Raypak 0133-4001 Manuel D’Utilisation

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.

23

Model Types NH and  WH have minimum input ratings as specified on their individual rating plates.  Minimum

input controllers have been pre-set at the factory.  Consult with factory representatives if a minimum input
problem should occur.