Raypak 503-2003 manual Installations at Elevation, Component Locations, General Information

SECTION A: Before Installation

All Raypak heaters are National Board Approved, and design-certified and tested by the Canadian Standards Association (CSA) for the U.S. and Canada. Each heater is constructed in accordance with Section IV of the American Society of Mechanical Engineers (ASME) Heater Pressure Vessel Code and bears the ASME stamp. The heater also complies with the latest edition of ASHRAE 90.1 Standard.

WARNING: Altering any Raypak pressure vessel by installing replacement heat exchangers, tube bundle head- ers, or any ASME parts not manufactured and/or approved by Raypak will instantly void the ASME and CSA ratings of the vessel and any Raypak warranty on the vessel. Al- tering the ASME or CSA ratings of the vessel also violates national, state, and local approval codes.

Installations at Elevation

Rated inputs are suitable for up to 4,500 ft elevation with- out de-rating. Consult the factory for installations at altitudes over 4,500 ft above sea level. No hardware changes are required to the heaters for installations up to 10,000 ft (adjustments may be required).

Component Locations

Panels omitted for clarity

Fig. 1: Component Locations - Side

Top panel, blower and gas train omitted for clarity

Fig. 2: Component Locations - Top

Fig. 3: Component Locations – Rear

General Information

	MBTUH		Water	Gas		Vent Size
Model				Conn.
	Input		Conn.			(in.)
No.				(NPT)
			(NPT)
	Max.	Min.		N	P	Flue	Intake
503	500	125	2	1	1	6	6
753	750	188	2	1	1	6	6
1003	999	250	2-1/2	1-1/4	1	6	6
1253	1250	312	2-1/2	1-1/4	1	8	8
1503	1500	375	2-1/2	1-1/4	1	8	8
1753	1750	438	2-1/2	2	1	8	8
2003	1999	500	2-1/2	2	1	8	8

Table A: Basic Data

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