WATLOW IND. WATROD Circulation Heater Installation & Maintenance Manual
I&M NUMBER: | Page: 3 |
Date: 6/11/2008 | Rev: 2.00 |
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AIR / GAS APPLICATION | LIQUID APPLICATION |
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Figure # 1 | Figure # 2 |
NPSH
PUMP
INCORRECT HEATER POSITION - HEATER ABOVE NPSH
NPSH
PUMP
CORRECT HEATER POSITION - HEATER BELOW NPSH
Figure # 3
When installing piping connections, care should be taken to avoid supporting the tank by the nozzles. Mounting blocks are provided to help prevent this. Provisions for thermal expansion and contraction should be considered, slotted bolt holes in one of the mating mounting pads would do adequately.
Installation of an isolation valve and pressure relief valve is recommended but not provided. Rating of valves should not exceed the ANSI class 150 flange rating. Two 1/2" FNPT couplings are provided for drainage and installation of valves.
DANGER: HAZARD OF FIRE. Electric heaters are capable of developing high temperatures so extreme care should be taken to locate heaters in safe environments. Mounting heaters in atmospheres containing combustible gases and vapors should be avoided. According to article 501 of the NEC, the maximum surface temperature of the heater shall not exceed 80 % of the
WATLOW IND.n # 6 INDUSTRIAL LOOP RD. n HANNIBAL MO, 63401n PHONE
