Raypak MVB TYPE B 504-2004 Instrucciones de operaciones descargar pdf (Pagina 15)

Table F: Heater Rates of Flow and Pressure Drops

Note: Basis for minimum flow is ΔT. Basis for maximum flow is gpm.

equipped with flow control valves or other automatic

means to prevent gravity circulation of the heater

water during the cooling cycle. It is highly recommend-

ed that the piping be insulated.

Air-Separation/Expansion Tank

All heaters should be equipped with a properly sized

expansion tank and air separator fitting as shown in

Fig. 9.

Three-Way Valves

Three-way valves intended to regulate system water

temperatures by reducing flow in the boiler should not

be used. Raypak heaters are high-recovery, low-mass

heaters which are not subject to thermal shock. See

Fig. 14 and instructions on page 17 for adjusting the

manual bypass.

Fig. 9: Air-Separation/Expansion Tank

Fig. 10: Single Heater - Low-Temperature (Heat Pump)

Application with Primary/Secondary Piping

Fig. 11: Dual Heaters (Reverse/Return)

with Primary/Secondary Piping

Model

No.

Input Output 20° ΔT 30° ΔT 40° ΔT Min. Flow Max. Flow

MBTUH gpm ΔP gpm ΔP gpm ΔP gpm ΔP ΔT gpm ΔP ΔT

504 500 420 42 2.7 28 1.4 25 1.1 34 100 11.3 8

754 750 630 63 6.0 42 2.9 32 1.7 32 1.7 40 100 13.8 13

1104 1100 924 92 13.3 62 6.7 46 4.1 46 4.1 40 113 18.6 16

1504 1500 1260 84 13.3 63 8.0 63 8.0 40 113 22.2 22

2004 1999 1679 112 26.9 84 16.0 84 16.0 40 113 27.2 30

*Maximum 4 times the pipe diameter or 12”, whichever is less.

California Hot Water Supply, Inc.

(800) 249-7244

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Raypak MVB TYPE B 504-2004 Instrucciones de operaciones Pagina 15