ELECTRICAL
A. All 110-volt wiring shall be of 14 gauge or larger, UL/CSA approved, 300 volts, 220°F (104°C) maximum
temperature.
B. The motor shall be a class F certified winding insulation as defined by UL 778.
C. Voltage variances shall be less than +/- 10% from rated voltage with pump under load conditions for single-phase
power. Amperage variance between phases on single-phase systems shall be less than +/- 5%.
D. Impedance protection is an integral part of the pump and used to prevent against overload conditions.
2.4 CONTROL, OPERATION AND DIAGNOSTICS
A. Three-speed pumps shall have a manually adjustable speed switch, integral with the pump.
2.5 MATERIALS OF CONSTRUCTION
A. Circulating pumps shall be constructed with cast iron bodies.
B. Standard shaft offering shall be constructed of high-quality, hardened stainless steel (AISI 420).
C. Motor bearings shall be metal-impregnated carbon. Optional material shall be metal-impregnated antimony,
which does not change the pump applications.
D. Impellers will be constructed of a high strength, glass-filled polypropylene engineered composite.
E. Check valve shall be rated to a maximum temperature of 261°F (127°C) and is field installable.
F. Rotor assembly to be factory balanced.
G. Mounting flanges rotate to F or FX mounting positions (12/6 or 3/9 o’clock positions).