A.O. Smith DRE - 52, DRE -80, DRE -120 User Manual

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DRE

Electric commercial water heater

DRE - 52/80/120

Three phase electric water heater, primarily for commercial applications • Three to nine Incoloy-sheathed elements with a maximum rating of 54 kW • Each element is independently controlled via its own control thermostat (adjustable: 49 - 82 °C) and a manually resetable high-limit thermostat • Cascade control of the elements for more efﬁ cient and faster heating-up times

• All elements and thermostats are fuse-protected • PermaGlas Ultra Coat second-generation glass coating technology helps to prevent corrosion • Replaceable magnesium anode • Safety ﬂ oat switch • Optional ancillaries: Unvented kits • Destratiﬁ cation pump kit • Powered anodes • Time controller • Alternate kW loadings

Innovation has a name.

DRE

Technical specifications

		52-9	52-18	52-36	80-9	80-18	80-36	80-54	120-9	120-18	120-36	120-54
		DRE	DRE	DRE	DRE	DRE	DRE	DRE	DRE	DRE	DRE	DRE
Electrical data
Input	kW	9	18	36	9	18	36	54	9	18	36	54
Current	A	11-13	23-25	46-50	11-13	23-25	46-50	69-75	11-13	23-25	46-50	69-75
Elements	-	3	3	6	3	3	6	9	3	3	6	9

Power supply	VAC/Hz					415 / 50

Draw-off capacity
Storage capacity	l		200			300				450
Max. temperature setting	°C	82	82	82	82	82	82	82	82	82	82	82
30 min. ∆T=44°C	l	297	377	535	406	486	644	802	570	649	808	966
60 min. ∆T=44°C	l	385	557	887	494	837	996	1330	658	825	1159	1494
90 min. ∆T=44°C	l	473	728	1238	582	877	1348	1858	746	1001	1511	2021
120 min. ∆T=44°C	l	561	904	1590	670	1013	1699	2385	834	1177	1863	2549
Continuous ∆T=44°C	l/h	176	352	704	176	352	704	1055	176	352	704	1055

Heating-up time ∆T=44°C	min.	68	34	17	102	51	26	17	153	77	38	26
30 min. ∆T=50°C	l	262	331	471	358	427	567	706	502	571	711	850
60 min. ∆T=50°C	l	339	486	780	435	582	876	1170	579	726	1020	1314
90 min. ∆T=50°C	l	416	641	1090	512	737	1186	1635	656	881	1330	1779
120 min. ∆T=50°C	l	494	796	1399	590	892	1495	2099	734	1036	1639	2243

Continuous ∆T=50°C	l/h	155	310	619	155	310	619	929	155	310	619	929

Heating-up time ∆T=50°C	min.	78	39	19	116	58	29	19	174	87	44	29
30 min. ∆T=55°C	l	238	301	428	325	388	515	642	456	519	646	773
60 min. ∆T=55°C	l	308	442	709	396	529	797	1064	526	660	927	1195
90 min. ∆T=55°C	l	379	583	991	466	670	1078	1486	597	801	1209	1617

120 min. ∆T=55°C	l	449	723	1272	536	811	1360	1908	667	942	1490	2039

Continuous ∆T=55°C	l/h	141	281	563	141	281	563	844	141	281	563	844
Heating-up time ∆T=55°C	min.	85	43	21	128	64	32	21	192	96	48	32
General
Anodes	-		2			2				2

Maximum working pressure	bar		8			8				8
Maximum weight	kg		273			410				610
Shipping data
Weight empty	kg		73			110				160

Weight incl. packaging	kg		86			125				176
Width packaging	mm		630			700				890
Height packaging	mm		1640			1770				1760
Depth packaging	mm		750			870				1050

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