TYPE NH - DUAL MODELS 514-1826
1.Estimate total length of supply and return loop. Refer to table.
2.If multiple loops are used:
(A)Use multiple pumps and size return pipes according to table; or
(B)Use one larger recirculating pump with balancing valves on each return line.
3.First fixture on supply line must be a minimum of 20 feet from the heater.
4.Supply line size must be 2" minimum. If not possible, add a tank between heater and first fixture.
MINIMUM INPUT ADJUSTMENT
Model Types NH and WH have minimum input ratings as specified on their individual rating plates. Minimum input controllers have been
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